JP2008203389A - Music playback device and recording medium - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem that large capacity of a recording medium is consumed, as voice and a music piece must be stored with the same bit rate in the same recording medium, in a structure of a conventional music player. <P>SOLUTION: A music data 20 including voice and accompaniment music, and a voice data 21 of only voice with a lower bit rate than this, are stored in the same recording medium 2. The music data is reproduced by a reproduction means 10, and at the same time, the voice is reproduced by expanding the bit rate of the voice data 21 by a sampling frequency (FS) conversion means 11. By subtracting the reproduced voice from the reproduced music by a subtraction means 15, a music data for karaoke is reproduced. As a frequency band of voice is narrower than that of a usual music data or the music data for karaoke, the same level of sound quality is maintained even if the bit rate is reduced, and the capacity of the recording medium for recording the data for karaoke is suppressed. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a music playback device and a music recording medium, and more particularly to an improvement of a music playback device and a recording medium used for karaoke applications that play only the music (accompaniment) without sound.

  A conventional music playback apparatus used for karaoke uses a left channel (hereinafter referred to as “speech”) to cancel voice data (hereinafter referred to as “speech”) included in music data from music data accompanied by accompaniment. Hereinafter, the in-phase signal of the right channel (hereinafter referred to as Rch) data is detected and the audio is canceled by subtracting the in-phase signal from the Lch / Rch data. For example, see Patent Document 1).

  However, this in-phase signal may include not only audio data but also music data (hereinafter referred to as music) that is music (accompaniment) data other than audio, and when there are multiple vocals, etc. In some cases, the sound is present other than the in-phase signal.

  For this reason, the above-described conventional music reproducing apparatus has a problem that the sound cannot be canceled sufficiently or the music may be canceled.

  Therefore, conventionally, not only data of normal music (music and voice) but also data of only music of the same music is stored on the same recording medium (for example, CD) together with normal music data, and karaoke is performed. In the case of using for music, a method of reproducing only music data has been taken.

An example of such a conventional music reproducing apparatus is shown in FIG.
The conventional music reproducing apparatus is configured to record either music data 20 or music data 25 from the recording medium 2 in which music data 20 including sound and music and music data 25 without sound are recorded for each music. Selection means 31 for selectively outputting, reproduction means 10 for reproducing data selected by the selection means 31, a microphone (speech input means) 3 for inputting a user's voice, and the voice input means Switch means 32 for switching whether or not the sound input from 3 is output to the adding means 16, and the music output from the reproducing means 10 and the sound input by the sound input means 3 via the switch means 32 are added. Adding means 16 and music output means 4 for outputting the music to which the user's voice is added by the adding means 16 as sound.

Next, the operation will be described.
The recording medium 2 records music data 20 and music data 25 that includes only the accompaniment portion (music) of this music.

  Either the music data 20 or the music data 25 stored in the recording medium 2 is selected by the selection unit 31, and the selected data is reproduced by the reproduction unit 10.

  When the selection means 31 selects the music data 20, the switch means 32 is turned off, and the signal output from the reproduction means 10 is output to the music output means 4 without being added by the adding means 16.

  When the selection means 31 selects the music data 25, the switch means 32 is turned on, the signal output from the reproduction means 10 and the signal input from the audio input means 3 are added by the addition means 16, and the music is The added signal is output to the output means 4.

  Therefore, in this conventional system, when listening to only music, normal music can be heard from the music output means 4 by selecting the music data 20 and inputting it to the music playback device 1.

Further, when performing karaoke, the music data 25 is selected and the voice is input from the voice input means 3 so that the music output means 4 can listen to the music in which the user's voice and the music are mixed. I can do it.
Japanese Patent Laid-Open No. 7-92985 (FIG. 4)

  The conventional music reproducing apparatus is configured as described above, and requires the same frequency band (up to 20 kHz) for music data and music data. For this reason, it is necessary to prepare data having the same bit rate as the music data even though the audio data is not included in the music data. Accordingly, the capacity for recording the music data is required as much as the music data, and a large number of music cannot be stored on the recording medium.

