KR970011835B1 - Apparatus for breaking power in a complex system of a ldp and television - Google Patents

Abstract

A power supply cut off apparatus for integrated product of an optical disk player is provided that maintains a power supply of the optical disk player while cutting off the power supply to the TV, when only sound signal is recorded to the compact. The apparatus having a signal reading unit(10) for reading data recorded on a recording medium such as a compact disk (CD) where a sound information is recorded, or a video compact disk (VCD) where a sound information or motion picture information are recorded, a signal processor(14) for amplifying a recorded data read and transmitted from the signal reading unit and signal-processing it to a serial data stream; a CD-ROM decoder(15) for decoding the data from the signal process unit and extracting an MPEG data, and an MPEG decoder(16) for decoding the MPEG data from the CD-ROM decoder fitting to a reference clock (90kHz) according to a system clock reference data and a control data including a decoding time stamp (DTS) and a display time stamp (PTS) and outputting it, and a TV having a tuner(20) for selecting a channel according to a channel data transmitted from a micro computer(40), a middle frequency amplifier(21) for amplifying the channel selected by the tuner and outputting a composite image signal, an image processor(23) for processing the composite image signal to output R, G and B signals, and a CRT(24), includes a power supply cut off unit(41) for cutting off a power supply from a power supply unit(43) to a high pressure generator(42) of the TV circuit or the CRT, and a micro computer for discriminating kinds of the disks in a video compact disk mode, applying a predetermined control signal to the power supply cut off unit in case of the compact disk where the sound signal is recorded to thereby maintain the power supply of the optical disk player while cutting off the power supply to the TV.

Description

Power cut-off device in optical disc player and television composite product

1 is a block diagram showing the configuration of an optical disc player and a television composite product according to the present invention;

FIG. 2 is a diagram showing a detailed circuit of the power cutoff unit shown in FIG.

3 is a flowchart for explaining the operation of the present invention.

* Explanation of symbols for main parts of the drawings

10: recording medium 11: optical pickup

12: spindle motor 13: RF amplifier

14: signal processor 15: CD-ROM decoder

16: MPEG decoder 20: antenna

21: tuner 22: intermediate frequency amplifier

23: image processing unit 24: CRT unit

30: switching unit 40: microcomputer

41: power cut off part 42: high pressure generating part

43: power supply unit 50: servo drive unit

60: key input unit

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power cut-off device in an optical disc player and a television composite product. In particular, when the recording medium placed on the disc tray of the optical disc player contains only an audio signal, the optical disc player is supplied to the audio signal processing system. The present invention relates to an optical disc player and a power cut-off device for a television composite product, which can reduce the power consumption for driving the composite product by cutting off the power supplied to the television while maintaining the power supply. will be.

Currently, a compact disc (CD) is widely used as an information recording medium in the form of an optical disc in which a large amount of audio information is recorded. This is theoretically always possible regardless of the number of times the disc is reproduced because optical data is detected and reproduced. It has the advantage of having uniform hi-fi regeneration characteristics.

The data recorded on the compact disc (CD) as described above has a synchronization signal, and the block from this synchronization signal to the next synchronization signal is called a frame. Each frame has a sub code containing control information and various service information starting from a synchronization signal (frame synchronization signal) indicating the head of the frame, and also an audio signal and an error correction signal. There are eight channels from P to W in the above subcodes. Currently, compact disc digital audio (CDDA) generally uses only P and Q channels, and the song number, index number, playback time of the song, and running time from the beginning of the program. And presence / absence of an audio signal.

In addition, a compact disc graphic (CDG) using a compact disc digital audio (CDDA) format as described above and recording still picture data (graphic data) using R-W channels of a subcode is developed. A compact disc graphics player has been developed for playing disc graphics (CDG), providing excellent high fidelity audio such as compact disc digital audio (CDDA), as well as graphic backgrounds and images on display devices such as television screens and monitors. Caption screen can be displayed to meet the consumer's demand for combining audio and visual, and compact disc (VCD) containing moving picture information not provided in the compact disc (CD) or compact disc graphic (CDG). ) Is emerging as an audio / video information recording medium for next generation multimedia. This is based on the standard for moving picture processing proposed by the Motion Picture Experts Group (MPEG), which compresses video and audio information and records a large amount of information on a compact disc (VCD).

