JPH08307783A - Television device with built-in cd reproducing device - Google Patents

Abstract

PURPOSE: To reduce interferance radiation to a TV tuner by detecting the kind of a CD and operating clock circuit of an irreducible minimum for operating the CD when video recording is performed in an external VTR by operating a CD reproducing device, receiving a TV signal, in the television device with built-in CD reproducing device. CONSTITUTION: This device is provided with a controller 13 performing a control so as to perform video recording for the output from a CD reproducing device in an external VTR by operating this CD reproducing device which is possible to play plural kinds of disks even when an input switch circuit 17 selects a TV signal and performs a video display. By making the CD reproducing device inoperative by detecting that a disk is not loaded by a CD presence/absence/kind detection means and operating only a voice system clock generation part or a video system clock generation part which is necessary to the performance of the disk by detecting the kind of the disk, interference radiation is reduced and power saving is performed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a video CD, a photo C.
The present invention relates to a television device with a built-in CD reproducing device for reproducing a plurality of types of discs such as D, CD graphics, and CD digital audio.

[0002]

2. Description of the Related Art As a method of using the television device, one of a TV broadcast program, an external input and an output signal of a CD reproducing device is selected and displayed by a cathode ray tube and a speaker of the television device. Besides, when receiving a television signal and watching a TV broadcast program, operating the CD reproducing device to watch or listen to video or audio on another receiver, or operating the CD reproducing device. VT
There is a case to record with R. At that time, as a measure against the interference radiation to the received image portion of the tuner or the like of the television apparatus during the reproduction of the CD, the television signal receiving portion of the tuner or the like and the digital processing portion of the CD reproducing apparatus are separated. Maybe
We have tried to reduce the interference radiation by taking measures such as surrounding the source with a shield case and mounting noise countermeasure parts such as a ferrite bead core and a noise filter.

[0003]

[Problems to be Solved by the Invention] Video CD, Photo C
Some discs such as D, CD graphics, and CD digital audio have video data and audio data recorded, some have only video data recorded, and some have only audio data recorded. Since video data have different standards, a clock signal determined for each video data is required. Then, when the CD reproducing device is built in the television device, the CD reproducing device having several kinds of clock signals approaches the TV tuner in the television device. Therefore, while watching a TV broadcast program, which is frequently used as a function of a television device, the CD reproducing device is operated to record on an external VTR or another TV device.
In the case of displaying by the device, a means for reducing the interference radiation accompanying the operation of the CD reproducing device is required.

An object of the present invention is to mount the CD reproducing device in the T
The TV when using the video and audio display of V device
In conjunction with the input switching operation to the device, C
The D player is not operated, and the CD player is operated while receiving the TV signal to operate the external VTR.
In the case of recording or displaying with a TV device or other TV device, the CD reproducing device detects the type of the CD and operates the minimum necessary circuit to try to reduce the interference radiation to the TV tuner. Especially.

Another object is to eliminate unnecessary power consumption by stopping unnecessary clock generators or their circuit blocks.

[0006]

In order to achieve the above object, a control terminal is provided in a clock generating section such as a crystal oscillator or a circuit block such as a PLL in the CD reproducing apparatus to discriminate presence / absence and type of a disc. Means are provided for controlling the clock generator or its circuit block depending on the result or the state of input selection of the television receiver.

Further, in order to achieve the above object, the C
A terminal for controlling the power supply circuit is provided in the D playback device, and means for controlling the power supply circuit is provided according to the input selection state of the television receiver.

[0008]

Some discs have video data and audio data recorded, some have only video data recorded, and some have only audio data recorded. The circuits of the CD reproducing device that can reproduce all of these discs do not need to operate all the circuits for the disc being played. Therefore, a control terminal is provided in the clock generation section or its circuit block which does not need to operate, and the stop of the operation is controlled by the microcomputer or the like in the CD reproducing device.

When the input selection state of the television device with the built-in CD reproducing device is TV broadcast program or external input, the operation of the source of the disturbing radiation of the CD reproducing device is basically stopped.

