JPH0432097A - Voice memory reproducing device - Google Patents

Abstract

PURPOSE:To obtain the voice memory reproducing device for detecting the maximum value of voice data in a short period of time by detecting the maximum value of the voice data of a voice memory by deciding the voice data of a bit unit. CONSTITUTION:The above device is provided with a voice memory 1 for recording digital voice data, a bit data reading means 12 for reading the digital voice data of the voice memory 1 at every bit, a bit data deciding means for deciding whether the digital voice data 14 read by the voice memory reading means 12 is '0' or '1' at every bit, and an address storage means 11 for storing an address of the voice data decided by the bit deciding means 9. That is, the voice data of the voice memory is read successively at every train extending from a high order bit to a low order bit. In such a way, the maximum value of the voice data can be detected quickly.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an audio memory reproducing apparatus for recording and reproducing digital audio data on an audio memory such as a semiconductor memory or a magnetic memory, or on an optical disk.

BACKGROUND OF THE INVENTION In recent years, in order to match the level of audio played back from an audio memory playback device to another audio recording device, there has been a need for a function to detect the maximum value of the audio recorded in the audio memory. It is becoming more and more common.

An example of the configuration of a conventional audio memory playback device is shown in FIG.

In FIG. 4, 1 is an audio memory in which digital audio data is recorded, 3 is an audio memory reading means for sending a specified address 8 to the audio memory 1 and reading audio data 2, and 4 is audio read by the audio memory reading means 3. audio data output means 5 for outputting data 2 to the DA converter 5;
is a DA that converts audio data 2 to analog audio data 6
Converter, 7 is an analog audio output terminal for outputting analog audio data 6, 16 is maximum value detection means for detecting the maximum value of the audio data 2 read by the audio memory reading means and sent one after another, 11 is maximum value detection means 16 is an address storage means for storing address 8 of audio data 2, which is the maximum address.

The operation of the conventional audio memory playback device configured as described above will be described below with reference to the flowchart shown in FIG.

FIG. 6 is a bitmap diagram of the audio memory, and the audio memory 1 is composed of n bits per word and m words.

The address 8 of one word stored in the audio data 2 is sent from the audio memory reading means 3 to the audio memory 1 where the audio was converted into digital audio data and recorded (step 4).
1). The voice memory 1 outputs one word of voice data 2 corresponding to the address 8, and the voice memory reading means 3 reads the one word of voice data 2 (step 42). The audio data output means 4 outputs one word of audio data 2 read by the audio memory reading means 3 (step 43).

The DA converter 5 converts one word of audio data 2 sent from the audio data output means 4 into an analog audio signal 6 (step 44). And analog audio output terminal 7
The analog audio signal 6 is output (step 45).

The maximum value detection means 16 first detects the sound data of the word X *= (an++ a2 + aah+ ”
'+ arlk) (k is an integer greater than or equal to 1, where k<m)
And, for the audio data X+ of the (k+1)th word, +++=(a++m+++++ for a2++++
+aa+i4+++...a.(k.1)) is determined (step 46). Store the address of the larger audio data in the address storage means 11 (
Step 47). This operation is repeated from k=1 to m-1 to find the maximum address of the audio data 2 in the audio memory 1 (step 48).

FIG. 7 is a diagram showing an example of bitmap data of an audio memory in which audio data is recorded in the 2'S complete format.

Audio of first word X+= (0,0,1,O,0,1,O,O) and second word X2=(1,0,1,1,0,1,1,0) Comparing the data sizes, the second word X2 is larger. Comparing the magnitudes of the second word X2 and the third word X3, the second word X2 is larger. Similarly, comparing sequentially, the second word X2 and the fourth word X- are the same as the second word X2 and the fifth word
Originally the fifth word X6 was the fifth word X6 and the sixth word X6 was the fifth word X6.
and the seventh word X7 means the fifth word X6, the fifth word X means the eighth word X8, the fifth word X also means,
Between the fifth word X6 and the ninth word X, the fifth word X6 is larger. As a result, it is determined that the word having the maximum value of the voice recorded in the voice memory of FIG. 6 is the fifth word.

Problems to be Solved by the Invention In such a conventional configuration, it is necessary to read all the audio data and make a detection judgment in order to determine the word with the maximum value of the audio data, which takes time. Ta.

The present invention has been made in view of the above problems, and an object of the present invention is to provide an audio memory playback device that detects the maximum value of audio data in a short time.

Means for Solving the Problems In order to achieve the above objects, the present invention provides an audio memory for recording digital audio data, a bit data reading means for reading the digital audio data in the audio memory bit by bit, and the audio memory reading device. The apparatus includes bit data determining means for determining whether each bit of digital audio data read by the means is O or 1, and address storage means for storing the address of the audio data determined by the bit determining means.

Effect of the Invention With the above-described configuration, the present invention detects the maximum value of the audio data in the audio memory by determining the bit-by-bit audio data.

Embodiment FIG. 1 is a block diagram showing the configuration of an audio memory playback device in an embodiment of the present invention.

In FIG. 1, 1 is an audio memory that records digital audio data, 3 is an audio memory reading means that sends a specified address 8 to the audio memory 1 and reads audio data 2, and 4 is the audio read by the audio memory reading means 3. audio data output means 5 for outputting data 2 to the DA converter 5;
is a DA that converts audio data 2 to analog audio data 6
Converter, 7 is an analog audio output terminal that outputs analog audio data 6, 12 is a bit data reading means for reading the audio data in the audio memory 1 bit by bit, 9 is an audio bit data read by the bit data reading means 12. 11 is an address storage means for storing the address of the audio bit data determined by the bit data determining means 9. 20 is an address incrementing means for incrementing the number of bits of the address.

The operation of the audio memory reproducing apparatus of the present invention configured as described above will be described below with reference to the flowcharts shown in FIGS. 2 and 3.

The bit map of the audio memory is the same as that of the conventional example (FIG. 6), and the audio memory 1 is composed of n columns and m rows. Furthermore, one word of speech is defined by n words in one horizontal line. Let an arbitrary address of voice memory 1 be h column and h row,
Represented by ahk. The audio data format is 2”S
It is complete.

First, the normal audio reproduction operation will be explained with reference to FIG.

The audio data 2 is stored in the audio memory 1 in which digital audio data is recorded from the audio memory reading means 3.
Send word address 8 (step 21). The voice memory 1 outputs one word of voice data 2 corresponding to the address 8, and the voice memory reading means 3 reads the one word of voice data 2 (step 22). Audio data output means 4
outputs one word of audio data 2 read by the audio memory reading means 3 (step 23). The DA converter 5 converts one word of audio data 2 sent from the audio data output means 4 into an analog audio signal 6 (step 2
4). Analog audio signal 6 from analog audio output terminal 7
is output (step 25).

Next, the maximum value detection operation will be explained with reference to FIG.

The bit data reading means 12 initializes the address column h=1.degree. in the address row=1 (step 40).

The bit data reading means 12 first writes an address 13 (a) in the first column (h=1) and first row (k=1) to the audio memory 1.
++) is sent (step 26). The audio memory 1 outputs the bit data 14 corresponding to the address 13, and the bit data reading means 12 reads the bit data 14 (step 27). The bit data reading means 12 sends the bit data 14 to the bit data determining means 9. The bit data determining means 9 determines whether the bit data 14 is O or 1 (step 28). The determination result 10 is sent to the address storage means 11. The address storage means 11 is the bit data determination means 9.
The result 10, that is, the address 13 when the bit data is 1, is stored (step 29). From then on, the first column (
Addresses 13 from the second row (k=2) to the mth row (k=m) of h=1) are sent to the audio memory 1, and the above operation is repeated (step 30).

The address storage means 11 stores the stored address 13
It is determined whether the number of is O (step 42).

Address 13 stored in address storage means 11
If the number of is O, address increment means 2
0 increments the number of address columns (step 41). When h is incremented, h=2. The bit data reading means 12 first reads the second column (
h=2), address 13 (a2) in the first row (k=1)
1) is sent (step 26). The audio memory 1 outputs the bit data 14 corresponding to the address 13, and the bit data reading means 12 reads the bit data 14 (step 27). The bit data reading means 12 reads bit data 1.
4 is sent to the bit data determining means 9. The bit data determining means 9 determines whether the bit data 14 is O or 1 (step 28).

