JP3017256B2 - Information playback device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information reproducing apparatus, and more particularly to an audio information reproducing apparatus suitable for karaoke performance.

[Conventional technology]

2. Description of the Related Art Conventionally, as a karaoke apparatus, a type in which accompaniment music is reproduced by playing an information recording medium such as a magnetic tape or a video disk on which only accompaniment music is recorded is known. These karaoke apparatuses can mix, control, amplify and output the vocal sound portion and the accompaniment music portion input from the microphone by externally connecting an amplifier, a microphone, a speaker, and the like.

[Problems to be solved by the invention]

In these karaoke apparatuses, when the user sings the lyrics of the vocal part, the user has to sing the lyrics while confirming the lyrics on a lyrics card, subtitles on a video screen, or the like.

However, the user may want to use the karaoke device in a passenger car. In such a case, it is convenient if the user can be informed of the lyrics without a lyrics card or the like. In addition, depending on the type of accompaniment music of karaoke, the timing of the beginning of singing a song may be unclear. In this case, it is more convenient if the user can be notified of the timing of starting the singing.

SUMMARY OF THE INVENTION An object of the present invention is to provide an information reproducing apparatus capable of informing a user of information such as lyrics by a method other than a visual method.

[Means for solving the problem]

In order to solve the above problem, the invention according to claim 1 includes a first recording area in which first information including at least leading voice information for leading lyrics corresponding to accompaniment music information is recorded. A second recording area in which second information including only the accompaniment music information is recorded.
An information reproducing apparatus for reproducing either the first information or the second information from an information recording medium such as an optical disc, wherein the optical apparatus reads one of the first information and the second information from the information recording medium An information reading means such as a pickup, an information demodulating means such as a CD-ROM decoder for demodulating either the read first information or the second information into an audio signal, and an external instruction for inputting an instruction. An input unit such as an external input unit, and a control unit such as a system controller that selects and executes one of reproduction of the first information and reproduction of the second information based on the input instruction. Prepare.

According to a second aspect of the present invention, in the information reproducing apparatus according to the first aspect, the first information and the second information are multiplexed and recorded on the information recording medium.

[Action]

According to the first aspect of the present invention, the information reading means includes: a first recording area in which first information including at least leading voice information for leading lyrics corresponding to the accompaniment music information is recorded; One of the first information and the second information from an information recording medium having a second recording area in which second information including the accompaniment music information is recorded.

Then, the information demodulating means demodulates one of the read first information and the second information into an audio signal.

At this time, the input means is used to input an external instruction.

Thus, the control means selects and executes one of the reproduction of the first information and the reproduction of the second information based on the input instruction.

Therefore, the first information including at least the leading voice information for leading the lyrics corresponding to the accompaniment music information can be selectively reproduced, so that the information including at least the lyrics to be sung to the user can be visualized. Can be notified by a method other than sound.

In addition, since the second information including only the accompaniment music information and the first information can be selectively reproduced, both the user who needs the leading voice information and the user who needs only the accompaniment music information can perform the reproduction. One information reproducing apparatus can be shared.

According to the second aspect of the invention, in addition to the operation of the first aspect, the first information and the second information are multiplexed and recorded on the information recording medium. 1
Even in the case of reproducing the information by continuously switching the reproduction of the second information to the reproduction of the second information, it is possible to quickly search each information and reproduce both of them without waiting time.

〔Example〕

First Embodiment FIG. 1 shows a data structure of a CD-ROMXA disc which is a first embodiment of the information recording medium according to the present invention.

The CD-ROM is a medium that uses a CD established as a digital audio disk as a read-only memory (abbreviated to ROM) of digital information. Standards were established in 1985 and are now being applied to various fields. Features of CD-ROM include large recording capacity, high reliability, high accessibility, possibility of mass copying,
Inexpensiveness of the reproduction system and the like can be mentioned.

