CN202385206U - Transmission system for multichannel composite audio-video signals - Google Patents
Transmission system for multichannel composite audio-video signals Download PDFInfo
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- CN202385206U CN202385206U CN2011205465098U CN201120546509U CN202385206U CN 202385206 U CN202385206 U CN 202385206U CN 2011205465098 U CN2011205465098 U CN 2011205465098U CN 201120546509 U CN201120546509 U CN 201120546509U CN 202385206 U CN202385206 U CN 202385206U
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Abstract
The utility model relates to a transmission system for multichannel composite audio-video signals, which comprises a sending terminal and a receiving terminal, wherein the sending terminal is used for sending the multichannel composite audio-video signals, and the receiving terminal is used for receiving the multichannel composite audio-video signals. The sending terminal comprises a first receiving module, a first processor module and a first outputting module, wherein the first receiving module is used for receiving HDMI (high definition multimedia interface) audio-video signals to be sent, the first processor module is used for converting the audio-video signals sent by the first receiving module after the audio-video signals are received, and the first outputting module is used for outputting the composite audio-video signals. The receiving terminal comprises a second receiving module, a second processor module and a second outputting module, wherein the second receiving module is used for receiving SDI (serial digital interface) composite audio-video signals, the second processor module is used for converting the audio-video signals sent by the second receiving module after the audio-video signals are received, and the second outputting module is used for outputting the HDMI composite audio and video signals. By the transmission system for the multichannel composite audio-video signals, schemes of interface protocol conversion, optional multichannel switching, multipoint receiving and cascaded terminal receiving equipment are achieved, and high definition with no compression and long-distance transmission of third-generation audio-video signals can be realized.
Description
Technical field
The present invention relates to a kind of transmission system of AV signal, relating in particular to a kind of is the multichannel composite audio transmission of video signals system that sdi signal transmits with the HDMI conversion of signals.
Background technology
The AV signal transmission is divided into analog signal transmission and digital data transmission, and analog signal transmission has following shortcoming: 1 transmission system is complicated, 2 poor anti jamming capability, and 3 can't realize that multiple spot sends multiple spot and receives.Prior art adopts the digital signal of digital signal to carry out the AV signal transmission more; Common mode has: DVI (Digital Video Interface digital visual interface), internet transmission, HDMI, DP (DISPLAY PORT is called for short " DP ") interface.DVI wherein, HDMI, DISPLAY PORT are point-to-point direct transmission, and transmission range is short, and simultaneously, DVI can not transmitting audio signal; The internet transmission has time-delay, need compress as transmitting high-definition video signal, and image detail has loss.
Summary of the invention
The technical problem that the present invention solves is: make up a kind of multichannel composite audio transmission of video signals method and system, overcome the technical problem of prior art transmission range weak point and signal transmission distortion.
Technical scheme of the present invention is: make up a kind of multichannel composite audio transmission of video signals system; Comprise that transmitting terminal that sends multichannel composite audio vision signal and the receiving terminal that receives multichannel composite audio vision signal, said transmitting terminal comprise that first receiver module that receives HDMI AV signal to be sent, the AV signal that said first receiver module reception back is sent carry out the first processor module of signal conversion processes, first output module of output composite audio vision signal; Said receiving terminal comprises second receiver module that receives SDI composite audio vision signal, and the AV signal that said second receiver module is received the back transmission carries out second processor module of conversion process, second output module of output HDMI composite audio vision signal; Said first receiver module receives multichannel composite audio vision signal, and every road composite audio vision signal is parsed audio signal and vision signal, sends with the LVTTL level then; The audio signal that said first processor module is separated every road is inserted in the corresponding video signals, adds audio sync code data bag, generates the composite audio vision signal of SDI standard; Said first output module is exported the composite audio vision signal of SDI standard with serial signal; Said second receiver module receives the composite audio vision signal of the SDI standard of serial; Said second processor module converts the composite audio vision signal of SDI standard to the multi-path parallel signal of HDMI form; Said second output module is with the multi-path parallel signal output composite audio vision signal of HDMI form.