The determination result 10 is sent to the address storage means 11. The address storage means 11 receives the result 10 from the bit data determination means 9.
．． That is, address 13 when the bit data is 1 is stored (step 29). After the second column, addresses 13 from the second row (k=2) to the mth row (k=m) of (h=2) are sent to the audio memory 1, and the above operation is repeated (step 30). The address storage means 11 increments the number of address columns until the number of stored addresses 13 becomes one or more (step 41).

Then, when the number of stored addresses 13 reaches 1, the address storage means 11 ends the maximum value detection operation of the audio data (step 31).

Next, if the number of stored addresses 13 is neither 0 nor 1, address increment means 20 increments the number of columns of addresses 19 stored in address storage means 11 (step 33). The incremented address 13 is sent to the audio memory 1 (step 34). The audio memory 1 outputs the bit data 14 corresponding to the address 13, and the bit data reading means 12 reads the bit data 14 (step 35). The bit data reading means 12 sends the bit data 14 to the bit data determining means 9. The bit data determining means 9 determines whether the bit data 14 is O or 1 (step 36). The determination result is sent to the address storage means 11. Address storage means 11
stores the address data 13 when the result 10 from the bit data determining means 9 is 1 (step 37). When the number of stored addresses 13 reaches 1, the address storage means 11 ends the maximum value detection operation of the audio data (step 38).

If the number of addresses 13 stored is not 1, the address increment means 20 increments the number of columns of addresses 19 stored in the address storage means 11 (step 33). The incremented address 13 is sent to the audio memory 1 (step 34). Audio memory 1 contains bit data 14 corresponding to address 13.
The bit data reading means 12 outputs bit data 1.
4 is read (step 35). The bit data reading means 12 sends the bit data 14 to the bit data determining means 9. The bit data determining means 9 determines whether the bit data 14 is 0 or 1 (step 36). The determination result is sent to the address storage means 11.

Address storage means 11 stores data 13 as the address when result 10 from bit data determination means 9 is 1 (step 37).

Thereafter, the last address obtained by repeating the same operation is the location indicating the maximum value of the audio.

FIG. 7 is a diagram showing an example of bitmap data of an audio memory in which audio data is recorded in the 2's complete format. The address where the bit in the first column is 1 is a12
There are 3 bits: +a+6+ate. The address where the data of the bit in the second column in the same row as these three bits is 1 is a2a. In other words, it can be easily calculated that the fifth line of the audio memory has the maximum audio value.

In the above embodiment, the audio data is assumed to be in a 2°S complete format, but similar effects can be obtained with other formats by slightly manipulating the bit determination method.

Effects of the Invention As described above, according to the present invention, the maximum value of the audio data can be quickly detected by sequentially reading the audio data in the audio memory column by column from the column of upper bits to the lower bits. Further, since the determination is made bit by bit, the circuit can be easily configured and high-speed processing is possible.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of an audio memory playback device in an embodiment of the present invention, FIGS. 2 and 3 are flowcharts showing the operation of the audio memory playback device in the same embodiment, and FIG. FIG. 5 is a flowchart showing the operation of the conventional example; FIG. 6 is a bitmap diagram of the audio memory; and FIG. It is a bitmap diagram showing an example of bitmap data. 1... Audio memory, 3... Audio memory reading means, 4... Audio data output means, 5... DA converter, 7... Analog audio. Output terminal, 9...
Bit data determining means, 11... Address storage means, 12... Bit data reading means, 16.
... Maximum value detection means, 20... Address increment means. Name of agent: Patent attorney Shigetaka Awano Figure 1 Figure ■ Figure l

Claims (1)

[Scope of Claims] An audio memory for recording digital audio data, a bit data reading means for reading the digital audio data in the audio memory bit by bit, and a bit data read by the audio memory reading means for reading the digital audio data bit by bit. 1. An audio memory playback device comprising: bit data determining means for determining whether the bit data is 1 or 1; and address storage means for storing an address of the audio data determined by the bit determining means.