  The present invention has been made to solve the above-described problems of the prior art, and when reproducing a recording medium in which the karaoke data is recorded on the same medium together with the music data, the recording of the recording medium is performed. An object of the present invention is to provide a music reproducing apparatus and a recording medium capable of reproducing a recording medium capable of reducing the capacity and recording a larger number of songs than in the case of recording media having the same capacity.

  According to a first aspect of the present invention, there is provided a music playback apparatus for playing back music data that is recorded on a recording medium and that is music data including voice and music, the recording medium further including the music Audio data that has been recorded at a lower bit rate than the data, and that is audio data that is audio data that has been decompressed and reproduced, and audio data that has been decompressed and reproduced by the decompression and reproduction means from music data that has been reproduced by the reproducing means Subtracting means for subtracting and outputting music data that is data of only the music.

  As a result, it is possible to reproduce music-only data by decompressing and subtracting from the music data the audio data having a lower bit rate simultaneously with the reproduction of the music data.

  The music playback device according to claim 2 of the present invention plays back music data that is recorded on a recording medium and is music data including voices and music of N people (N is an integer of 2 or more). Playback means, N number of extension playback means for expanding and reproducing the audio data of the N persons recorded on the recording medium at a lower bit rate than the music data, and playback by the playback means Subtracting means for subtracting N person's audio data expanded and reproduced by the N number of reproducing and reproducing means from the music data, and outputting music data which is only music data.

  As a result, music data can be played back at the same time as multiple audio data with low bit rates are decompressed and subtracted from the music data. I can do it.

  The music playback device according to claim 3 of the present invention is the music playback device according to claim 1 or 2, wherein the audio data is recorded at a frequency lower than a sampling frequency of the music data. It is recorded on a medium, and the decompression reproduction means decompresses and reproduces the audio data by converting the sampling frequency of the audio data into the sampling frequency of the music data.

  Thus, it is possible to obtain audio data necessary for generating music data in the audio reproducing apparatus according to claim 1 or 2.

  The music playback device according to claim 4 of the present invention is the music playback device according to claim 1 or 2, wherein the audio data is compressed by converting time-domain audio data into a frequency band and compressing the audio data. It is recorded on a recording medium, and the decompression reproduction means decompresses and reproduces the audio data by converting the compressed audio data into audio data in a time axis region.

  Thus, it is possible to obtain audio data necessary for generating music data in the audio reproducing apparatus according to claim 1 or 2.

  Furthermore, the recording medium according to claim 5 of the present invention records music data, which is music data including voice and music, at a predetermined bit rate, and further stores the voice data, which is the voice data. , And recorded at a lower bit rate than the music data.

  As a result, the capacity of karaoke data can be reduced and a large number of songs can be recorded.

  In the prior art, music data that had to be stored at the same bit rate as the music data is stored in the recording medium, whereas in the present invention, the music is played back using audio data that can be stored at a lower bit rate. Can be stored on the same recording medium.

  The present invention makes it possible to reduce the recording capacity of a recording medium on which music data and karaoke data are recorded according to the following principle.

  That is, the frequency band of audio data is about 0 to 4 kHz. For this reason, in the case of audio data only, the frequency part (mainly the high frequency range) that cannot be heard by humans as sound after the sampling frequency is lowered or the audio data is converted to a signal in the frequency axis domain while maintaining the sound quality. By performing processing such as thinning out data, the bit rate can be lowered.

  Therefore, the recording capacity of the recording medium can be reduced by recording audio data with a reduced bit rate as karaoke data instead of the conventional music data, and from the reproduced music data on the music reproducing apparatus side. By subtracting the reproduced audio data, music data can be generated and karaoke can be enjoyed.

  Embodiments of a music playback apparatus according to the present invention will be described below in detail with reference to the drawings.

