JPH0353728A - Information record transmission method - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an information recording and transmission method, an information recording medium, and an information recording medium reproducing apparatus for transmitting a mixture of acoustic data and non-acoustic data.

Conventional technology Conventional information recording and transmission methods include, for example,
Figure 18 is a diagram of the format of the transmission signal in this conventional information recording transmission method, which is used in the information transmission device shown in Publication No. 219832. Even if we are talking about the case where audio data and image data are inserted into this signal format and transmitted, in other words,
Use the CX. bit as a flag code. Depending on the flag code, the format of the upper 14 bits is changed to the format of the digital audio data.
When the flag code is "00", 14-bit linear quantized acoustic data is transmitted, and the flag code is "01".
”, linearly quantized acoustic data of 10 bits and 4
10 when the bit's image storage flag code is "lO"
The invention solves the problem even if 9-bit non-linear quantized audio data and 5-bit image data are transmitted when the flag code is "l1". However, the above method has the following two problems: One problem is that the signal-to-noise ratio (hereinafter referred to as the S/N ratio) of the acoustic signal deteriorates. This happens because non-acoustic data is always recorded in the lower bits, which reduces the number of bits for transmitting the acoustic signal and increases quantization noise.This is especially a problem at low volumes when the acoustic signal is small. One task C'L
If all the data is mistakenly converted into digital-to-analog data as audio data, noise will be reproduced even during silent periods. For example, consider a case where the above-described information recording and transmission method is applied to a compact disc, and a temporary storage delay means and the separation command are transmitted.

When a compact disc recorded with a temporary storage delay means and the above-mentioned separation command is played back on an existing compact disc player, even if the audio data is O, it will be L.
Non-acoustic data is reproduced as an acoustic signal.

This becomes a major problem when considering compatibility with existing equipment.

The present invention takes this into consideration, and is designed to transmit non-acoustic data mixed with the lower bits of acoustic data.
It is an object of the present invention to provide an information recording and transmission method that can secure the N ratio and prevent noise from being reproduced during silent periods. value
The lower A bits of the acoustic data (A: A<N) in at least one of the cases where the compared value is greater than or equal to a positive predetermined value and the compared value is less than or equal to a negative predetermined value.
is replaced with non-acoustic data and transmitted, and in other cases, the acoustic data is transmitted; N-bit acoustic data is used as a compared value; Sleep for a certain period from at least one of the time when the compared value becomes equal to or higher than a predetermined value, or the time when the compared value becomes equal to or less than a negative predetermined value. In the information recording transmission method characterized in that the acoustic data is transmitted by replacing it with non-acoustic data, and in the other two types of information recording transmission methods, the compared value is the envelope of the acoustic data. an information recording transmission method characterized in that the compared value is envelope data of acoustic data, and a period A during which the compared value is equal to or greater than a positive predetermined value is equal to or greater than a predetermined period; and, in at least one of the following cases, period B in which the compared value is less than or equal to the negative predetermined value is greater than or equal to the predetermined time, in which case the acoustic data is Lower C bit (C
: C<N) is replaced with non-acoustic data and recorded or transmitted; otherwise, the acoustic data is recorded or transmitted.

Function The present invention provides a delay means for temporarily storing data by the method described above;
In other words, by recording non-acoustic data in the lower bits only when the absolute value of the acoustic data is large, or when the absolute value of the envelope data is large, it is possible to mix and transmit the separation commands. The S/N ratio can be ensured, and even if all the data is reproduced as audio data, no noise will be generated during the silent period. The medium drive device will be described with reference to the drawings and tables. First, as a first example, a case where lower bits are replaced when the value of acoustic data is greater than or equal to a positive predetermined value will be described.
@ The second part will be explained with reference to Figure 3 and Tables 1 and 2. The blocks on the data sending side in the example are as follows: Figure 3 shows the blocks on the data receiving side in the first embodiment; Table 1 is the data substitution table on the sending side;
Table 2 is a data separation table on the receiving side. In Fig. 1, the horizontal axis is time, and (a) shows the change in the value of the acoustic signal L. 11 is the acoustic signal l2 is the positive default K.
(b) is a schematic diagram of the digital data being transmitted.
3 is the audio data obtained by converting the analog audio signal into analog to digital; 14 is the data obtained by replacing the lower bits of the audio data with non-acoustic data; and 21 is the analog data obtained by converting the analog audio signal into analog to digital. A digital conversion ratio 22 monitors the value of the acoustic data output from the analog-to-digital conversion means 2l, and outputs a replacement command when the value exceeds a positive predetermined value.A level detection ratio 23 indicates the replacement output by the level detection ratio 22. Replacement method 24 replaces the lower 4 bits of acoustic data with non-acoustic data according to the command. Output processing ratio 25 modulates and outputs data according to the characteristics of the transmission path. Replacement command is sent from the level detection means 22 to the replacement means 23. In Figure 3, 31 is an input processing signal that demodulates the signal sent through the transmission line and outputs digital data.
Reference numeral 32 indicates a separation judgment unit that monitors the value of digital data output from the input processing means 31 and outputs a separation command when the value of this digital data is equal to or greater than a positive predetermined value. Delay means for temporarily storing the digital data output from the human processing means 3l according to the command; Separation hand ratio 34 for separating the digital data into the separation command. Reference numeral 34 is a separation signal that conveys the separation command from the separation judgment means 32 to the separation means 33. Part 1 @ Part 2 Figure 3 and Part I! The operation of the first embodiment will be explained using Table 2. The operation of the data sending side will be explained. Analog-to-digital conversion means 2l
inputs an analog acoustic signal, for example, the sampling frequency is 44
．． Analog-to-digital conversion is performed at 1KHz and quantization bit number is 16.
element) is converted into acoustic data expressed as an expression.
The acoustic data created in this way (upper level detection means 22 and substitution means 23 are outputted, but the level detection means 22
It compares the value of the acoustic data with the default value and detects that the value of the acoustic data has exceeded the default value. Even if the value of the acoustic data exceeds the default value, the level detection means 22 sends a replacement command to the table 1 replacement means 23. F) h. When the level detection means 22 sets the replacement signal 25 to low when sending a replacement command, the relationship between the acoustic data entering the level comparison means 22, the replacement signal 25, and the data output from the replacement means 23 is as follows. As shown in Table 1, the level detection means 22 detects that the value of the acoustic data is (OO
FF) Below h, the replacement signal 25 is set low and f, (
0100) h or more, the operation is set to low. When the replacement command output from the level detection means 22 is not received, the replacement means 23ζ outputs the acoustic data itself, and when it is received, it outputs the lower 4 bits of the audio data. Replaced with non-acoustic data and output This is 13, l in Figure 1.
4. Acoustic data with or without the lower bits replaced with non-acoustic data is outputted from the replacing means 23, processed by the output processing means 24 according to the characteristics of the transmission path, and outputted. When using a compact disc as a media, the digital data obtained in this way is subjected to processing such as adding CIRC, EFM modulation, and adding control signals such as synchronization signals and time information.1. X, record on compact disc 4
CIRC and (yo “Cross Interleave
Abbreviation for ``Reed-Solomon Code.''
It is a code added to efficiently detect and correct data errors that occur on optical disc media. 6, EFM modulation is rEight to Fourteen M.
Roughly 8 bits of data of odulationB is 14
This is a modulation method that converts the bits into bits and modulates them into a signal format suitable for recording on optical disk media (narrow frequency band, low direct current).Next, we will explain the operation on the data receiving side. The digital data ζ processed according to the characteristics of the signal is demodulated by the human processing means 31.

