JP2000330578A - Signal processing device - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To provide an optimum effect to a singing audio signal according to a karaoke music genre. SOLUTION: Reproduction circuits 11 to 14 for reproducing an audio signal and data from a karaoke disk 1 and a circuit 4 for changing the characteristics of a singing voice from a microphone 41 to the audio signal in accordance with the reproduced data.
4 and 45 are provided. A mixer circuit 46 is provided for mixing and outputting the audio signal of the singing voice changed by the circuits 44 and 45 and the audio signal of the reproduced music.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a signal processing device suitable as a karaoke device.

[0002]

2. Description of the Related Art In a karaoke apparatus, echo processing (addition processing of reverberation), correction of frequency characteristics, and the like are performed on a singer's singing voice, that is, a vocal audio signal, in order to improve the acoustic effect of the singer's singing. Is being done. In this case, the delay time,
There are a plurality of parameters such as reverberation amount and frequency band.
Also, the frequency characteristic is divided into a plurality of bands and the level is corrected, so that there are also a plurality of parameters.

However, if the user is allowed to change all of the above parameters, the operability deteriorates, and in some cases, the effect is adverse. Therefore, in an actual karaoke apparatus, the operability of the user is taken into consideration. , The user can change only a few of the above parameters. Further, the variable range is also limited.

[0004]

However, the ambience of the music itself varies depending on the genre of music, such as enka and pop, so if the type and range of parameters that can be changed by the user are limited, correction may be made depending on the genre of music. Excessive or inadequate sound effects cannot be obtained.

[0005] Even if an appropriate correction can be made, it is necessary to change the correction every time the music genre changes.

[0006] The present invention is to solve such a problem.

[0007]

Considering now a video CD which is a kind of CD-ROM, this video CD has a format called a karaoke format. According to the karaoke format, data compressed video data is used. A signal, a data-compressed audio signal, and auxiliary data are recorded.

The present invention has been made to solve the above-mentioned problems by focusing on such points. That is, according to the present invention, an A / D converter circuit for converting a singing voice audio signal into a digital audio signal, and the digital audio signal output from the A / D converter circuit based on a genre code of a karaoke song. A signal processing circuit for changing a frequency characteristic and a reverberation characteristic; a mixer circuit for mixing and outputting a digital audio signal output from the signal processing circuit and the digital audio signal output from the A / D converter circuit; And a signal processing device having the same. Therefore, depending on the genre code of the karaoke song,
The characteristic of the singing voice with respect to the audio signal is automatically set to an optimal value for the music genre of the karaoke to be reproduced.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In FIG. 1, reference numeral 1 denotes a karaoke format video CD, and reference numeral 10 denotes a reproducing apparatus. Then, as shown in FIG. 2A, the video CD 1
Like a D-ROM, it has a lead-in track at the beginning,
The tracks TRK1 to TRKN of N (N ≦ 99) data
And a lead-out track. And truck
Of the TRK1 to TRKN, the first track TRK1 records various information and data relating to the content of the video CD, and the fact that the video CD is in the karaoke format is also described in the track TRK1. ing.

Further, as shown in FIG. 2B, a karaoke data table for (N-1) music pieces is prepared for the first track TRK1. This data table is called a “sequence item table” and is independently configured for each music piece. That is, (N-1) sequence item tables SIT1 to SIT (N-1) are provided corresponding to each karaoke song.

FIG. 3 shows the table SITi (i = 1 to (N-
It shows the structure of 1)) and has 64 item columns. The items include essential items and optional items, and the length of the content in each item column is variable.
For example, the item number 9 is an item column of a song title, and the content is text data indicating the song title. Alternatively, item number 18 is an item column for lyrics, and the lyrics are stored in the form of text data. Also, item numbers 22-31
Are open to the maker and can be freely defined and used by the maker.

Therefore, in this example, table SITi
Out of the item numbers 22 to 31, are items indicating the music genre of the i-th song corresponding to the table SITi, and the contents are determined, for example, as shown in FIG.

That is, assuming that the music genre of the i-th song corresponding to the table SITi is, for example, “Enka”, the content of the item number 22 of the table SITi is set to 20H (“H” is 16). (The same applies to the following.) If it is pops, it is 21H. In this manner, data indicating the music genre of the i-th song corresponding to the table SITi is prepared in ASCII code in the table SITi.

