CN2726246Y - HDMI standard signal generating circuit and DVD polayer - Google Patents
HDMI standard signal generating circuit and DVD polayer Download PDFInfo
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- CN2726246Y CN2726246Y CN 200420061561 CN200420061561U CN2726246Y CN 2726246 Y CN2726246 Y CN 2726246Y CN 200420061561 CN200420061561 CN 200420061561 CN 200420061561 U CN200420061561 U CN 200420061561U CN 2726246 Y CN2726246 Y CN 2726246Y
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Abstract
The utility model discloses an HDMI standard signal generating circuit and DVD player, comprising a first interface circuit, a second interface circuit, an HDMI processing module, and a video signal processing module. The input end of the video signal processing module is connected with the first interface circuit to respond to the R/G/B or Y/U/V three channels of analog video signals output by the input end. Every channel of analog video signals is transformed to eight bits digital video signals, and the total number of digital video signals is twenty four bits. Twenty four output data lines are connected with the HDMI processing module, and the input end of the HDMI processing module responds to digital audio signals and digital video signals output by the second interface circuit. Three groups of TDMS data output differential signals and one group of TDMS clock output differential signals are generated, and the output end of the HDMI processing module is coupled to the input end of the HDMI interface of video equipment. Images exported to the video equipment by the utility model has high brightness and contrast, and gradations of color are rich.
Description
[technical field]
The utility model relates to a kind of video, audio signal processing circuit, relates in particular to the DVD player that a kind of HDMI standard signal produces circuit and uses this circuit.
[background technology]
At present, field of video displaying has entered the high definition epoch, and since 2004, a kind of new audio-video interface standard is the favor that HDMI (High Definition Multimedia Interface) (HDMI) just is being subjected to household electrical appliances manufacturers such as increasing IC manufacturer, television set.HDMI is a kind of new Digital interface transmission standard with digital audio and digital video, and 3 groups of TDMS dateout differential signals and 1 group of TDMS output clock differential signal are arranged in the signal that it requires to import.Correspondingly,, also to cooperate, must export the signal that meets the HDMI standard with the HDMI interface if DVD player will realize that high definition shows by TV.Present processing scheme is: in master chip the analog video signal process is handled, export 8 data video lines, directly output in the HDMI TX chip and carry out digitized processing, and handle the back with audio signal and export 3 groups of TDMS (Transition Minimized Differential Signaling, the differential signal of transition minimized) dateout differential signal and 1 group of TDMS output clock differential signal are to meet the HDMI standard.This processing mode is ITU601/656, and directly digitized processing though simplified design, has equally also been damaged the index of video, and the brightness and contrast of output signal is not enough, and color and luster is not bright-coloured, gradation is abundant inadequately.
[summary of the invention]
Main purpose of the present utility model is exactly in order to solve the problem of the brightness and contrast of DVD output signal in the prior art, provide a kind of HDMI standard signal to produce circuit, make the output of DVD player can meet the HDMI standard, and bright in colour, gradation abundant.
Another purpose of the present utility model is exactly in order to solve the problem of the brightness and contrast of DVD output signal in the prior art, a kind of DVD player to be provided, and its output can meet the HDMI standard, and bright in colour, gradation is abundant.
For achieving the above object, a kind of HDMI standard signal that the utility model proposes produces circuit, comprising:
Be used to receive and export first interface circuit of analog video signal;
Be used to receive second interface circuit with the outputting digital audio signal;
Be used to produce the HDMI processing module of three groups of TDMS dateout differential signals and one group of TDMS output clock differential signal, its input links to each other with the output of described second interface circuit, and its output then is coupled to the HDMI interface input of video equipment;
A video signal processing module, its input links to each other with the output of described first interface circuit, and output is coupled to described HDMI processing module, is used for converting this road analog video signal to 2 at the every road analog video signal that receives
nThe bit digital vision signal is by 2
nThe bar output data line is coupled to described HDMI processing module, and wherein n is more than or equal to 3.
As a further improvement on the present invention, this HDMI standard signal produces circuit and also comprises filter resistance, described filter resistance is connected between every the output data line and described HDMI processing module input of video signal processing module, is used to make data-signal more level and smooth.
Described first interface circuit comprises the reception and the output of R/G/B or Y/U/V three road analog video signals, and described video signal processing module comprises the input of R/G/B or Y/U/V three road analog video signals.
For achieving the above object, a kind of DVD player that the utility model proposes comprises:
Be used to export first processing unit of analog video signal;
Second processing unit that is used for the outputting digital audio signal;
Be used to produce the HDMI processing module of three groups of TDMS dateout differential signals and one group of TDMS output clock differential signal, its input links to each other with the output of described second processing unit, and its output then is coupled to the HDMI interface input of video equipment;
A video signal processing module, its input links to each other with the output of described first processing unit, and output is coupled to described HDMI processing module, is used for converting this road analog video signal to 2 at the every road analog video signal that receives
nThe bit digital vision signal is by 2
nThe bar output data line is coupled to described HDMI processing module, and wherein n is more than or equal to 3.