The input processing means 31 uses a delay means for temporarily storing the signal in the above-described manner, an optical pickup from the compact disc on which the separation command is recorded, and performs processing such as synchronization signal detection, EFM recovery, and CIRC release. By demodulating and outputting 16-bit digital data, the output digital data is shown in table 2. The value of (F)
h. The separation determining means 32 sends a separation signal 34 when sending a separation command.
When set to low, the relationship 4 between the digital data entering the separation judgment means 32, the separation signal 34, and the data output from the separation means 33 is as shown in Table 2. In other words, the separation judgment means 32 performs GEL input processing. Means 3
The value of digital data output from l is a positive default value (0
LA (0100) Monitors whether or not the value is higher than h. If the value is higher than h, the separation signal 34 is set to low. The separation means 33 consists of a switch circuit, and when the separation signal 34 is high, the digital signal output from the input processing means 3l is The data is output as it is as audio data, and when the separation signal 34 is low, the upper 12 bits of the digital data are separated into the lower 4 bits and outputted as the delay means for temporarily storing each bit and the separation command.

For example, when the value of the digital data output from the input processing means 3l is (OIOF)h, the upper separation judgment means 32 sets the separation signal 34 to low because the digital data is greater than the positive predetermined value (0100)h. The separation means 33 receives the separation signal and converts the digital data into acoustic data (010
0) h and non-acoustic data (F) Sumoko's result separated into h and output When the value 11 of the acoustic signal is greater than the positive default value 12, digital data in which the lower 4 bits of the acoustic data are replaced with non-acoustic data When l4 is transmitted and the value 11 of the acoustic data is smaller than the positive default value l2, the acoustic data l3 is transmitted. By mixing non-acoustic data in the lower bits, it is possible to ensure a high S/N ratio at low volumes, and even if all data is played back as acoustic data, there is no noise during silent periods. As a second embodiment, regarding the case where the low-order bits are replaced after the value of the acoustic data exceeds a positive predetermined value for a certain period of time, the fourth example is the fifth example.
This will be explained using Table 4.

Figure 4 shows the principle of the information recording and transmission method in the second embodiment of the present invention. Figure 5 shows the blocks on the data exit side in the second embodiment. Figure 6 shows the blocks on the data reception side in the second embodiment. Even in the block diagram, the horizontal axis is time fl.
JL 45, 47, 49 (Yo) The period in which the lower bits of the audio data are not replaced 46, 48 B The period in which the lower bits of the audio data are replaced, and the time length is T, & 1
1, 12, l3, l4 (as explained in the first embodiment, so their explanation will be omitted here), but in FIG. , the explanation is omitted here, L
52+;t, In FIG. 6, the level detecting means monitors the value of the acoustic data output from the analog-to-digital converting means 2l and outputs a replacement signal for a certain period of time from the time when the value exceeds a predetermined value. Since it was explained in the first embodiment on 34i, the explanation is omitted here, but 62 monitors the value of the digital data output from the input processing means 3l, and when the value of this digital data exceeds a positive predetermined value. The operation of the second embodiment will be explained using Table 4. The operations on the sending side will be explained below: Analog-to-digital conversion means 21, replacement means 23, output processing means 24 (other) operate in the same manner as in the first embodiment, and level detection means 52 (other than analog-to-digital conversion means 21). It compares the acoustic data value with the positive default value and detects that the acoustic data value has exceeded the positive default value.
Even if it indicates that the value of l has become larger than the positive default value l2, when the value of the acoustic data exceeds the default value, the level detection means 52 sends a replacement command to the replacement means 23 for a certain period of time. For the period ζ, corresponding to 47 and 49 in Fig. 4, for example, the operation of the level detection means 52 is replaced from the time when the value of the acoustic data becomes equal to or higher than the predetermined value until the fourth digital data is input. Keep the signal low (that is, the fixed period of time T = 4 samples), set the default value to (0100)h, and set the non-acoustic data to (F).
h, the relationship between the acoustic data manually input to the level detection means 52, the replacement signal 25, and the data output from the third replacement means 23 is as shown in Table 3. (A sample is one piece of digital data.) In this example, 16-bit audio data or 1
6 bits and the lower bits indicate non-acoustic data. ) However, in this table, the acoustic data (from the highest to the lowest) are input to the level detection means 52. In other words, the level detection means 52 detects that the value of the acoustic data is (01
When the value exceeds (00)h, there will be an interruption from the time when the value exceeds (0100)h (sample number N+1) until the fourth acoustic data (sample number N+5) is sent.
When the replacement signal 25 is low, it is assumed that a separation command has been sent, and the lower 4 bits of the acoustic data are replaced with non-acoustic data and output. The period 46, 48 in FIG. 4 and the digital data l4 correspond to the periods 46 and 48 in FIG. This corresponds to periods 45, 47, 49 and digital data 13 in Figure 4. Input processing means 3 explains the operation of the data receiving side.
1. The separation means 331 operates in the same manner as the first embodiment, but the digital data output from the human processing means 3l (input a positive default value (0100) to the separation judgment means 32 and the separation stage 33). , the value of the non-acoustic data (F) Relationship of the output data (as shown in Table 4 above). However, in this table, it is assumed that the acoustic data {Top} are input to the separation judgment means 63 in order from the top.

In other words, the separation judgment means 62 monitors whether the value of the digital data output from the input processing means 3l is greater than or equal to a positive predetermined value t,, (0100)h or more Table 4 data is input (sample number N+ l 〉, the skin separation signal 34 is low until the fourth digital data (N+5) is manually input at that point or after.
Make it. The separation means 33 separates the digital data into a delay means for temporarily storing the digital data and the separation command according to the separation command sent from the separation signal means 62. The subsequent operation 1 is the same as the first embodiment, but the conclusion is as follows: In FIG. 4, when the value 1l of the acoustic signal exceeds the positive default value 12, the lower order Digital data 14 with 4 bits replaced with non-acoustic data is transmitted; otherwise, acoustic data l
3 is transmitted.

As described above, according to this embodiment, the following two advantages can be obtained by mixing non-acoustic data in the lower bits for a certain period of time from the time when the value of acoustic data exceeds a positive predetermined value. It will be done. First (above) By adjusting the number of bits to be replaced and the length of a certain period, non-acoustic data can be transmitted in preset units.

In this embodiment, non-acoustic data is transmitted in units of 16 bits. This makes it easy to handle non-acoustic data when actually transmitting it. By recording the data in a manner similar to that shown in FIG. Regarding the information recording and transmission method in which the value is an envelope and only positive default values are specified, the 7th is the 8th, the 9th is explained using Figure 1O, Table 5, and Table 6, but Figure 7 is in the main text. Figure 8 shows the principle of the information recording and transmitting method in the third embodiment of the invention. Figure 9 shows the acoustic data and envelope in the information recording and transmitting method of the third embodiment. An explanation showing the relationship between the lines is
FIG. 10 is a block diagram of the data receiving side in the third embodiment. In FIG. 7, 11, 12, l3,
75 is the envelope of the acoustic signal 11. In FIG. 81 is a first-in, first-out storage device that stores the audio data output from the analog-to-digital conversion means 2l and outputs it after a certain period of time. 82 is an analog delay device. Calculate the envelope of the acoustic data output from the digital conversion means 2I
This envelope calculation replacement instruction means outputs a replacement command to the replacement means 23 when audio data corresponding to a portion where the value of the envelope is equal to or greater than a positive predetermined value is output from the synchronization delay means 8.

In FIG. 9, the horizontal axis is the sample number, and the vertical axis is the enemy of the acoustic data. 9l is the positive default enemy. 92 is the envelope angle. 93 is the acoustic data of the sample number [N]. 94 is the sample number [N].
95 is the sample number [N+20]
] is the acoustic data.