The format embodied as a format based on this CD-ROM is CD-I (abbreviation for CD-Interactive).
And CD-ROMXA. Both can record and reproduce voice / sound information and image information. Both voice / sound information can be recorded by adaptive differential pulse code modulation (hereinafter referred to as ADPCM. ADPCM: Adptive Differential Pulse Code Modulati).
(abbreviation of on). (See Nikkei Electronics May 15, 1989, No. 473, pp. 195-200.) FIG. 1 shows a data sector structure which is a storage area of the CD-ROMXA disk.

In the case of the CD signal format, 98 frames of the subcode are treated as one block, and one block corresponds to 1/75 second. Therefore, 44.1 × 10 ³ × 16 × 2 × 1/75 × 1/8 = 23
From 52, 2352 bytes of data can be recorded in one block of the CD. Here, 44.1 × 10 ³ is the sampling frequency, 16 is the quantization number, 2 is the stereo L and R, 1/75 is the time (second), and 1/8 is the bit and byte conversion rate. Represents.

In the CD-ROM XA, user data is recorded in each sector with one block as one sector. There are Mode1 and Mode2 standards depending on the size of the user data area, etc.
There are two standards for Form1 and Form2, but the CD-R of the first embodiment
In the storage area 11 of the OMXA, the volume descriptor employs Mode1 and the image information and audio information adopt Form2 of Mode2.

In Figure 1, a track T in the storage area 11 of the CD-ROMXA includes a volume descriptor T _D, sector
It has T _{1 to} T _m and a gap _TG . Volume Descriptor T _D is an identification code, flag, part that stores startup directory, etc. indicating the CD-ROMXA. Sectors T _{1 to} T _m (eg, T _k )
And _SYNC, header S _H, a subheader S _SH and user data S
_UD and an error detection code section _SEDC . Sync S
_{The SYNC} is 12 bytes and stores a signal for dividing a sector. The header _SH is 4 bytes, of which 3
The byte stores the same address information as the subcode of the CD, and the remaining one byte stores the mode information. The sub-header S _SH is 8 bytes, and has a file number H ₁ and
A channel number H _2, a sub-mode H _3, and a coding formation H _4. Each item H ₁ ~H ₄
Are 1 byte each, and are written twice (repeated twice).

User data S _UD is 2324 bytes in Form2, and a data unit U ₁ ~U _n spare unit U _SP. Figure 1 is a data unit U ₁ ~U _n are each 128 bytes, the spare unit U _SP indicates an example of 20 bytes.
Therefore, in this case, n = 18. The data units U _{1 to} U ₁₈ have a total of 2304 bytes. The error detection code section _SEDC is composed of 4 bytes. In the data unit, a speech / sound signal is encoded and stored by the ADPCM method.

The principle of ADPCM is shown in FIG. First, the current input signal is predicted from the past input signal by the adaptive predictor D, and the difference e (= xy) between the predicted signal y and the current input signal x is calculated.
The computed by the subtractor S _T. Next, the difference e is quantized by the adaptive quantizer Q with a plurality of bits and encoded into Ce.
Playback is the reverse of the above. That is, the coded signal Ce is returned to the difference e by the adaptive inverse quantizer Q- ¹ . Next, the signal y predicted by the adaptive predictor D and the difference e are added by an adder _AD to obtain an output signal x.

In the ADPCM system, efficient storage of audio data is possible with a small number of bits. Audio characteristics also differ depending on the bit saving rate (data compression rate). Fig. 3 shows AD
This shows the relationship between PCM and audio characteristics. As can be seen from FIG. 3, the A-level bit savings are 1/2 for stereo storage and 1/4 for monaural storage. The B-level bit savings are 1/4 for stereo storage and 1/8 for monaural storage. At the C level, the ratio is 1/8 for stereo storage and 1/16 for monaural storage. A bit saving rate of, for example, 1/4 means that it is only 1/4 of the conventional recording capacity, and the remaining 3/4 can be used for storing other data.

In FIG. 1, each data unit U _i has 128 bytes, and the data unit U _i has a sound parameter part P _i
And a ADPCM sample data unit D _i and. The sound parameter section _Pi is 16 bytes and stores the modulus of the prediction filter of the adaptive predictor D of ADPCM shown in FIG. Capacity of ADPCM sample data unit D _i is 112 bytes, data sampled at ADPCM are stored. Therefore, in one entire sector, 2016 bytes (= 112
× 18). Assuming that ADPCM is B
If the level is stored in stereo, 37.8 × 10 ³ × 4 × 2 × 1/75 × 1/8 = 504, the number of bytes required for storage is 504 bytes.

