CN201054650Y - Video output circuit and STB with video output circuit - Google Patents
Video output circuit and STB with video output circuit Download PDFInfo
- Publication number
- CN201054650Y CN201054650Y CNU2007200232324U CN200720023232U CN201054650Y CN 201054650 Y CN201054650 Y CN 201054650Y CN U2007200232324 U CNU2007200232324 U CN U2007200232324U CN 200720023232 U CN200720023232 U CN 200720023232U CN 201054650 Y CN201054650 Y CN 201054650Y
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- signal
- circuit
- video
- output circuit
- output
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Abstract
The utility model discloses a set-top box, the video output circuit of which includes a video processing chip, a signal inputting circuit and a signal outputting circuit. The video processing chip connects the signal inputting circuit with the signal outputting circuit, and the video processing chip V1 adopts a chip which can output Y/C signal and CVBS signal. The set-top box adopting the above video outputting circuit can add a compound video signal CVBS output when outputting the Y/C signal, and then the performance of the product is improved.
Description
Technical field
The utility model relates to a kind of video output circuit, particularly relates to the video output circuit that set-top box is used.
Background technology
At present, the output interface of video equipment is more and more, causes its output circuit part to become increasingly complex, and the conversion of signals chip of employing is on the increase, and the Butut of circuit board and product compact had great restriction.
Set-top box is as the less video conversion apparatus of a kind of volume, on market, there is how tame manufacturer all producing, the video output of basic model set-top box can only be exported Y/C (brightness/chroma) signal, and y/c signal involves amplification after filtration, and Y_OUT and the C_OUT signal that obtains outputed on the S terminal.This kind set-top box can only be exported a kind of vision signal, the innovation of unfavorable product and the lifting market competitiveness.
The utility model content
The utility model provides a kind of video output circuit at the baroque defective of video output circuit in the prior art, and this circuit also has simple in structure when finishing the output of multiple different model vision signal at the same time, the advantage that efficient is high.
Adopt the set-top box of above-mentioned video output circuit can export two kinds of dissimilar vision signals at least, solved the defective that present basic model set-top box can only be exported a kind of y/c signal.
At the technical solution that video output circuit adopted be:
A kind of video output circuit comprises video processor, signal input circuit and signal output apparatus, and video processor is connected signal input circuit with signal output apparatus, the dissimilar signal of video processor output at least two groups.
The dissimilar signal of above-mentioned at least two groups is two groups of dissimilar vision signals.
Above-mentioned signal input circuit comprises filter circuit and amplifying circuit, and input signal is carried out filtering and amplification.
Above-mentioned vision signal is y/c signal and CVBS signal.
Above-mentioned signal output apparatus comprises S terminal and RCA terminal, and described signal output apparatus outputs to the S terminal with y/c signal, and the CVBS signal is outputed to the RCA terminal.
At the set-top box that adopts above-mentioned video output circuit, its technical solution is:
Set-top box with described video output circuit, its video output circuit comprises video processor, signal input circuit and signal output apparatus, video processor is connected signal input circuit with signal output apparatus, the dissimilar signal of video processor output at least two groups.
The dissimilar signal of above-mentioned at least two groups is two groups of dissimilar vision signals.
Above-mentioned signal input circuit comprises filter circuit and amplifying circuit, and input signal is carried out filtering and amplification.
Above-mentioned vision signal is y/c signal and CVBS signal.
Above-mentioned signal output apparatus comprises S terminal and RCA terminal, and described signal output apparatus outputs to the S terminal with y/c signal, and the CVBS signal is outputed to the RCA terminal.
The beneficial effects of the utility model: the set-top box that adopts above-mentioned video output circuit, the brightness signal Y and the carrier chrominance signal C that not only can finish input carry out filtering, processing and amplifying, can also increase a composite video signal CVBS output, improve the performance of product.And reduce cost probably.
Description of drawings
Fig. 1 is that the circuit of the utility model execution mode connects block diagram.
Fig. 2 is electrical chain map interlinking of the present utility model.
Describe of the present utility model below in conjunction with accompanying drawing:
Embodiment
Execution mode 1
In conjunction with Fig. 1, Fig. 2, video output circuit comprises video processor V1, signal input circuit and signal output apparatus, video frequency processing chip V1 is connected signal input circuit with signal output apparatus, video frequency processing chip V1 adopts the chip that can export y/c signal and CVBS signal.Signal input circuit is with y/c signal input video process chip V1, video frequency processing chip V1 inner integrated filter circuit and amplifying circuit, and, y/c signal is outputed to the S terminal by signal output apparatus with input signal filtering, amplification, the CVBS signal is outputed to the RCA terminal.
Execution mode 2
In conjunction with Fig. 1, Fig. 2, set-top box with described video output circuit, its video output circuit comprises video processor V1, signal input circuit and signal output apparatus, video frequency processing chip V1 is connected signal input circuit with signal output apparatus, video frequency processing chip V1 adopts the chip that can export y/c signal and CVBS signal.Signal input circuit is with y/c signal input video process chip V1, video frequency processing chip V1 inner integrated filter circuit and amplifying circuit, and, y/c signal is outputed to the S terminal by signal output apparatus with input signal filtering, amplification, the CVBS signal is outputed to the RCA terminal.
Claims (10)
1. a video output circuit comprises video processor, signal input circuit and signal output apparatus, and video processor is connected signal input circuit with signal output apparatus, it is characterized in that: the dissimilar signal of described video processor output at least two groups.
2. video output circuit according to claim 1 is characterized in that: the dissimilar signal of described at least two groups is two groups of dissimilar vision signals.
3. video output circuit according to claim 1 and 2 is characterized in that: described signal input circuit comprises filter circuit and amplifying circuit, and input signal is carried out filtering and amplification.
4. video output circuit according to claim 2 is characterized in that: described vision signal is y/c signal and CVBS signal.
5. video output circuit according to claim 4 is characterized in that: described signal output apparatus comprises S terminal and RCA terminal, and described signal output apparatus outputs to the S terminal with y/c signal, and the CVBS signal is outputed to the RCA terminal.
6. the set-top box that has described video output circuit, its video output circuit comprises video processor, signal input circuit and signal output apparatus, video processor is connected signal input circuit with signal output apparatus, it is characterized in that: the dissimilar signal of described video processor output at least two groups.
7. set-top box according to claim 6 is characterized in that: the dissimilar signal of described at least two groups is two groups of dissimilar vision signals.
8. according to claim 6 or 7 described set-top box, it is characterized in that: described signal input circuit comprises filter circuit and amplifying circuit, and input signal is carried out filtering and amplification.
9. set-top box according to claim 6 is characterized in that: described vision signal is y/c signal and CVBS signal.
10. set-top box according to claim 9 is characterized in that: described signal output apparatus comprises S terminal and RCA terminal, and described signal output apparatus outputs to the S terminal with y/c signal, and the CVBS signal is outputed to the RCA terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200232324U CN201054650Y (en) | 2007-06-15 | 2007-06-15 | Video output circuit and STB with video output circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200232324U CN201054650Y (en) | 2007-06-15 | 2007-06-15 | Video output circuit and STB with video output circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201054650Y true CN201054650Y (en) | 2008-04-30 |
Family
ID=39394307
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200232324U Expired - Fee Related CN201054650Y (en) | 2007-06-15 | 2007-06-15 | Video output circuit and STB with video output circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201054650Y (en) |
-
2007
- 2007-06-15 CN CNU2007200232324U patent/CN201054650Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080430 Termination date: 20110615 |