In Figure 1O, for 31, 33, and 34, the first
Since this has been explained in the embodiment, the explanation will be omitted here. 1
01 is a synchronization delay device consisting of a first-in, first-out storage device that temporarily stores digital data output from the input processing means 31 and outputs it after a certain period of time; 102 is an input storage means 1;
Calculate the envelope of the digital data output from 01.
The envelope calculation separation instructing means outputs a separation command to the separation means 33 when the acoustic data corresponding to the portion where the value of the envelope is equal to or greater than a positive predetermined value is output from the synchronization delay means 101. The operation of the third embodiment will be explained using Figure 10 and Table 6. Here, the positive default value is (1000) h, and the acoustic data Assuming that the value of non-acoustic data to be replaced with the lower bit of is (F)h,
In addition, in this example, for the sake of simplicity, the envelope is defined as a straight line connecting data with two consecutive positive maximum values.Data with a maximum value has a larger absolute value than the two samples before and after. First, let me explain the data exit side.The analog-to-digital conversion means 21 performs the same operation as in the first embodiment.
Although 6-bit acoustic data is output, this acoustic data in Table 5 is input to the synchronization delay means 81 and the envelope calculation replacement instruction means 82.An example of the acoustic data is shown in FIG. 9 and Table 5. In Table 5, the data is sent to the analog-to-digital conversion means 2l in order from the smallest sample number.
The synchronization delay means 8 1 ! & Replacement means 2 delays the input acoustic data by a certain period of time, for example, 50 samples.
This delay (1) The timing at which the audio data is output from the analog-to-digital conversion means 21 and the time until the envelope calculation replacement instruction means 82 finishes determining whether to issue a replacement command for the data. This is done in order to absorb the deviation.Details<(Yo) As stated after explaining the operation of the envelope calculation replacement instruction means, the envelope calculation replacement instruction means 82 performs the following four processes. Performs processing to find data that has a positive value. This is Cyo. Three judgments are made: the force for which the data to be inspected has a positive value, the force that is greater than the previous input data, the force that is greater than the next input data. If everything is correct, even if the data has a positive maximum value, the sample number [N
+10] is the data to be inspected, this data has a positive value.It is larger than data 96 of sample number [N+9], larger than data 97 of sample number [N+11], and is larger than data 97 of sample number [N+10]. Even if it is determined that the data 94 has a positive local maximum value, the envelope equation is calculated secondly.

This is done by calculating the equation of a straight line connecting data with adjacent positive maximum values. In this example, even if the data 93 of sample number [N] and the data 94 of sample number [N+10] are data with adjacent positive maximum values, the equation of the straight line connecting them can be calculated as follows. In rectangular coordinates where the vertical axis is X1 and the horizontal axis is Y, where X is the sample number and Y is the data value, the envelope is at the coordinate (
N. (800)h) and (N+ .(A)h, (18
00) h). Here, in order to obtain the same calculation result on the data sending side and the data receiving side, only the upper 12 bits, which are replaced and the data does not change, are used (
By replacing the lower 4 bits with O) and calculating the envelope, the equation of the straight line passing through (xi, yl) and (x2, y2) is ζ, which is Y = (y2-yl)/(x2-xi)X+yl-(y2
-yl )/(x2-xi)xi...If the value above is expressed as a decimal number and substituted in the lth equation, Y=409.
6X+2048-409. This also corresponds to 92 in Figure 9.The envelope values corresponding to the sample numbers of each acoustic data calculated using this formula are shown in Table 5.The third sample of data to be replaced. When calculating the number, this {upper Substitute the sample number into the envelope equation obtained by the above process to find the value of the envelope 92 that corresponds to the sample number. This is the positive default value (1000) h91
This is done by checking whether or not the above is true. Positive default value (
1000) h91 or higher, the data with this sample number is the data to be replaced. In this example, from data 98 of sample number [N+5] to sample number [N
+10] up to data 94 corresponds to this.Fourthly, a replacement command is output for the data having the sample number to be replaced obtained in the previous process. This is done by setting the replacement signal 25 to low when the audio data of the corresponding sample number is output from the synchronization delay means 81. Synchronization of the acoustic data and the delay signal 25 at this time (above) The fact that the acoustic data is manually input to the envelope calculation replacement instruction means 82 and the synchronization delay means 8l at the same timing, and the amount of delay in the synchronization delay means 8l is This can be realized by the line calculation replacement instruction means 82 knowing and the envelope calculation replacement instruction means 82 knowing the sample number of the acoustic data to be replaced.
is the number of audio data output from the human processing means 2l, and the sample number of the input audio data is the sample number of the input audio data.By adding the delay time in the synchronization delay means 8l to the sample number of the input audio data, Synchronization delay means 8
I don't know the sample number of the acoustic data output from l.
For example, when data with sample number [N] is output from analog-to-digital conversion means 21, sample number of acoustic data output from synchronization delay means 8l is [N-
50] The envelope calculation replacement instruction means 82 can know that The sample numbers are compared and if they match, a replacement command is output.In the process up to this point, in order to determine whether or not to perform replacement on a piece of data, it is necessary to compare the data that comes after that data. I don't understand why it is necessary to wait.For example, to detect data with a positive maximum value, the value of the data input next to that data is required, and the lower bits of data that do not have a maximum value are replaced. Please, I don't understand unless data with a positive maximum value is input after that data. For this reason, analog-to-digital conversion means 2
Even if there is a time lag between the output of audio data from 1 and the determination of whether or not to replace that data, a synchronization delay means 81 is provided to absorb this.

Another way of looking at it 1'L Envelope calculation replacement instruction means 82
(Y) Processing from inputting audio data to determining whether or not to replace the data must be performed within the delay time of the synchronization delay means 8l.

Hereinafter, the replacing means 23 and the output processing means 24 operate in the same manner as in the first embodiment. Next, the operation on the data receiving side will be explained.

31 and 33 perform the same operations as in the first embodiment.

The synchronization delay means 101 operates in the same manner as the synchronization delay means 82 on the table data output side except that the input is digital data output from the input processing means 3l. The operation is similar to that of the envelope calculation replacement instruction means 83 except that the input data is digital data output from the input processing means 31 and that a separation command is sent to the separation means 33 instead of a replacement command. The digital data output from the Omotesaka input processing means 3l, the values corresponding to each digital data of the envelope calculated from this, and the sixth output from the separation means 33.
Show table data.

