KR100517887B1 - Karaoke scoring system, karaoke scoring method and storage medium - Google Patents

Abstract

The present invention relates to a karaoke scoring apparatus and method and a memory medium incorporating a program executable by a computer.

In the present invention, a wavelet transform of a song, a first accompaniment sound of a model, and a voice to be scored by a person who is to be scored together with a second accompaniment sound identical to the first accompaniment sound is performed. do. The frequency component of the wavelet transformed model sound signal and the corresponding frequency component of the scored sound information are compared with respect to the same frequency band to determine the degree of agreement. Grading for the grading target is made by the above-described decision.

Description

Karaoke scoring system, karaoke scoring method and storage medium

The present invention relates to a karaoke scoring apparatus, a karaoke scoring method, and a storage medium for evaluating a singer's singing power in a karaoke system.

Conventionally, this kind of karaoke scoring apparatus uses a model voice signal extracted from a signal reproduced from data stored in a storage medium such as a laser disc (LD), a compact disc (CD), or the like to obtain a pitch (interval) and a volume. And from the viewpoint of such a change, the karaoke system is used to compare the actual voice signal of the mantissa inputted by the micro, and to determine the degree of matching and to score the singer's singing power. Such a conventional system performs a process of extracting a model voice signal, extracting a tone from a model and a microphone by using a digital signal processor (DSP).

In particular, such a conventional karaoke scoring apparatus extracts a model voice signal from a digital sound signal passing through the DSP in accordance with a predetermined program or data, and extracts the tone of the extracted model voice signal and the voice signal from the microphone.

However, such a conventional karaoke scoring apparatus extracts the characteristics of the speech signal by extracting the speech signal, extracting the tones of the speech signal, detecting the same level, and performing such processing for each of the model speech signal and the microphone speech signal. This includes a large amount of computation performed by complex configurations and algorithms.

In addition, in such a conventional karaoke scoring apparatus, when the precision of the model voice signal is not sufficient, there is a problem that extraction of the model voice signal tone is not made correctly.

SUMMARY OF THE INVENTION An object of the present invention is to provide a karaoke scoring apparatus, a karaoke scoring method, and a storage medium in which the configuration is simple and the human being can evaluate the singing power based on the sense and approximate scoring.

According to the first invention, which is a means for achieving the above-described technical problem, in a karaoke scoring apparatus, a first converting means for wavelet transforming a model sound signal based on a song of a modeled person and a first accompaniment, and scoring Second conversion means for wavelet transforming a target acoustic signal based on the subject's song and a second accompaniment equal to the first accompaniment, and the degree of correspondence between the outputs of the first conversion means and the second conversion means; It is obtained for each of the same frequency band, and provides a karaoke scoring apparatus comprising a scoring means for obtaining a scoring value for the song of the grading target based on each obtained degree of concordance.

The wavelet transform for the audio signal or the audio signal becomes wider in the bandwidth of each sub-band signal as the same frequency band becomes larger, and thus it is easier to be determined in terms of its level. As a result, an algorithm for extracting the pitch of sound or voice is not necessary, thus simplifying the arrangement of the device. In addition, the method of dividing the bandwidth of the voice or sound is matched with the sense of hearing by the human ear, and thus, the effect of performing the same method as the scoring by the person is obtained.

According to a second invention for realizing the above-described technical problem, in a karaoke scoring apparatus, a first conversion means for wavelet transforming a model voice signal based on a song of a modeled person, and a scoring target voice based on a song of a scoring target A second conversion means for wavelet transforming the signal and a correspondence between the outputs of the first conversion means and the second conversion means are obtained for each same frequency band, and the scoring is performed based on the obtained correspondence degrees. It provides a karaoke scoring apparatus comprising a scoring means for obtaining a scoring value for the subject song.

According to a third invention for realizing the above technical problem, in a karaoke scoring apparatus, reproducing means for reading out and reproducing a model sound signal from a recording medium on which a model sound signal based on a song and an accompaniment of a modeled person is recorded and reproduced; First conversion means for wavelet transforming the modeled sound signal, model sound signal removing means for removing the model sound signal based on the song of the modeled person from the reproduced model sound signal, and extracting only the accompaniment sound signal; A singing voice converting means for inputting a singing voice of a scored subject and converting it into a scoring target voice signal, an acoustic signal only for accompaniment drawn by the voice signal removing means, and a scoring target voice signal converted by the singing voice converting means Mixing means for outputting a scored sound signal by mixing a wavelet, and second conversion number for wavelet transforming the outputted sound signal for scoring. And scoring means for obtaining a coincidence degree between the respective outputs of the first and second converting means in each same frequency band, and obtaining a score value for the song of the grading target based on the obtained correspondence degree. It provides a karaoke scoring apparatus comprising a.

According to a fourth invention for realizing the above-described technical problem, in a karaoke scoring apparatus, reproducing means for reading out and reproducing a model sound signal from a recording medium on which a model sound signal based on a singer's accompaniment and accompaniment of a modeled person is recorded, A model sound signal removing means for inputting the model sound signal and removing the model sound signal based on the song of the modeled person from the input signal, and extracting the sound signal only for accompaniment, and removing the model sound signal from the reproduced model sound signal. A model voice signal extracting means for subtracting the acoustic signal of only the accompaniment drawn by the means and extracting the model voice signal, a first converting means for wavelet converting the extracted model voice signal, and a singing voice of the scorer A singing voice converting means for converting the scored speech signal to a scored speech signal, and a second transform for wavelet transforming the converted scored speech signal. And scoring means for obtaining the coincidence between the respective outputs of the first and second converting means in each same frequency band, and for obtaining a scoring value for the song of the grading target based on the obtained correspondences. It provides a karaoke scoring apparatus comprising a.

According to a fifth invention for realizing the above technical problem, in a karaoke scoring apparatus, a model sound signal based on the singer and accompaniment of the modeled person is recorded in one channel, and the acoustic signal of the accompaniment is in the other channel. Playback means for reading out and reproducing the model sound signal and the accompaniment sound signal from each recording medium recorded in the recording medium; first conversion means for wavelet transforming the reproduced model sound signal; Inputting a song voice converting means for converting to a scored voice signal, a sound signal of the reproduced accompaniment, and a scored voice signal converted by the song voice converting means to output a scored sound signal; Of the target sound signal output means, the second conversion means for wavelet transforming the output target sound signal, and the first conversion means and the second conversion means. Seeking the degree of match between the output from the each of the same frequency band, on the basis of the respective degree of match calculated provides a karaoke scoring apparatus comprising a scoring means to obtain values for the scoring of the singing person scoring.

