CN201904783U - DVI (digital visual interface) and audio remote transmission device based on optical fibers - Google Patents

DVI (digital visual interface) and audio remote transmission device based on optical fibers Download PDF

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Publication number
CN201904783U
CN201904783U CN2010206311478U CN201020631147U CN201904783U CN 201904783 U CN201904783 U CN 201904783U CN 2010206311478 U CN2010206311478 U CN 2010206311478U CN 201020631147 U CN201020631147 U CN 201020631147U CN 201904783 U CN201904783 U CN 201904783U
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China
Prior art keywords
audio
module
dvi
modular converter
data
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Expired - Fee Related
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CN2010206311478U
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Chinese (zh)
Inventor
程鹏
姚景国
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DALIAN GIGATEC ELECTRONICS Co Ltd
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DALIAN GIGATEC ELECTRONICS Co Ltd
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Priority to CN2010206311478U priority Critical patent/CN201904783U/en
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Abstract

The utility model discloses a DVI (digital visual interface) and audio remote transmission device based on optical fibers, which is characterized by comprising a host and a receiving terminal. The host converts video component signals Y/C (luminance signal/chrominance signal) received by a DVI receiving module and audio signals received by an audio A/D (analog/digital) conversion module into data 12S which is transmitted to a video serial/parallel conversion module to be converted into SDI (serial digital interface) data, then the SDI data is transmitted to the receiving terminal through an optical fiber transmitting module by means of optical fiber transmission, the receiving terminal receives the data transmitted from the host through an optical fiber receiving module and transmits the data to the video serial/parallel conversion module, the video serial/parallel conversion module converts the received data into audio signal contained data 12S and video component signals Y/C and respectively transmits the data 12S and the video component signals Y/C to the audio D/A conversion module and a DVI driving module, and the signals are outputted to an external audio device and a display. The DVI and audio remote transmission device is simple in structure, convenient in production and low in cost, and is suitable for wide popularization.