The envelope in this case is calculated as follows.

Envelope ('!) If the calculation result is the same on the data sending side and the data receiving side, it is calculated using the upper 12 bits of data that do not change even if the data is replaced.In other words,
△ Calculate the equation of a straight line connecting data with adjacent positive maximum values for the value in which the lower 4 bits of the digital data output from the human processing means 31 are replaced with 0. Digital data C friend sample number [N] and sample number [N+
10] coordinates (N, (800)h)
The equation of the straight line that passes through and (N+10, (1800)h) is Y=411. 1
X+2048-411. It is IN.

As a result, in Fig. 7, even when the value of the envelope 75 is greater than the positive default value 12, the digital data l4 in which the lower bits of the acoustic data are replaced with non-acoustic data is transmitted, and in other cases, the acoustic data l3 is transmitted. Even if it is transmitted, the auditory volume is expressed by the width of the acoustic signal l1, and the microscopic value of the acoustic signal 11 has no meaning.In other words, the value of the acoustic data obtained by analog-to-digital conversion of the acoustic signal is O. If the amplitude of the entire waveform of the acoustic signal is large, the loudness is large in terms of auditory perception, so by mixing non-acoustic data with the acoustic data of 0 mentioned above, L is not a problem in terms of auditory perception. According to the example, by replacing the lower bits of acoustic data with non-acoustic data, the following three advantages can be obtained: 7). One is that the influence on the acoustic signal can be reduced by mixing the acoustic data only in the portions with high audible volume. Second, by using envelope data as the compared value, data can be recorded continuously in areas with high volume, making it possible to transmit non-acoustic data in relatively large units. Third, since the period with and without noise lasts to some extent, the noise is less noticeable to the auditory sense.Next, as a fourth example, we use the compared value as the envelope and calculate the positive value. Regarding the information recording transmission method that specifies only default values, Section I
12 @ 13 will be explained using FIG. 14, but FIG. 11 shows the principle of the information recording and transmission method in the third embodiment of the present invention, and FIG. 12 shows the principle of the data sending side in the fourth embodiment. Block @ Figure 13 is an explanation showing the relationship between the envelope and the positive default value in the information recording and transmission method of the fourth embodiment. Figure 14 is a block diagram of the data receiving side in the fourth embodiment. In Fig. 11, 11, l2, 13, and l4 were explained in the first embodiment, and 75 was explained in the third embodiment, so the explanation will be omitted here. 1%Ji, 11
2 is a period in which no replacement is performed.

In FIG. 12, 21, 23, 24, and 25 are the first embodiment, and 81 has been explained in the third embodiment, so the explanation will be omitted here. Reference numeral 121 denotes an envelope calculation/replacement instruction means that performs the following three processes.First, it calculates the envelope of the acoustic data output from the analog-to-digital conversion means 2l. 2nd +,:. , monitor that the period in which the calculated envelope value is greater than or equal to the positive predetermined value continues for a predetermined time. 3rd {Top] If the audio data corresponding to the sustained portion is output from the synchronization delay means 101, a replacement command may be output to the replacement means 23 to replace the lower bits of the audio data with non-acoustic data. In Figure 13, the horizontal axis is the sample number and the vertical axis is the value of the envelope data. 131 is a positive default basket 132, 1
33, 136, 139 are enveloped souls 134, 137
, 138, l310 is a period f having the length of a predetermined time Ta.JL135 is a period obtained by excluding period 134 from the portion where the value of envelope 133 is greater than or equal to the positive predetermined value. Since the first embodiment F and 101 have been explained in the third embodiment, the explanation thereof will be omitted here.L 14l is an envelope calculation separation instruction means that performs the following three processes. The first process is to calculate the envelope of the digital data output from the input processing means 31, and the second process is to calculate the period during which the calculated envelope value is greater than or equal to a positive default value The third process is to monitor that the envelope value continues to be greater than or equal to a positive predetermined value for a predetermined time, and the acoustic data corresponding to this sustained part is used for synchronization. When output from the delay means 101, the separation means 23
A delay means for outputting and temporarily storing a separation instruction, and separating the separation instruction.

Hereinafter, the operation of the fourth embodiment will be explained using FIG. 14. The default value of Gensho here is (1000)h, and the value of the non-acoustic data to be replaced with the lower bit of the acoustic data is (F)h.Also, this embodiment is similar to the third embodiment for convenience. 2 consecutive
The envelope is defined by connecting data with two positive local maximum values with a straight line.First, let's explain the data sending side.421.
23, 24, 25, and 8l operate in the same manner as in the third embodiment. Therefore, here we will explain the operation of the remaining envelope calculation replacement instruction means 121.Envelope calculation replacement instruction means 12N& performs two processes: determining whether to replace or not, and sending out a replacement command.

Determination of whether to replace or not is performed as follows.

