KR19980023208A - Digital audio signal reproducing apparatus and method for reproducing general music or karaoke music and recording medium thereof - Google Patents

Abstract

end. The technical field to which the invention described in the claims belongs

Digital audio signal reproducing apparatus and method for reproducing general music or karaoke music and recording medium thereof

I. The technical problem that the invention is trying to solve

The recording medium for general music can be used not only for general music but also for karaoke.

All. The gist of the solution of the invention:

The digital audio signal reproducing method of the present invention comprises the steps of alternately recording accompaniment data and voice data, which are sources of general music or karaoke music, one sector on a digital recording medium, and controlling audio reproduction. Responsively processing the accompaniment data and the audio data recorded on the recording medium and storing the accompaniment data and the audio data in the first memory area and the second memory area, and in case of inputting a key corresponding to general music selection or music selection for karaoke. Accommodating the accompaniment data and the audio data recorded in the second memory area together or reading only the accompaniment data to the original uncompressed audio signal, and accommodating the accompaniment data and the audio to the original audio signal when the general music is selected. Audio data is output by mixing data, and only the accompaniment data selected when the music for karaoke is selected is output. The process is done.

la. Important uses of the invention:

Digital audio signal reproducing device

Description

Digital audio signal reproducing apparatus and method for reproducing general music or karaoke music and recording medium thereof

The present invention relates to a signal reproducing apparatus, and more particularly, to a digital audio signal reproducing apparatus and method for reproducing general music or karaoke music, and a recording medium thereof.

An audio device is a device that receives a signal from the signal source in the range of 20Hz to 20KHz that can be heard by the human ear and passes it through the amplifier-speaker to us. Conventional audio component systems have typically consisted of turntables, tuners, cassette tape decks, and speakers. The dual turntable uses LP record discs as the signal source, the tuner uses broadcast propagation from the station, and the cassette tape deck uses analog audio cassette tapes as the source, controlling the signal output from the amplifier and sending the speakers to the speaker. Eventually the sound reaches our ears. These devices have been in the spotlight for the general consumer for a considerable time in the past, but have reached a limit to meet the needs of consumers who are seeking better sound quality.

An alternative to meeting these limitations is the digital audio system. The rougher the analog signal, the greater the influx of noise and the greater its magnitude. However, digital signals are extremely unlikely to alter the original signal due to noise, no matter how many circuits they pass through. Therefore, when a record company records the high-quality recorder and digitalizes it and supplies it to the general consumer, the general consumer can listen to the sound quality of the record studio.

It took quite a while for digital audio with high performance to become commonplace, and endless R & D was conducted by many companies and research institutes. As a result, digital audio devices, which can be replaced with existing analog audio devices, have emerged. Examples of digital audio signal reproducing apparatuses among digital audio devices include CDP (Compact Disc Player), DAT (Digital Audio Tape Recorder), MDP (Mini-Disc Player), and the like. Data is recorded in digital form on the recording medium used by such digital audio signal reproducing apparatus.

On the other hand, among the digital recording media in the market, recording media made of software for music cannot be used for karaoke. Therefore, to use for karaoke, you must use a recording medium made with karaoke software. The software for karaoke means that only the accompaniment of the song is output, not the singer's voice. So people sing along to the accompaniment. A representative example of karaoke software is CD-G. As a result, recording media for general music are used only for general music and recording media for karaoke are used only for karaoke.

However, if the general music recording medium can be used not only for general music but also for karaoke, the general consumer will prefer to use the recording medium.

Accordingly, an object of the present invention is to provide a digital recording medium that can be used not only for general music but also for karaoke.

Another object of the present invention is to provide a digital audio signal reproducing apparatus and method capable of reproducing an audio signal not only for general music but also for karaoke.

1 shows a conventional CD recording contents.

2 shows CD recording contents according to an embodiment of the present invention;

Figure 3 is a block diagram applied to the CDP (Capact Disc Player) to explain an embodiment of the present invention

4 is a detailed block diagram of FIG. 3.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description, it should be noted that like elements are denoted by like reference numerals wherever possible. In addition, detailed descriptions of well-known functions and configurations that may unnecessarily obscure the subject matter of the present invention will be omitted.

In the present invention, a digital recording medium is used. Digitally recorded recording media include CD, MD, DVD, DAT tape, and the like. Representative examples of these recording media may be CDs, and therefore, CD will be described as an example in the embodiment of the present invention.

As mentioned in the technical background of the present invention, a CD is classified into a karaoke CD and a general music CD. In the embodiment of the present invention, the CD is implemented as one CD.