Description

DVI based on optical fiber adds the audio frequency long distance transmitter
Technical field
The utility model relates to a kind of DVI based on optical fiber and adds the audio frequency long distance transmitter.
Background technology
Computer output video interface mainly is two kinds of VGA and DVI, the VGA interface is the video interface that is used to export analog signal in early days, the DVI interface mainly is the digital signal video that is used to export based on the TMDS data flow, and the main flow in characteristics substitute gradually analog video interface becomes market such as digital visual interface is strong because of its signal antijamming capability, and display effect is good.
Mainly be based in early days the solution of analog video, and along with the popularizing of DVI interface, do not caught up with growth requirement based on the computer output video extender of analog video at the extender of computer output video.
The TMDS video data stream of DVI interface mainly is TMDS0 ± (Red), TMDS1 ± (Green), TMDS2 ± (Blue) and 4 pairs of differential signals of CLK ± (pixel synchronised clock), and the TMDS streaming rate reaches as high as (1Gbit * 3)/s.
Existing DVI interface computer output digital video extender adopts special-purpose DVI cable can prolong 50 meters at most, does not have the effect of real extender.If the use Optical Fiber Transmission, km needs 4 optical fiber and 4 groups of optical fiber transceiver modules though can prolong upward, and cost is higher, but also can not transmit the computer output audio.
Summary of the invention
The utility model adds the audio frequency long distance transmitter at the proposition of above problem and develop a kind of DVI based on optical fiber.The technological means that the utility model adopts is as follows:
A kind of DVI based on optical fiber adds the audio frequency long distance transmitter, it is characterized in that comprising host side and receiving terminal; Described host side comprises: video string and modular converter, DVI receiver module, optical fiber sending module, audio A/D modular converter and transmitting terminal control module; Described DVI receiver module sends in video string and the modular converter after the serial R/G/B signal that receives is changed into parallel video component signal Y/C; Described audio A/D modular converter will receive and send in video string and the modular converter after audio signal converts the I2S data to; Described video string and modular converter convert the video component signal Y/C that receives to the SDI data, simultaneously the audio signal that audio A/the D modular converter sends over are embedded in the SDI data back by giving receiving terminal by Optical Fiber Transmission behind the optical fiber sending module; Described transmitting terminal control module is connected with the optical fiber sending module with the DVI receiver module respectively;
Described receiving terminal comprises: video parallel serial conversion module, DVI driver module, optic fiber transceiver module, audio frequency D/A modular converter and receiving terminal control module; Send to the video parallel serial conversion module after the Data Receiving that described optic fiber transceiver module sends over host side, described video parallel serial conversion module will receive and send to respectively in audio frequency D/A modular converter and the DVI driver module after data transaction becomes to comprise the I2S data of audio signal and video component signal Y/C; After becoming simulated audio signal, the I2S data transaction that described audio frequency D/A modular converter will comprise audio signal exports to external audio equipment; Output Display Unit showed after described DVI driver module converted video component signal Y/C to the serial R/G/B signal of TDMS data flow; Described receiving terminal control module is connected with the DVI driver module with the optical fiber receiver module respectively.
Described host side comprises that also stereo buffer circuit is connected with audio frequency A/D modular converter, sends to audio A/D modular converter after portion's audio input signal is handled and is for further processing; Described receiving terminal comprises that also the stereo drive circuit is connected with audio frequency D/A modular converter, sends on the external audio equipment after the Audio Signal Processing that audio frequency D/A modular converter is sended over.
Owing to adopted technique scheme, the device that the utility model provides converts R, G, the B of DVI interface output to the serial sdi signal and embeds at the main frame end and gives the optical fiber sending module by analogue audio frequency behind the digital audio and video signals that AD converts and carry out long-distance transmissions; The sdi signal that the computer far-end is received optic fiber transceiver module changes into R, G, B signal and extracts the embedding audio frequency and export to display device and audiomonitor after the DA conversion.In addition,, be convenient to produce, and with low costly be suitable for extensive popularization because it is simple in structure.
Description of drawings
Fig. 1 is a main frame end structure schematic diagram in the utility model;
Fig. 2 is a computer receiving terminal structural representation in the utility model.
Among the figure: 101, video string and modular converter, 102, DVI receiver module, 103, the optical fiber sending module, 104, audio A/D modular converter, 105, transmitting terminal control module, 106, stereo buffer circuit, 201, the video parallel serial conversion module, 202, the DVI driver module, 203, optic fiber transceiver module, 204, audio frequency D/A modular converter, 205, the receiving terminal control module, 206, the stereo drive circuit.
Embodiment
The vision signal of DVI interface output is respectively serial R, G, B data and clock signal; Do long-distance transmissions and use simple optical fiber to save cost most, and sdi signal meets the requirements just.That transmit in the sdi signal is video component signal Y/C, and y/c signal can carry out color space transformation with R, G, B signal, and does not lose signal quality.In addition, also can embed digital audio and video signals in the sdi signal, promptly in the transmission sdi signal, also solve the transmission of audio signals problem.The transmission rate of SDI can reach 3Gb/s, and transmission of video resolution can reach 1920*1080P@60Hz, and the above optical fiber transceiver module of use 3G can solve the long-distance transmissions problem of SDI, and transmission range can reach several kms.Example of the present utility model is as follows:
A kind of DVI based on optical fiber adds the audio frequency long distance transmitter, comprises host side and receiving terminal; Host side comprises as shown in Figure 1: video string and modular converter 101, DVI receiver module 102, optical fiber sending module 103, audio A/D modular converter 104 and transmitting terminal control module 105; DVI receiver module 102 sends in video string and the modular converter 101 after the serial R/G/B signal that receives is changed into parallel video component signal Y/C; Audio A/D modular converter 104 will receive and send in video string and the modular converter 101 after audio signal converts the I2S data to; Video string and modular converter 101 convert the video component signal Y/C that receives to the SDI data, simultaneously the audio signal that audio A/D modular converter 104 sends over are embedded in the SDI data back by giving receiving terminal by Optical Fiber Transmission behind the optical fiber sending module 103; Transmitting terminal control module 105 is connected with optical fiber sending module 103 with DVI receiver module 102 respectively;
Receiving terminal comprises as shown in Figure 2: video parallel serial conversion module 201, DVI driver module 202, optic fiber transceiver module 203, audio frequency D/A modular converter 204 and receiving terminal control module 205; Send to video parallel serial conversion module 201 after the Data Receiving that optic fiber transceiver module 203 sends over host side, video parallel serial conversion module 201 will receive and send to respectively in audio frequency D/A modular converter 204 and the DVI driver module 202 after data transaction becomes to comprise the I2S data of audio signal and video component signal Y/C; After becoming simulated audio signal, the I2S data transaction that audio frequency D/A modular converter 204 will comprise audio signal exports to external audio equipment; Output Display Unit showed after DVI driver module 202 converted video component signal Y/C to the serial R/G/B signal of TDMS data flow; Described receiving terminal control module 205 is connected with DVI driver module 202 with optical fiber receiver module 203 respectively.
In addition, host side comprises that also stereo buffer circuit 106 is connected with audio frequency A/D modular converter 104, sends to audio A/D modular converter 104 after portion's audio input signal is handled and is for further processing; Described receiving terminal comprises that also stereo drive circuit 206 is connected with audio frequency D/A modular converter 204, sends on the external audio equipment after the Audio Signal Processing that audio frequency D/A modular converter 204 is sended over.
As mentioned above; it only is the preferable embodiment of the utility model; but protection range of the present utility model is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the utility model discloses; be equal to replacement or change according to the technical solution of the utility model and inventive concept thereof, all should be encompassed within the protection range of the present utility model.

