KR19980039968A - Scoring device when the song accompaniment function of the video compact disc player - Google Patents

Abstract

The present invention relates to a scoring apparatus in the song accompaniment function of a video compact disc player. To this end, the present invention is a mono / stereo bit constituting the audio coding information bytes of a predetermined disc to be reproduced for the song accompaniment function, the user according to the accompaniment generated from the disc. The data indicating the point at which the song should be sung and the point at which the song should be stopped is pre-recorded, and the microphone 200 for outputting an audio signal generated by a user singing a song when the song accompaniment function is executed through a predetermined process such as amplification is performed. And a comparator 210 for comparing and processing the audio signal provided from the microphone 200 with a preset reference level signal and outputting the digital signal as a digital signal corresponding to '0' or '1', and a digital signal processor. From 60, the spare bit of the mono / stereo bit is read out of the data reproduced from the disc, and the reserved bit signal and the ratio It includes a microcomputer 220, which marks the score by comparing the output signal of unit 210, and configuration.

Therefore, the present invention has the effect of scoring the score for the beat of the song that the user sings in the song accompaniment function by using the spare bits of the mono / stereo information bits constituting the audio coding information byte.

Description

Scoring device when the song accompaniment function of the video compact disc player

The present invention relates to a song accompaniment function of a video compact disc, and more particularly, to a scoring apparatus for a song accompaniment function of a video compact disc player capable of scoring a score by a beat when performing a song accompaniment function in a video compact disc player.

With the development of audio and video media, optical disc players for recording and reproducing video and audio data on semi-permanent optical discs have been developed.

Such an optical disc player reproduces an image and / or audio recorded on an optical disc and outputs it through a screen and / or a speaker, and has a higher signal-to-noise ratio than conventional image and / or audio reproducing apparatus, resulting in better image quality and / or Or it can reproduce the signal with sound quality, it does not generate noise due to irregular reproduction and modulation, very low distortion, no ghost and random access, so it is rapidly developed and widely distributed. There is a trend.

In addition, such an optical disk player includes a compact disk player (CDP), a laser disk player (LDP), a compact disk graphic player (CDGP), and a video compact disk player (VCDP: video compact disk player) has been developed and widely used. Also, recently, a digital video disk (DVD) using MPEG-2 moving picture compression technology and a digital video disk player for playing the same have been developed. It can record and play back gigabytes (GB) of data including moving images on a 12cm optical disc such as a CD, and it is also designed to be compatible to play current CDs and VCDs.

On the other hand, among such optical disc players, the video compact disc player has a built-in song accompaniment function. The song accompaniment function records accompaniment signals and lyrics data for a predetermined song on a disc, and displays and transmits them during playback. By doing this, the user can refer to this and sing.

In addition, the song accompaniment function is widely used by adding a scoring function for comparing the audio signal to be played by the user and the accompaniment signal to be played and scoring the score according to whether or not the song is matched.

On the other hand, Fig. 2 is a diagram showing the configuration of audio coding information bytes recorded on the disc.

As shown in Fig. 2, the audio coding information byte includes one bit of reserved bits, one bit of an emphasis bit, two bits representing bits per sample, It consists of a bit representing a sampling frequency of two bits and a bit representing a mono / stereo of two bits.

Among these, two bits representing mono / stereo represent mono when the data is '00', stereo when '01', and '10' and '11' bits are designated as reserved bits and are defined as predetermined bits. It is configured to be used depending on the function and needs.

Therefore, these reserved bits of '10' and '11' can be designated and recorded respectively as a time point at which a song should be sung and a time point at which a song should not be sung.

Accordingly, the present invention has been conceived from this point of view, and an object of the present invention is to sing a song that a user sings by comparing a voice signal input by the user using a spare bit of mono / stereo bits of the audio coding information byte in the song accompaniment function. In the song accompaniment function of a video compact disc player to score a score is provided.

According to a preferred embodiment of the present invention for achieving this purpose, the pickup and actuator unit, RF (radio frequency) signal amplification and servo signal processing unit, motor driver 30, key input unit, digital signal processing unit, MPEG decoder, audio signal An apparatus for scoring a score of a song that a user sings when executing a song accompaniment function in a video compact disc player including a processor, a video signal processor, a speaker, and a screen, the predetermined disc being played for the song accompaniment function. In the spare bits of the mono / stereo bits constituting the audio coding information byte of the data, data indicating when the user should sing a song and when the song should be stopped according to the accompaniment played back from the disc. When the song accompaniment function is executed, the user calls a song The microphone outputs the audio signal generated through a predetermined process such as amplification and the like, and the audio signal provided from the microphone is compared with a preset reference level signal, and then processed according to a '0' or '1'. A comparator for outputting as a digital signal and a spare bit of the mono / stereo bit among the data reproduced from the disc from the digital signal processor, and comparing the spare bit signal with an output signal of the comparator to compare the two data. It consists of a microcomputer that scores a score by counting and accumulating the number of matches or discrepancies.

1 is a schematic block diagram of a typical video compact disc player

2 is a diagram showing the configuration of audio coding information bytes recorded on a disc.