Therefore, since 2016 ÷ 504 = 4, four times the data can be stored as compared with the normal storage method. That is, in the case of B-level stereo storage, audio for four channels in total
Acoustic signals can be stored. In this case, the first channel is stored in sectors T ₁ , T ₅ , T ₉ ,... T _{4h + 1} . Here, h is an integer of 0 or more. The second channel is a sector _{T 2, T 6, T 10} , ... to the T _{4h + 2,} third channel sectors _{T 3, T 7, T 11} , ... to the T _{4h + 3,} and the fourth channel sector T ₄ , T ₈ , T ₁₂ ,..., T _{4h + 4} .

Now, in a data unit U _i of a certain sector T _i , AD
The PCM sample data unit D _i, and stores the karaoke signal b _i converted accompaniment music information in which accompaniment music (Karaoke music) into a digital signal. Then, the ADPCM sample data unit D _j of the data unit U _j of other sectors T _j, identical karaoke signal b _i and karaoke signal b _i of D _i, and the read voice signal g _i, a leading audio information It is remembered. Lead Voice signal g _i is a signal obtained by converting the read voice uttered the lyrics to a digital signal. That is, only the karaoke signal is stored in the first channel sectors T ₁ , T ₅ , T ₉ ,... T _{4h + 1} , and the second channel sectors T ₂ , T ₆ , T _6
10 ,... T _{4h + 2} store the karaoke signal and the read voice signal.

Second Embodiment Next, FIG. 4 shows a configuration of a karaoke apparatus which is a second embodiment of the information reproducing apparatus according to the present invention.

In FIG. 4, the karaoke apparatus 61 includes an optical pickup 41 as information reading means, a demodulation block 51 as information demodulation means, a spindle motor 611, a control block 31 as control means, and an external terminal 612. It has.

The demodulation block 51 includes a waveform shaping circuit 511, a digital signal processing unit 512, a RAM 513, a CD-ROM decoder 514,
It has an AM 515, an ADPCM decoder 516, a RAM 517, a D / A converter 518, and a low-pass filter 519.

The control block 31 includes a system controller 311, a servo circuit 312, and an external input unit 313.

Further, an external amplifier AMP can be connected to the external terminal 612. The external amplifier AMP has an external microphone MC,
And an external speaker SP.

 Next, the operation of the karaoke apparatus will be described.

First, the CD-ROM disk 21 is rotated by the spindle motor 611. The optical pickup 41 reads a digital signal from the recording surface of the compact disc 21. The digital signal φ ₁ read by the optical pickup 41 is
Subjected to waveform shaping by the waveform shaping circuit 511 is input as a signal phi ₂ to the digital signal processor 512. The digital signal processing unit 512 first detects an edge of the EFM signal using a reference clock generated by a crystal, and reproduces a data string. Then, a frame synchronization signal is detected from the data sequence, and the configuration of the frame data is accurately reproduced based on the synchronization signal. The frame data is subjected to EFM demodulation to become 8-bit symbol data, which is written to the RAM 513. Next, the data stored in the RAM 513 is deinterleaved. Then, error correction processing is performed, and outputs it as the signal phi ₃ to the CD-ROM decoder 514. In the CD-ROM decoder 514, first, an address is searched for based on the absolute time of the subcode, a sync in the data is detected, and the scramble is released. Next, the header address is checked, and the target sector is accessed. The obtained user data is used for error detection,
After-corrected, is output as a signal phi ₄ to ADPCM decoder 516. ADPCM decoder 516, adaptive inverse quantizer and an adaptive predictor (not shown), transmits a signal phi ₄ as a decoded signal phi ₅ decodes the digital signal to the D / A converter 518.