(Embodiment 1)
FIG. 1 is a block diagram showing a configuration of a music playback device according to Embodiment 1 of the present invention.
In FIG. 1, the music playback apparatus according to the first embodiment of the present invention includes music data 20 including voice and music, and a voice portion of the music data, and has a lower FS (sampling frequency) than the music data. Selection means 31a, 31b for selecting whether to extract only the music data 20 or both the music data 20 and the sound data 21 from the recording medium 2 on which the sampled sound data 21 is recorded, and the selection means The reproduction means 10 for reproducing the music data 20 selected by 31a, and the FS conversion means 11 for reproducing the audio data 21 selected by the selection means 31b by converting the audio data 21 to have the same FS as the music data. Decompression reproduction means), subtraction means 15 for subtracting the output of the FS conversion means 11 from the output of the reproduction means 10, and the user's voice A microphone (speech input means) 3, a switch means 32 for switching whether or not the sound input from the sound input means 3 is output to the adding means 16, and a music and switch means output from the subtracting means 15 The adding means 16 adds the sound input by the sound input means 3 via 32, and the music output means 4 outputs the music added with the user's voice by the adding means 16 as sound.

Next, the operation will be described.
On the recording medium 2, music data 20 and audio data 21 sampled at a sampling frequency lower than that are recorded.

  This audio data 21 is generated as follows. That is, since the music data 20 is generated by mixing music and sound in the studio, when the sound for the music data 20 is acquired and the music data is generated, in parallel with this, sampling lower than the music data 20 is performed. Sound is acquired at a frequency and sound data 21 is generated.

  Only the music data 20 stored in the recording medium 2 or both the music data 20 and the audio data 21 is selected by the selection means 31a and 31b.

  When only the music data 20 is selected, normal music (voice + music) is played back, and the selected music data 20 is played back by the playback means 10. At this time, since there is no output of the FS conversion means 11, no subtraction by the subtraction means 15 is performed. Since the switch means 32 is also turned off, the sound that has passed through the subtracting means 15 is output to the music output means 4 without adding the output signal of the sound input means 3. Accordingly, the audio output means 4 generates a reproduction sound of music data.

  On the other hand, when both the music data 20 and the voice data 21 are selected, only the karaoke music is played back. The music data 20 is played back and the voice data 21 is converted into the music data 20 by the FS conversion means 11. The audio data 21 is expanded by being converted to the same sampling frequency.

  The reproduction signal of the music data output from the reproduction means 10 is subtracted from the reproduction signal of the audio data output from the FS conversion means 11 by the subtraction means 15 to become a reproduction signal of only the music data.

  At this time, since the switch means 32 is turned on, the reproduction signal output from the subtracting means 15 is added to the user's voice signal inputted from the voice input means 3 by the adding means 16 to output the music. Output to means 4.

  With this configuration, the audio data input from the audio input unit 3 can be added to the music data obtained by removing the audio data from the music data, and the music output unit 4 can output the music data. Therefore, the music output means 4 can generate the reproduction sound of the music added with the user's voice (song) and enjoy karaoke.

  FIG. 2 is a more detailed diagram of the music reproducing apparatus according to the first embodiment, which can reduce the recording capacity of a recording medium in which music data and karaoke data are recorded on the same medium based on the principle described above. The configuration is shown.

  In the figure, 200 is a CD (compact disc) which is a recording medium on which music data 200a and audio data 200b are recorded, 201 is a pickup for reproducing information recorded on the CD 200, 202 is an analog reproduced by the pickup 201. FE (front end) processing unit for processing high-frequency signals; 203, a memory IF (interface) that is an interface to the DRAM 204; 204a, a music data recording area that stores music data in the DRAM 204; and 204b, audio in the DRAM 204 A voice data recording area for storing data; 205, a microphone for inputting a user's voice; 206, an A / D conversion means for converting an analog voice signal from the microphone 205 into voice data; 207, a memory IF 203; DRAM 204 via The signal processing unit (reproducing unit, decompressing / reproducing unit, subtracting unit, adding unit) 208 for processing the music data, audio data and the audio data output by the A / D conversion unit 206, 208 is the signal processing unit 207. A D / A conversion unit 209 converts data to be output into an analog audio signal, and a speaker 209 emits the analog audio signal output from the D / A conversion unit as sound.