As a further improvement on the present invention, this DVD player also comprises filter resistance, and described filter resistance is connected between every the output data line and described HDMI processing module input of video signal processing module, is used to make data-signal more level and smooth.
Described first processing unit comprises the output of R/G/B or Y/U/V three road analog video signals, and described video signal processing module comprises the input of R/G/B or Y/U/V three road analog video signals.
The beneficial effects of the utility model are: 1) every road analog video signal is at least 8 data wires through treatment conversion, promptly represent the road analog video signal imported by at least 8 digital signal, for R/G/B or Y/U/V three road analog video signals, then have 24 data wires at least, R, G, B signal or brightness and two color difference signals can be told more multi-layered time.2) design has filter resistance between every output data line of video signal processing module and described HDMI processing module input, because frequency height, the transmitting speed of data-signal are fast, what be difficult to avoid has some spikes, and filter resistance can be removed spike, makes signal more level and smooth.
Feature of the present utility model and advantage will be elaborated in conjunction with the accompanying drawings by embodiment.
[description of drawings]
Fig. 1 represents the functional-block diagram of a kind of embodiment of the present utility model;
Fig. 2 represents the circuit structure diagram of a kind of embodiment of the present utility model.
[embodiment]
Embodiment one, as shown in Figure 1, first interface circuit receives R/G/B or Y/U/V three road analog video signals and exports video signal processing module to, video signal processing module is treated to every road analog video signal eight-digit number word signal and exports the HDMI processing module to by eight data wires, and the revolution of three road analog video signals changes 24 data wires into; Second interface circuit receives digital audio and video signals and exports the HDMI processing module to, digital audio and video signals can be the one group of data that comprises digital audio master clock, left and right sides clock, bit clock and four voice datas, transfer to the HDMI processing module by seven data wires respectively, HDMI processing module responding digital vision signal and digital audio and video signals, through handling, output meets three groups of TDMS dateout differential signals and one group of TDMS output clock differential signal of HDMI standard, and these four groups of data differential signals is exported to the HDMI interface input of video equipment.
As shown in Figure 2, in the present embodiment, first interface circuit and second interface circuit are integrated into a connector CON2, and video signal processing module is that model is the integrated chip U1 of MST9883C, and the HDMI processing module is that model is the integrated chip U2 of SIL9030.Integrated chip U1 response is by the R/G/B or Y/U/V three road analog video signals of connector CON2 output, through amplifying and the A/D conversion, export 24 way word signals, every road analog video signal is converted into 8 position digital signals, output to integrated chip U2 by 24 video data lines altogether, between every the video data delivery outlet of integrated chip U1 and integrated chip U2, be in series with filter resistance, 24 filter resistances are grouped into three resistor chains 1, be used to remove the spike of digital video signal, make signal more level and smooth.
Integrated chip U2 responds simultaneously by connector CON2 input digit audio frequency master clock, left and right sides clock, bit clock and four voice datas, through handling, export three groups of TDMS dateout differential signals and one group of TDMS output clock differential signal, and export the HDMI interface of video equipment by connector CON3 to.Through this processing of circuit, make output both can meet the HDMI standard, cooperate with the HDMI interface of video equipment, the luminance signals of output and contrast are improved, gradation is abundant.
Embodiment two, compare with embodiment one, different is that video signal processing module is different with the HDMI processing module, the video signal processing module response R/G/B or Y/U/V three road analog video signals of present embodiment, through handling, every road analog video signal is converted into 16 position digital signals, output to the HDMI processing module by 48 video data lines altogether, the HDMI processing module is handled 48 road video data signals and digital audio and video signals process, export three groups of TDMS dateout differential signals and one group of TDMS output clock differential signal, and export the HDMI interface of video equipment by connector CON3 to.
Embodiment three, the foregoing description one, two can be applied in the circuit of DVD player, master chip is as first processing unit of output analog video signal, R/G/B or Y/U/V three road analog video signals that can directly the master chip of DVD player be exported are input to video signal processing module, the digital audio and video signals that will produce as the master chip of second processing unit outputs to the HDMI processing module, digital audio and video signals can be selected the SPDIF signal as required, or select another the group digital audio and video signals be the digital audio master clock, left and right sides clock, bit clock and four voice datas are by seven data wire data signals transmitted.The HDMI processing module is handled video data signal and digital audio and video signals process, exports three groups of TDMS dateout differential signals and one group of TDMS output clock differential signal, and exports the HDMI interface of video equipment to by connector CON3.In the present embodiment, master chip, video signal processing module and HDMI processing module adopt I
2The C bus.