3 is a block diagram showing a scoring apparatus for a song accompaniment function of a video compact disc player according to a preferred embodiment of the present invention;

4 is a waveform diagram showing an audio signal input by a user when a song accompaniment function is executed and an output signal passing through a comparison unit according to the present invention;

<Description of the code | symbol about the principal part of drawing>

10: Pickup and Actuator

20: RF signal amplification and servo signal processing unit

30: motor drive unit 40: key input unit

50,220: microcomputer 60: digital signal processing unit

70: MPEG decoder 80: Audio signal processor

90: video signal processing unit 100: speaker

110: screen 200: microphone

210: comparison unit R: resistance

C: Capacitor OP: Operational Amplifier

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a schematic block diagram of a video compact disc player that performs a general song accompaniment function.

As shown in FIG. 1, a typical video compact disc player includes a pickup and actuator unit 10, an RF (radio frequency) signal amplification and servo signal processor 20, a motor driver 30, a key input unit 40, a microcomputer ( 50, a digital signal processor 60, an MPEG decoder 70, an audio signal processor 80, a video signal processor 90, a speaker 100, and a screen 110.

The pickup and actuator unit 10 executes an optical pickup from a disc loaded in a disc tray (not shown) and outputs an RF signal which is read accordingly.

In addition, the motor driving unit 30 drives the spindle motor (not shown) to rotate the disk, and drives the actuator unit 10 so that the pickup unit 10 performs optical pickup to read the data recorded on the disk to RF Output as a signal.

The RF signal amplification and servo signal processing unit 20 amplifies an RF signal provided from the pickup and actuator unit 10 and provides a servo control signal according to the signal to the motor driving unit so that the focus servo and the tracking servo are performed.

The digital signal processing unit 60 digitally processes the amplified RF signal provided from the RF signal amplification and servo signal processing unit 20, performs error detection and error correction, and outputs the result to the MPEG decoder 70.

The MPEG decoder 70 decodes an error corrected digital video signal and an audio signal provided from the digital signal processor 60 based on the MPEG compression format and outputs the decoded video signal to the video signal processor 90 and the audio signal processor 80. .

The audio signal processing unit 80 and the video signal processing unit 90 process the decoded audio and video signals provided from the MPEG decoder 70 and output them to the speaker 100 and the screen 110, respectively. And the screen 110 are displayed as an audio and an image, respectively.

Meanwhile, according to the present invention, the reserved bits of the mono / stereo bits of the audio coding information byte of the disc loaded and reproduced on the disc tray for the song accompaniment function include data on when to sing and when not to sing. Is recorded. That is, for example, a reserved bit of the mono / stereo bit of the audio coding information byte may be recorded as '11' at the time when a song should be sung, and as '10' when a song should not be sung. At this time, since all of the upper bits are the same as '1', it is possible to determine when the song should be sung and when it should not be sung by reading '1' or '0' of the lower bit during playback.

3 is a block diagram showing a scoring apparatus for a song accompaniment function of a video compact disc player according to a preferred embodiment of the present invention.

As described above, when the song accompaniment function key signal is input from the key input unit 40, the disc is played and the song accompaniment function is executed to input an audio signal for a song that the user sings according to the accompaniment. The analog signal as shown in FIG. 4 is provided to the comparator 210 through a process of amplifying the audio signal to a predetermined level.

Then, the comparator 210 composed of the resistors R1, R2, R3, the condenser C, and the operational amplifier OP compares a preset reference level with an input analog audio signal, as shown in FIG. 4. Outputs the same digital waveform signal. That is, the comparator 210 converts all of the input audio signals to '0' when the input audio signal is '0' or less, and converts them to '1' when the input audio signal is greater than '0' and provides them to the microcomputer 220.

Accordingly, the microcomputer 220 reads '11' or '10' data, which is recorded and reproduced in the reserved bits of the mono / stereo bits of the audio coding information byte, from the digital signal processing unit 60, and thus, '1' or the lower bit. The value of '0' is read and compared with the digital signal provided from the comparator 210 to score a score for a song that the user sings. That is, the microcomputer 220 drives the built-in timer (not shown) when the lower bit of the preliminary bit read out from the digital signal processor 60 matches the digital signal provided from the comparator 210 to display the number of times. By counting and accumulating until the song is finished, the user scores the song. That is, it is possible to accurately determine whether the accompaniment being played and the beat of the song that the user sings are scored.

As described above, the present invention has the effect of scoring the score of the beat of the song that the user sings during the song accompaniment function by using the reserved bits of the mono / stereo information bits constituting the audio coding information byte.

Claims (1)

Pick-up and actuator unit 10, RF (radio frequency) signal amplification and servo signal processing unit 20, motor driver 30, key input unit 40, digital signal processing unit 60, MPEG decoder 70, audio signal In the video compact disc player including the processing unit 80, the video signal processing unit 90, the speaker 100, and the screen 110, the apparatus for scoring the score of the song that the user sings when performing the song accompaniment function , In the spare bits of the mono / stereo bit constituting the audio coding information byte of a predetermined disc to be reproduced for the song accompaniment function, the user should sing a song according to the accompaniment played from the disc. Data indicating when to play and when to stop the song is recorded, A microphone 200 for outputting an audio signal generated by a user singing a song when performing the song accompaniment function through a predetermined process such as amplification; A comparator 210 for comparing the audio signal provided from the microphone 200 with a preset reference level signal, processing the audio signal, and outputting the digital signal corresponding to '0' or '1'; The preliminary bit of the mono / stereo bit is read out of the data reproduced from the disc by the digital signal processor 60, and the coincidence between the two data is compared by comparing the preliminary bit signal with the output signal of the comparator 210. Or a microcomputer 220 for scoring a score by counting and accumulating the number of discrepancies.