Next, the operation will be described.
The music data 200a and audio data 200b recorded on the CD 200 are read by the pickup 201. These data are analog high-frequency signals because the CD 200 rotates at high speed, and preprocessing for conversion into digital signals is performed by the FE processing unit 202. This digital signal is temporarily stored in the music data storage area 204a and the sound data storage area 204b of the DRAM 204 via the memory IF 203, respectively.

  Next, the music data and audio data read out via the memory IF 203 are processed by the signal processing unit 207 corresponding to the reproducing means 10, the FS converting means 11, the subtracting means 15, and the adding means 16 in FIG. .

  That is, the reproduction of the music data read from the music data storage area 204a, the sampling frequency conversion of the audio data read from the audio data storage area 204b, and the audio data of which the sampling frequency is converted from the reproduced music data. The signal processing unit 207 performs subtraction and addition of the music data generated by the subtraction and the microphone 205 sound converted into a digital signal by the A / D conversion unit 206. Data obtained by adding the music data and microphone sound data output from the signal processing unit 207 is converted into an analog signal by the D / A conversion means 208, and karaoke sound accompanied by accompaniment is output as sound by the speaker 209. The

  In order to enable such processing, data is read from the CD 200 at a double speed and stored in the DRAM 204. The signal processing unit 207 may be realized by hardware, or the signal processing unit 207 may be configured by a DSP, and the above-described functions may be realized by software. If not used as karaoke, only music data may be played. At this time, the CD does not have to be played at double speed.

FIG. 3 shows the overall configuration of a CD player as an example of the audio reproducing apparatus according to the first embodiment.
In the figure, reference numeral 301 denotes a CD (recording medium) having a music track on which music data recorded at a standard sampling frequency is recorded and an audio track on which audio data recorded at a lower sampling frequency is recorded. Is a spindle motor that rotates the CD 301, 303 is an optical pickup that reads information on music tracks and audio tracks recorded on the CD 301, and 304 amplifies a radio frequency (RF) signal obtained by the optical pickup 303 and converts it into a digital signal. RF amplifier 305, traverse motor that moves optical pickup 303 in the radial direction of CD 301, servo circuit 308 that performs tracking control of optical pickup 303 and traverse control of traverse motor 305, and 309 that drives spindle motor 302 The motor driver 310 is a DRAM that temporarily stores the recording information of the CD 301 output from the RF amplifier 304, and 311 is a memory controller that controls writing and reading of the digital signal output from the RF amplifier 304 to the DRAM 310. The read control circuit 310a reads information from the DRAM 310, a write control circuit 310b that writes information to the DRAM 310, and a control circuit 311c that controls the read control circuit 310a and the write control circuit 310b. 314 is an operation panel for operating the CD player, 315 is a system controller that controls the entire CD player according to the operation of the operation panel 314, and 316 is a digital signal that performs digital signal processing on the data read from the memory controller 311 Processing circuits (reproducing means, decompression reproducing means, subtracting means, adding means) 317 is a CLV circuit that controls the motor driver 309 so that the CD 301 rotates at CLV (constant linear velocity), and 318 inputs the user's voice. A microphone 319 converts an audio signal from the microphone 318 into a digital signal and outputs the digital signal to the digital signal processing circuit 316, 323 converts the data read from the DRAM 310 by the memory controller 311 into an analog signal, D / A converter that outputs to a speaker (not shown) It is.

Next, the operation will be described.
First, when the user operates the power button of the operation panel 314, music tracks and audio tracks (lists) recorded on the CD 301 are displayed on the display surface of the operation panel.

  At this time, an audio track containing only audio may be displayed as “audio only” as it is, but since this audio track is for karaoke, for example, as shown in FIG. , 3. , 5. ,... Are music A, B, and C (where A, B, and C are music titles). , 4. , 6. ,... May be displayed as A karaoke, B karaoke, C karaoke,.