First, the envelope calculation replacement instruction means 121 (;L) manually inputs the acoustic data from the analog-to-digital conversion means 2l and calculates the envelope equation in the same manner as in the third embodiment. Determine whether there is a part greater than the positive default value. If there is no part greater than the positive default value, return to the previous process and calculate the next envelope. If there is a part greater than the positive default value. C-Yo This partial force intercourse Determine whether it will last longer than the specified time If it lasts longer than the specified time (
The sample number of the acoustic data that exists within this predetermined time is stored as the sample number of the data to be replaced, and the same process is repeated for the remaining periods longer than the positive predetermined value until they do not last longer than the predetermined time. If it does not last for more than a predetermined time, the next envelope is calculated in row 1, the period excluding the period during which replacement is performed from the part of the previous envelope that is greater than or equal to the positive predetermined value, and
It is determined whether the period including the period equal to or greater than the positive predetermined value of the next consecutive envelope lasts for a predetermined time or longer. Sustained transition The sample number of the acoustic data existing within this predetermined time is memorized as the sample number of the data to be replaced. Non-sustained transition Return to the initial process and repeat the same process.

The operations up to now will be explained with reference to FIG. 13. First, the envelope calculation/replacement instructing means 121 calculates the equation of the envelope l32, and determines whether there is a part where the equation is greater than or equal to the positive predetermined value 131. Since the envelope 132 does not have a portion larger than a positive predetermined value, the envelope calculation replacement instruction means 1 2 1 ? ;
L Discard the data of envelope 132 and move on to the next envelope 13
3 is calculated and it is determined whether there is a part that exceeds the positive predetermined value. However, this envelope 133 has a part that exceeds the predetermined value of distortion, so move on to the next ζ. In Figure 13, check whether the part that exceeds the predetermined value lasts for the predetermined time Ta.In the envelope 133, the part that exceeds the positive predetermined value lasts for the predetermined time Ta. The sample number of the data is stored as the sample number of the data to be replaced.Next, the envelope calculation replacement instruction means 121 (;L). Period 1 3 5 41 Default time T
Hiroshi shorter than a Envelope calculation replacement instruction means 1214; L
Calculate the formula for the following envelope 136 and period 13
5 and the continuous portion of the envelope 136 that is greater than or equal to a positive predetermined value, it is checked whether or not it continues for a predetermined period Ta or longer. Lasts for a long time 1
The sample number of the acoustic data existing within 37 is stored as the sample number of the data to be replaced, and the data of the envelope 133 is discarded. It is checked whether the removed portion lasts for a predetermined time Ta or more.

Since it persists, the sample number of the acoustic data existing within the sustained period 138 is stored as the sample number of the data to be replaced.Next, periods 137 and 138 are replaced from the portion of the envelope l36 that is greater than or equal to the positive default value. It is determined whether the portion excluding the period continues for a predetermined time Ta.

The non-persistent envelope calculation replacement instruction means 121 calculates the following equation for the envelope l39, and calculates the period 137 from the envelope 136.
, 138 and the continuous period longer than the positive predetermined value of the envelope l39, it is determined whether or not they last for a predetermined time Ta or more. Gen that doesn't last, period 13lO
It is determined that the acoustic data within the envelopes 136 and 139 are not to be replaced, and the data within the envelopes 136 and 139 are discarded. Next, return to the first process and calculate the envelope, and repeat the same operation.

When the replacement command is output from the synchronization delay means 81, the replacement signal 2 is output from the synchronization delay means 81.
This is done by setting 5 to low. Synchronization delay means 8
The synchronization ζ between the acoustic data output from the synchronous signal 8l and the synchronization signal 8l is realized in the same manner as in the third embodiment. Next, the data receiving side will be explained.
, I O 1 G Performs the same operation as the third embodiment Envelope calculation separation instruction means 141U The input data is digital data output from the input processing means 31, and the separation instruction is used instead of the replacement instruction. The separating means 33
In FIG. 11, the period in which the value of the envelope 75 is greater than or equal to the positive predetermined value l2 continues for more than the predetermined period Ta. 111, the digital data l4 in which the lower 4 bits of the acoustic data are replaced with non-acoustic data is transmitted, and even if the acoustic data l3 is transmitted at other times, even if the envelope value is greater than the positive default value of 12. According to this embodiment, the period in which the envelope value exceeds a positive predetermined value lasts for a predetermined time or more. In the case of fixed-length data, the following advantages can be obtained:
By recording the data only in the portion where the level of the audio signal is high for the recordable period, fixed length data can be transmitted while reducing the influence on the audio signal. In particular, when the volume suddenly becomes low, the latter half of the L fixed length data is not recorded in the low volume part, which can reduce the impact on the auditory sense.

Next, as a fifth embodiment, an information recording and transmission method in which the compared value is acoustic data and only positive default values are defined will be explained using FIG. 151K, 161u, and FIG. The principle of the information recording and transmission method in the fifth embodiment is as follows: FIG. 16 is a block diagram of the data sending side in the fifth embodiment R117 is a block diagram of the data receiving side in the fifth embodiment.

In Figure 15, 11, 12, 45, 46, 47
, 48 and 49 have been explained in the second embodiment, so their explanation will be omitted here. btsz friend synchronization pattern, 152
are non-acoustic data, and 151 and 152 form a data block. In FIG. 16, 21, 23, 24, 25,
52ζ was explained in the second embodiment.The explanation is omitted here. Reference numeral 161 denotes a synchronization pattern adding means for adding a synchronization pattern to the audio data; in FIG. is separation means 3
This is a synchronization pattern separation means that detects and separates synchronization patterns from the block-structured non-acoustic data output from 3.