According to the sixth invention for realizing the above technical problem, in a karaoke scoring apparatus, a model sound signal based on the singer's song and accompaniment of the modeled person is recorded in one channel, and the acoustic signal of the accompaniment is in the other channel. Playback means for reading out and reproducing the model sound signal and the accompaniment sound signal from each channel from the recording medium recorded in the recording medium; and extracting the model sound signal by subtracting the reproduced acoustic signal only from the reproduced model sound signal. A model voice signal extracting means, first converting means for converting the extracted model voice signal into wavelet transform, and a song speech converting means for inputting a singing voice of a scoring target and converting it into a scoring target speech signal; The second conversion means for wavelet transforming the target audio signal and the correspondence between the respective outputs of the first conversion means and the second conversion means, respectively; Seeking in the same frequency band each, on the basis of the respective degree of match calculated provides a karaoke scoring apparatus comprising a scoring means to obtain values for the scoring of the singing person scoring.

On the other hand, preferably, the above-described wavelet transform is an orthogonal wavelet transform.

According to a seventh invention for realizing the above technical problem, in the karaoke scoring method, a) wavelet transforming a model sound signal based on a song and a first accompaniment of a modeled person; and b) a song of a scorer. And wavelet transforming a scored acoustic signal based on the same second accompaniment as the first accompaniment; and (c) between each frequency component of the wavelet transformed model acoustic signal and the wavelet transformed scored acoustic signal. And obtaining a score value for the song of the scorer based on each of the same frequency bands, wherein the degree of agreement between each frequency component is obtained for each same frequency band.

According to an eighth invention for realizing the above technical problem, in the karaoke scoring method, a) wavelet transforming a model voice signal based on a song of a modeled person; and b) scoring based on a song of a scorer. Wavelet transforming a target speech signal and c) obtaining a correspondence between each frequency component of the wavelet transformed model speech signal and each frequency component of the wavelet transformed scoring target audio signal at each same frequency band, And obtaining a scoring value for the song of the grading target based on the obtained degree of concordance with each other.

According to a ninth invention for realizing the above technical problem, in the karaoke scoring method, a) reading and reproducing a model sound signal from a recording medium on which a model sound signal based on a song and accompaniment of a modeled person is recorded; b) wavelet transforming the reproduced model sound signal; c) removing the model sound signal based on the singer's song from the reproduced model sound signal, and extracting an accompaniment only sound signal; d) scoring Converting a voice of a subject into a scored voice signal, e) mixing the extracted accompaniment sound signal with the converted scored voice signal and outputting a scored sound signal; f Wavelet transforming the output target acoustic signal and g) between the frequency component of the wavelet transformed model sound signal and the wavelet transformed sound target signal. Seeking a matching degree between each frequency component in each of the same frequency band, there is provided a karaoke scoring method comprising the step of obtaining the value of the scoring for the singing person scoring the basis of the respective degree of match calculated.

According to a tenth invention for realizing the above technical problem, in the karaoke scoring method, a) reading and reproducing a model sound signal from a recording medium on which a model sound signal based on a song and an accompaniment of a modeled person is recorded; b) inputting the reproduced model sound signal, and removing the model sound signal based on the singer's song based on the input signal from the input signal, and extracting only the accompaniment sound signal; c) accompaniment drawn from the reproduced model sound signal; Subtracting only the acoustic signal and extracting the model voice signal; d) converting the extracted model voice signal into a wavelet transform; and e) converting the voice of the scorer into a scored voice signal. And f) wavelet transforming the converted graded speech signal, and g) each frequency component of the wavelet transformed model speech signal and the wavelet transformed graded object. Obtaining a matching value for each of the same frequency bands with each frequency component, and obtaining a scoring value for the song of the scorer based on the obtained each matching degree. to provide.

According to the eleventh invention for realizing the above technical problem, in the karaoke scoring method, a) a model sound signal based on the singer and accompaniment of the modeled person is recorded in one channel, and the acoustic signal of the accompaniment is the other. Reading and reproducing a model sound signal and an accompaniment sound signal in each channel from a recording medium recorded on a channel of b), b) wavelet transforming the reproduced model sound signal, and c) singing a scorer's song. Converting an audio signal to a scored voice signal by inputting a voice; d) outputting a scored sound signal by adding the reproduced acoustic signal of the accompaniment and the converted scored voice signal; Wavelet transforming a scored acoustic signal and f) one between each frequency component of the wavelet transformed model sound signal and each frequency component of the wavelet transformed sound target signal. And obtaining a score value for each of the same frequency bands, and obtaining a score value for the song of the scorer based on each obtained degree of concordance.

According to the twelfth invention for realizing the above-described technical problem, in the karaoke scoring method, a) a model sound signal based on a song and an accompaniment of a modeled person is recorded in one channel, and the acoustic signal of only the accompaniment is in the other. Reading and reproducing a model sound signal and an accompaniment sound signal from each channel from a recording medium recorded in a channel of b), and b) subtracting the reproduced acoustic signal only from the reproduced model sound signal. Extracting a signal, c) wavelet transforming the extracted model voice signal, d) converting a voice of a scorer into a scored voice signal, and e) converting the scored voice signal; Wavelet transforming a speech signal; and f) one between each frequency component of the wavelet transformed model speech signal and each frequency component of the wavelet transformed scored speech signal. The method provides a karaoke scoring method comprising: obtaining a score for each same frequency band, and obtaining a score value for the song of the scorer based on each obtained match degree.

In addition, in another aspect of the present invention as a means for solving the above-described technical problem, the method described in the seventh to twelfth invention described above, each storage medium containing a program executable in a computer to provide.

Hereinafter, the configuration, operation and effects of the karaoke scoring apparatus, the karaoke scoring method, and the storage medium according to the present invention will be described with reference to the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 shows a schematic configuration of a karaoke system to which a karaoke scoring apparatus is applied according to a first embodiment of the present invention. This karaoke system is a karaoke scoring apparatus 1A according to a first embodiment of the present invention. And the karaoke scoring unit 2 is configured. Here, the karaoke scoring apparatus 1A is a digital model sound signal Vr + A consisting of a model sound signal Vr and an accompaniment signal A made on the basis of a model song stored in stereo on a compact disc (CD) 3. ) Can be entered. The left channel L of the model sound signal Vr + A reproduced from this CD is input to the left channel digital input terminal 4a and the right channel R is input to the right channel digital input terminal 4b. .