Therefore, a compact disc disc player for playing a video compact disc (VCD), such as a compact disc (CD) containing sound information, a compact disc graphic (CDG) including graphic information, and a video compact disc (VCD) including moving pictures It is configured to enable compatible playback of compact discs, and has a decoding function of MPEG standard for restoring compressed video information and audio information from the video compact disc (VCD).

In addition, in recent years, as TVs and video compact disc players are widely used, compact systems are developed that combine these systems, and these complex products have not only a television broadcasting function but also a compact disc (CD) or compact. The operation of reproducing disc graphics (CDG), video compact disc (VCD), and recording of video and audio signals reproduced from the above-described recording media can be suggested by a single control input. Video that does not have recorded data of video among discs played on a compact disc player Compact disc digital audio that does not have recorded data about video on a disc played on a compact disc player When playing a recording medium such as digital audio, only a disc player function is required. No function required And there is a problem that the reduced life of cathode-ray tube, with no avail soon as the power consumed by displaying the background screen consisting of single color on the TV screen.

The present invention has been made in view of the above circumstances, and in the case where only the audio signal is recorded in the recording medium placed on the disc tray of the optical disc player, the power supplied to the optical disc player is cut off while maintaining the power supplied to the optical disc player. It is an object of the present invention to provide an optical disc player and a power cut-off device for a television composite product, which can reduce power consumption for driving a composite product and also prolong the life of the CRT.

According to the power interruption device in the optical disc player and the television composite product of the present invention for achieving the above object, a compact disc (CD) on which audio information is recorded or a video compact disc (VCD) on which audio information and moving image information are recorded. Signal reading means for reading recorded data recorded on a recording medium such as a), and signal processing means for amplifying the recorded data read out and sent by the signal reading means and processing the signal into a serial data stream; CD-ROM decoding means for decoding data from the signal processing means to extract MPEG data, CD-ROM decoding means for extracting MPEG data from this CD-ROM decoding means, MPEG data from this CD-ROM decoding means According to control data including system clock reference data (SCR), decoding time (DTS), and display time stamp (PTS). It gave optical clock with MPEG decoding means for decoding outputs according to (90㎑) player; A tuner that tunes a channel according to channel data transmitted from the control means, an intermediate frequency amplification means for amplifying a channel tuned by the tuner and outputting a composite video signal, and a composite video signal to process an R, G, B signal. In a composite product of an optical disc player and a television composed of an image processing means for output and a television with a CRT, a power cut-off means for cutting off power applied from a power supply to a high voltage generating means of a television circuit or a CRT, and a video compact disc mode. In the case of a compact disc in which only the audio signal is recorded by determining the type of the disc, the control means for controlling the power of the television to be cut off while maintaining the power of the optical disc flare by applying a predetermined control signal to the power cut-off means. It is provided.

Here, the power cut-off means is a transistor that performs a switching function by receiving a control signal from the control means as its base terminal, one side of the coil is connected to the collector terminal of the transistor and the other side is supplied with battery power. The switch is short-circuited / opened in accordance with the on / off state of the transistor to apply / block power from the power supply.

Therefore, according to the present invention configured as described above, in the composite product of the optical disc player and the television, when the disc mounted and reproduced in the disc tray of the optical disc player in the video compact disc mode is a compact disc in which only an audio signal is recorded, If the control means searches the Q channel of the sub code among the recording data of the compact disc and indicates that the value is a compact disc without any additional manipulation by the control means, the control means sends a predetermined control signal to the power cutoff means to supply power to the optical disc player. It is possible to cut off the power to the high-pressure generating means for driving the driving circuit or the water pipe of the television while maintaining the.

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

FIG. 1 is a block diagram schematically showing the configuration of an optical disc player and a television composite product according to the present invention, wherein the optical disc player portion of the composite product shown in the figure records a compact disc (CD) in which audio information is recorded or audio information and moving picture information. Amplifying the signal reading means 10 for reading the recorded data recorded on the recording medium 10 such as a video compact disc (VCD), and the recorded data read out and sent out by the signal reading means 11 A signal processor 14 which performs a signal processing such as a serial data stream, a CD-ROM decoder 15 which decodes data from the signal processor 14 to extract MPEG data, and a CD-ROM decoder ( 15. The MPEG data from 15) is decoded according to the reference clock (90 ms) according to the control data including the system clock reference data (SCR), the decoding time stamp (DTS) and the display time stamp (PTS). It consists of the MPEG decoder 16 which codes and outputs.