The fifth embodiment will be described below using FIG. 15@16@17. Here, the positive default value is (100
0) h, non-acoustic data shall be ASCII code, which is a 1-byte character code representing the alphabet, &A
The SCII code consists essentially of 7 bits, the most significant bit is always 0. Also, let (FF)h be the synchronization pattern added to the audio data. (FF) h is ASCI
Regarding data that does not exist in the I code, first, the operation on the data sending side will be explained.

21, 23, 24, 52 (in the same way as in the second embodiment) However, in the second embodiment, the constant time was set as 4 samples.In this embodiment, the lO sample is set as a fixed time, The lower 4 bits of 10 samples of acoustic data are replaced with non-acoustic data from the time when the data value exceeds a positive predetermined value.Synchronization pattern addition means 1 6 1 (; When a certain length of non-acoustic data is input, a synchronization pattern is added to this non-acoustic data.In this embodiment, one synchronization pattern is added to 10 bytes of non-acoustic data. The non-acoustic data is converted into data with a block structure in which one block consists of 1 byte of synchronization pattern and 10 bytes of non-acoustic data, which is a total of 11 bytes. ) h or more,
A replacement command is issued to the replacement means 23 to perform replacement on the 10 samples of audio data. Upon receiving the replacement command, the replacement means 23 converts the block-structured non-acoustic data outputted from the synchronization pattern addition means 161 into a continuous one.
Even if it is replaced with the lower 4 bits of the 0 sample, the non-acoustic data C' transmitted by one replacement is C'! ．． ．． Since it is 5 bytes, one data block 1 is transmitted by replacing multiple lower bits. Therefore, the output processing means 24 performs the same operation as in the second embodiment, and then the data I will explain the operation of the receiving side.31.3
3, 34, and 62 operate in the same way as in the second embodiment.However, in the second embodiment, the constant time is 4 samples, whereas in this embodiment, 10 samples are the constant time, and if the acoustic data value is negative. 1 from the moment the value exceeds the default value
It is assumed that the lower 4 bits of the acoustic data of 0 samples are separated from the non-acoustic data. Synchronous pattern separating means 171 temporarily stores the non-acoustic data output from the separating means 33 (even if it is block structured on the data sending side). When the data L (FF)h is sent, it is assumed that a synchronization pattern is detected and one block of accumulated non-acoustic data is output.The value l1 of the acoustic signal is greater than the positive default value 12. Digital data is transmitted for a certain period of time from the time when T's skin is replaced with block-structured non-acoustic data 152 by adding a synchronization pattern 151 to the lower 4 bits of the acoustic data, and at other times the acoustic data is According to this embodiment, the non-acoustic data is transmitted only for a certain period of time from the time when the value of the acoustic data exceeds a positive predetermined value, thereby reducing the influence on the audio signal. It is possible to transmit non-acoustic data along with acoustic data, and by applying block structuring,
On the data receiving side, data can be output in units separated by synchronization patterns, and subsequent data handling can be done easily and reliably.

In the first, second, third, fourth, and fifth embodiments, if the number of bits of the acoustic data is 16 bits, any number of bits of data such as 20 bits or 8 bits may be used. In the first, second, third, fourth, and fifth embodiments, the number of bits used to replace acoustic data with non-acoustic data is 4 bits. Numbers are also good. 1st, 2nd, 3rd, 4th, 5th.
In the example above, the non-acoustic data sent by the data sending side can be retrieved without contradiction by the data receiving side (for example, (1000) h).
200) h (IFOO) h, etc. is good for any L% positive default value, if the number of bits of acoustic data is A, and the number of bits to be replaced with non-acoustic data is B, then
When expressed as a binary number, non-acoustic data can be separated without contradiction as long as it is expressed as (B11> bits or more and A bit or less) and the lower B bit is O.

Furthermore, in the first, second, third, and fourth embodiments, it is clear that the force length (with non-acoustic data as (F)h) may take any value.

Mana In the first, second, third, fourth, and fifth examples (friend
It is clear that only a negative default value or both positive and negative default values may be specified.

Also, in the first, second, third, fourth, and fifth embodiments (like
As a transmission path, anything that transmits digital data, such as a power support using a compact disk, such as an optical fiber cable, a coaxial cable, or a digital audio tape, can be used.
Anything is fine.

In the second embodiment, the period for replacing the lower bits of the audio data is set to 4 samples. For example, it can take any value such as 5 samples or 10 samples.

Mana: In the third and fourth examples (above), the envelope equation is set as a straight line passing through the data with two local maximum values. For example, 3.
Any line that connects the maximum values, such as a curve obtained by quadratic approximation of data with two adjacent maximum values, can be used. Envelope calculation replacement instructing means 82 and envelope calculation separation instructing means 102 respectively perform digital data output from the analog-to-digital converting means 2l and the input processing means 31 in which the delay time of the delay means 81 and 101 is 50 samples. If the length is longer than the time required for processing to output a replacement instruction and a separation instruction, for example, (any number such as 20 samples or 70 samples is acceptable).In the fifth embodiment, the synchronization pattern l5l of(
FF) A sword with h As long as it can be distinguished from other data sent as non-acoustic data, any enemy or number of bytes is acceptable. In the fifth embodiment, non-acoustic data is converted to ASCII.
Any digital data can be used as an I code.In the fifth embodiment, the force t is 10 samples as the period during which the lower bits of acoustic data are replaced with non-acoustic data, for example, 5 samples. , 15 samples, etc., can take any value.

In addition, in the fifth embodiment, the block size is set to 11
The strength of the bite can be any size, for example 20 bites or 7 bites.