  Next, for example, the track 2. Assuming that A's karaoke is selected and the play button is pressed, this means that the CD player is instructed to play tracks 1 and 2 at the same time. When this reproduction is instructed, the servo circuit 308 is controlled by the system controller 315, and various servo operations are performed. That is, the traverse motor 305 and the optical pickup 303 are controlled by the servo circuit 308 so that the optical pickup 303 alternately jumps to the target tracks 1 and 2. At the same time, the CD 301 is rotated by the spindle motor 302 at a double speed, for example, twice as high as the standard reproduction state.

  At this time, the optical pickup 303 and the RF amplifier 304 are also operated at a speed twice as high as that in the standard state. For example, as shown in FIG. ) Is read and the reproduced data is written into the DRAM 310. Thereafter, the track 2 data (for example, one frame) is read at twice the speed of the standard state, the reproduced data is written into the DRAM 310, and the tracks 1 and 2 data are aligned in the DRAM 310. Thereafter, the music data of track 1 and the audio data of track 2 are read from the DRAM 310, and the reproduction processing of the music data of track 1 and the expansion processing of the audio data of track 2 are performed by the digital signal processing circuit 316. Further, the audio data subjected to the signal processing is subtracted from the music data subjected to the signal processing to generate music data (for example, one frame), and further, the microphone 318 obtained by the A / D converter 319 is generated. The process of adding the audio data is also executed by the digital signal processing circuit 316. The music data output from the digital signal processing circuit 316 and superimposed with the microphone sound is converted into an analog signal by the D / A converter 323. By repeating these series of processes for each frame, a user's song accompanied by accompaniment is emitted as a sound from a speaker (not shown).

  Further, as shown on the left side of FIG. 6, since it is only necessary to record compressed audio data as data for karaoke on the CD, audio and music are recorded as on the conventional CD shown on the right side of FIG. The amount of music per song is less than that of music data recorded at the same bit rate as the music data, and more songs can be recorded if the CD has the same capacity.

  As described above, according to the first embodiment, the music data of track 1 and the audio data of track 2 recorded at a sampling frequency lower than this music data are read out at a high speed and subjected to high-speed signal processing and reproduced. The process of subtracting the reproduced audio data from the music data to obtain music data and adding the audio data from the microphone to this is the same as the normal audio track audio data reading and signal processing By executing so as to end within the time, in the prior art, it was necessary to store the music data on the recording medium at the same bit rate as the music data, whereas for the audio data 21 that is karaoke data, Able to record with a smaller capacity than the music data 20 and to play a karaoke by playing a recording medium with a reduced recording capacity in this way. It can be.

  Also, since low bit rate audio data may be recorded as karaoke data, more songs can be recorded and stored on recording media of the same capacity.

  The recording medium 2 can be composed of an optical disk such as a CD or DVD, a magnetic disk such as an HDD, or a semiconductor memory such as an SD memory or a USB memory. However, the recording medium 2 can be realized in a similar manner. I can do it.

(Embodiment 2)
FIG. 7 is a block diagram showing a configuration of the music playback device according to the second exemplary embodiment of the present invention.
In FIG. 7, the music playback apparatus according to the second embodiment of the present invention converts the music data 20 including voice and music and the voice of the music into the frequency axis region and compresses them by removing unnecessary frequency components. Selection means 31a, 31b for selecting whether to extract only the music data 20 or both the music data 20 and the voice data 22 from the recording medium 2 on which the audio data 22 is recorded, and the selection means 31a. Reproduction means 10 for reproducing the music data 20; frequency time axis conversion means (extension reproduction means) 12 for performing reproduction by converting the audio data 22 selected by the selection means 31b into data in the time axis region; Subtracting means 15 for subtracting the output of the frequency time axis converting means 12 from the output of the reproducing means 10, and voice inputting means 3 for inputting the user's voice The voice input means 3 inputs the voice input from the voice input means 3 via the switch means 32 for switching whether or not to output the voice to the addition means 16, the music output from the subtraction means 15 and the switch means 32. The adding means 16 for adding the sound and the music output means 4 for outputting the music to which the user's voice is added by the adding means 16 as sound.