1 is a view showing the contents of a conventional CD recording. In the general music CD, as shown in FIG. 1, the recorded contents are recorded together with audio (song) and accompaniment data. However, only accompaniment data is recorded on the karaoke CD. Therefore, in the present invention, general music that can be used both for karaoke or general music is divided into accompaniment data and voice data and recorded on the CD.

2 shows CD recording contents according to an embodiment of the present invention. Referring to FIG. 2, accompaniment data and audio data are alternately recorded on a CD according to an embodiment of the present invention. The sector is a basic unit for recording data. When the accompaniment data and the audio data are recorded in detail, if the accompaniment data is recorded in the first sector (odd sector), the second sector (excellent sector) records the audio data corresponding to the accompaniment data recorded in the first sector. It is. Accompaniment data of the first sector is continuously recorded in the third sector, and audio data corresponding to the accompaniment data recorded in the third sector is recorded in the fourth sector. In this manner, the accompaniment data is recorded in the odd sector and the audio data corresponding to the accompaniment data of the previous odd sector in the even sector.

However, if accompaniment data and audio data are recorded alternately, the amount of data recorded on the CD will be about twice as large as that of general music recorded with the accompaniment data and audio data. Therefore, in the present invention, the accompaniment data and the audio data to be recorded are compressed using an MPEG audio encoder to record the accompaniment data and the audio data separately and alternately. When compressing data using MPEG audio encoder, it is possible to compress up to 10 times. However, the higher the compression rate, the more likely that one data will be lost. The preferred compression rate according to an embodiment of the present invention is about 2 times.

3 is a block diagram illustrating a CDP (Compact Disc Player) for explaining an embodiment of the present invention. It is to be understood that the CDP block configuration of FIG. 3 omits a known circuit portion, etc., which may unnecessarily obscure the subject matter of the present invention among the block structure of the general CDP.

In Fig. 3, 10 is a CD of the same type as in Fig. 2 in which accompaniment data and audio data compressed by an MPEG audio encoder are recorded alternately. 12 is a pickup unit for picking up data recorded on CD 10, 14 is a DSP (Digital Signal Processor) for CD, and 16 is a system control unit that controls the entire CDP. 15 is a key input unit including a normal key and a karaoke key according to an embodiment of the present invention, 18 is a memory unit having a storage area for storing the accompaniment data and voice data, respectively, 20 is a memory unit 18 An MPEG audio encoder outputs the compressed and uncompressed accompaniment data and the audio data and outputs the original uncompressed accompaniment data and voice data, and 22 is a D / A converter for converting an analog signal into a digital signal. 24 is an audio circuit unit for mixing the accompaniment data and the audio data output from the D / A converter 22 by the control of the system controller 16 or selecting only the accompaniment data from the two data and outputting them as an audio signal to the outside. .

FIG. 4 is a block diagram illustrating the concrete block of FIG. 3. The configuration of the key input unit 15, the memory unit 18, the MPEG audio decoder 20, and the D / A converter 22 of FIG. Referring to FIG. 4, the key input unit 15 includes a normal key 22 and a karaoke key 24 according to an embodiment of the present invention. The normal key 22 is a key used when a user wants to listen to general music, and the karaoke key 24 is a key used when the user outputs karaoke music. The memory unit 18 is divided into an A storage area and a B storage area. In the A storage area, accompaniment data recorded in the odd sector of CD 10 is stored. In the B storage area, audio data written in the even sector of CD 10 is stored. do. The storage control of the memory unit 18 is performed by the system controller 16. The MPEG audio decoder 20 is a first MPEG audio decoder 20-1 for decompressing accompaniment data read out from the A storage area of the memory unit 18 and a second MPEG audio for decompressing audio data read out from the B storage area of the memory unit 18. It consists of the decoder 20-2. The D / A converter 22-1 converts the accompaniment data output from the first MPEG audio decoder 20-1 into an analog signal and outputs the analog signal from the first D / A converter 22-1 and the second MPEG audio decoder 20-2. And a second D / A converter 22-2 for converting the output voice data into an analog signal and outputting the same.

Hereinafter, an operation according to an embodiment of the present invention will be described in detail with reference to FIGS. 3 and 4.

When playback starts under the control of the system controller 16, accompaniment data and audio data recorded alternately in the odd and even sectors of the CD 10 are stored in the memory unit 18 through the pickup unit 12 and the system control unit 16. At this time, the system controller 16 stores the accompaniment data recorded in the odd sector of the CD 10 in the A storage area of the memory unit 18, and stores the audio data recorded in the even sector of the CD 10 in the B storage area of the memory unit 18, respectively.

The system controller 16 also checks whether the user presses the normal key 22 or the karaoke key 24 on the key input unit 15.

