CN1988638A - Quiet controller of video output on optic disc device - Google Patents
Quiet controller of video output on optic disc device Download PDFInfo
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- CN1988638A CN1988638A CN 200510111822 CN200510111822A CN1988638A CN 1988638 A CN1988638 A CN 1988638A CN 200510111822 CN200510111822 CN 200510111822 CN 200510111822 A CN200510111822 A CN 200510111822A CN 1988638 A CN1988638 A CN 1988638A
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Abstract
The invention relates to the method for mute-controlling of the output on the CD Video, which includes: a decoder-chip decodes the MPEG video data into video data, then it processes the data into analog video signals, and the connecting sockets outputs different analog video signals respectively to the external equipments, and a detector detects whether the several video output-interfaces are connected with the external equipments, and a Muting Circuit carries out mute-signal processing on the signals of the video output interface which is not connected to the external equipments. The invention detects any one of video output-interfaces in the DVD players or DVD video recorders, for instance the output interface components, the S-Video output interface and composite output interface which is not connected to the external equipments as television, meanwhile, it selectively controls the video output mute in order to effectively prevent the occurrence of poisonous unnecessary electromagnetic waves.
Description
Technical field
The present invention relates to the squelch control device of the video output on the compact disk equipment, relate in particular to the video output squelch control device that is used on the compact disk equipment of control of video output noise elimination (Mute) action selectively.It can make in the middle of several video output interfaces that vision signal do not comprised in the RCA socket by for example DVD player compact disk equipments such as (DVD-Player) any one not export with the output interface that external connection apparatus such as TV is connected.
Background technology
In general, the DVD player compact disk equipments such as (DVD-Player) that can carry out the regeneration of high image quality video data and high tone quality voice data has for a long time been used by universal.For example, on described DVD player, as shown in Figure 1, include video decoder chip 10, video muting circuit 11 and RCA socket 12 etc.
On the other hand, on described video decoder chip 10, from CDs such as DVD, reading and born again MPEG video data stream decoding becomes original digital of digital video data, carry out signal processing and D/A conversion by the digital of digital video data of variety of way after then, export Y/Pr/Pb signal more respectively, as the y/c signal of simulation S video (S-Video) signal with as the DVBS signal of analog composite (Composite) signal as simulated assembly (Component) signal to this decoding processing.
As a reference, the described action that the MPEG video data stream decoding is processed into original digital of digital video data can be carried out on described video decoder chip 10, and the digital of digital video data that described decoding is come out can carry out on other video encoder chip (Video Encoder Chip) (not shown) with the action that modularity, S video mode and complex method are carried out signal processing and D/A conversion respectively.
On the other hand, in the middle of described video muting circuit 11, carried out the noise elimination processing to the signal of RCA socket 12 outputs from described video decoder chip 10 temporarily.For example, in the moment that the system power supply of DVD player is opened, be imported into noises (Noise) in the middle of the described RCA socket 12 and carried out noise elimination automatically and handle, thereby stop the noise picture to be displayed on the television set that connects by described RCA socket 12.
And, on described video muting circuit 11, just remove the noise elimination action if surpassed official hour (for example 3 seconds), thereby Y/Pr/Pb signal and y/c signal, the CVBS signal of output on the described video decoder chip 10 normally exported to RCA socket 12.So, when the user used that at least more than one output interface is connected with television set in assembly output interface, S video output interface and the compound output interface that is comprised in the described RCA socket 12, the user just can enjoy the video image that is output through described output interface by television image.
But, in the middle of several output interfaces that in described RCA socket, comprised, even output interface is not connected with external connection apparatus, but, can produce unnecessary harmful electromagnetic problem so exist because vision signal can be output to the outside by this output interface.
Summary of the invention
The present invention proposes for addressing the above problem just, and its purpose is to provide a kind of static limiter that is used for controlling selectively the video output on the compact disk equipment that carries out video output noise elimination (Mute) action.In the output interface that any one does not have with television set external connection apparatus such as (TV) is connected in the middle of several video output interfaces that utilize this device to be comprised in detecting the RCA socket of compact disk equipment, stop vision signal to be exported to the outside by this output interface.
