KR19980039967A - How to Accompani a Song on a Video Compact Disc Player - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a song accompaniment method of a video compact disc player, wherein a song is written to a reserved bit of picture coding bits constituting each video coding information byte of a predetermined disc to be played for performing a song accompaniment function. The start and song stop data is pre-recorded as 3 bits of data, the data is detected, and the song start notice processing and the song stop notice processing are executed according to the data values.

To this end, the present invention comprises the steps of: (a) reading a pre-coding bit of a picture coding bit recorded on the disc and determining whether the spare bit is a song start bit when reproduction is performed in song accompaniment mode; If the preliminary bit read in step) is a song start bit, performing a song start preliminary processing; (c) determining whether the preliminary bit read in step (a) is a song stop bit if the preliminary bit read in step (a) is not a song start bit; D) if the reserved bit is a song stop bit in step (c), executing the song stop notification process; and (e) repeating steps (a) to (d) until the song for performing song song accompaniment ends. It includes and consists of steps.

Therefore, the present invention has an advantage of allowing a user to recognize a time when a song starts and a time when a song stops when the song accompaniment function is executed.

Description

How to Accompani a Song in Video Compact Disc Player

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a song accompaniment method of a video compact disc player, and more particularly, to the use of spare bits of picture coding data recorded in video coding information bytes in a subheader. The present invention relates to a method of accommodating songs in a video compact disc player that can recognize a start and a stop part to a user.

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 these optical disc players, the video compact disc player has a built-in song accompaniment function, which is an audio accompaniment signal played by recording accompaniment data and song lyrics for a predetermined song on a disc and played back the song displayed on the screen. As a function that allows a user to sing along with the lyrics, it is now widely used.

By the way, in the song accompaniment function, if the user is fully acquainted with the beat about the song that the user wants to sing, there is no difficulty in singing along with the song, but if the accompaniment for the song is not fully understood, the accompaniment is performed. There was some difficulty in singing according to.

2 is a diagram showing the configuration of video coding information bytes in a subheader area of data recorded on a disc.

As shown in FIG. 2, the video coding information byte is composed of bits representing resolution and bits representing picture coding.

Three bits representing double picture coding indicate that the data value is coded in one color per pixel when '001', four colors per pixel when '010', and 16 colors per pixel when '011'. '100' indicates coded at 256 colors per pixel. Finally, there is a reserved bit indicated by 'xxx', which is a bit available depending on the needs of use.

Accordingly, the present invention has been made in view of the above, and an object of the present invention is to provide a user with a song start part and a song stop part during song accompaniment using spare bits of picture coding bits of a video coding information byte. The present invention provides a method for accommodating songs in a video compact disc player.

According to a preferred embodiment of the present invention for achieving the above object, in the song accompaniment method of the video compact disc player to display the start and stop parts of the song to the user when the song accompaniment function is executed in the video compact disc player Song start and song stop data are pre-recorded as 3-bit data in the reserved bits of the picture coding bits constituting each video coding information byte of a predetermined disc to be reproduced to execute the song accompaniment function. (A) reading the preliminary bits of the picture coding bits recorded on the disc and determining whether the preliminary bits are song start bits when (a) the song accompaniment mode is set and playback is performed; If the preliminary beat read from is a song start bit, And (c) determining whether the reserved bit read out in the step (a) is a song stop bit if the reserved bit is not a song start bit; and (d) if the spare bit is a song stop bit in the step (c), Performing the song stop notification process; and (e) repeating steps (a) to (d) until the song for performing the song song accompaniment ends.

1 is a schematic block diagram of a typical video compact disc player for practicing the present invention.

2 illustrates the structure of a video coding information byte.

3 is a flowchart of a song accompaniment method of a video compact disc player according to a preferred embodiment of the present invention.

4 is a diagram showing a timing bar displayed on a screen for executing a song accompaniment method of a video compact disc player 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: microcomputer 60: digital signal processing part

70: MPEG decoder 80: Audio signal processor

90: video signal processing unit 100: speaker

110: Screen

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 for practicing the present invention.

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

On the other hand, according to the present invention, when playback is performed on a predetermined disc on which song accompaniment data is recorded, the microcomputer 50 records video coding recorded in a subheader area of data reproduced from the digital signal processing unit 60. The preliminary bits of the picture coding bits constituting the information byte are read to read and recognize the song start information and the song stop information. That is, for example, when a spare bit of a picture coding bit is read as '111', the video signal processor 90 may store pre-stored data and control signals for recognizing that the data is song start data and displaying the data. Occurs.