The karaoke scoring apparatus 1A is an analogue based on a first mixing circuit 5a and a voice removing section 6 connected to both input terminals 4a and 4b, and a singer's window which is a scoring target from the microphone 7; An analog input terminal (8) for inputting a target audio signal (Vm), an A / D converter (9) for converting an analog target audio signal (Vm) from the analog input terminal (8) into a digital signal, 2nd mixing circuit 5b connected to the audio | voice removal part 6 and the A / D converter 9, the 1st wavelet conversion part 10a connected to the 1st mixing circuit 5a, and 2nd mixing A second wavelet transform section 10b connected to the circuit 5b, a scoring section 11 for obtaining a scoring value based on outputs of the first wavelet transform section and the second wavelet transform section, and a scoring section ( And a display section 12, such as a CRT display, which is connected to 11) and displays the scoring value by the scoring section 11.

The karaoke signal processing section 2 includes an echo processing section 20 for applying echo to the output of the A / D converter 9, a karaoke signal processing section 21 for inputting the output of the voice removing section 6, and an echo processing section ( A third mixing circuit 22 that mixes the output of 20 and the output of the karaoke signal processing unit 21, and D which converts the output of the third mixing circuit 22 into an analog signal and outputs it to a sound system (not shown). A / A converter 23 is provided.

The first mixing circuit 5a of the karaoke scoring apparatus 1A mixes the left channel signal L and the right channel signal R of the model sound signal Vr + A reproduced from the CD, and this is the first wave. Output to the let transform unit 10a.

FIG. 2 is a block diagram showing the configuration of the voice removing unit 6 of the karaoke scoring apparatus 1A.

The voice removing unit 6 inputs the left channel signal L and the right channel signal R from each of the input terminals 4a and 4b, and receives the model voice signal Vr from the model sound signal Vr + A. It removes and outputs the music signal A of accompaniment only.

The voice removing unit 6 includes a high pass filter (HPF) 60a, a low pass filter (LPF) 61a and a multiplier 62a to which the left channel signal L reproduced from the CD 3 is input, respectively; A high pass filter (HPF) 60b, a low pass filter (LPF) 61b and a multiplier 62b to which the right channel signal R reproduced from the CD 3 is input, respectively, and two multipliers 62a and 62b. An adder 63 for adding the output of the < RTI ID = 0.0 >) < / RTI > and a left channel signal adder 64a for adding the left channel signal HPF 60a and the output of the LPF 61a with the output of the adder 63; A right channel signal adding adder 64b for adding the output of the channel signal HPF 60b and the output of the LPF 61b with the output of the adder 63 is provided.

The high pass filters (HPF) 60a and 60b pass high frequency components of, for example, 7 KHz or more among the left channel signal L and the right channel signal R reproduced from the CD 3. The low pass filter (LPF) 61a and 61b pass low frequency components of, for example, 100 Hz or less among the left channel signal L and the right channel signal R reproduced from the CD 3. In addition, the frequency characteristic of such a filter is not limited to this, and it is preferable that a voice signal (voice) is set so as to be removed as effectively as possible.

The multiplier 62a multiplies the left channel signal L reproduced from the CD 3 by a coefficient of +1, and the multiplier 62b multiplies the coefficient of -1 by the right channel signal L reproduced from the CD 3. To multiply.

In the voice removing unit 6 having such a configuration, the left channel signal L obtained by multiplying the +1 coefficient by the multiplier 62a for the left channel signal is multiplied by the coefficient of −1 by the multiplier 62b for the right channel signal. The added right channel signal R is added by the adder 63 and supplied to the adders 64a and 64b. The model audio signal Vr, which is centered, is canceled, and the accompaniment signal ( Only A) is obtained and this accompaniment signal is output to the rear end.

The second mixing circuit 5b mixes the digital accompaniment signal A from the speech removing unit 6 with the digital scoring sound signal Vm from the A / D converter 9, and the scoring sound signal It outputs to the 2nd wavelet conversion part 10b as (Vm + A).

3 is a block diagram showing the configuration of the first and second wavelet transform units 10a and 10b. In this case, since the first and second wavelet transform units are configured in the same form, only one example will be described.

The term "Wavelet Transform" is a mathematical definition that is formed by (1) stretching or compressing and (2) shifting a basic function (mother wavelet) interspersed in time and frequency. It is defined as a signal transformation performed based on a group of functions. In particular, when the basic function groups formed by stretching and shifting the basic functions are completely orthogonal to each other, this transformation is referred to as an "Orthogonal Wavelet Transform." To use this wavelet transform as hardware, it is possible to use a filter to use the shift of (2), and recursively use a filter having the same algorithm with respect to the expansion and contraction of (1).

The wavelet transform unit 10 (10a, 10b) shown in Fig. 3 realizes the wavelet transform, and in particular, the wavelet transform unit 10 divides the subdivided sub-band into orthogonal wavelet transform as a basic unit. Filter (100a), (100b), ... (100g), each sub-band filter is recursively connected to the low frequency signal output side of the previous filter, and the frequency band of the input signal to each filter The high frequency sub-band and the low frequency sub-band are divided into sub-bands, and the low frequency sub-band is subsequently sub-sampled into the high frequency sub-band and the low frequency sub-band, resulting in a plurality of frequency subband signals. Output to W1 to W7 and E7. Each two-divided sub-band filter 100 includes a highpass subsampling filter 101 and a lowpass subsampling filter 102, each of which is completely orthogonal to each other. . Such a filter 101, 102 may be a linear filter (QMF) that satisfies an essentially perfect orthogonal condition.

Fig. 3 shows an example of the arrangement of the wavelet converting section 10. Here, the original input signal is divided into eight frequency subs by using seven two-division sub-band filters 100a to 100b connected in turn. It is divided into bands.

From the high pass sub-sampling filter 101a to 101g of the seven stages, high pass signals (sub-band signals) W1 to W7 are outputted to the scoring unit 11, and the low pass sub-sampling filter of the seven stages configuration. From 102, a low pass signal (sub-band signal) E7 is output to the scoring unit 11. In this orthogonal wavelet transform, the same configuration (algorithm) can be used recursively, thus making the configuration (algorithm) very simple.