Effects of the Invention As explained above, according to the present invention, non-acoustic data is recorded in the lower bits only when the absolute value of the acoustic data is large, or when the absolute value of the envelope data is large. It is possible to provide an information recording and transmission method that can secure a high S/N ratio at low volumes by mixing and transmitting non-acoustic data in the lower bits, and that can prevent noise from being reproduced during silent periods. Great practical effect remains

[Brief explanation of drawings]

FIG. 1 shows the principle of the information recording and transmission method in the first embodiment of the present invention. FIG. 2 shows the block diagram on the data sending side in the first embodiment. FIG. FIG. 4 shows the principle of the information recording and transmission method in the second embodiment of the present invention. FIG. 5 shows the blocks on the data sending side in the second embodiment.
Figure 7 shows the principle of the information recording and transmission method in the third embodiment of the present invention. Figure 8 shows the blocks on the data sending side in the first embodiment. 10 is an explanation showing the relationship between the acoustic data and the envelope in the third embodiment. FIG. 11 is an explanation of the blocks on the data receiving section side in the third embodiment. FIG. Transmission method principle 1st
Figure 2 shows the data sending block in the fourth embodiment. Figure 3 shows the relationship between the envelope and the positive default value in the fourth embodiment. Figure 14 shows the data reception in the fourth embodiment. Figure 15 shows the principle of the information recording and transmission method in the fifth embodiment of the present invention. Figure 16 shows the blocks on the data transmission side in the fifth embodiment.
Figure 7 shows the blocks on the data receiving section side in the fifth embodiment. Figure 18 shows the transmission signal format diagram in the conventional information recording transmission method. 1l... acoustic signal, 12... positive signal. Default t 13
...Date without replacing the lower bits 14...Date with replacement of the lower bits 22...Level detection ratio 3
2... Separation judgment means 52... Level judgment means,
62... Separation judgment already completed 75... Envelope 81...
・Delay hand ratio for synchronization 82...Envelope calculation replacement instruction hand &
, 101...Synchronization delay hand ¥j. 102...Envelope calculation separation instruction means, 121...Envelope calculation replacement instruction means, 141...Envelope calculation separation instruction means 19,1
51... Synchronous pattern, 161... Synchronous pattern addition notebook 171... Synchronous pattern separation hand ratio

Claims (11)

[Claims] (1) N-bit acoustic data is the compared value, and the acoustic An information recording and transmission method characterized in that lower A bits (A:A<N) of data are replaced with non-acoustic data and transmitted, and in other cases, the acoustic data is transmitted. (2) N-bit acoustic data is used as a compared value, and at least one of the time when the compared value becomes equal to or greater than a positive predetermined value, and the time when the compared value becomes equal to or less than a negative predetermined value. An information recording characterized in that the low-order A bits (A:A<N) of the audio data are replaced with non-acoustic data and transmitted for a certain period of time from a certain point in time, and the audio data is transmitted otherwise. Transmission method. (3) The information recording and transmitting method according to claim 1 or 2, wherein the compared value is envelope data of acoustic data. (4) When the envelope data of the N-bit acoustic data is the compared value, and the period A during which the compared value is greater than or equal to a positive predetermined value is greater than or equal to a predetermined time, and the compared value is a negative predetermined value. In at least one of the following cases where period B is longer than the predetermined time, the lower C bits (C:C<N) of the audio data are An information recording and transmitting method characterized by recording or transmitting the audio data in place of non-acoustic data, and recording or transmitting the audio data in other cases. (5) The information recording and transmitting method according to any one of claims 1, 2, 3, and 4, characterized in that the lower A bits are replaced with non-acoustic data that is block-structured by adding at least a synchronization pattern. (6) An information recording medium characterized in that the acoustic data and non-acoustic data are recorded by the information recording and transmitting method according to claim 1 or 2. (7) An information recording medium characterized in that the acoustic data and non-acoustic data are recorded by the information recording and transmitting method according to claim 3 or 4. (8) An information recording medium characterized in that the acoustic data and non-acoustic data are recorded using the information recording and transmitting method according to claim 5. (9) A reproducing means for reproducing the information recording medium according to claim 6 and outputting N-bit digital data; and a reproducing means for monitoring at least the upper bits of the digital data and separating it when non-acoustic data is recorded in the lower bits. An information recording medium drive apparatus comprising: a separation determining means for outputting a command; and a separating means for separating the digital data into audio data and non-acoustic data according to the separation command. (10) A reproducing means for reproducing the information recording medium according to claim 7 and outputting N-bit digital data; and a reproducing means for monitoring at least the upper bits of the digital data and separating it when non-acoustic data is recorded in the lower bits. separation determining means for outputting a command; delay means for temporarily storing the digital data output from the reproduction means; and separation means for separating the digital data output from the delay means into audio data and non-acoustic data in accordance with the separation command. An information recording medium drive device comprising: (11) A reproducing means for reproducing the information recording medium according to claim 8 and outputting N-bit digital data; and a reproducing means for monitoring at least the upper bits of the digital data and separating the information recording medium when non-acoustic data is recorded in the lower bits. separation determining means for outputting a command; separation means for separating digital data outputted from the delay means into acoustic data and block-structured non-acoustic data according to the separation instruction; and the block-structured non-acoustic data. 1. An information recording medium driving device comprising a synchronization pattern separating means for detecting and separating a synchronization pattern from the data and outputting non-acoustic data.