KR0164188B1 - Video compact disc player for double televiewer - Google Patents

Abstract

The present invention relates to a video compact disc player for a redundancy viewer, the configuration comprising: switching means (28) for selectively switching the output path of an MPEG audio / video data signal output from the CD-ROM decoder (22); First and second memory means (30a, 30b) for storing the MPEG audio / video data routed and output through the switching means; MPEG decoders 32a and 32b and respective D / s which decode the MPEG audio / video data signals output from the first and second memory means 30a and 30b according to audio and video synchronization clocks and convert them into analog signals. A conversion means 34a and 34b; Key input means 26 including a first playback key 26b and a second playback 26c key for selecting playback output of each television 40a, 40b and a redundant playback key 26d for redundant playback. And; The switching path of the switching means 28 is controlled according to a user's key input through the key input means 26, and the first memory 30a and the second memory are set when the redundant reproduction key 26d is set. A read / write signal is applied to the means 30b to control the transfer of the MPEG audio / video stored in the first memory 30a or the second memory means 30b. It comprises a control means 24, using the same video compact disc player and the video compact disc, the total amount from the beginning to the end of the playback of the video compact disc player to the overlapping viewer having a slight difference in the playback time It has the effect of making everyone viewable.

Description

Video Compact Disc Player for Redundant Viewers

1 is a block diagram of a general video compact disc player.

2 is a block diagram of a video compact disc player block for a redundant viewer according to the present invention.

3 is a diagram illustrating an example of the key input unit illustrated in FIG. 2.

* Explanation of symbols for main parts of the drawings

12: spindle motor 14: optical pickup

16: Servo circuit section 18: Preamplification section

20: digital signal processor 22: CD-ROM decoder

24: microcomputer 26: key input unit

28: stitching unit 30a, 30b: memory

32a, 32b: MPEG decoder 34a, 34b: D / A converter

36a, 36b: Audio / Video Terminal

The present invention relates to a video compact disc player for redundant viewers, and more particularly, to a duplicate viewer having a slight difference in playback time using the same video compact disc player and a video compact disc. The present invention relates to a video compact disc player for redundant viewers that can watch all of the total.

Currently, an information recording medium for recording audio / video data using MPEG (Movubg Picture Expert Group) method such as video compact disc (VCD) is attracting attention as a next generation audio / video information recording medium. An international standard drafted by experts from ISO / IEC and Joint Technical Committee (JTC), the international standardization bodies ISO and IEC were formed to compress and encode digital video, the most important technique in the environment. You can watch about 74 minutes of video on a disc. In addition, although the MPEG itself refers only to moving pictures, it also defines a standard for digital voice compression and a standard for a system having a packetized structure of audio / video.

A general video compact disc player (hereinafter referred to as VCDP) for reproducing a video compact disc on which audio / video data is recorded by the MPEG method as described above is as shown in FIG. 1, and in FIG. Denotes an optical disc on which predetermined audio / video information is recorded based on MPEG algorithm, such as a video compact disc (hereinafter referred to as VCD), and 52 denotes a spindle motor for rotating the optical disc 50 at constant speed. Denotes an optical pickup for reading data recorded on the optical disc 50. FIG.

Reference numeral 56 denotes a servo for controlling the drive of the spindle motor 52 and controlling the output of the laser pickup (not shown) and the transfer of the optical pickup 54 and the optical pickup 54. 58 denotes a preamplifier for amplifying the data read by the optical pickup 54 by a predetermined value, and 60 denotes a digital signal which processes the data amplified by the preamplifier 58 into a serial data stream. 62 denotes a processing unit, and 62 denotes the overall operation of the apparatus in accordance with an operation command signal from the key input unit 64 having a plurality of operation command keys (e.g., function keys for setting of playback, standing, recording, double speed mode, etc.) Indicates the microcomputer to control.

Reference numeral 66 denotes a CD-ROM decoder which decodes the data output from the digital signal processor 60, extracts the sector unit code, and separates and outputs the MPEG data and the control data, and 68 denotes the CD-ROM decoder ( 26 indicates an MPEG decoder which decodes the MPEG data output from the MPEG decoder according to audio and video synchronization clocks (approximately 90 Hz), and reference numeral 70 denotes the decoded digital audio / video data output from the MPEG decoder 68. A digital-to-analog converter which converts an analog signal and then provides it to a television receiver.

However, in the case of playing a VCD using a conventional general video compact disc configured as shown in FIG. 1, if another person wants to watch the contents of the VCD being started again from the beginning, the user stops and then stops the optical pickup. Since the position must be replayed as the initial position of playback, the viewer who is viewing first has to watch the portion that has been watched in the past, or the viewer must watch from the current playback position while ignoring the contents already played.

In other words, in order to watch the contents of the VCD being played from the beginning, other viewers can play it again after completing the pre-playing, or stop the pre-playing and then rewind (REW) to play it again from the beginning. Or, the hassle of having to watch from the current playback position while ignoring the pre-played contents has occurred.

SUMMARY OF THE INVENTION The present invention has been made in view of the above, and an object thereof is to provide a duplicate viewer with a slight difference in playback time from the beginning to the end of video compact disc playback using the same video compact disc player and video compact disc player. It aims to provide a video compact disc player for redundant viewers that allows them to watch all of the total volume.

According to a preferred embodiment of the present invention to achieve the above object, the signal reading means for reading the audio / video signal recorded on the optical disk consisting of optical pickup, spindle motor, servo circuit; Amplification and digital signal processing means for amplifying the read signal and processing the digital signal; A video compact disc player comprising a data processing means consisting of a CD-ROM decoder, an MPEG decoder, and a digital / analog converter to decode, analog-convert, and provide an audio / video signal of a digitally processed disc to a television receiver. A switching means for selectively switching the output path of the MPEG audio / video signal output from the CD-ROM 22; First and second memory means for storing the MPEG audio / video data routed and output through the switching means; Respective MPEG decoders and D / A converting means for decoding the MPEG audio / video data signals outputted from the first and second memory means in accordance with audio and video synchronization clocks and converting them into analog signals; Key input means including a first playback key and a second playback key for selecting the playback output of each television and a redundant playback key for redundant playback; The switching path of the switching means is controlled according to a user's key input through the key input means, and when a redundant reproduction key is set, a read / write signal is applied to the first memory and the second memory means. And control means for controlling each other to transfer and transfer MPEG audio / video data stored in the first memory or the second memory means.

Hereinafter, a video compact disc player for a redundant viewer according to the present invention will be described in detail with reference to the accompanying drawings.

2 is a block diagram of a video compact disc player for a redundant viewer according to the present invention, in which reference numeral 10 denotes a predetermined audio / video information recorded on the basis of an MPEG algorithm such as a video compact disc (VCD). An optical disc is shown, 12 denotes a spindle motor for rotating the optical disc 10 at constant speed, and 14 denotes an optical pickup for reading data recorded on the optical disc 10. FIG.

Reference numeral 16 denotes a servo which controls the drive of the spindle motor 12 and controls the output level of the transfer of the optical pickup 14 and the laser diode (not shown) installed in the optical pickup 14. 18 represents a preamplifier for amplifying the data read by the optical pickup 14 by a predetermined value, and 20 represents a digital signal for processing the amplified data in the preamplifier 18 into a serial data stream. This shows a processing unit DSP.

Reference numeral 22 denotes a CD-ROM decoder which decodes the data output from the digital signal processor 20, extracts the data in sectors, and outputs the MPEG data and the control data separately. Reference numeral 24 is shown in FIG. As shown in the drawing, a microcomputer that controls the operation of the entire apparatus in accordance with an operation command signal from a key input unit 24 having a plurality of operation command keys is shown. The microcomputer 24 as the control means controls the key input unit 26. By controlling the switching path of the switching unit 28 to be described later in accordance with the user's key input through the read and write to the first memory 30a and the second memory 30b, which will be described later, when the redundant playback key 26D is set. A READ / WRITE) signal is applied to perform control so that the MPEG audio / video data stored in the first memory 30a or the second memory 30b can be transferred to each other for memory.

In addition, reference numeral 26 denotes a power key 24a, a first playback key 24b, a second playback key 24c, a double (redundant) playback key 24d, and a stop key 24e, as shown in FIG. ), And a key input section provided with a plurality of operation command keys, such as a 10-key 26f, and the key input section 24 on the front control panel of each television for screen and audio reproduction of the disk 10. It can be installed or configured as a remote control as a remote control.

In the figure, reference numeral 28 denotes a switching unit for selectively switching the output path of the MPEG audio / video data signal output from the CD-ROM decoder 22, the switching unit 28 according to a user's key input. The switching operation is switched according to the control signal of the microcomputer 24. For example, when the first regeneration key 26d of the key input unit 26 is pressed, the output path is set to the first memory 30a. When the second reproducing key 26c is pressed, the output path is set to the second memory 30b.

Reference numerals 30a and 30b denote first memory 30a and second memory 30b for storing the MPEG audio / video data routed and output through the switching unit 28. The high capacity memory And read / record MPEG audio / video data stored in the memories 30a and 30b according to the read / write signal of the microcomputer 24, and refer to 32a and 32b represents an MPEG decoder which decodes and outputs MPEG audio / video data output from the first and second memories 30a and 30b in accordance with audio and video synchronization clocks (approximately 90 Hz), and 34a and 34b represent the MPEG decoder. Decoded digital audio / video data output from the MPEG decoders 32a and 32b is analog-converted and the audio / video (Aout1 / Vout1.Aout2 / Vout2 Digital / analog converter for

Hereinafter, an operation of a video compact disc player for a redundant viewer according to the present invention configured as described above will be described.

First, when the user sets the first playback key 26b provided in the remote controller 26 as the key input unit shown in FIG. 3, the user reads the audio / video information normally recorded on the VCD, and at this time, the microcomputer 24 ) Controls the switching path to apply the control signal to the switching unit 28 to provide the audio / video signal output from the CD-ROM decoder 22 to the first memory 30a, and the first memory 30a. ) Is supplied with a read signal to provide the MPEG memory side 32a with a signal stored in the first memory 30a. Subsequently, the audio / video signal provided to the MPEG decoder 32a is decoded and converted into an analog signal by the D / A converter 34a, and then the video / audio is reproduced through the CRT and the speaker of the first television 40a. .

On the other hand, if the user sets the second playback key 26c provided in the remote controller 26 by selection, the audio / video information recorded in the VCD 10 is normally read, and the microcomputer 24 switches. A control signal is applied to the unit 28 to control the switching path to provide an audio / video signal output from the CD-ROM decoder 22 to the second memory 30b, and to read the second memory 30b. The READ signal is applied so that the signal stored in the second memory 30b is provided to the MPEG decoder side 32b. Subsequently, the audio / video signal provided to the MPEG decoder 32b is decoded and converted into an analog signal by the D / A converter 34b. Then, the video / audio is reproduced through the CRT and the spur of the second television 40b. do.

In addition, the remote controller serving as the key input unit 26 is provided in the state of performing the above reproducing operation (e.g., setting the first reproducing key 26b to allow video / audio reproducing to the first television 40a side). When the double play key 26d is set, the microcomputer 24 applies a read signal to the first memory 30a, and the MPEG demodulator 32a and the D / A converting unit ( At 34a), the audio / video signal stored in the first memory 30a is processed to reproduce and output the video / audio signal to the first television 40a, and at the same time, the second memory 30b is written to RIGHT. The signal is applied to store the audio / video signal stored in the first memory 30a in the second memory 30b. As such, when the audio / video signal is stored in the second memory 30b by the control, the microcomputer 24 applies the read signal to the second memory 30b to store the memory in the second memory 30b. When the audio / video signal is provided to the MPEG decoder 32b side, the MPEG decoder 32a and the D / A converter 34a process the audio / video signal stored in the second memory 30b to perform a second operation. The video / audio signal is reproduced and output to the television 40b side.

As described above, according to the video compact disc player for the redundant viewer according to the present invention, in the case of a general VCD, the MPEG signal is decoded in the VCDP, digital / analog converted, and then the audio / video signal is reproduced and viewed on a general television. Since the CD-ROM drivers of 2x, 4x and 6x are generalized and the memory capacity is also developed as a very large memory due to the development of semiconductor technology, the present invention uses the same VCD of a single VCDP by using a high capacity memory. Audio / video information recorded on the video recorder can be watched on each monitor to duplicate viewers with different playback start times, so that duplicate viewers with slight differences in playback time can be made using the same video compact disc player and video compact disc. From start to end of playback of video compact discs There is an effect that can ever watched both the total amount.

Claims (1)

A signal reading means composed of an optical pickup 14, a spindle motor 12, and a servo circuit 16 for reading audio / video signals recorded on an optical disc; Amplification and digital signal capture means (18, 20) for amplifying the read signal and processing the digital signal; Data processing comprising a CD-ROM decoder 26, an MPEG decoder 28, and a digital / analog converter 30 to decode, analog-convert, and provide an audio / video signal of a digitally processed disc to a television receiver. A video compact disc player comprising means, comprising: switching means (28) for selectively switching an output path of an MPEG audio / video signal output from the CD-ROM decoder (22); First and second memory means (30a, 30b) for storing the MPEG audio / video data routed and output through the switching means; MPEG decoders 32a and 32b and respective D / As which decode the MPEG audio / video data signals outputted from the first and second memory means 30a and 30b in accordance with audio and synchronous clocks and convert them into analog signals. Converters 34a and 34b; A key input means 20 provided with a first playback key 26b and a second playback 26c key for selecting the playback output of each of the televisions 40a and 40b and a redundant playback key 26d for redundant playback. And; The switching path of the switching means 28 is controlled according to a user's key input through the key input means 26, and the first memory 30a and the second memory are set when the redundant reproduction key 26d is set. A read / write signal is applied to the means 30b so that the MPEG audio / video data stored in the first memory 30a or the second memory means 30b can be transferred to each other for memory. And a control means (24) for the video compact disc player.