4 is a diagram illustrating frequency characteristics of an output signal of the wavelet transform unit 10.

As shown, the signals W1 to W7 output from the high pass sub-sampling filters 101a to 101g from the first to the seventh stages are respectively 2 KHz or more, 1 KHz or more and 2 KHz or less, 500 Hz or more and 1 KHz or less. , 250Hz or more and 500Hz or less, 125Hz or more and 250Hz or less, 62Hz or more and 125Hz or less, 31Hz or more and 63Hz or less, and the sub-band signal E7, which is the output of the low pass sub-sampling filter 102g of the seventh stage, is mainly a frequency component of 31Hz or less. Has In other words, by performing orthogonal wavelet transform, the frequency characteristics of the output signals from the first and second wavelet transform units 10a and 10b are obtained by a plurality of frequency bandwidths in which each output signal is determined by a sub-band signal. As the frequency band of the sub-band signal increases, the bandwidth of each sub-band signal becomes wider.

As will be described later, in the present embodiment, the degree of matching between the model signal and the microphone input signal determined in the same band is determined in each of the same frequency bands, and as the sub-band signal increases, the bandwidth of each sub-band signal increases. The output frequency characteristics of the first and second wavelet transform units 10a and 10b of N are identical to the pitch-frequency characteristics of the acoustic signal. That is, the comparison between the same frequency bands obtained by the orthogonal wavelet transform corresponds to the pitch comparison of music, not just the comparison between frequencies, and is consistent with human hearing characteristics comparison.

5 shows the configuration of the scoring unit 11. The scoring unit 11 determines the degree of agreement between the outputs of the first and second wavelet transform units 10a and 10b for each of the same frequency bands, and based on the degree of agreement obtained at this time, Determine the scoring value.

That is, the scoring unit 11 is an absolute value detection unit (ABS) 110a to 110h for detecting the absolute values of the signals W1 to W7 and E7 from the first wavelet transform unit 10a, and the second wavelet. Absolute value detection units (ABS) 111a to 111h for detecting the absolute values of the signals W1 to W7 and E7 from the conversion unit 10b, respectively, and outputs from the absolute value detection units (ABS) 110a to 110h, respectively. A smoothing unit (112a) to (112h) for smoothing the signal, a smoothing unit (113a) to (113h) for smoothing the output signal from each of the absolute value detection units (ABS) 111a to (111h), and a first A coincidence detection unit 114a for determining whether or not there is a match for each frequency band between the sub-band signal from the wavelet converter 10a and the sub-band signal from the second wavelet converter 10b. Each time 114h and each coincidence detection unit 114a to 114h detects a coincidence state between the sub-band signals, the number of times is counted. Is a counter (CNT) 115a to 115h, a normalizer 116a to 116h for normalizing the output signal from the counters (CNT) 115a to 115h, for example, from 0 to 1 range. A random number generator 200 for generating a random number, and multipliers 117a to 117h for multiplying the output signals of the normalizers 116a to 116h by the parameters a to h and the random number generator 200. A multiplier 117i for multiplying the parameter i by the output, an adder 118 for adding the outputs of the multipliers 117a to 117i, and a counter (CNT) 119 that counts the number of comparisons K performed. Doing. Also, the scoring unit 11 increases or decreases the increase / decrease value added or decreased by the increase / decrease value conversion unit 201 and increase / decrease value conversion unit 201 based on the addition value x output from the adder 118. A cumulative calculation unit 202 for cumulatively calculating the teeth y is provided. Thus, the accumulated value in this cumulative calculation unit 202 is output to the display unit 12 as the final scoring value of the karaoke singer.

The normalization unit 116 normalizes the output of the counter (CNT) 115 to 1 / K based on the comparison count K from the counter (CNT) 119.

The parameters a to h and i can be arbitrarily set or varied as a condition that satisfies the relation of which the sum is 1 by the parameter setting unit (not shown), thereby changing the criteria for scoring evaluation.

Next, the operation of the karaoke scoring apparatus 1A having the above configuration will be described.

First, a signal such as a model sound signal Vr + A, which is input to the karaoke scoring apparatus 1A, is inputted from the input terminals 4a, 4b, and 8 to the first and second wavelet converter 10a. The operation of the karaoke scoring apparatus 1A until reaching 10b will be described.

First, the digital model sound signal Vr + A reproduced from the CD 3 is input to the karaoke scoring apparatus 1A through two input terminals 4a and 4b. In addition, the voice signal Vm generated by the actual input of the target to be scored from the microphone 7 is input to the karaoke scoring apparatus 1A by the singing box of the scoring box.

The left channel signal L and the right channel signal R of the model sound signal Vr + A input to the input terminals 4a and 4b are mixed in the first mixing circuit 5a, and the first wavelet. The first wavelet converter 10a performs a wavelet transform on the model sound signal Vr + A and outputs the sub-band signals W1 to W7 and E7 to the scoring unit 11. .

In addition, the model sound signal Vr + A inputted to the input terminals 4a and 4b is removed by the voice removing unit 6, and the model sound signal Vr is removed. It is input to the second mixing circuit 5b. On the other hand, the scoring target sound signal Vm input to the analog input terminal 8 is digitally converted by the A / D converter 9 and input to the second mixing circuit 5b. The second mixing circuit 5b mixes the acoustic signal A only for the accompaniment from the speech removing unit 6 and the scoring target sound signal Vm from the A / D converter 9, and the scoring target sound signal ( Vm + A), and outputs it to the second wavelet transform section 10b. The second wavelet transform section 10b converts the scored sound signal Vm + A into a wavelet and sub-band signals W1 to W7 and E7. Is output to the scoring unit 11.

Next, the processing operation in the scoring unit will be described.

The sub-band signals W1 to W7 and E7 from the first wavelet transform unit 10a are first absolute valued in the absolute value detection units (ABS) 110a to 110h of the scoring unit 11, and then the result is smooth. Smoothing is performed in the processing units 112a to 112h. Each signal after the smoothing process is input to the coincidence detection unit 114a to 114h.

Further, the sub-band signals W1 to W7 and E7 from the second wavelet transform section 10b are first absolute valued by the absolute value detection units (ABS) 111a to 111h of the scoring unit 11, and the result is then obtained. Smoothing is performed in the smoothing processing units 113a to 113h. Each signal after the smoothing process is input to the coincidence detectors 114a to 114h in the same manner as the signal from the first wavelet converter 10a.