D / A converter 518 sends the decoded signal phi ₅ to the low-pass filter 519 as the signal phi ₆ is converted into an analog quantity. Low pass filter 519, and outputs to the external terminal 612 a signal phi ₆ as an accurate analog signal phi _7. On the other hand, based on the subcode signal φ ₈ obtained from the digital signal processing unit 512 and the like,
The system controller 311 outputs a control signal phi ₉ for controlling the servo circuit 312 of the spindle motor 611 and the optical pickup 41.

An analog signal φ which is an output signal of the karaoke apparatus 61
₇ is input to the external amplifier AMP. Further, On the other hand, the audio that is input to the external microphone MC is input as a microphone speech signal phi ₁₀ to the external amplifier AMP. External amplifier AMP is mixed with the microphone audio signals phi ₁₀ with adjusting the frequency characteristic of the analog signal phi _7, and outputs a signal phi ₁₁ to the external speaker SP is amplified to an appropriate level. External speaker SP outputs the signal phi ₁₁ inputted as a sound. On the other hand, the system controller 311 controls each unit of the karaoke apparatus 61, that is, the digital signal processing unit 512, the CD-ROM decoder 514, and the ADPCM decoder 516 by a control input from the external input unit 313 or a built-in program or the like. controlled by the control signal φ ₁₂ ~φ _14.

Next, the operation of the present invention will be described with reference to FIGS.

First, the spindle motor 611 is rotated by the external input unit 313. The optical pickup 41 reads a digital signal stored in the storage area of the CD-ROM XA data sector 11.

The storage area, digital as shown in FIG. 1, sector T _j of the data unit U _j karaoke signal b _i obtained by converting the accompaniment music to digital signals in, and those generated lyrics to sing in the musical accompaniment lead voice signal g _i obtained by converting the signal is stored. In case of reproducing only the karaoke song, for example, karaoke signals b _i stored in the ADPCM sample data unit D _i of the data unit U _i of FIG. 1 are reproduced. Here, the external input unit 313, such place an operation instruction to read data units U _j by switching operation, the control signal from the system controller 311, karaoke stored in ADPCM sample data unit U _j of the data unit U _j A read voice signal g _i that utters the lyrics to be sung immediately after that together with the signal b _i is reproduced and output. The singer who is the user of the karaoke apparatus 61 can know the lyrics to be sung immediately after the lead voice that generates the lyrics as the leading voice information, and matches the accompaniment music as the information with the accompaniment music as the information. By singing the lyrics, the lyrics can be sung accurately. In this manner, karaoke with lead voice can be performed, and the user can switch between karaoke with lead voice and normal karaoke for playback.

In the above embodiment, the case where the accompaniment music information is the accompaniment music for karaoke and the leading voice information is the lyrics, but this is for a play or literary work in which the accompaniment music information is background sound and the leading voice information is a line. It may be a recitation or scripture recitation or a combination thereof. Examples include folk songs, musicals, operas, operettas, dramas, movies, French sutras, and the like.

Further, in the above embodiment, the case where the content of the lead voice, which is the leading voice information, is the lyrics of the karaoke song is explained. However, this is the guide vocal singing ahead of the phrase portion, the timing of starting the singing of the karaoke song. ,
It may be the tempo of the song, the strength of the singing voice to be sung, notes on singing, or a combination thereof.

In the case of a lead voice for lyrics, the lead voice may include a plurality of lead voices for a plurality of people to sing, such as a duet of a man and a woman. In this case, it may include duplicate plurality of lead voice signal into the L and R channels are the same and each lead voice signal b _i, to record the read voice signal for men Part example, L channel , R channel, a lead voice signal for a female part may be recorded.

Further, the lyrics may be not only Japanese but also foreign languages such as English, German, French, Chinese, Korean, Spanish, Italian, Portuguese, and Russian.

And as information recording media, ordinary CD, DAT, IC
It is also possible to use cards, various ROMs, and the like.

In the case of a CD-ROM, the CD-I standard can be used.

〔The invention's effect〕

As described above, according to the first aspect of the present invention, the first information including at least the leading voice information for leading the lyrics corresponding to the accompaniment music information can be selectively reproduced. Can be notified of information including at least the lyrics to be sung by a sound method other than the visual method.