In the composite product of FIG. 1, the television unit amplifies a tuner 21 for tuning a channel according to channel data transmitted from the microcomputer 40, and outputs a composite video signal by amplifying the channel tuned by the tuner 21. The intermediate frequency amplifier section 22, a video processing section 23 for processing a composite video signal, etc., and outputting an R, G, B signal, and a television equipped with a CRT section 24 are provided.

In addition, the composite product includes a power cut-off unit 41 for cutting off power applied from the power supply unit 43 to the high voltage generating means 42 of the television circuit or the CRT 24, and the type of disc in the video compact disc mode. In the case of a compact disc in which only an audio signal is recorded, a predetermined control signal is applied to the power cut-off unit 41 to further control the microcomputer 40 to control the power of the television while maintaining the power of the optical disc player. In the disc discrimination method of the microcomputer 40, when a user selects a video compact disc (VCD) mode after supplying power to the composite product first, lead-in of the disk on which the microcomputer 40 is mounted. The recording medium 10 does not contain the image data when the Q channel data of the P to W channels in the subcode recorded in the station is read and "PSEC = 00" where "POINT = A0". In addition, the R-W channel is searched among the P-W channels in the sub-code in the lead-in area to search for a recording signal, ie, whether there is any code, and if there is code data, data for a still picture is recorded. If it is determined that it is, the CDG is recognized.

In addition, when the switching unit 30 shown in FIG. 1 is first supplied with power to the composite product of the present invention and is in a television mode according to a user's selection, the contact point is controlled by the microcomputer 40. (b1-c1) is switched to transfer the audio signal from the intermediate frequency amplifier section 22 of the television section to the audio processing section 31. In the optical disc player mode, the contact point is controlled by the microcomputer 40 in the optical disc player mode. Switched to the terminals a1-c1, the audio signal from the signal processor 14 is transferred to the audio processor 31 in the case of a compact disc (CD), and a predetermined signal in the case of a video compact disc (VCD). The audio signal from the processed MPEG decoder 16 is transferred to the voice processor 31.

In this case, the MPEG decoder 16 collectively shows the MPEG video decoder and the MPEG audio decoder for convenience of operation, but the device configuration is actually separated.

In addition, the power cut-off unit 41 is a transistor (Q) for performing a switching function by receiving a control signal from the microcomputer 40 as its base terminal, and one of the coils to the collector terminal of the transistor (Q) The other side is supplied with the battery power source B ⁺ , and the switch is short-circuit / opened in accordance with the on / off state of the transistor Q to apply / block power from the power supply unit 43.

Next, the operation of the present invention configured as described above will be described in more detail.

That is, when the user first selects the video compact disc mode by pressing a mode selection button (not shown) of the key input unit 60 after supplying power to the optical disc player and the television composite product used in the present invention, the microcomputer 40 Recognizing this, the contact point of the switching unit 30 is switched to the terminals a1-c1. Then, when the user presses the eject button of the optical disk player of the composite product to "open" the disk tray, and mounts a compact disk (CD) containing only voice information on the disk tray, and then presses the play button, The microcomputer 40 is read by the optical pickup 11, amplified by a predetermined value through the RF amplifier 13, and then read-out of the recording medium 10 among the data processed by the signal processor 14. When the Q channel data of the P to W channels in the sub-code in the in-area is detected and " PSEC = 00 " where " POINT = A0 ", it is judged that only the audio signal is recorded without the video data.

Then, to satisfy the above condition, it is detected whether there is a recording signal in the P to W channels, and if any recording signal is detected at this time, it is determined that not only an audio signal but also data for a still picture are recorded.

Here, in the case of a compact disc, the principle of disc type to be loaded on the disc tray is to use the P, Q channels of the eight P-W channels in the sub-code. The playback time, the cumulative time from the beginning of the program, the presence / absence of the audio signal, etc. are displayed, and in the case of the compact disc graphic (CDG), the same format of the compact disc digital audio (CDDA) as described above is used as is and the subcode R Since the ~ W channel is used, the type of the recording medium can be known by detecting the area.

Accordingly, when the microcomputer 40 determines that the disk mounted on the disk tray is a compact disk (CD) in which only audio signals are recorded, the base terminal of the transistor (Q) of the power cut-off unit 41 is determined. The control signal of the relay T is turned off and the transistor Q is turned off. Accordingly, the coil of the relay T which is connected to the collector terminal thereof, is supplied with the battery power supply B ⁺ , and the switching contact of the relay switch is in a short circuit state. When the current flowing in the circuit is cut off, the switch of the relay T is opened, and the power supplied from the power supply unit 43 to the high voltage generator 42 or other television circuits is switched off via the switch of the relay T. By doing so, the operation of the television is stopped.

Subsequently, when the reproducing operation of the compact disc is performed and the reproducing operation is terminated by a key input signal by the user, the transmission of the control signal applied from the microcomputer 40 to the power cut-off unit 41 is stopped. Since the transistor Q of the power cut-off portion 41 is "on" again and current flows again in the coil of the relay T, the switch is excited and short-circuited, so that the power from the power supply 43 is disconnected from the relay ( It is applied to the high voltage generating section 42 or other television circuits via the switch of T), thereby bringing the television to the "on" state again.

On the other hand, when the microcomputer 40 determines that the disc mounted on the disc tray is a compact disc graphic (CDG) in which not only an audio signal but also information on a still image is recorded, a predetermined stop is made on the screen of the television CRT 24. Since the image should be displayed, the control signal to the power cutoff unit 41 is not applied.

In addition, even when the video compact disc (VCD) is mounted on the disk tray (not shown), the power cut operation by the control signal of the microcomputer 40 is not performed.

In addition, the circuit of the power cut-off unit 41 has been described as an example of the present invention simply configured to facilitate the operation description as shown in FIG. 2, but various forms without departing from the gist of the present invention. It can be easily carried out by deforming to.

In other words, the above example has been described in which the power source to the television is cut off in the case of a CD disc, but the signal processing system (for example, the CD-ROM decoder in FIG. 15) and the power applied to the MPEG decoder 16 may be cut off.

Therefore, as can be seen from the above description of the operation, according to the present invention, in a composite product of an optical disc player and a television, a disc mounted and reproduced in a disc tray of the optical disc player in a video compact disc mode is used only for an audio signal. In the case of the recorded compact disc, the control means searches for the Q channel of the sub code among the recording data of the compact disc without a separate operation by the user. It is possible to cut off the power of the high voltage generating part for driving the driving circuit of the television or the water pipe while sending out a signal to maintain the power of the optical disc player, thereby reducing the power consumption of the composite product. In addition, the life of the CRT can be extended. Will be.

Claims (2)

Signal reading means (10) for reading recorded data recorded on a recording medium (10) such as a compact disc (CD) on which audio information is recorded or a video compact disc (VCD) on which audio information and moving image information are recorded; And a signal processor 14 which amplifies the recorded data read out by the signal reading means 11 and outputs the signal into a serial data stream, and decodes the data from the signal processor 14 to MPEG. CD-ROM decoder 15 for extracting data, and MPEG data from the CD-ROM decoder 15 including system clock reference data (SCR), decoding time stamp (DTS), and display time stamp (PTS). An optical disc player having an MPEG decoder 16 for decoding and outputting in accordance with a reference clock (90 ms) according to control data; A tuner 21 for tuning channels according to the channel data transmitted from the microcomputer 40, an intermediate frequency amplifier 22 for amplifying the channels tuned by the tuner 21 and outputting a composite video signal, and a composite video. In a composite product of an optical disc player and a television composed of an image processing unit 23 that processes a signal lamp and outputs an R, G, and B signal, and a television having a CRT unit 24, the power supply unit 43 provides a television circuit or a CRT ( The power cut-off unit 41 for cutting off the power applied to the high-voltage generating means 42 of the step 24, and in the case of a compact disc in which only a voice signal is recorded by discriminating the type of disc in the video compact disc mode. The optical disc player further comprises a microcomputer 40 for controlling a power supply to the television while maintaining the power of the optical disc player by applying a predetermined control signal to the blocking unit 41. And power interrupters in television composites. The transistor (Q) of claim 1, wherein the power cut-off unit (41) performs a switching function by receiving a control signal from the control means (40) as its base terminal, and one of the coils (Q). ) of the collector receives access to the terminals and the other is supplied to the battery power source (B ⁺⁾ that the switch is in short-circuit / open state according to the on / off state of the transistor (Q) supply power from the power source 43 / A power cut-off device in an optical disc player and a television composite product, characterized by being cut off.