To achieve these goals, the squelch control device that with the present invention is the video output on the compact disk equipment of foundation comprises following part: after the MPEG video data stream decoding is become video data, respectively it is carried out signal processing and conversion with different modes, make it to become the video decoder chip of analog video signal; Be provided with the gang socket that the analog video signal that is used for described different modes outputs to several output interfaces in the middle of the external connection apparatus respectively; Be used for detecting the joint detection portion that whether is connected with external connection apparatus on described several video output interfaces; Be used for selectively the signal that is imported on any one video output interface that does not connect described external connection apparatus being carried out the video muting circuit that noise elimination is handled.
And described gang socket is meant the RCA socket that includes analog composite output interface, S video output interface, compound output interface.Described joint detection portion is characterised in that the variation that detects the voltage levvl on the virtual interface that is comprised separately on this compound output interface, S video output interface and the compound output interface, whether is connected with external equipment thereby detect.
And, described video muting circuit is characterised in that: when system power supply is opened, after the signal that analog composite output interface, S video output interface and compound output interface are discerned is all handled by noise elimination, only keep noise-limited condition, and remove the noise-limited condition of all the other output interfaces at described certain output interface that is not connected with external connection apparatus.
Effect of the present invention:
In sum, what have said structure is the squelch control device of the video output on the compact disk equipment of foundation with the present invention, it is a very useful invention, several video output interfaces that it can be comprised in the socket that detects DVD player (DVD-Player) or DVD videocorder compact disk equipments such as (DVD-Recorder), assembly (Component) output interface for example, in the middle of S video (S-Video) output interface and compound (Composite) output interface any one be not with output interface that external equipment such as TV is connected the time, control of video output noise elimination (Mute) action selectively, so that vision signal exports without this interface, thereby prevent unnecessary harmful electromagnetic wave effectively.
For further specifying above-mentioned purpose of the present invention, design feature and effect, the present invention is described in detail below with reference to accompanying drawing.
Description of drawings
Fig. 1 is the schematic diagram that shows video output squelch control apparatus structure on the normal optical disk equipment;
Fig. 2 shows with the present invention to be the schematic diagram of video output squelch control apparatus structure on the compact disk equipment of foundation;
Fig. 3 shows with the present invention to be the schematic diagram of the part detailed structure of video output squelch control device on the compact disk equipment of foundation.
The symbol description of major part in the accompanying drawing
10,20: video decoder chip 11,21: the video muting circuit
12,22:RCA socket 23: joint detection portion
Embodiment
Below with reference to accompanying drawings to being that the desirable embodiment of the squelch control device of the video output on the compact disk equipment of foundation is elaborated with the present invention.
At first, be that the video output squelch control device of foundation is applicable to DVD player (DVD-Player) or DVD videocorder polytype compact disk equipments such as (DVD-Recorder) with the present invention.For example, on described compact disk equipment, as shown in Figure 2, comprise video decoder chip 20, video muting circuit 21, RCA socket and joint detection portion 23 etc.
On the other hand, described video muting circuit 21 by several separately the noise elimination portion of switch noise elimination action (for example: M1, M2 M3) constitutes.Explanation with reference to Fig. 1 and front, on described video decoder chip 20, when from CDs such as DVD, reading and after born again MPEG video data stream is decoded into digital of digital video data, digital of digital video data after decoded carries out signal processing and D/A conversion to this with multiple mode, exports Y/Pr/Pb signal as assembly (Component) signal then respectively, as the y/c signal of S video (S-Video) signal with as the CVBS signal of analog composite (Composite) signal.
And, describedly become the action of original digital of digital video data on described video decoder chip 20, to carry out the MPEG video data stream decoding.And can on other video encoder chip (Video Encoder Chip) (not shown), carry out the action that described digital of digital video data after decoded carries out signal processing and D/A conversion respectively with modularity, S video mode and complex method.
On the other hand, on described video muting circuit 21, the signal that outputs to the RCA socket 22 from described video decoder chip 20 is carried out noise elimination (Mute) processing simultaneously, for example, system power supply in DVD player is opened moment of (Power-On), the noise (Noise) that is imported in the described RCA socket 22 is carried out the noise elimination processing automatically, thereby stops the noise picture to be displayed on the television set (TV) that couples together by RCA socket 22.
And, in described joint detection portion 23, to whether being connected with television set external equipments such as (TV) on assembly output interface included in the described RCA socket 22 and S video output interface, the compound output interface detect, for example Fig. 3 is shown, in the middle of assembly (Component) output interface that is comprised in the described RCA socket 22, comprise interface, ground connection (GND) interface and virtual (Dummy) interface of being used for exporting the Y/Pr/Pb signal.