Therefore, it is convenient when there is no lyrics card or the like, when a plurality of people sing and the lyrics card or the like does not reach all, when practicing the song, etc., and is particularly suitable for use in a passenger car. .

Further, since the second information including only the accompaniment music information and the first information can be selectively reproduced, both the user who needs the leading audio information and the user who needs only the accompaniment music information can perform the reproduction. One information reproducing apparatus can be shared, and the convenience as the information reproducing apparatus is improved.

In addition, the range of software that can be used is not limited to songs, but it is also possible to read plays, literary works, reciting scriptures, etc.The content to be uttered is not limited to lyrics, the timing of the beginning of singing songs, the tempo of songs. The strength of singing voice, other singing notes, and software other than singing can be used to utter the content information related to the voice in the software, so it can be widely applied to entertainment / playing equipment and learning / educational equipment. It has the advantage of being possible.

According to the second aspect of the invention, in addition to the effect of the first aspect, the first information and the second information are multiplexed and recorded on the information recording medium. Even when the reproduction of the information and the reproduction of the second information are continuously switched and reproduced, it is possible to quickly retrieve each information and reproduce both without the waiting time.

That is, specifically, even for the same song, there is an advantage that it is possible to instantaneously switch between karaoke with a lead voice and karaoke without a normal lead voice.

[Brief description of the drawings]

FIG. 1 is a diagram showing a data structure of a CD-ROMXA disk according to a first embodiment, FIG. 2 is a diagram explaining the principle of the ADPCM system, FIG. 3 is a diagram showing a relationship between ADPCM and audio characteristics, FIG. 4 is a diagram showing a configuration of a karaoke apparatus according to a second embodiment. 11: Storage area of CD-ROM XA, 21: CD-ROM disk,
31 …… Control block, 41 …… Optical pickup, 51…
... demodulation block, 61 ... karaoke apparatus, 311 ... system controller, 312 ... servo circuit, 511 ... waveform shaping circuit, 512 ... digital signal processing unit, 513 ... RAM, 514
…… CD-ROM decoder, 515… RAM, 516… ADPCM decoder, 517… RAM, 518… D / A converter, 519 …… Low-pass filter, 611 …… Spindle motor, 612 …… External terminal, A _D …… Adder, AMP …… External amplifier, b _{1 to} b _n …
... karaoke signal, C _e ...... coded signal, D ...... adaptive predictor, D _i ADPCM sample data unit, g ₁ ~g _n ...... read voice signal, M ...... external microphone, Q ...... adaptive quantizer , Q ^-1 ... adaptive inverse quantizer, S _{1 to} S _n ... section, S
_EDC ...... error detection code portion, S _H ...... header, S _SH ...... subheader, S _sync ...... sink, S _T ...... subtractor, S _UD ...... user data, T ...... track, T ₁ through T _m …… Sector, T _D ……
Volume disk Ributa, T _G ...... gap, U ₁ ~U _n
…… Data unit, U _SP …… Spare unit, φ _{1 to} φ
₁₄ ... signal.

Continuation of the front page (56) References JP-A-63-74167 (JP, A) JP-A-59-5615 (JP, U) JP-A-59-1115 (JP, U) JP-A-58-75390 (JP, U) , U) (58) Fields investigated (Int. Cl. ⁷ , DB name) G11B 20/00-20/02 G10K 15/04 302

Claims (2)

(57) [Claims] 1. A first recording area in which first information including at least leading voice information for leading lyrics corresponding to accompaniment music information is recorded, and second information including only the accompaniment music information is recorded. An information reproducing apparatus for reproducing any one of the first information and the second information from an information recording medium having a second recording area, wherein the first information or the second information is read from the information recording medium. Information reading means for reading any one of the second information; information demodulating means for demodulating either the read first information or the second information into an audio signal; and an input for inputting an external instruction An information reproducing apparatus, comprising: a control unit configured to select and execute one of reproduction of the first information and reproduction of the second information based on the input instruction. 2. The information reproducing apparatus according to claim 1, wherein the first information and the second information are multiplexed and recorded on the information recording medium. .