Next, when the input selection state of the television device with a built-in CD reproducing device is a TV broadcast program or external input, the CD reproducing device is operated to record on an external VTR or another TV device. When displaying or displaying, first detect whether a disc is inserted or not.If it is not inserted, the source of the interference radiation is set to inoperative. If it is inserted, the type of CD is detected. Stop unnecessary clock generators.

[0011]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of a CD reproducing apparatus according to the present invention, in which 1 is a microcomputer, 2 is a CD drive, 3 is a video system circuit, 4 is a video system clock, and 5 is a video system. Control OFF terminal, 6 is an audio system circuit, 7 is an audio system clock, 8 is an audio system control OFF terminal,
Reference numeral 9 is a video output terminal and 10 is an audio output terminal.

FIG. 2 is a block diagram showing an embodiment of a television device with a built-in CD reproducing device according to the present invention.
1 is a remote controller (hereinafter referred to as a remote controller), 1
2 is a remote control light receiving circuit, 13 is a control device, 14 is a CD reproducing device with a microcomputer, 15 is a tuner, 16 is an external input terminal, 17 is an input switching circuit, 18 is a signal processing circuit, 19 is a cathode ray tube, 20 is a speaker, 21 Is a signal switching circuit, 22 is an external output terminal, and 23 is a VTR or other TV device connected to the external output terminal 22.

In FIG. 1, the microcomputer in the CD device has a function of detecting the presence or absence of a disc and the type of the disc. When the disc is inserted into the CD drive 2, the microcomputer discriminates the presence or absence of the disc and the type of the disc. Then, the digital data will be read. The read digital data is subjected to digital signal processing in the video system circuit 3 in synchronization with the video system clock 4 and output from the video output terminal 9 as an analog signal. The voice data is digitally processed by the voice system circuit 6 in synchronization with the voice system clock 7 and is converted into an analog signal by the voice output terminal 10.
Will be output. All of these controls are performed by the microcomputer 1. In order to turn off the video and audio output, the video system control OFF terminal 5 and the audio system control OFF
Stop clock oscillation using pin 8. Although different from FIG. 1, not only the clock may be turned off, but the power may be turned off for each circuit block. Further, when the CD reproducing device is provided with a power source and the remote controller 11 performs input selection to set the CD mode, the power source of the CD reproducing device 14 is turned on, and
When input selection is performed by the remote controller 11 and the input switching circuit 17 is operated to select a TV broadcast program, C
The power of the D playback device 14 may be turned off.

In FIG. 2, the CD reproducing device 14 is provided in a casing (not shown) of the television device. The control device 13 including a microcomputer controls the television device according to a control command supplied from the remote controller 11 operated by the user through the remote control light receiving circuit 12. It also controls movement. The input switching circuit 17, under the control of the control device 13, is a TV broadcast program selected by the tuner 15, a signal from an external device such as a VTR connected to the external input terminal 16, and a signal from the CD reproducing device 14. Select one of The signal selected by the input switching circuit 17 is processed by the signal processing circuit 18, and then supplied to the cathode ray tube 19 for image display, and sound is output from the speaker 20.

Further, as an output display of the CD reproducing device, in addition to the cathode ray tube 19 and the speaker 20 of the TV device as described above, an external V terminal is provided via an external output terminal 22.
It is configured so that it can be recorded in TR or can be displayed as video or output as audio to another TV device. In this case, the signal switching circuit 21 is controlled by the control device 13 to select the output of the CD reproducing device 14. It is supposed to do.

Next, the operation of the embodiment of the present invention will be described with reference to FIG.
A description will be given using 2 and 3.

The input switching circuit 17 of the television device with a built-in CD reproducing device is provided with an output from a tuner for receiving a TV broadcast program, an external input such as a reproducing output from another VTR, and a CD reproducing. The reproduction output from the device is input, and one of the inputs is selected by the control device 13 in response to a command from the remote controller 11. Further, while the input switching circuit 17 selects a TV broadcast program and displays the broadcast program on the cathode ray tube 19, the output signal from the CD reproducing device 14 is recorded on an external VTR or another TV device through the signal switching circuit 21. The remote controller 11 can give an instruction to display it via the control device 13.