In sum, the utility model outputs to brightness and contrast's height of the image of video equipment, and gradation is abundant.
Claims (10)
1. a HDMI standard signal produces circuit, comprising:
Be used to receive and export first interface circuit of analog video signal;
Be used to receive second interface circuit with the outputting digital audio signal;
Be used to produce the HDMI processing module of three groups of TDMS dateout differential signals and one group of TDMS output clock differential signal, its input links to each other with the output of described second interface circuit, and its output then is coupled to the HDMI interface input of video equipment; It is characterized in that:
Also comprise a video signal processing module, its input links to each other with the output of described first interface circuit, and output is coupled to described HDMI processing module, is used for converting this road analog video signal to 2 at the every road analog video signal that receives
nThe bit digital vision signal is by 2
nThe bar output data line is coupled to described HDMI processing module, and wherein n is more than or equal to 3.
2. HDMI standard signal as claimed in claim 1 produces circuit, it is characterized in that: described video signal processing module is coupled to described HDMI processing module at the every road analog video signal that receives by eight output data lines.
3. HDMI standard signal as claimed in claim 2 produces circuit, it is characterized in that: also comprise filter resistance, described filter resistance is connected between every the output data line and described HDMI processing module input of video signal processing module, is used to make data-signal more level and smooth.
4. produce circuit as each described HDMI standard signal in the claim 1 to 3, it is characterized in that: described first interface circuit comprises the reception and the output of R/G/B or Y/U/V three road analog video signals, and described video signal processing module comprises the input of R/G/B or Y/U/V three road analog video signals.
5. HDMI standard signal as claimed in claim 4 produces circuit, it is characterized in that: second interface circuit comprises the reception and the output of digital audio master clock, left and right sides clock, bit clock and four voice datas, and described HDMI processing module comprises the input of digital audio master clock, left and right sides clock, bit clock and four voice datas.
6. DVD player comprises:
Be used to export first processing unit of analog video signal;
Second processing unit that is used for the outputting digital audio signal;
Be used to produce the HDMI processing module of three groups of TDMS dateout differential signals and one group of TDMS output clock differential signal, its input links to each other with the output of described second processing unit, and its output then is coupled to the HDMI interface input of video equipment; It is characterized in that:
Also comprise a video signal processing module, its input links to each other with the output of described first processing unit, and output is coupled to described HDMI processing module, is used for converting this road analog video signal to 2 at the every road analog video signal that receives
nThe bit digital vision signal is by 2
nThe bar output data line is coupled to described HDMI processing module, and wherein n is more than or equal to 3.
7. DVD player as claimed in claim 1 is characterized in that: described video signal processing module is coupled to described HDMI processing module at the every road analog video signal that receives by eight output data lines.
8. DVD player as claimed in claim 2 is characterized in that: also comprise filter resistance, described filter resistance is connected between every the output data line and described HDMI processing module input of video signal processing module, is used to make data-signal more level and smooth.
9. as each described DVD player in the claim 1 to 3, it is characterized in that: described first processing unit comprises the output of R/G/B or Y/U/V three road analog video signals, and described video signal processing module comprises the input of R/G/B or Y/U/V three road analog video signals.
10. DVD player as claimed in claim 4, it is characterized in that: second processing unit comprises the output of digital audio master clock, left and right sides clock, bit clock and four voice datas, and described HDMI processing module comprises the input of digital audio master clock, left and right sides clock, bit clock and four voice datas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420061561 CN2726246Y (en) | 2004-09-28 | 2004-09-28 | HDMI standard signal generating circuit and DVD polayer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420061561 CN2726246Y (en) | 2004-09-28 | 2004-09-28 | HDMI standard signal generating circuit and DVD polayer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2726246Y true CN2726246Y (en) | 2005-09-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420061561 Expired - Fee Related CN2726246Y (en) | 2004-09-28 | 2004-09-28 | HDMI standard signal generating circuit and DVD polayer |
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|---|---|
| CN (1) | CN2726246Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101471061B (en) * | 2007-12-27 | 2010-09-29 | 奇景光电股份有限公司 | Audio clock regenerator with precise parameter transformer |
| CN114143492A (en) * | 2020-09-02 | 2022-03-04 | 深圳市显盈科技股份有限公司 | Audio and video conversion circuit and live broadcast device |
-
2004
- 2004-09-28 CN CN 200420061561 patent/CN2726246Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101471061B (en) * | 2007-12-27 | 2010-09-29 | 奇景光电股份有限公司 | Audio clock regenerator with precise parameter transformer |
| CN114143492A (en) * | 2020-09-02 | 2022-03-04 | 深圳市显盈科技股份有限公司 | Audio and video conversion circuit and live broadcast device |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |