JPH0772881A - Karaoke equipment - Google Patents

Abstract

PURPOSE:To provide a KARAOKE (accompaniment to recorded music) device which automatically corrects an interval so that a user can easily sing a song without for him to set an interval changing value CONSTITUTION:Pitch of the singing signals recorded in KARAOKE media is detected by a first pitch detection means 104. Pitch of the user's singing signals inputted from a microphone 105 is detected by a second pitch detection means 107. These pitches are compared by a comparison means 108 and corresponding to the comparison results, output signals of the KARAOKE media are controlled with an interval conversion means controlling means 109 so that the signals are automatically interval converted, with an interval conversion means 110 and 111.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a karaoke apparatus using a medium in which accompaniment and model singing are recorded.

[0002]

2. Description of the Related Art In recent years, karaoke apparatuses have been equipped with various functions such as key control and addition of reverberation so that a user can easily sing a song.

A conventional karaoke apparatus having a key control function is disclosed in, for example, Japanese Patent Laid-Open No. 3-165484.
There is a bulletin "Karaoke device".

A conventional karaoke apparatus will be described below with reference to the drawings. In this conventional example, a case where a karaoke medium is a laser disk will be described. Current,
Most of the analog voices of laser disks commercially available for karaoke are of a voice multiplex system. On the audio multiplex disc, "accompaniment" is recorded on the analog left channel, and "accompaniment + song" is recorded on the analog right channel. Also,
Accompaniment is recorded in stereo in the digital sound of the laser disc of the sound multiplex system.

FIG. 5 is a block diagram showing the structure of a conventional karaoke apparatus. A laser disc reproducing device 101 as a karaoke media reproducing device reproduces a signal recorded on a laser disc. As explained earlier, in the audio multiplex type disc, "accompaniment" is applied to the analog left channel.
However, "accompaniment + song" is recorded on the analog right channel. Therefore, the singing signal separating means 102 extracts only the singing signal by subtracting the analog left channel signal from the analog right channel signal. The singing signal of the laser disk separated by the singing signal separating means 102 is converted into a digital signal by the A / D converter 103, and then processed by the first pitch detecting means 104 to become pitch data. Details of the processing of the pitch detecting means 104 will be described later.

On the other hand, the output signal of the microphone 105 converting the user's song into an electric signal is an A / D converter 106.
After being converted into a digital signal by, the signal is processed by the second pitch detecting means 107 and becomes pitch data.

The comparing means 108 compares the pitch data of the singing signal of the laser disk output from the first pitch detecting means 104 with the pitch data of the microphone input song output from the second pitch detecting means 107. To be done. The comparison method will be described later.

The pitch converting means 110 and 111 are L and L of the digital sound of the laser disk reproducing apparatus 101, respectively.
Input R channel. When the comparison result by the comparison means 108 indicates that the pitch of the song input by the microphone is lower than the pitch of the song recorded in the karaoke medium, the pitch is controlled to be lowered. vice versa,
When it is determined that the pitch of the song input by the microphone is high, the pitch converting means 110 and 111 control to raise the pitch.

The output signals of the pitch converting means 110 and 111 and the output signal of the A / D converter 106 are added by the adder 1 respectively.
12 and 113 are added, and D / A converters 114 and 115 are added.
After being converted into an analog signal by the output terminal 116, 1
It is output from 17.

In this conventional example, the pitch detecting means 104, 10
7, the pitch converting means 110 and 111, and the adders 112 and 113 by a digital signal processor (hereinafter referred to as DSP) 118, and the pitch detecting means 1
The remaining parts of 04 and 107 and the comparison means 108 are realized by a microcomputer (hereinafter, referred to as a microcomputer) 119. The DSP is, for example, LC83015.
(Manufactured by Sanyo Electric) can be used. LC83015
Has a ROM in which various signal processing programs are stored. This ROM also contains a pitch conversion program, and by processing an input signal with this program, pitch conversion can be performed. Also, the microcomputer is machine cycle 2
It may be an 8-bit one having a length of about 50 μsec.

Next, the first and second pitch detecting means 10
4, 107 will be described. A block diagram of the pitch detecting means is shown in FIG. The pitch detection device is composed of the DSP 118 and the microcomputer 119, as described above.

First, the processing shared by the DSP 118 of the pitch detecting means will be described. Bandpass filter 60
At 1, the frequency band component to be detected is extracted from the singing voice. The pass band of the band pass filter 601 is 50 Hz to 5 Hz.
It may be about 00 Hz.

Next, the low-pass filter 602 attenuates the harmonic components to relatively emphasize the fundamental wave. The cutoff frequency of the low-pass filter is about 100 Hz.

The amplitude detector 603 includes a bandpass filter 6
01 output is input and the signal rectified on one side is time constant 100
Hold in msec.

FIG. 7 is a PAD diagram showing a processing procedure of zero-cross detection / transmission in the conventional example. In this conventional example, the pitch detecting means 107 is assigned to Lch and 104 is assigned to Rch for processing.

In the zero-cross cycle detection 604, the zero-cross cycle counter is counted up for each sampling cycle (step 1), and the zero-cross point is judged depending on whether the sign of the current data and the data of the sample one sample before is the same (step 2). ). If it is a zero-cross point, it is determined whether or not the amplitude of the corresponding channel at that time is equal to or larger than the reference value (step 3). If the amplitude is equal to or greater than the reference value, the count value is judged to be a valid zero-cross cycle (the interval at which the signal crosses zero is represented by the sampling cycle), and this zero-cross cycle is output to the buffer (defined in the DSP user RAM). (Step 4). After that, the zero-cross cycle counter is reset (step 5). Zero cross detection is performed independently for L and R, but the processing is the same.

The SO register is a register for the DSP 118 to perform serial communication with the outside. DSP118
The SO register is not empty during data transfer. If the SO register is empty (step 6) and there is data in the output buffer (step 7), the data in the output buffer is S
It is transferred to the O register (step 8). The data set in the SO register is read by the clock from the microcomputer. After that, the sending buffer is cleared (step 9). After receiving the data, the microcomputer 119 performs the cycle detection process, and when this is completed, the next data can be received.

The above is the processing of which the DSP 118 is responsible for pitch detection. Next, the processing performed by the microcomputer 119 will be described.

The microcomputer 119 receives the zero-cross cycle from the DSP 118 and determines the cycle based on this.

As shown in FIG. 6, the period detection is performed by the following 4
It is composed of two parts (1) to (4). FIG. 9 shows the PAD of the procedure of the cycle detection process.

(1) Fundamental period (pr0) detection 605 FIG. 8 shows an example of the output waveform of the low pass filter 602. FIG. 8 shows an example of a waveform in the case where a zero cross remains due to the influence of the second harmonic on the output of the low pass filter. Figure 6
The process of detecting the basic period (pr0) from the zero-cross period (zc0) received from the DSP will be described with reference to FIG.

The microcomputer 119 receives the zero-cross cycle (zc0) from the DSP 118, compares it with the past three zero-cross cycles (zc2, zc4, zc6) in order, and if the ratio is within a certain ratio, the zero-cross cycle up to that point. To basic period (pr
0) is calculated.

The basic period detection algorithm will be described. First, the zero cross period (zc0) is transferred from the DSP 118 to the microcomputer 119. This processing is external interrupt processing on the microcomputer side. Zero cross cycle is 2c at a time
Although data for h is transferred, if only one channel has data, "0000" is transferred as a dummy to the channel having no data. If the data is "0000", the microcomputer does not perform cycle detection processing (step 1). When there is zero-cross data, first, the basic cycle detection flag (ZP) is temporarily set (step 2). Then, zc0 + zc1 as a candidate for the basic period (pr0)
Are examined (step 3). If a zero cross occurs only in the fundamental wave component, zc0 + zc1 is the fundamental period (pr
0). In this case, zc0 and zc2 are expected to have almost the same length, because they are components on the negative side of adjacent waveforms. However, in the case of the waveform in Fig. 8, zc0 and zc
Since the length of 2 is very different, the possibility that zc0 + zc1 is the fundamental period is denied (step 4).

Next, zc is selected as a candidate for the basic period (pr0).
Examine 0 + zc1 + zc2 + zc3 (step 5). Similar to the previous case, when comparing zc0 and zc4, they can be regarded as almost the same, so zc0 + zc1 + zc2 + zc as the basic period (pr0)
Adopt 3 (step 6). If zc0 and zc4 are also significantly different, zc0 + zc1 + zc2 + zc3 + zc4 + zc5 is used as a candidate (step 7) and zc0 and zc6 are compared (step 8). If the comparison result is also significantly different, it is determined that the basic period (pr0) cannot be detected, and the basic period detection flag (ZP) is reset (step 9).

(2) Average period detection 606 The detected basic period (pr0) is compared with the three previously detected basic periods (pr1 to 3), and whether or not all of these ratios are within a certain ratio Erroneous extraction is determined. If there is no erroneous extraction, these four basic cycles are averaged to obtain the average cycle (apr0). The processing up to this point is performed each time the zero-cross cycle is received.

The average period detection processing corresponds to step 10 and subsequent steps of the PAD shown in FIG. First, it is determined by the basic cycle detection flag whether or not the basic cycle is detected in the current zero-cross cycle reception (step 10). When the basic period is detected, the basic period buffer is shifted (step 11). That is, the basic cycle pr detected in the past
0 to 2 are sequentially shifted to pr1 to 3, and the latest basic cycle is set to pr0. Then, the latest basic cycle (pr0) and the past three basic cycles (pr1 to pr3) are sequentially compared (steps 12 to 1).
4). If these ratios are within a certain ratio, it is unlikely that the detected basic cycle is an erroneous detection, so these basic cycles are regarded as valid and the average cycle is calculated (step 15). Finally, the average period detection flag is set (step 16).

(3) Average period sampling 607 The microcomputer checks whether the average period detection flag is set at regular time intervals (about 10 msec), and if it is set, samples the average period and resets the average period detection flag. To do. Then, the sampled average period (apr0) is compared with the previous average period (apr1), and if this ratio is within a certain ratio, this average period (apr0) is regarded as valid. If enabled, average period is buffered (ap
r1).

(4) Cent 'value conversion 608 If the average period is determined to be valid, the average period (apr
Calculate the frequency from 0) and convert it to the cent 'value. When the period is t [sec], the cent ′ value c is as shown in the following equation.

C = 1024 * log ² (t0 / t), t0 = 1/55 The conversion method uses a table of a format in which the cent ′ value is read using the average period as an index. In this table, when the average cycle is short, the interval between the cent 'values becomes large. Therefore, it is efficient to reduce the step size of the average cycle and increase the step size stepwise as the average cycle becomes longer.

The above is the description of the pitch detecting means 104 and 107. Next, the comparison means 108 will be described.

The pitch detecting means 104 and 107 detect the pitch of a singing voice at regular intervals (10 msec). However, there are cases where the pitch cannot be detected. Furthermore, the detected values are instantaneous values, and averaging to some extent makes the processing easier than directly comparing them. In this conventional example, only the data when both the pitch detecting means 104 and 107 detect the pitch are valid, and the data in the valid case are averaged eight times and used for the control of the pitch converting means 110 and 111.

The PAD of the processing procedure of the comparison means 108 is shown in FIG.
It shows in 0. First, it is determined whether both pitch detecting means 104 and 107 have detected pitch (step 1).
When both are detected, the detection result of the pitch detection means 104, that is, the pitch of the singing voice input from the microphone 105 is set in the variable acL for pitch accumulation, and the detection result of 107, that is, the pitch of the singing voice recorded in the laser disk is scR. To (step 2). Also, the counter variable i is incremented by 1 (step 3). Next, the counter variable i
Is reached (step 4). When the counter variable i reaches 8, averaging processing and determination are performed, and the pitch converting means 110 and 111 are controlled according to the determination result. First, scL is ⅛ and the average pitch nwc
Find L. Similarly, 1/8 · scR is set to nwcR (step 5). Then, scL, scR, i are cleared to 0 (step 6). When the pitch converting means 110 and 111 have already converted the pitch, the current pitch change value key [cent '] is added to nwcR to perform the correction (step 7). After that, nwcR is subtracted from nwcL to obtain the error keyerr of the pitch detection result.

The error keyerr is a cent 'value.
Therefore, if there is an error of 1 octave or more,
It will be 1024 or more. However, 1024 residual components of the error are effective as the pitch error. Furthermore, +51
2 [cent '] and -512 [cent'] actually have the same pitch. From the above, if the lower 10 bits of keyerr are treated as a 2's complement display, the pitch detection means 104, 1
The difference of 07 can be regarded as within a range of ± 512 [cent '].

The pitch converting means 110 and 111, which operate according to the comparison result of the comparing means 108, determine that the pitch of the song input by the microphone is lower than the pitch of the song recorded in the karaoke medium. The pitch converting means 110 and 111 control so as to lower the pitch. On the contrary, in the case of the determination result that the pitch of the song input by the microphone is high, the pitch converting means 110 and 111 control so as to raise the pitch.

For example, keyerr is the reference value KERMA
If it is larger than X (step 9), the pitch converting means 1
Increase the pitch change key of 10,111 (step 1
0), conversely, when the keyer is smaller than the reference value KERMIN (step 11), the pitch converting means 11 reduces the pitch change amount key (step 12).
Send to 0,111. It is suitable that KERMAX and KERMIN are each ± 50 [cent '], and the change width Δkey of each pitch change amount is about 5 [cent']. By setting the parameters as described above, it is possible to eliminate an instantaneous influence such as a timing deviation of the song, and to make the pitch change smooth so that the song can be easily sung.

[0036]

However, the conventional configuration as described above has a problem in that the control of the key controller may not converge depending on the habit of the user singing. For example, many users who do not have sufficient musical training sing a little lower than the accompaniment when they sing while listening to the accompaniment. On the other hand, some people sing a slightly higher pitch than the accompaniment as a technique for listening to the song well. When such a user sings a song with the karaoke apparatus shown in the conventional example, the key controller may continue to change in the direction of raising or lowering the key, which may make it difficult to sing.

In view of the above problems, it is an object of the present invention to provide a karaoke device which limits the pitch change range of the key controller to prevent the pitch of the accompaniment from continuing to change.

[0038]

In order to solve the above problems, a karaoke device of the present invention detects a karaoke media reproducing device for reproducing karaoke media and a pitch of a singing signal output by the karaoke media reproducing device. First pitch detecting means, a microphone for detecting a voice signal of a user, second pitch detecting means for detecting a pitch of an output signal of the microphone, and both outputs of the first and second pitch detecting means. The comparing means for comparing the signals with each other, the pitch converting means controlling means for inputting the comparison result of the comparing means, and the output signal of the karaoke media reproducing device are controlled by the output signal of the pitch converting means controlling means to change the pitch. And a adding means for adding the output signal of the pitch converting means and the output signal of the microphone.

Further, in the karaoke apparatus of the present invention, the karaoke media reproducing apparatus for reproducing the karaoke media, the singing signal separating means for separating the singing signal from the output signal of the karaoke media reproducing apparatus, and the singing signal separating means output. First pitch detecting means for detecting the pitch of the singing signal to be played, a microphone for detecting the user's voice signal, second pitch detecting means for detecting the pitch of the output signal of the microphone, and the first and the first pitch detecting means. Comparing means for comparing the output signals of the two pitch detecting means with each other, pitch converting means controlling means for inputting the comparison result of the comparing means, and output signal of the karaoke media reproducing device for outputting output signals of the pitch converting means controlling means. Pitch conversion means to control the pitch by changing with
It is characterized in that an adding means for adding the output signal of the pitch converting means and the output signal of the microphone is provided.

[0040]

[Operation] With the above configuration, the first singing karaoke
The pitch detecting means detects the pitch of the song recorded in the karaoke medium, and the second pitch detecting means detects the pitch of the song input to the microphone. When the output signals of the first pitch detection means and the second pitch detection means are compared by the comparison means, and the pitch of the song input to the microphone is higher or lower than the pitch of the song recorded in the karaoke medium. The pitch of the signal recorded in the karaoke medium is changed within a range limited in advance by the pitch converting means according to the degree.

Also, when only the singing voice is not recorded alone in the karaoke medium, the pitch can be changed in the same manner as above.

[0042]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing the structure of a karaoke apparatus according to the first embodiment of the present invention. A laser disc reproducing device 101 as a karaoke media reproducing device reproduces a signal recorded on a laser disc. Similar to the conventional example, the singing signal separating means 102 extracts only the singing signal by subtracting the analog left channel signal from the analog right channel signal. Singing signal separation means 10
The singing signal of the laser disc separated in 2 is converted into a digital signal by the A / D converter 103, and then processed by the first pitch detecting means 104 to become pitch data. Details of the processing of the pitch detecting means 104 are the same as those of the conventional example.

On the other hand, the output signal of the microphone 105 converting the user's song into an electric signal is the A / D converter 106.
After being converted into a digital signal by, the signal is processed by the second pitch detecting means 107 and becomes pitch data.

The comparing means 108 compares the pitch data of the singing signal of the laser disk output from the first pitch detecting means 104 with the pitch data of the microphone input song output from the second pitch detecting means 107. To be done. The comparison method is the same as in the conventional example. The comparison result is input to the pitch conversion means control means 109, and the pitch conversion means control means 109 sends a control signal corresponding to this result to the pitch conversion means 110, 111. Details of the control will be described later.

The pitch converting means 110 and 111 are L and L of digital audio of the laser disk reproducing apparatus 101, respectively.
Input R channel. Then, the operation of raising or lowering the pitch is executed according to the control signal.

The output signals of the pitch converting means 110 and 111 and the output signal of the A / D converter 106 are added by the adder 1 respectively.
12 and 113 are added, and D / A converters 114 and 115 are added.
After being converted into an analog signal by the output terminal 116, 1
It is output from 17.

In this embodiment, similarly to the conventional example, a part of the pitch detecting means 104, 107, the pitch converting means 110,
111 and the adders 112 and 113 to the DSP 118
The microcomputer 119 realizes the remaining parts of the pitch detecting means 104 and 107, the comparing means 108, and the pitch converting means controlling means 109, respectively.

Next, the pitch converting means controlling means 109 will be described. FIG. 2 is a PAD diagram for explaining the processing of the pitch converting means control means 109. 2 is a step 8 of the PAD diagram of the processing procedure of the comparing means 108 shown in FIG.
It replaces the subsequent processing. Comparison result keye
When rr is obtained (step 1), it is evaluated. ke
When yerr is larger than the reference value KERMAX (step 2), it is determined whether or not a value obtained by adding the change width Δkey to the current pitch change amount key of the pitch converting means 110 and 111 is smaller than the pitch change upper limit value KEYMAX. (Step 3). If it is small, the current pitch change amount k
The pitch conversion means 110 and 111 are controlled by using the value obtained by adding the change width Δkey to ey as the next pitch change amount (step 4). On the contrary, when the keyerr is smaller than the reference value KERMIN (step 5), the current pitch change amount k
It is determined whether or not a value obtained by subtracting the change width Δkey from ey is larger than the pitch change lower limit value KEYMIN (step 6). If it is larger, the pitch conversion means 110 and 111 are controlled by using the current pitch change amount key minus the change width Δkey as the next pitch change amount (step 7).
KERMAX and KERMIN are ± 50 [cen
t '], the change width Δkey of the pitch change amount per time is 5
[Cent '] degree is appropriate. By setting the parameters as described above, the pitch change can be made smooth, so that the song can be easily sung. The pitch change upper limit value KEYMAX and the pitch change lower limit value KEYMIN are, for example, ± with respect to the first pitch change value key0.
Set to about 300 [cent ']. The pitch change upper limit value KEYMAX and the pitch change lower limit value KEYMIN are also regulated by the change limit of the pitch converting means.

The above is the description of the pitch converting means controlling means. In the first embodiment, the pitch change upper limit value and the lower limit value are constants, but they may be set by the user.

As described above, according to the first embodiment of the present invention, the change range of the pitch changing means can be controlled by a relatively simple method.

The second embodiment of the present invention will be described below with reference to the drawings. The structure of the karaoke apparatus of the second embodiment of the present invention is the same as that of the first embodiment shown in FIG. Also,
The operation of each part except the pitch converting means control means 109 is also the first
It is similar to the embodiment of.

Next, the pitch conversion means control means 109 of the second embodiment will be described. FIG. 3 is a PAD diagram for explaining the processing of the pitch converting means control means 109 in the second embodiment. FIG. 3 shows the comparison means 10 shown in FIG.
The process after step 8 of the PAD diagram of the process procedure of 8 is replaced.

When the comparison result keyerr is obtained (step 1), this absolute value is divided by the constant SCL and the change width Δk.
ey (step 2). Since the keyer is represented by a two's complement, the absolute value can be obtained by taking the exclusive OR of the sign bit and each bit other than that and forcibly setting the sign bit to 0. Division is easy if right bit shift is used. A shift amount of about 6 to 10 bits is suitable. Next, the comparison result keyerr is evaluated. For example,
When the keyer is larger than the reference value KERMAX (step 3), it is determined whether or not the current pitch change amount key of the pitch converting means 110 and 111 plus the change width Δkey is smaller than the pitch change upper limit value KEYMAX. (Step 4). If it is small, the current pitch change amount key plus the change width Δkey is set as the next pitch change amount (step 5). If not, KE
Pitch conversion means 11 with YMAX as the next pitch change amount
Controls 0 and 111 (step 6). Conversely, keye
When rr is smaller than the reference value KERMIN (step 7), the change width Δkey is calculated from the current pitch change amount key.
Is subtracted from the pitch change lower limit value KEYMIN (step 8). If larger,
The current pitch change amount key minus the change width Δkey is set as the next pitch change amount (step 9). If not, KEYMIN is set as the next pitch change amount.
Controls the pitch converting means 110, 111 (step 1
0). KERMAX and KERMIN are ± 50 each
[Cent '] degree is appropriate. By setting the parameters as described above, the pitch change can be made smooth, so that the song can be easily sung. The pitch change upper limit value KEYMAX and the pitch change lower limit value KEYMIN are, for example, ± with respect to the first pitch change value key0.
Set to about 300 [cent ']. The pitch change upper limit value KEYMAX and the pitch change lower limit value KEYMIN are also regulated by the change limit of the pitch converting means.

The above is the description of the pitch converting means controlling means in the second embodiment. As described above, according to the second embodiment of the present invention, it is possible to control the pitch changing means at a speed corresponding to the pitch comparison result within a fixed change range.

The third embodiment of the present invention will be described below with reference to the drawings. The structure of the karaoke apparatus of the third embodiment of the present invention is the same as that of the first embodiment shown in FIG. Also,
The operation of each part except the pitch converting means control means 109 is also the first
It is similar to the embodiment of.

Next, the pitch conversion means control means 109 of the third embodiment will be described. FIG. 4 is a PAD diagram for explaining the processing of the pitch converting means controlling means 109 in the third embodiment. FIG. 4 shows the comparison means 10 shown in FIG.
The process after step 8 of the PAD diagram of the process procedure of 8 is replaced.

When the comparison result keyerr is obtained (step 1), the absolute value of the difference between the current pitch change amount key and the initial pitch change amount key0 is subtracted from the pitch change upper limit value KEYMAX, and this is set as a constant SCL. Then, this is set as the change width Δkey (step 2). By this operation, the pitch change width Δkey is large when the current pitch change value key is close to the pitch change initial value key0, and conversely, when the current pitch change value key is far from the pitch change initial value key0. Becomes smaller. Next, the comparison result ke
Evaluate yerr. For example, keyerr is the reference value K
If it is larger than ERMAX (step 3), the pitch change upper limit value KEYMA is obtained by adding the change width Δkey to the current pitch change amount key of the pitch converting means 110, 111.
It is determined whether it is smaller than X (step 4). If it is small, the change width Δkey is added to the current pitch change amount key.
Then, the pitch conversion means 110 and 111 are controlled with the addition of the above as the next pitch change amount (step 5). Conversely, ke
If yerr is smaller than the reference value KERMIN (step 6), the change width Δk from the current pitch change key.
It is determined whether or not the value obtained by subtracting ey is larger than the pitch change lower limit value KEYMIN (step 7). When the pitch is large, the pitch conversion means 11 calculates the next pitch change amount by subtracting the change width Δkey from the current pitch change amount key.
Controls 0 and 111 (step 8). KERMAX,
KERMIN is preferably about ± 50 [cent ']. By setting the parameters as described above, the pitch change can be made smooth, so that the song can be easily sung. The pitch change upper limit value KEYMAX and the pitch change lower limit value KEYMIN are set to, for example, about ± 300 [cent '] around the first pitch change value key0. The pitch change upper limit value KEYMAX and the pitch change lower limit value KEYMIN are also regulated by the change limit of the pitch converting means.

The above is the description of the pitch converting means controlling means in the third embodiment. As described above, according to the third embodiment of the present invention, the pitch changing means can be controlled quickly when the pitch change is close to the pitch change initial value within the constant change range, and slowly as the pitch changes. .

Various karaoke media are commercially available. In the present embodiment, the analog audio of the audio multiplex type laser disk is described as an example, but in addition to this, a normal stereo-recorded compact disk, a compact tape, an audio multiplex karaoke type compact disk,
There are karaoke media such as compact tapes.

There is also a karaoke apparatus which can take out only the accompaniment sound to make karaoke by canceling the in-phase component of the sound band of the left channel and the right channel by using a normal stereo-recorded compact disc (or compact tape). is there. In such a case, the singing signal separating means 102 can extract the singing signal by adding the components of the audio bands of the left channel and the right channel.

In the audio multiplex karaoke compact disc and compact tape, an accompaniment signal is recorded in the left channel and a singing signal is recorded in the right channel. In the case of using such a voice multiplexed karaoke type compact disc or compact tape, the singing signal separating means 10 is used.
2 is unnecessary.

[0063]

As described above, according to the present invention, the pitch of the singing signal recorded in the karaoke medium and the pitch of the singing signal of the user input from the microphone are detected by the first and second pitch detecting means. However, if these two signals are compared with each other and the pitches of these two signals are different, the pitch conversion means automatically controls the output signal of the karaoke medium within a limited range by the pitch conversion means under the control of the pitch conversion means control means. It has a practically excellent effect that the pitch can be converted into a pitch and the pitch can be easily corrected by the user.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a karaoke device according to first, second and third embodiments of the present invention.

FIG. 2 is a PAD diagram showing a processing procedure of a pitch converting means controlling means of the first embodiment.

FIG. 3 is a PAD diagram showing a processing procedure of a pitch converting means controlling means of the second embodiment.

FIG. 4 is a PAD diagram showing a processing procedure of a pitch converting means controlling means of the third embodiment.

FIG. 5 is a block diagram showing a configuration of a conventional karaoke device.

FIG. 6 is a block diagram showing an internal configuration example of first and second pitch detecting means in a conventional karaoke apparatus.

FIG. 7 Zero-cross detection in a conventional karaoke device
PAD diagram showing the sending procedure

FIG. 8 is a waveform diagram showing an example of the output of a low pass filter 602.

FIG. 9 is a PAD diagram showing a processing procedure of cycle detection in a conventional karaoke apparatus.

FIG. 10 is a PAD diagram showing a processing procedure of a comparison means in a conventional karaoke device.

[Explanation of symbols]

101 laser disk reproducing device (karaoke media reproducing device) 102 singing signal separating means 103, 106 A / D converter 104, 107 first and second pitch detecting means 105 microphone 108 comparing means 109 pitch converting means controlling means 110, 111 Pitch conversion means 112,113 Addition means 114,115 D / A converters 116,117 Output terminals 118 Digital signal processor (DSP) 119 Microcomputer 601 Bandpass filter 602 Low-pass filter 603 Amplitude detector 604 Zero-cross period Detection 605 Basic period detection 606 Average period detection 607 Average period sampling 608 center 'value conversion

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tatsuhiko Numamoto 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd.

Claims (5)

[Claims] 1. A karaoke media reproducing device for reproducing karaoke media, a first pitch detecting means for detecting a pitch of a singing signal output by the karaoke media reproducing device, and a microphone for detecting a voice signal of a user. Second pitch detecting means for detecting the pitch of the output signal of the microphone, comparing means for comparing both output signals of the first and second pitch detecting means, and a pitch for inputting the comparison result of the comparing means. A karaoke device provided with conversion means control means and pitch conversion means for changing the pitch by controlling the output signal of the karaoke media reproducing apparatus with the output signal of the pitch conversion means control means. 2. A karaoke media reproducing device for reproducing karaoke media, a singing signal separating device for separating a singing signal from an output signal of the karaoke media reproducing device, and a pitch of a singing signal outputted by the singing signal separating device. First pitch detecting means, a microphone for detecting a voice signal of a user, a second pitch detecting means for detecting a pitch of an output signal of the microphone, and outputs of the first and second pitch detecting means. A comparison means for comparing signals with each other, a pitch conversion means control means for inputting a comparison result of the comparison means, and an output signal of the karaoke media reproducing device is controlled by an output signal of the pitch conversion means control means to change the pitch. A karaoke device provided with a pitch converting means. 3. The pitch converting means controlling means controls to lower the pitch when the comparison result of the comparing means is low in pitch of the singing signal input from the microphone within the preset pitch control range, The karaoke apparatus according to claim 1 or 2, wherein the karaoke apparatus is configured to control so as to raise a pitch when a pitch of a singing signal input from a microphone is high. 4. The pitch converting means controlling means controls so as to lower the pitch when the comparison result of the comparing means is low in pitch of the singing signal inputted from the microphone, and the pitch of the singing signal inputted from the microphone is high. In this case, control is performed to raise the pitch, and if the difference between the pitch of the song input from the microphone and the pitch of the song recorded on the karaoke media is large, the pitch is changed more rapidly than if the difference is small. 2. The structure according to claim 1, wherein
Alternatively, the karaoke apparatus according to claim 2. 5. The pitch converting means controlling means controls to lower the pitch when the comparison result of the comparing means indicates that the pitch of the singing signal input from the microphone is low, and the pitch of the singing signal input from the microphone is high. In this case, the control is performed so as to raise the pitch, and the pitch change speed is reduced as the difference between the pitch change value and the pitch change initial value increases. Karaoke device.