When the inputs displayed on the cathode ray tube 19 and the speaker 20 are switched by the input switching circuit 17 except the output from the CD reproducing device, the crystal in the CD reproducing device is selected. Control device 1 including a clock generation unit such as an oscillator and a circuit block such as a PLL
Stop control is performed by 3. This allows crystal oscillators and PLLs
It is possible to prevent undesired radiation generated from the power supply and to stop unnecessary power consumption.

Further, the input switching circuit 17 is used for the TV tuner.
Even when the TV broadcast program is being watched by selecting NA-15, the CD reproducing apparatus is operated when the CD reproducing apparatus is operated to record on an external VTR or to be displayed on another TV apparatus. Since the internal clock generator and its circuit block operate, interference radiation to the tuner 15 is generated, but it is devised to suppress it to a minimum.

That is, firstly, when the disc is not loaded in the CD reproducing device or when the disc cannot be identified, the microcomputer in the CD reproducing device detects this state, and the clock generator or That is, the circuit block is stopped and controlled. Second, when a disc is loaded in the CD player, the microcomputer in the CD player discriminates the type of the disc and controls only the clock generator and its circuit blocks required for the disc to operate. That is. Some discs have video data and audio data recorded, some have only video data recorded, and some have only audio data recorded. For example, when a CD digital audio disk is inserted, only audio data is recorded on the disk, so a command is issued to stop the operation of the clock generator for controlling the video signal or the control terminal of the circuit block. .

Referring to FIG. 3, the disc is not inserted in the CD reproducing device 14. At this time, C
In the D reproduction device 14, the operation of the clock generators 4 and 7 or the circuit block thereof for processing the video and audio signals is stopped. Here, when a CD digital audio disc is inserted, the microcomputer 1 operates in order to determine the presence and type of the disc,
Recognize the type of disk (steps 101, 30)
1). Since this disc has no video data but only audio data, only the operation of the clock generator 7 or its circuit block for processing an audio signal is performed at the time of reproduction. A command for operating only the clock generator 7 or the control terminal of this circuit block is sent from the controller 13 via the microcomputer 1 (step 305).

Next, in this state, when input selection is performed by the remote controller 11 and the input switching circuit 17 is operated to select the TV broadcast program (step 307), C
The controller 13 issues a command to stop the operation of the clock generator 7 or its circuit block for processing the audio signal in the D reproduction device 14.
It is sent via (step 309). From this state, the input is again selected by the remote controller 11, and the input switching circuit 17 is operated to set the CD mode (step 303).
When the reproduction is performed, a command for operating only the clock generator 7 or the circuit block for processing the audio signal in the CD reproducing device 14 is sent from the control device 13 via the microcomputer 1 (step 305).

Here, as a control method for operating or inactivating the video system clock or the audio system clock, a method of temporarily operating both system clocks and then stopping an unnecessary clock, and a necessary clock There is a method of operating only that, and it can be selected appropriately.

[0025]

As described above, according to the present invention,
The present invention is effective in preventing and reducing the disturbing radiation caused by the operation of the CD reproducing device, which is a problem when the CD reproducing device is built in the television receiver. Further, since the control is automatically performed in conjunction with the input switching of the television device, the usability is not impaired.

Furthermore, when a TV broadcast program is selected,
When using a music-only CD or a video-only CD, the minimum power consumption is required.

[Brief description of drawings]

FIG. 1 is a diagram showing an embodiment of a CD reproducing apparatus according to the present invention.

FIG. 2 is a diagram showing an embodiment of a television device with a built-in CD reproducing device according to the present invention.

FIG. 3 is a flowchart showing a specific example of the operation of the embodiment shown in FIGS.