The coincidence detectors 114a to 114h are configured such that the signal transmitted from the first wavelet transform unit 10a and the corresponding signal transmitted from the second wavelet transform unit 10b axis coincide with each other in the same frequency band. Detect whether or not If it is detected that the two signals in the same frequency band coincide in the corresponding one of the coincidence detectors 114a through 114h, the related one for the specific frequency band of the counter (CNT) 115a through 115h is the signals. Count and record the number of occurrences of consensus. At this time, the count value as a result counted by each counter CNT is normalized as 1 / K by the normalization units 116a to 116h based on the comparison count K counted by the counter 119. This normalized value has a value of 0 to 1, for example, and is output to the multipliers 117a to 117h to multiply the parameters a to h. The multiplied value that is the output of these multipliers 117a to 117h is output to the adder 118.

On the other hand, any random number between 0 and 1 generated by the random number generator 200 is multiplied by the parameter i in the multiplier 117i and the adder 118 in the same form as the output signal from the multipliers 117a to 117h. Will be printed). In addition, the output of the random number from the random number generating unit 200 is for adding a human scoring element to the final scoring value, thereby making it possible to approximate the mechanical scoring to the human scoring in the conventional karaoke scoring apparatus. Will be. In addition, the parameters a to h and i can be arbitrarily set or changed by the parameter setting unit shown on the condition that the sum (1 + b + c + .... + i = 1) is satisfied. This makes it possible to change the scoring criteria.

The multipliers 117a to 117h and the multiplier values from the multiplier 117i output to the adder 118 are increased or decreased as the result value x (for example, 0 to 1) respectively added by the adder 118. Is sent out. The increase / decrease value conversion unit 201 has a plurality of conversion tables or calculation means, thereby determining the increase / decrease value y corresponding to the addition value x and output it to the accumulation unit 202. In addition, in the increase / decrease conversion unit 201, the change processing from the added value x to the increase / decrease value y can change the increase / decrease rate by providing a plurality of conversion tables or calculation means. It is possible.

The increase / decrease value y outputted from the increase / decrease value conversion unit 201 accumulates at an initial value (for example, 50 points) preset by the accumulating unit 202, and this "initial value + increase / decrease value y" is displayed on the display unit as the final scoring result. It is output to (12). In addition, the scoring result output to the display unit 12 may output not only the final scoring result but also the scoring value that changes every moment. As a result, the scoring target can confirm the intermediate score in the song.

According to the karaoke scoring apparatus 1A having the above-described configuration, the orthogonal wavelet transform output of the model sound signal Vr + A reproduced from the CD 3 and the scoring target sound signal Vm + A input from the microphone 7 are obtained. Since the orthogonal wavelet transform output of () is calculated for each same frequency band, an algorithm for extracting pitch is unnecessary and the configuration is simplified. In addition, since orthogonal wavelet transform is performed, scoring corresponding to human hearing can be performed.

Hereinafter, a second embodiment of the present invention will be described with reference to FIG. 6.

The karaoke scoring apparatus 1B according to the second embodiment of the present invention of FIG. 6 is similar to the first embodiment, with the left channel digital input terminal 4a, the right channel digital input terminal 4b, and the first and the same. Second mixing circuits 5a, 5b, voice removing section 6, analog input terminal 8, A / D converter 9, first wavelet converting section 10a and second Although the wavelet converting section 10b, the scoring section 11 and the display section 12 are provided, the connection relationship is different from that of the first embodiment.

In particular, this karaoke scoring apparatus 1B is provided with an adder 13 for adding the signal which changed the code | symbol of the output signal of the 1st mixing circuit 5a, and the output signal of the 2nd mixing circuit 5b, and this adder The output of (13) is an input of the first wavelet converter 10a, and the A / D converter 9 is an input of the second wavelet converter 10b.

Next, the operation of the karaoke scoring apparatus 1B according to the second embodiment will be described. In the following description, portions that overlap with the above-described first embodiment will be omitted.

First, as in the first embodiment, digital model sound signals Vr + A are input to two digital input terminals 4a and 4b. At the same time, the analogue target audio signal Vm is input to the analog input terminal 8.

The left channel signal L and the right channel signal R of the model sound signal Vr + A input to the two input terminals 4a and 4b are mixed by the first mixing circuit 5a. At the same time, the model sound signal Vr + A, which is input to the two input terminals 4a and 4b, is removed by the sound removing unit 6, and the acoustic signal A of the accompaniment only is second mixed. It is output to the circuit 5b. The second mixing circuit 5b mixes the left and right signals of the acoustic signal A only for the accompaniment from the voice removing section 6 and outputs them to the adder 13. The adder 13 adds the model sound signal Vr + A from the first mixing circuit 5a and the acoustic signal A only from the accompaniment from the second mixing circuit 5b with the signal inverted signal to model sound. The signal Vr is input to the first wavelet converter 10a. The first wavelet converter 10a converts the model voice signal Vr into a wavelet transform and outputs the sub-band signals W1 to W7 and E7 to the scoring unit 11.

On the other hand, the scoring target audio signal Vm input to the analog input terminal 8 is converted into a digital signal by the A / D converter 9 and input to the second wavelet converter 10b. The second wavelet converter 10b performs wavelet transform on the scored voice signal Vm and outputs the sub-band signals W1 to W7 and E7 to the scoring unit 11.

The marking section 11 is a sub-band signal W1 to W7 and E7 from the first wavelet transform section 10a and a corresponding sub-band signal W1 to W7 and E7 from the second wavelet transform section 10b, respectively. The degree of coincidence is determined, and the score value of the singer is obtained based on the degree of coincidence, and displayed on the display unit 12.

According to the karaoke scoring apparatus 1B of the second embodiment described above, the scoring target audio signal based on the orthogonal wavelet transform output of the model voice signal Vr reproduced from the CD 3 based on the signal input from the microphone 7. Since the degree of concordance between the orthogonal wavelet transform output of (Vm) and the same frequency band is obtained, the same effect as in the first embodiment is obtained.

Figure 7 shows a third embodiment of a karaoke scoring apparatus according to the present invention.

The karaoke scoring apparatus 1C according to the third embodiment includes a left channel analog input terminal 15a and a right channel analog input terminal 15b for inputting an analog signal reproduced from the laser disk (L / D) 14; A / D converter 16a for converting an analog input signal from the left channel analog input terminal 15a into a digital signal, and an analog input terminal for inputting an analog scoring target audio signal Vm from the microphone 7 ( 8), an adder 17 which adds an analog signal from the analog input terminal 8 and an analog signal from the right channel analog input terminal 15b, and converts the analog signal from the adder 17 into a digital signal. A / D converter 16b, first wavelet converter 10a connected to A / D converter 16a, and second wavelet converter 10b and first connected to A / D converter 16b. The display part 12 of the same form as the scoring part of 1 Example is provided. It is configured to.

The analog audio channel of the laser disc (LD) 14 records a model sound signal Vr + A in the left channel based on the singer and accompaniment of the modeled person, and the acoustic signal A of the accompaniment sound in the right channel. Is recorded.

Next, the operation of the karaoke scoring apparatus 1C having the above-described configuration will be described.

First, analog model sound signal Vr + A is inputted to the left channel analog input terminal 15a by reproducing the laser disk (LD) 14, and analog sound only for accompaniment is input to the right channel analog input terminal 15b. Signal A is input. The analog scoring object audio signal Vm is input from the microphone 7 to the analog input terminal 8 by the actual singing of the scoring subject.

The analog model sound signal Vr + A input to the left channel analog input terminal 15a is digitally converted by the A / D converter 16a and input to the first wavelet converter 10a. The first wavelet converter 10a converts the model sound signal Vr + A into a wavelet transform and outputs the sub-band signals W1 to W7 and E7 to the scoring unit 11.

On the other hand, the acoustic signal A only for the accompaniment inputted to the right channel analog input terminal 15b and the scoring target audio signal Vm inputted to the analog input terminal 8 are added by the adder 17, and the scoring target sound is added. The signal Vm + A is input to the A / D converter 16b. The A / D converter 16b converts the scoring target sound signal Vm + A from an analog signal to a digital signal and inputs the resultant digital signal to the second wavelet converter 10b. The second wavelet converter 10b performs wavelet transform on the scoring target sound signal Vm + A and outputs the sub-band signals W1 to W7 and E7 to the scoring unit 11. The scoring unit 11 is a sub-band signal W1 to W7 and E7 signal from the first wavelet transform unit 10a and each corresponding sub-band signal W1 to W7 from the second wavelet transform unit 10b and The degree of coincidence is judged between E7, a scoring value is calculated based on the result, and the scoring result is output to the display unit 12.

According to the karaoke scoring apparatus 1C according to the third embodiment as described above, the orthogonal wavelet conversion result of the model sound signal Vr + A reproduced from the laser disk (LD) 14 and the microphone 7 are obtained. Comparing the results of the orthogonal wavelet transform of the scored acoustic signal (Vm + A) based on the input from each of the same frequency bands to obtain a degree of agreement. Thus, the same effects as in the above-described first embodiment are obtained.

8 is a diagram showing a karaoke scoring apparatus according to a fourth embodiment of the present invention.

The karaoke scoring apparatus 1D, which is the fourth embodiment of the present invention, is similar to the third embodiment and has a left channel analog input terminal 15a, a right channel analog input terminal 15b, an A / D converter 16a, 16b, the analog input terminal 8, the first and second wavelet converters 10a and 10b, the scoring unit 11 and the display unit 12. However, the form of the connection between each component is different from that of the third embodiment described above.

That is, this karaoke scoring apparatus 1D codes the model sound signal Vr + A from the left channel analog input terminal 15a and the acoustic signal A only for the accompaniment from the right channel analog input terminal 15b. An adder 18 for adding the converted signal, the first wavelet converting section 10a connected to the adder 18 via an A / D converter 16a, and an analog input terminal 8; The second wavelet converter 10b is connected to the A / D converter 16b.

Next, the operation of the karaoke scoring apparatus 1D according to the fourth embodiment of the above-described configuration will be described.

First, similarly to the third embodiment, the analog model sound signal Vr + A is input to the left channel analog input terminal 15a, and the sound signal only of analog accompaniment is input to the right channel analog input terminal 15b. A) is input. In addition, an analog scoring target audio signal Vm is input to the analog input terminal 8.

The adder 18 performs a code conversion of the model sound signal Vr + A inputted to the left channel analog input terminal 15a and the acoustic signal A only for the accompaniment inputted to the right channel analog input terminal 15b. And add to obtain the model voice signal Vr and input it to the A / D converter 16a. The A / D converter 16a converts the model voice signal Vr from analog to digital and inputs it to the first wavelet converter 10a. The first wavelet converter 10a performs a wavelet transform on the model voice signal Vr and outputs the sub-band signals W1 to W7 and E7 to the scoring unit.

On the other hand, the scoring target audio signal Vm input to the analog input terminal 8 is converted into a digital signal by the A / D converter 16h and input to the second wavelet converter 10b. The second wavelet converter 10b performs wavelet transform on the scored audio signal Vm to obtain the sub-band signals W1 to W7 and E7, and outputs the result to the scoring unit 11.

The scoring unit 11 is a sub-band signal W1 to W7 and E7 signal from the first wavelet transform unit 10a and each corresponding sub-band signal W1 to W7 from the second wavelet transform unit 10b and The degree of coincidence is judged between E7, a scoring value is calculated based on the result, and the scoring result is output to the display unit 12.

According to the karaoke scoring apparatus 1D according to the fourth embodiment as described above, the orthogonal wavelet conversion result of the model audio signal Vr reproduced from the laser disk (LD) 14 and from the microphone 7 are obtained. Comparing the results of the orthogonal wavelet transform of the scored speech signal (Vm) based on the input for each of the same frequency bands, the degree of agreement is obtained. Thus, the same effects as in the above-described first embodiment are obtained.

On the other hand, the present invention is not limited to the four embodiments described above, various modifications are possible.

For example, the band division in the above-described wavelet transform is not limited to eight bands, and it is also possible to increase or decrease the number.

Incidentally, in the above-described first to fourth embodiments, the present invention is realized only by hardware using only the karaoke scoring apparatus. However, the present invention is not limited to this and can be implemented by general-purpose apparatuses such as a personal computer. Moreover, of course, the present invention can be easily implemented as software rather than hardware.

That is, the storage medium on which the program of the software for realizing the functions of the above-described embodiments is supplied to the system or the device, and the computer (CPU or MPU) of the system or the device reads and executes the program recorded on the storage medium. Needless to say, the object of the present invention can also be achieved.