Claims (2)

1. the DVI based on optical fiber adds the audio frequency long distance transmitter, it is characterized in that comprising host side and receiving terminal; Described host side comprises: video string and modular converter (101), DVI receiver module (102), optical fiber sending module (103), audio A/D modular converter (104) and transmitting terminal control module (105); Described DVI receiver module (102) sends in video string and the modular converter (101) after the serial R/G/B signal that receives is changed into parallel video component signal Y/C; Described audio A/D modular converter (104) will receive and send in video string and the modular converter (101) after audio signal converts the I2S data to; Described video string and modular converter (101) convert the video component signal Y/C that receives to the SDI data, simultaneously the audio signal that audio A/D modular converter (104) sends over are embedded in the SDI data back by giving receiving terminal by Optical Fiber Transmission behind the optical fiber sending module (103); Described transmitting terminal control module (105) is connected with optical fiber sending module (103) with DVI receiver module (102) respectively;
Described receiving terminal comprises: video parallel serial conversion module (201), DVI driver module (202), optic fiber transceiver module (203), audio frequency D/A modular converter (204) and receiving terminal control module (205); Send to video parallel serial conversion module (201) after the Data Receiving that described optic fiber transceiver module (203) sends over host side, described video parallel serial conversion module (201) will receive and send to respectively in audio frequency D/A modular converter (204) and the DVI driver module (202) after data transaction becomes to comprise the I2S data of audio signal and video component signal Y/C; After becoming simulated audio signal, the I2S data transaction that described audio frequency D/A modular converter (204) will comprise audio signal exports to external audio equipment; Output Display Unit showed after described DVI driver module (202) converted video component signal Y/C to the serial R/G/B signal of TDMS data flow; Described receiving terminal control module (205) is connected with DVI driver module (202) with optical fiber receiver module (203) respectively.
2. a kind of DVI based on optical fiber according to claim 1 adds the audio frequency long distance transmitter, it is characterized in that described host side comprises that also stereo buffer circuit (106) is connected with audio frequency A/D modular converter (104), send to audio A/D modular converter (104) after portion's audio input signal is handled and be for further processing; Described receiving terminal comprises that also stereo drive circuit (206) is connected with audio frequency D/A modular converter (204), sends on the external audio equipment after the Audio Signal Processing that audio frequency D/A modular converter (204) is sended over.
CN2010206311478U 2010-11-29 2010-11-29 DVI (digital visual interface) and audio remote transmission device based on optical fibers Expired - Fee Related CN201904783U (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104539364A (en) * 2014-12-31 2015-04-22 桂林铭瑶电子科技有限公司 Audio data transmitting device based on optical fibers
CN104581093A (en) * 2014-12-16 2015-04-29 河南铭视安防工程有限公司 16-channel video optical transceiver

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104581093A (en) * 2014-12-16 2015-04-29 河南铭视安防工程有限公司 16-channel video optical transceiver
CN104539364A (en) * 2014-12-31 2015-04-22 桂林铭瑶电子科技有限公司 Audio data transmitting device based on optical fibers

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Granted publication date: 20110720

Termination date: 20121129