First, the operation of the present invention when the user presses the normal key 22 will be described first. When the user presses the normal key 22, the system controller 16 reads accompaniment data stored in the storage A of the memory 18 and voice data stored in the storage B of the memory 18 together. Thereafter, the read accompaniment data is output to the first MPEG audio decoder 20-1, and the read audio data is output to the second MPEG audio decoder 20-2. Accordingly, the first MPEG audio decoder 20-1 expands the accompaniment data read out from the A storage area of the memory unit 18 to make the original uncompressed accompaniment data, and the second MPEG audio decoder 20-2 of the memory unit 18 Voice data read out from the B storage area is decompressed to give the original uncompressed voice data. Accompaniment data output from the first MPEG audio decoder 20-1 is applied to the audio circuit unit 24 via the first D / A converter 22-1, and audio data output from the second MPEG audio decoder 20-2 is the second D. It is applied to the audio circuit section 24 via the / A converter section 22-2. The audio circuit unit 24 mixes the analog accompaniment data and the audio data applied by the first and second D / A converters 22-1 and 22-2 under the control of the system controller 16 to produce general music and output it to the outside. do. Accordingly, the user listens to general music.

Next, the operation of the present invention when the user presses the karaoke key 24 will be described first. When the user presses the karaoke key 22, the system control unit 16 reads only the accompaniment data stored in the A storage area of the memory unit 18. The read-out accompaniment data is then decompressed through the first MPEG audio decoder 20-1, made into uncompressed original accompaniment data, and applied to the first D / A converter 22-1. The first D / A converter 22-1 converts the accompaniment data into an analog signal and outputs it to the audio circuit unit 24. The audio circuit unit 24 selects only the analog accompaniment data output from the first D / A converter 22-1 under the control of the system controller 16 and outputs the external accompaniment data. As a result, only the accompaniment is output to the speakers.

In the above description of the present invention, specific embodiments applied to the CDP have been described, but various modifications can be made without departing from the scope of the present invention. That is, embodiments of the present invention are all devices capable of digitally reproducing an audio signal, for example, MDP (Mini-Disc Player), DVDP (Digital Video Disc Player), DAT (Digital Audio Tape Recorder), and DCC (Digital). Applicable to both Compact Cassette). Therefore, the scope of the present invention should not be defined by the described embodiments, but should be defined by the equivalents of the claims and the claims.

As described above, the present invention can be used not only for general music but also for karaoke as one recording medium, and can be used not only for general music but also for karaoke music according to a user's selection.

Claims (5)

In the digital audio signal reproducing apparatus, A system controller for controlling the overall operation of the digital audio signal reproducing apparatus; A digital recording medium in which compressed digital accompaniment data and audio data are alternately recorded one sector at a time; A signal processing unit which reads and reproduces accompaniment data and audio data recorded on the recording medium; Key input section including key to select general music or karaoke music, A memory unit for storing the compressed digital accompaniment data reproduced by the signal processor in a first storage area and controlling the compressed digital voice data in a second storage area under the control of the system controller; Compressed digital output from the first and second storage areas of the memory unit or one of two storage areas based on a memory lead selection control of the system controller corresponding to a key input corresponding to the general music or karaoke music. A digital audio signal reproducing apparatus comprising: a data decompressing unit for decompressing and outputting data into an original signal. The method of claim 1, wherein the data decompression unit A first MPEG audio decoder which extends and outputs the compressed accompaniment data output from the first storage region of the memory unit to the original signal; And a second MPEG audio decoder which expands and outputs the compressed audio data output from the second storage area of the memory unit. The method of claim 2, wherein the accompaniment data output from the first MP audio decoder and the voice data output from the second MP audio decoder are mixed under control of the system controller according to the general music selection key input. A digital audio signal reproducing apparatus, further comprising a mixing unit for outputting. In the digital audio signal reproduction method, Compressing accompaniment data and voice data, which are sources of general music or karaoke music, alternately recording sector by piece on a digital recording medium; Reproducing the accompaniment data and the audio data recorded on the recording medium in response to the audio reproduction control and storing the accompaniment data and the audio data in the first memory area and the second memory area; The process of extending accompaniment of the accompaniment data and voice data recorded in the first and second memory areas together with or reading only the accompaniment data to the original uncompressed audio signal when a key input corresponding to general music selection or karaoke music selection is performed. and, And mixing the accompaniment data and the voice data extended to the original audio signal when the general music is selected, and outputting only the selected accompaniment data when the music for karaoke is selected. In the recording medium for reproducing general music and karaoke music using one recording medium, And a digital recording medium in which compressed digital accompaniment data and audio data are alternately recorded one sector at a time.