And, in the middle of S video (S-Video) output interface that is comprised on the described RCA socket 22, comprise interface, ground connection (GND) interface and virtual (Dummy) interface of being used for exporting y/c signal.And comprise interface, ground connection (GND) interface and virtual (Dummy) interface that is used for exporting the CVBS signal in compound (Composite) output interface.For example, when external connection apparatus was connected on some output interfaces, the voltage levvl that the virtual interface in the relevant output interface is discerned descended to low (Low) level from high (High) level.
On the other hand, in described joint detection portion 23, as shown in Fig. 3, the voltage levvl of discerning when each virtual interface from high level when low level descends, for example, when from 5V voltage when zero (Zero) voltage descends, just detect on the output interface at this virtual interface place and normally connected external equipment; When keeping 5V voltage, just detect on the output interface at this virtual interface place and do not connect external equipment.
And, in described joint detection portion 23, included (the M1 of several noise elimination portions on the described video muting circuit 21, M2, M3) carried out noise elimination selectively and closed (Mute Off), for example, the level of the virtual interface in having only the S video output interface from 5V when zero (Zero) voltage descends, just determine in described joint detection portion 23, to have only on the S video output interface and be connected with television set, close (Mute Off) processing with regard to only carrying out noise elimination then, and remaining the 1st noise elimination portion (M1) and the 3rd noise elimination portion (M3) are still keeping noise elimination unlatching (Mute On) state at the 2nd included in the described video muting circuit 21 noise elimination portion (M2).
Therefore, have only by the S video output interface that is connecting television set and could normally export y/c signal, the assembly output interface and the compound output interface that do not connect television set then can not carry out the output of any signal, and then prevent to produce unnecessary electromagnetic wave.
Those of ordinary skill in the art will be appreciated that, above embodiment is used for illustrating the present invention, and be not to be used as limitation of the invention, as long as in connotation scope of the present invention, all will drop in the scope of claims of the present invention variation, the modification of the above embodiment.
Claims (5)
1, the squelch control device of the output of the video on a kind of compact disk equipment is characterized in that being made up of following components:
After the MPEG video data stream decoding is become video data, respectively it is carried out signal processing and conversion with different modes, make it to become the video decoder chip of analog video signal;
Be provided with the gang socket that the analog video signal that is used for described different modes outputs to several output interfaces in the middle of the external connection apparatus respectively;
Be used for detecting the joint detection portion that whether is connected with external equipment on described several video output interfaces;
Be used for selectively the signal that is imported on any one video output interface that does not connect external equipment being carried out the video muting circuit that noise elimination is handled.
2, the squelch control device of the output of the video on the compact disk equipment as claimed in claim 1 is characterized in that:
Described gang socket is meant the RCA socket that includes analog composite output interface, S video output interface, compound output interface.
3, the squelch control device of the output of the video on the compact disk equipment as claimed in claim 1 is characterized in that:
Described joint detection portion detects the variation of the voltage levvl that the virtual interface that comprised separately on analog composite output interface, S video output interface and the compound output interface in the described gang socket discerns, and whether is connected with external equipment thereby detect.
4, the squelch control device of the output of the video on the compact disk equipment as claimed in claim 1 is characterized in that:
Described video muting circuit is when system power supply is opened, after the signal that analog composite output interface in described gang socket, S video output interface and compound output interface are discerned is all handled by noise elimination, only keep noise-limited condition, and remove the noise-limited condition of all the other output interfaces at the described any output interface that is not connected with external equipment.
5, the squelch control device of the output of the video on the compact disk equipment as claimed in claim 1 is characterized in that:
Comprise in the described video muting circuit utilize described checkout equipment move respectively control several noise elimination portions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510111822 CN1988638A (en) | 2005-12-22 | 2005-12-22 | Quiet controller of video output on optic disc device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510111822 CN1988638A (en) | 2005-12-22 | 2005-12-22 | Quiet controller of video output on optic disc device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1988638A true CN1988638A (en) | 2007-06-27 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200510111822 Pending CN1988638A (en) | 2005-12-22 | 2005-12-22 | Quiet controller of video output on optic disc device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1988638A (en) |
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2005
- 2005-12-22 CN CN 200510111822 patent/CN1988638A/en active Pending
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