  That is, in the first embodiment, the audio data 21 recorded at a low sampling frequency as karaoke data is recorded on the recording medium 2, but in this second embodiment, the audio signal is converted into the frequency axis region, The audio data (for example, mp3 or the like) in which information is compressed by cutting this portion is used for the portion in which no exists. Correspondingly, the only difference is that the frequency time axis conversion means is used instead of the FS conversion means of the first embodiment.

Next, the operation will be described.
Only the music data 20 stored in the recording medium 2 or both the music data 20 and the audio data 22 is selected by the selection means 31a and 31b.

  When only the music data 20 is selected, normal music (voice + music) is played back, and the selected music data 20 is played back by the playback means 10. In this case, since there is no output of the frequency time axis conversion means 12, no subtraction by the subtraction means 15 is performed. Since the switch means 32 is also turned off, the sound that has passed through the subtracting means 15 is output to the music output means 4 without adding the output signal of the sound input means 3.

  On the other hand, when both the music data 20 and the audio data 22 are selected, it is a case where only the music is reproduced. The music data 20 is reproduced and the audio data 22 is converted into the music data 20 by the frequency time axis conversion means 12. The audio data 22 is reproduced by being converted into data in the same time axis region as in FIG.

  The reproduction signal of the music data output from the reproduction means 10 is subtracted from the reproduction signal of the audio data output from the frequency time axis conversion means 12 by the subtraction means 15 to become a reproduction signal of only the music data.

  The reproduction signal of only the music output from the subtracting means 15 is added to the user's voice signal input from the voice input means 3 by the adding means 16 because the switch means 32 is turned on. Is output.

  With this configuration, the audio data input from the audio input unit 3 can be added to the music data obtained by removing the audio data from the music data, and the music output unit 4 can output the music data.

  Note that the second embodiment differs from the first embodiment only in that frequency-time axis conversion is performed instead of FS conversion, so a more detailed configuration and the overall configuration of the CD player will be described. Is omitted.

  As described above, according to the second embodiment, music data and audio data that has been converted into the frequency axis region and compressed by removing frequency components that cannot be heard by humans are read out at double speed and signal processing is performed at high speed. The process of subtracting the reproduced audio data from the reproduced music data to obtain music data, and adding the audio data from the microphone to this, reading the audio data of the normal audio track and its signal By executing the processing so as to end within the same time as the processing, in the conventional technique, it is necessary to store the music data on the recording medium at the same bit rate as the music data, whereas the voice data 22 which is data for karaoke is used. Can be recorded with a smaller capacity than the music data 20, and the recording medium with the reduced recording capacity can be played in this way to enjoy karaoke. That.

  Also, since low bit rate audio data may be recorded as karaoke data, more songs can be recorded and stored on recording media of the same capacity.

  The recording medium 2 can be composed of an optical disk such as a CD or a DVD, a magnetic disk such as an HDD, or a semiconductor memory such as an SD or USB memory. However, the recording medium 2 can be similarly realized with other storage media. I can do it.

(Embodiment 3)
FIG. 8 is a block diagram showing the configuration of the music playback device according to the third embodiment of the present invention.
8, the music playback device according to the third embodiment of the present invention includes music data 20 including voice and music, and voice data 23a, 23b,... Sampled at a lower FS (sampling frequency) than the music data. .. From the recording medium 2 on which are recorded, only the music data 20, or all of the music data 20 and the audio data 23a, 23b,..., Or the music data 20 and some of the audio data 23a, 23b,. Selection means 31a, 31b, 31c,... For selecting which one to extract, reproduction means 10 for reproducing the music data 20 selected by the selection means 31a, selection means 31b, 31c,. FS conversion that performs reproduction by converting the audio data 23a, 23b,... , Subtracting means 15 for subtracting the wired OR output of the FS converting means 13a, 13b,... From the output of the reproducing means 10, and voice input means for inputting the user's voice. 3, the switch means 32 for switching whether or not the sound input from the sound input means 3 is output to the adder means 16, the music output from the subtractor means 15, and the sound input means 3 via the switch means 32. It comprises an adding means 16 for adding the input voice and a music output means 4 for outputting the music to which the user's voice is added by the adding means 16 as a sound.

Next, the operation will be described.
On the recording medium 2, music data 20, first audio data 23a, second audio data 23b,... Are recorded.

  Only the music data 20 stored in the recording medium 2, all of the music data 20 and the audio data 23a, 23b,..., Or any of the music data 20 and some of the audio data 23a, 23b,. Are selected by the selection means 31a and 31b, 31c,.

  When only the music data 20 is selected, normal music (voice + music) is played back, and the selected music data 20 is played back by the playback means 10. In this case, since there is no output of the FS conversion means 13a, 13b,..., The subtraction by the subtraction means 15 is not performed. Since the switch means 32 is also turned off, the sound that has passed through the subtracting means 15 is output to the music output means 4 without adding the output signal of the sound input means 3.

  On the other hand, when all of the music data 20 and the audio data 23a, 23b,... Are selected, only the music is played, and the music data 20 is played and the FS conversion means 13a, 13b,. The voice data 23a, 23b,... Are converted into the same sampling frequency as that of the music data 20, so that all the voice data 23a, 23b,.

  Since the outputs of these FS conversion means 13a, 13b,... Are wired OR connected, the audio data of all the singers included in this music are subtracted from the music data reproduced by the subtraction means 15, and only the music is recorded. It becomes a playback signal.

  The reproduction signal of only the music output from the subtracting means 15 is added to the user's voice signal input from the voice input means 3 by the adding means 16 because the switch means 32 is turned on. Is output.

  By configuring in this way, the music obtained by removing all of the plurality of voice data from the music data of the music in which a plurality of singers (for example, singer X, singer Y, and singer Z) participate. In addition, the user's voice input from the voice input means 3 can be added and output from the music output means 4.

  In addition, when the user wants to sing back the music and the voice of a specific singer (for example, only the singer Y among the above three singers), the voice of the specific singer among the selection means 31b, 31c,. By turning off only the corresponding selection means and turning on all the selection means corresponding to the other voices, all singers other than a specific singer (singer X, X, The voice data of the two singer Z) is removed, and data in which only the voice data of the specific singer (singer Y) remains in the music data is generated. The sound input from the sound input means 3 can be added to this and output from the music output means 4. With this configuration, it is possible to leave only the voice of a specific person even in music recorded with the voice of a plurality of people, and enjoy karaoke while leaving only the voice of the person (singer Y) who wants to sing together from a chorus etc. Become.

  Since the third embodiment is different from the first embodiment only in that a plurality of FS conversions are simultaneously performed, a description of a more detailed configuration and the overall configuration of the CD player is omitted.

  As described above, according to the third embodiment, music data and a plurality of audio data recorded at a sampling frequency lower than that of the music data are read out at a double speed and subjected to signal processing at high speed, and the reproduced music data is used. The process of subtracting a plurality of reproduced audio data to obtain music data and adding the audio data from the microphone to this is performed within the same time period as the normal audio track audio data reading and signal processing. By executing so that the music data ends, the music data from which all the audio data is erased can be obtained even if the music data includes a plurality of audio data, and karaoke can be enjoyed.

  In the third embodiment, only a part of the sound of the music data in which a plurality of names of sounds are recorded can be erased. That is, when there are a plurality of singers, voices other than those of a specific singer can be removed, and karaoke can be performed against the back of the music and the voice of the desired singer.

  The recording medium 2 can be composed of an optical disk such as a CD or a DVD, a magnetic disk such as an HDD, or a semiconductor memory such as an SD or USB memory. However, the recording medium 2 can be similarly realized with other storage media. I can do it.

  In addition, the audio data 23a, 23b,... May have different bit rates as long as the audio data 23a, 23b,.

  Furthermore, instead of providing a plurality of FS conversion means, a plurality of frequency time axis conversion means may be provided as shown in FIG.

  As described above, the music playback device and the recording medium according to the present invention have many recording media when a karaoke function is added to the music playback device to realize a music playback device that plays back karaoke along with normal music playback. This is useful for recording and storing songs.

1 is a block diagram showing a configuration of a music playback device according to a first embodiment of the present invention. 1 is a block diagram showing a more specific configuration of a music playback device according to a first exemplary embodiment of the present invention. 1 is a block diagram showing an overall configuration of a CD player as an example of a music playback apparatus according to a first embodiment of the present invention. The figure which shows an example of the display of the operation part of CD player as an example of the music reproduction apparatus concerning Embodiment 1 of this invention. The figure which shows an example of the time passage of the process of CD player as an example of the music reproduction apparatus concerning Embodiment 1 of this invention. The figure which shows an example of the track capacity of the recording medium used in the music reproducing apparatus concerning Embodiment 1 of this invention in contrast with the track capacity of the recording medium used in the conventional music reproducing apparatus. FIG. 2 is a block diagram showing a configuration of a music playback device according to a second embodiment of the present invention. FIG. 3 is a block diagram showing a configuration of a music playback device according to a third embodiment of the present invention. FIG. 6 is a block diagram showing a configuration of a modification of the music playback device according to the third exemplary embodiment of the present invention. The block diagram which shows the structure of the music reproduction apparatus of a prior art example

Explanation of symbols

2 Recording medium 3 Audio input means 4 Music output means 10 Playback means 11, 13a, 13b FS conversion means 12, 14a, 14b Frequency time axis conversion means 15 Subtractor 16 Adder 20 Music data 21 Audio data with low sampling rate 22 Frequency Axis audio data 23a First low sampling rate audio data 23b Second low sampling rate audio data 24a First frequency axis audio data 24b Second frequency axis audio data 25 Music data 31a, 31b, 31c Selection means 32 Switch means 200, 301 CD
200a Music data 200b Audio data 201 Pickup 202 FE processing unit 203 Memory IF
204,310 DRAM
204a Music data storage area 204b Audio data storage area 205, 318 Microphone 206, 319 A / D conversion means 207 Signal processing section 208, 323 D / A conversion means 209 Speaker 302 Spindle motor 303 Optical pickup 304 RF amplifier 305 Traverse motor 308 Servo Circuit 309 Motor driver 311 Memory controller 311a Read control circuit 311b Write control circuit 311c Control circuit 314 Operation panel 315 System controller 316 Digital signal processing circuit 317 CLV circuit

Claims (5)

Reproduction means for reproducing music data, which is music data including sound and music, recorded in a recording medium;
Expansion and reproduction means for expanding and reproducing the audio data, which is the audio data, recorded on the recording medium at a lower bit rate than the music data;
Subtracting means for subtracting the audio data expanded and reproduced by the expansion reproduction means from the music data reproduced by the reproduction means, and outputting music data that is data only of the music;
A music playback device comprising: Reproduction means for reproducing music data, which is music data including voices and songs of N people (N is an integer of 2 or more) recorded on a recording medium,
N decompression reproduction means for decompressing and reproducing the audio data of the N voices recorded on the recording medium at a lower bit rate than the music data;
Subtracting means for subtracting the audio data of N persons expanded and reproduced by the N decompression reproducing means from the music data reproduced by the reproducing means, and outputting music data that is data only of the music;
A music playback device comprising: The music playback device according to claim 1 or 2,
The audio data is recorded on the recording medium at a sampling frequency lower than the sampling frequency of the music data,
The decompression reproduction means decompresses and reproduces the audio data by converting a sampling frequency of the audio data into a sampling frequency of the music data.
A music player characterized by the above. The music playback device according to claim 1 or 2,
The audio data is recorded in the recording medium after the audio data in the time axis region is converted into a frequency band and compressed,
The decompression reproduction means decompresses and reproduces the audio data by converting the compressed audio data into audio data in a time axis region.
A music player characterized by the above. Music data, which is music data including sound and music, is recorded at a predetermined bit rate,
further,
Audio data that is the audio data is recorded at a lower bit rate than the music data,
A recording medium characterized by the above.

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