Further, the first track TRK2 includes the first track TRK2.
The video signal data and the audio signal data of the karaoke of the music piece are recorded in a data compressed state, respectively. In this case, the video signal data is recorded, for example, by compressing a luminance signal and two color difference signals by the MPEG method. In the audio signal data, the left and right channel signals are formed into one block for each predetermined number of samples, and data is compressed and recorded for each block.

Although the video signal and the audio signal are recorded in sector units, the order and the number (ratio) of the video signal sector and the audio signal sector are undefined. Therefore, for each sector, data indicating whether the signal recorded in the sector is a video signal or an audio signal is recorded at the head of each sector together with other information.

In the same manner, the karaoke video signal and audio signal of the second to (N-1) th tracks are compressed on the third to Nth tracks TRK3 to TRKN, respectively. It is recorded in.

In the reproducing apparatus 10, a signal recorded on the video CD 1 is reproduced by the optical pickup 11, and the reproduced signal is reproduced by the reproducing amplifier 12.
, And is subjected to processing such as EFM demodulation and error correction. A signal subjected to this processing is supplied to a CD-ROM decoder circuit 14 where decoding processing is performed on a sector basis. A signal is output.

The data of the first track TRK1 among the output signals of the decoder circuit 14 is taken into the microcomputer 56 and used for the subsequent reproduction control.

The video signal data of the output signal of the decoder circuit 14 is taken into the MPEG decoder circuit 21 to decode the original video signal, for example, a luminance signal and two color difference signals. And
The decoded video signal is D / A-converted into an analog signal in a D / A converter circuit 22.
The / A-converted video signal is supplied to an NTSC encoder circuit 23 and encoded into an NTSC color composite video signal.
Is output to

The audio signal data of the output signal of the decoder circuit 14 is
1, the original audio signal, that is, the audio signals of the left and right channels of karaoke (playing) are decoded, and the decoded audio signals are supplied to the pitch conversion circuit 32.

The pitch conversion circuit 32 adjusts the pitch of the audio signal supplied thereto to a range where the singer can utter, thereby facilitating singing. For this reason, a pitch operation section 51 is provided. When data specifying a pitch is input from the operation section 51, the data is supplied to the pitch conversion circuit 32 through the microcomputer 56, and the pitch of the audio signal supplied thereto is provided. Is converted to the pitch specified by the operation unit 51.

Further, in this example, an operation section 52 for adjusting the speed of the music is provided, and the output of the operation section 52 is supplied to a microcomputer 56, which controls the rotation speed of the CD 1 and the decoder circuit 21. , 31 are controlled to change the reproduction speed of the video signal and the audio signal in accordance with the output of the operation unit 52, and the change in the signal caused by the change in the speed is corrected.

The audio signal from the pitch conversion circuit 32 is supplied to the mixer circuit 46 through the equalizer circuit 33.
Supplied to In this case, for example, the equalizer circuit 33 divides the karaoke audio signal into a plurality of bands and corrects the level for each band.

An audio signal of the singer's vocal is transmitted from the microphone 41 to the A / D
The signal is supplied to a converter circuit 43 and converted into a digital audio signal. The signal is supplied to a mixer circuit 46 through an equalizer circuit 44 and an echo processing circuit 45. In this case, the equalizer circuit 44 divides the vocal audio signal into a plurality of bands and corrects the level for each band. The echo processing circuit 45
Is for adding reverberation to the vocal audio signal supplied thereto, and its echo characteristics, that is, parameters such as reverberation time, reverberation amount, and frequency characteristics can be set.

In this way, in the mixer circuit 46, the karaoke audio signal and the vocal audio signal are mixed, that is, the vocal is added to the karaoke audio signal, and this audio signal is D / A
The signal is supplied to the converter circuit 47 and subjected to D / A conversion.

Further, in this case, data indicating the music genre described in the item number 22 is extracted from the data of the table SITi among the data of the first track TRK1 taken into the microcomputer 56,
Data indicating the music genre is supplied to the microcomputer 57. And the microcomputer 57
Accordingly, the parameters of the equalizer circuits 33 and 44 and the echo processing circuit 45 are set according to the data indicating the music genre supplied to the microcomputer 57.