In this case, the program itself read out from the storage medium realizes the new function of the present invention, and the storage medium storing the program becomes the configuration of the present invention.

As a recording medium for supplying a program, a floppy disk, a hard disk, an optical disk, a magneto-optic disk, a CD-ROM, a CD-R, a magnetic tape, a nonvolatile memory card, a ROM, or the like can be used. The program may also be provided by another MIDI device, server-computer, or the like via a communication network or the like.

Furthermore, not only the function according to the above embodiment is realized by executing a program read by the computer, but also an OS or the like running on the computer performs part or all of the actual processing based on the instruction of the program. It goes without saying that the process also includes a case where the functions of the above-described embodiments are realized.

Furthermore, after the program read from the storage medium is stored in the memory included in the function expansion board inserted into the computer and the function expansion unit connected to the computer, the function expansion board and the function expansion based on the instruction of the program. The CPU or the like having a unit for performing some or all of the actual processing, and the above-described functions are realized by the processing are also included in the scope of the present invention described above.

By providing a karaoke scoring apparatus, a karaoke scoring method, and a storage medium operating in the above-described configuration, the configuration is simple, and it is possible to perform scoring similar to the evaluation method of singing power performed by the human sense.

1 is a block diagram showing a schematic configuration of a karaoke system to which a karaoke scoring apparatus according to a first embodiment of the present invention is applied;

2 is a diagram illustrating a configuration of a voice removing unit of the karaoke scoring apparatus according to FIG. 1;

3 is a view showing the configuration of one of the two wavelet (Wavelet) converting portion of the karaoke scoring apparatus according to FIG.

4 is a graph showing the frequency characteristics of the transform signal of the wavelet transform unit of FIG.

5 is a view showing the configuration of the scoring unit of FIG.

6 is a view showing the configuration of a karaoke scoring apparatus according to a second embodiment of the present invention;

7 is a diagram showing the configuration of a karaoke scoring apparatus according to a third embodiment of the present invention;

8 is a diagram showing the configuration of a karaoke scoring apparatus according to a fourth embodiment of the present invention;

<Description of the symbols on the main parts of the drawings>

3: CD 4a: Left channel digital input terminal

4b: Right channel digital input terminal 7: Microphone

8: Analog input terminal Vr + A: Model sound signal

Vr: Model Audio Signal A: Accompaniment Signal

Vm: Voice signal to be scored Vm + A: Sound signal to be scored

Claims (15)