Accordingly, the video signal processor 90 processes the data provided from the microcomputer 50 on-screen display (OSD) and outputs the data to the screen 110 to be displayed on the screen, which is a timing in a predetermined area of the screen 110. It is displayed in the form of a timing bar. For example, as shown in FIG. 4, four timing bars appearing in the upper left corner of the screen 110 at a time interval of 0.5 seconds are also displayed. The control disappears once every 0.5 seconds, and after 2 seconds, the user is notified exactly when the song starts and when the song starts.

In addition, when the reserved bit of the picture coding bit is read as '110', the microcomputer 50 recognizes that the data is the song stop data, and the video signal processor 90 may store pre-stored data and control signals for displaying the data. Occurs.

Accordingly, the video signal processor 90 processes the data provided from the microcomputer 50 on-screen display (OSD) and outputs the data to the screen 110 to be displayed on the screen, which is a timing in a predetermined area of the screen 110. In the form of a timing bar, for example, as shown in FIG. 4, four timing bars appearing in the upper right corner of the screen 110 at a time interval of 0.5 seconds are also displayed. The control will be extinguished once every 0.5 seconds, and after 2 seconds the user will be informed exactly when the song stops and when the song stops.

That is, according to the present invention, the microcomputer 50 reads the data recorded in the reserved bits of the picture coding bits, and performs the video signal processing unit 90 and the screen 110 for preliminary processing for the point where the song starts and the point where the song stops. The position and time interval of the above-described timing bar for ego of song start and song stop can be adjusted as needed.

3 is a flowchart of a song accompaniment method of a video compact disc player according to a preferred embodiment of the present invention.

In step S10, when playback is performed in the song accompaniment mode for the disc for the song accompaniment function, in step S20, the reserved bits of the picture coding bits are read to determine whether the song start bit is detected. That is, it is determined whether the reserved bit read out is the song start bit. In step S20, if a song start bit, for example, 3 bits of '111' is detected, the process proceeds to step S30, otherwise, the process proceeds to step S40.

When the process proceeds from step S20 to step S30, in step S30, a predetermined number of times, for example, four timing bars are displayed in a predetermined area of the screen 110, for example, the upper left ear, and then the timing bars are displayed for a predetermined time. For example, by performing a song start preliminary processing indicating that the song starts after 2 seconds by erasing one every 0.5 seconds.

On the other hand, when the process proceeds from step S20 to step S40, in step S40, it is determined whether the song stop bit, for example, data of '001' is detected from the reserved bit. If detected, the flow advances to step S50, otherwise, the flow returns to step S20 to repeat the flow.

When the data of '001' is detected in step S40 and the process proceeds to step S50, in step S50, a predetermined number, for example, four timing bars are displayed on the upper right ear of the screen 110, and then the timing bars are predetermined. The song pause preliminary processing is performed to signal that the song stops after 2 seconds by erasing one time every 0.5 seconds.

Thereafter, in step S60, it is determined whether the song in which the song accompaniment mode is executed is finished. If the song is finished in step S60, the flow ends, otherwise, the flow returns to step S20 to step S20 to step S60. Repeat step S50 until the song ends.

As described above, the present invention has an advantage of allowing the user to recognize when the song starts and when the song stops when the song accompaniment function is executed.

Claims (2)

In the song accompaniment method of the video compact disc player to display the start and stop portions of the song to the user when the song accompaniment function is executed in the video compact disc player, Song start and song stop data are pre-recorded in spare bits of picture coding bits constituting each video coding information byte of a predetermined disc to be reproduced to execute the song accompaniment function, (A) reading a preliminary bit of a picture coding bit recorded on the disc and determining whether the preliminary bit is a song start bit when reproduction is performed in a song accompaniment mode; (B) if the preliminary bit read in step (a) is a song start bit, performing a song start notification process; (C) determining whether the reserved bit read out in step (a) is a song stop bit if it is not a song start bit; (D) executing a song stop notification process if the reserved bit is a song stop bit in the step (c); (E) repeating steps (a) to (d) until the song for performing the song accompaniment ends; The method of claim 1, wherein the song start notification process of step (b) and the song stop notification process of step (d) include a predetermined number of timing bars that are erased at predetermined time intervals. A song accompaniment method of a video compact disc player, characterized in that executed by displaying on.