That is, as an example, when the data indicating the music genre indicates “enka”, the low and middle regions of the vocal audio signal are boosted, and the reverberation time and reverberation amount are set to be relatively large. Is done. Further, the frequency band of the reverberation component is set narrow. On the other hand, if the data indicating the music genre indicates “pops”, the low and middle boost amounts of the vocal audio signal are made smaller than in the case of enka, and the reverberation time and reverberation The amount is also set small. Further, the frequency band of the reverberation component is set wider than in the case of enka. These setting values are prepared in the microcomputer 57 in advance.

Further, in this example, the singer can change the parameters of the echo processing circuit 45. That is, an operation unit 53 is provided, the operation output of the operation knob is supplied to the microcomputer 57, and the parameters of the echo processing circuit 45 are stored in the table SI.
The value is changed within a predetermined range around a value set by the data indicating the music genre of Ti. The operation unit 53
Is operated, the singer can arbitrarily switch the data indicating the music genre regardless of the data indicating the music genre in the table SITi. Alternatively, each parameter is directly changed to an arbitrary value by the user.

Thus, according to the video CD 1 and the reproducing apparatus 10 of FIG. 1, karaoke can be enjoyed.
In this case, in particular, the video CD 1 and the playback device 10 described above are used.
According to this, the equalizer characteristics and the echo processing characteristics for the vocals are automatically set to optimal values according to the music genre of karaoke.

Therefore, acoustically or musically,
It is possible to sing with an optimal production that matches the mood of the music itself that karaoke has, without excessive or shortage of productions. Moreover, for that purpose, the singer does not need to perform any special operation, but only has to select a song to sing.

In the above description, the present invention is applied to a video CD in a karaoke format and a reproducing apparatus therefor. The present invention is applied to a medium having audio signals of karaoke performance and data indicating a genre of the karaoke music. If there is, for example, CD-DA, laser disk (registered trademark), or even a wired system,
The present invention can be applied.

[List of abbreviations used in this specification] A / D: Analog to Digital CD: Compact Disc CD-ROM: Compact Disc-ROM EFM: Eight to Fourteen Modulation MPEG: Motion Picture Image Coding Experts
Group NTSC: National Television System Committe
e; US Television System Committee ROM: Read Only Memory

[0033]

According to the present invention, the equalizer characteristics and the echo processing characteristics for vocals are automatically set to optimal values in accordance with the karaoke music genre. Therefore, it is possible to sing with an optimal effect suited to the atmosphere of the music itself of the karaoke, without excessive or shortage of the effect acoustically or musically. Moreover, for that purpose, the singer does not need to perform any special operation, but only has to select a song to sing.

[Brief description of the drawings]

FIG. 1 is a system diagram showing an example of the present invention.

FIG. 2 is a diagram showing a track format.

FIG. 3 is a diagram illustrating an example of a data table.

FIG. 4 is a diagram showing an example of data contents.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Video CD, 10 ... Reproducing device, 11 ... Optical pickup, 13 ... Reproduction decoder circuit, 14 ... CD-ROM decoder circuit, 21 ... Video signal MPEG decoder circuit,
22 ... D / A converter circuit, 23 ... NTSC encoder circuit, 31 ... MPEG decoder circuit for audio signal, 32 ... Pitch conversion circuit, 33 ... Equalizer circuit, 41
... microphone, 43 ... A / D converter circuit, 44
... Equalizer circuit, 45 ... Echo processing circuit, 46 ... Mixer circuit, 47 ... D / A converter circuit, 51-53 ... Operation unit, 56 and 57 ... Microcomputer, SIT1 ~
SIT (N-1)… Sequence item table

Claims (3)

[Claims] An A / D converter circuit for converting a singing voice audio signal into a digital audio signal, and a frequency characteristic based on a genre code of a karaoke tune for the digital audio signal output from the A / D converter circuit. And a signal processing circuit for changing reverberation characteristics, and a mixer circuit for mixing and outputting the digital audio signal output from the signal processing circuit and the digital audio signal output from the A / D converter circuit. Signal processing device. 2. The signal processing device according to claim 1, wherein the genre code of the karaoke tune is supplied from a recording medium. 3. The signal processing apparatus according to claim 1, wherein the genre code of the karaoke tune is supplied from a wired system.