A karaoke scoring apparatus comprising: reproducing means for reading out and reproducing a model sound signal from a recording medium on which a model sound signal based on a song and accompaniment of a modeled person is recorded; First conversion means for wavelet transforming the reproduced model sound signal; Model sound signal removing means for removing a model sound signal based on the singer of the modeled person from the reproduced model sound signal and extracting an acoustic signal of only accompaniment; A singing voice converting means for inputting the singing voice of the scoring target and converting the singing voice into a scoring target speech signal; Mixing means for mixing the acoustic signal of only the accompaniment drawn by the model speech signal removing means and the scoring target audio signal converted by the singing voice converting means to output a scoring target sound signal; Second conversion means for wavelet transforming the scoring target sound signal; And Scoring means for obtaining a coincidence between the outputs of the first and second converting means in each of the same frequency bands, and obtaining a scoring value for the song of the grading target based on the obtained correspondences; Karaoke scoring apparatus characterized in that. A karaoke scoring apparatus comprising: reproducing means for reading out and reproducing a model sound signal from a recording medium on which a model sound signal based on a song and accompaniment of a modeled person is recorded; Model sound signal removing means for inputting the reproduced model sound signal, and removing the model sound signal based on the song of the modeled person from the input model sound signal and extracting only the accompaniment sound signal; Model audio signal extracting means for extracting a model audio signal by subtracting an acoustic signal of only the accompaniment extracted by the model audio signal removing means from the reproduced model sound signal; First conversion means for wavelet transforming the extracted model voice signal; A singing voice converting means for inputting the singing voice of the scoring target and converting the singing voice into a scoring target speech signal; Second conversion means for wavelet transforming the converted target speech signal; And Scoring means for obtaining a coincidence between the outputs of the first and second converting means in each of the same frequency bands, and obtaining a scoring value for the song of the grading target based on the obtained correspondences; Karaoke scoring apparatus characterized in that. In a karaoke scoring apparatus, a model sound signal and an accompaniment are recorded in each channel from a recording medium in which a model sound signal based on the singer and accompaniment of the modeled person is recorded in one channel, and an acoustic signal of the accompaniment is recorded in the other channel. Reproducing means for reading out and reproducing the only acoustic signal; First conversion means for wavelet transforming the reproduced model sound signal; A singing voice converting means for inputting the singing voice of the scoring target and converting the singing voice into a scoring target speech signal; Scoring target sound signal output means for outputting a scoring target sound signal by adding the input acoustic signal only to the accompaniment and the scoring target sound signal converted by the singing voice converting means; Second conversion means for wavelet transforming the scoring target sound signal; And Scoring means for obtaining a coincidence between the outputs of the first and second converting means in each of the same frequency bands, and obtaining a scoring value for the song of the grading target based on the obtained correspondences; Karaoke scoring apparatus characterized in that. In a karaoke scoring apparatus, a model sound signal and an accompaniment are recorded in each channel from a recording medium in which a model sound signal based on the singer and accompaniment of the modeled person is recorded in one channel, and an acoustic signal of the accompaniment is recorded in the other channel. Reproducing means for reading out and reproducing the only acoustic signal; Model sound signal extracting means for extracting a model sound signal by subtracting the reproduced accompaniment sound signal from the reproduced model sound signal; First conversion means for wavelet transforming the extracted model voice signal; A singing voice converting means for inputting the singing voice of the scoring target and converting the singing voice into a scoring target speech signal; Second conversion means for wavelet transforming the scoring target speech signal; And Scoring means for obtaining a coincidence between the outputs of the first and second converting means in each of the same frequency bands, and obtaining a scoring value for the song of the grading target based on the obtained correspondences; Karaoke scoring apparatus characterized in that. The karaoke scoring apparatus according to any one of claims 1 to 4, wherein the wavelet transform is an orthogonal wavelet transform. A karaoke scoring method comprising the steps of: reading and reproducing a model sound signal from a recording medium on which a model sound signal based on a song and accompaniment of a modeled person is recorded; Wavelet transforming the reproduced model sound signal; Removing the model sound signal based on the singer of the modeled person from the reproduced model sound signal and extracting an acoustic signal only for the accompaniment; Converting the voice of the scoring target into a scoring target audio signal; Mixing the extracted accompaniment sound signal with the converted scoring object sound signal to output a scoring object sound signal; Wavelet transforming the scoring target sound signal; And A correspondence between the frequency components of the wavelet transformed model sound signal and the wavelet transformed scoring object sound signal is obtained for each same frequency band, and based on the obtained correspondences, Karaoke scoring method comprising the step of obtaining a scoring value. A karaoke scoring method comprising the steps of: reading and reproducing a model sound signal from a recording medium on which a model sound signal based on a song and accompaniment of a modeled person is recorded; Inputting the reproduced model sound signal, and removing the model sound signal based on the song of the modeled person from the input model sound signal and extracting an acoustic signal only for the accompaniment; Extracting a model audio signal by subtracting an acoustic signal of only the accompaniment extracted from the reproduced model sound signal; Wavelet transforming the extracted model voice signal; Converting the voice of the scoring target into a scoring target audio signal; Wavelet transforming the converted target speech signal; And The correspondence between the frequency components of the wavelet transformed model voice signal and the wavelet transformed scoring object voice signal is obtained for each same frequency band, and based on the obtained correspondences, Karaoke scoring method comprising the step of obtaining a scoring value. In the karaoke scoring method, a model sound signal and an accompaniment are recorded in each channel from a recording medium in which a model sound signal based on the singer and accompaniment of the modeled person is recorded in one channel, and an acoustic signal of the accompaniment is recorded in the other channel. Reproducing and reproducing only a sound signal; Wavelet transforming the reproduced model sound signal; Converting the voice of the scoring target into a scoring target audio signal; Outputting a scoring target sound signal by adding the input acoustic signal only and the converted scoring target sound signal; Wavelet transforming the scoring target sound signal; And The correspondence between the frequency components of the wavelet transformed model sound signal and the wavelet transformed scoring object sound signal is obtained for each same frequency band, and based on the obtained correspondences, Karaoke scoring method comprising the step of obtaining a scoring value. In the karaoke scoring method, a model sound signal and an accompaniment are recorded in each channel from a recording medium in which a model sound signal based on the singer and accompaniment of the modeled person is recorded in one channel, and an acoustic signal of the accompaniment is recorded in the other channel. Reproducing and reproducing only a sound signal; Extracting a model audio signal by subtracting the reproduced accompaniment sound signal from the reproduced model sound signal; Wavelet transforming the extracted model voice signal; Converting the voice of the scoring target into a scoring target audio signal; Wavelet transforming the scored speech signal; And A correspondence between the frequency components of the wavelet transformed model voice signal and the wavelet transformed scoring object voice signal is obtained for each same frequency band, and based on the obtained correspondences, Karaoke scoring method comprising the step of obtaining a scoring value. The karaoke scoring method according to any one of claims 6 to 9, wherein the wavelet transform is an orthogonal wavelet transform. A storage medium incorporating a program executable by a computer, comprising: a module for reading out and reproducing a model sound signal from a recording medium on which a model sound signal based on a singer and accompaniment of a modeled person is recorded; A module for wavelet transforming the reproduced model sound signal; A module for removing a model sound signal based on the singer of the modeled person from the reproduced model sound signal and extracting an accompaniment only sound signal; A module for inputting a singing voice of a scoring target and converting it into a scoring target speech signal; A module for mixing the extracted accompaniment sound signal and the converted scoring object sound signal to output a scoring object sound signal; A module for converting the scoring target sound signal into a wavelet transform; And A module for obtaining a coincidence between the wavelet transformed model sound signal and each frequency component of a scored sound signal for each same frequency band, and obtaining a score value for the song of the scored person based on the obtained correspondences; A storage medium, comprising a program containing an embedded. A storage medium incorporating a program executable by a computer, comprising: a module for reading out and reproducing a model sound signal from a recording medium on which a model sound signal based on a singer and accompaniment of a modeled person is recorded; A module for inputting the reproduced model sound signal and removing the model sound signal based on the singer of the modeled person from the input model sound signal to extract an accompaniment sound signal only; A module for extracting a model audio signal by subtracting an acoustic signal of only the accompaniment extracted from the reproduced model sound signal; A module for wavelet transforming the extracted model voice signal; A module for inputting a singing voice of a scoring target and converting it into a scoring target speech signal; A module for wavelet transforming the converted target speech signal; And A module for obtaining a coincidence between the wavelet transformed model speech signal and each frequency component of the scored speech signal for each same frequency band, and obtaining a score value for the song of the scored subject based on the obtained correspondences; A storage medium, comprising a program containing an embedded. In a storage medium having a program executable by a computer, a model sound signal based on the singer and accompaniment of the modeled person is recorded in one channel, and the acoustic signal of the accompaniment is recorded in the other channel. A module for reading out and reproducing the model sound signal and the accompaniment sound signal in each channel; A module for wavelet transforming the model sound signal reproduced in the one channel; A module for inputting a singing voice of a scoring target and converting it into a scoring target speech signal; A module for adding a sound signal of the accompaniment only and the converted scoring object sound signal to output a scoring sound signal; A module for converting the scoring target sound signal into a wavelet transform; And A module for obtaining a coincidence between the wavelet transformed model sound signal and each frequency component of a scored sound signal for each same frequency band, and obtaining a score value for the song of the scored person based on the obtained correspondences; A storage medium, comprising a program containing an embedded. In a storage medium having a program executable by a computer, a model sound signal based on the singer and accompaniment of the modeled person is recorded in one channel, and the acoustic signal of the accompaniment is recorded in the other channel. A module for reading out and reproducing the model sound signal and the accompaniment sound signal in each channel; A module for extracting a model audio signal by subtracting the reproduced accompaniment sound signal from the reproduced model sound signal; A module for wavelet transforming the extracted model voice signal; A module for inputting a singing voice of a scoring target and converting it into a scoring target speech signal; A module for converting the scoring target speech signal into a wavelet transform; And A module for obtaining a coincidence of the frequency components of the wavelet transformed model speech signal and the scored speech signal for each same frequency band, and obtaining a score value for the song of the scored subject based on the obtained correspondences. A storage medium, comprising a program containing an embedded. 15. The storage medium of claim 11, wherein the wavelet transform is an orthogonal wavelet transform.

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