[Explanation of symbols]

 1 Microcomputer in CD player 2 CD drive 3 Video system circuit 4 Video system clock 5 Video system circuit control OFF terminal 6 Audio system circuit 7 Audio system clock 8 Audio system circuit control OFF terminal 9 Video output terminal 10 Audio output Terminal 11 Remote control 12 Remote control light receiving circuit 13 Control device 14 CD playback device 15 Tuner 16 External input terminal 17 Input switching circuit 18 Signal processing circuit 19 CRT 20 Speaker 21 Signal switching circuit 22 External output terminal 23 External device

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Satoshi Yamashita 292 Yoshida-cho, Totsuka-ku, Yokohama-shi, Kanagawa Inside the Hitachi Media Visual Media Research Center (72) Inventor Koji Kamogawa 292 Yoshida-cho, Totsuka-ku, Yokohama-shi, Kanagawa Hitachi, Ltd. Multimedia Systems Division

Claims (11)

[Claims] 1. A television apparatus having a plurality of signal input terminals and an input switching circuit capable of selecting any one of the inputs can be used in a plurality of types such as video CD, photo CD, CD graphics, and CD digital audio. In a television device with a built-in CD reproducing device, which integrates a CD reproducing device capable of reproducing a disc, the CD reproducing device is interlocked with the input switching circuit switching from an output signal of the CD reproducing device to another signal. A television device with a built-in CD reproducing device, comprising a control means for making the device inoperable, and preventing interference radiation from the CD reproducing device to the television device. 2. The control device according to claim 1, wherein the control device operates the CD reproducing device and outputs the output of the CD reproducing device to an external device even when the input switching circuit selects a signal other than the output signal of the CD reproducing device. A television device with a built-in CD reproducing device, which is controlled so as to be connected to the VTR or another television device. 3. The television device with a built-in CD reproducing device according to claim 1, further comprising a remote controller for sending respective commands to the control device. 4. A television device having a plurality of signal input terminals and an input switching circuit capable of selecting any one of the inputs, and a plurality of types of video CD, photo CD, CD graphics, CD digital audio, etc. In a television device with a built-in CD reproducing device, which integrates a CD reproducing device capable of reproducing a disc, the CD reproducing device is interlocked with the input switching circuit switching from an output signal of the CD reproducing device to another signal. In addition to the function to make the device inoperative, even when the input switching circuit selects a signal other than the output signal of the CD reproducing device and is displaying an image, the CD reproducing device is operated to output the output of the CD reproducing device. Is a control device for controlling so that it also has a function of connecting an external VTR or other television device, CD playback device embedded television apparatus, characterized in that a click existence and type detecting means. 5. A television device with a built-in CD reproducing device according to claim 4, wherein the disc presence / absence / type detecting means detects that the disc is not loaded and deactivates the CD reproducing device. 6. The television device with a built-in CD reproducing device according to claim 4, wherein the disc presence / absence detecting unit detects that the disc type cannot be discriminated and renders the CD reproducing device inoperative. 7. The CD reproducing device according to claim 1, 2, 3, 4 or 5, wherein the CD reproducing device is inoperative because the clock generating unit and its circuit block necessary for reproducing the disc are not operated. Television device with built-in playback device. 8. The operation of the CD reproducing apparatus according to claim 1, wherein the power source in the CD reproducing apparatus is OF
A television device with a built-in CD player, which is controlled so as to perform F. 9. The audio system clock generating section and its circuit block or the video system clock generating section and its circuit, which are unnecessary for reproducing the disk by detecting the type of the disk by the disk presence / absence type detecting means. A television device with a built-in CD reproducing device, characterized in that a circuit block is made inoperative. 10. The television device with a built-in CD reproducing device according to claim 6 or 8, wherein the CD reproducing device is inoperative when clock oscillation is stopped. 11. The CD reproducing device according to claim 6, wherein the CD reproducing device does not operate when the power supply circuit of the clock generator and its circuit block is turned off.
Television device with built-in playback device.