Further technical scheme of the present invention is: said first processor module comprises that the multichannel that multichannel composite audio vision signal is selected to switch switches multiplex circuit.
Further technical scheme of the present invention is: said transmitting terminal comprises with electrical signal conversion being the electrooptic conversion module of light signal; Said receiving terminal comprises the photoelectric conversion module that light signal is converted into the signal of telecommunication, and said transmitting terminal and said receiving terminal pass through optical fiber transmission signal.
Further technical scheme of the present invention is: said first processor module comprises the scrambling module that signal is carried out scrambling, and said second processor comprises the descrambling module that signal is carried out descrambling.
Further technical scheme of the present invention is: said transmission system also comprises the host computer that carries out the interface switching controls.
Further technical scheme of the present invention is: said transmission system comprises that also USB interface changes the USB interface change-over circuit of UART interface.
Further technical scheme of the present invention is: said transmission system also comprises configuration and monitors the I2C interface circuit of said first receiver module and second receiver module.
Technique effect of the present invention is: a kind of multichannel composite audio of the present invention transmission of video signals system, the multichannel composite audio vision signal of HDMI form is passed through conversion process, and convert SDI composite audio vision signal to, transmit then.A kind of multichannel composite audio of the present invention transmission of video signals method and system have realized the scheme that interface protocol conversion, multichannel are switched arbitrarily, multiple spot receives, and can realize no compressed high definition and the long Distance Transmission of 3G audio-video signal.
Description of drawings
Fig. 1 is a flow chart of the present invention.
Fig. 2 is a structural representation of the present invention.
Fig. 3 is the structural representation of transmitting terminal of the present invention.
Fig. 4 is a first processor modular structure sketch map of the present invention.
Fig. 5 is the structural representation of receiving terminal of the present invention.
Fig. 6 is the present invention's second processor module structural representation.
Embodiment
Below in conjunction with specific embodiment, technical scheme of the present invention is further specified.
As shown in Figure 1, embodiment of the present invention is: a kind of multichannel composite audio transmission of video signals method is provided, comprises the steps:
Step 100: receive and resolve the composite audio vision signal, that is: receive multichannel HDMI composite audio vision signal, every road composite audio vision signal is parsed audio signal and vision signal, send with the LVTTL level then.The practical implementation process is following: receive the multichannel HDMI composite audio vision signal that meets electrical code; Parse audio-video signal; Send with the LVTTL level, in the specific embodiment, said multichannel HDMI composite audio vision signal meets minimum transfer electrical difference signal standard.
Step 200: generate the composite audio vision signal, that is: the audio signal of every road being separated is inserted in the corresponding video signals, adds audio sync code data bag, generates SDI composite audio vision signal.The practical implementation process is following: at first; Receive the audio signal and the vision signal of the next parsing of said first receiver module transmission; The form of identification video signal, the audio signal of then every road being separated is inserted in the corresponding video signals and is obtained compound AV signal, in compound AV signal, inserts audio sync code data bag; To signal scrambling; Convert the complex tone vision signal of LVTTL electrical code to meet serial digital signal transmission application-specific integrated circuit (ASIC) and require 4:1LVDS (Low-Voltage Differential Signaling, Low Voltage Differential Signal are called for short " LVDS ") level signal output.For the SD vision signal, after audio signal is inserted corresponding video signals, also to insert the SMPTE352 packet.In the specific embodiment,, vision signal also to insert the EDH packet if being the SD signal.
Step 300: output SDI composite audio vision signal, that is: SDI composite audio vision signal is exported with one road serial signal.In the specific embodiment, in output SDI composite audio vision signal step, with Low Voltage Differential Signal output SDI composite audio vision signal.Also comprise and convert SDI composite audio vision signal into light signal through optical fiber output.
Step 400: receive the composite audio vision signal, that is: receive and encircle out simultaneously the SDI composite audio vision signal of serial, receive and encircle out the signal that is about to receive simultaneously and export again, in order to realize the receiving terminal cascade.In the specific embodiment, receive and encircle out serial complex tone vision signal simultaneously, the SDI composite audio vision signal of serial is issued second processor module with the 4:1LVDS level signal, simultaneously the signal of receiving is sent to realize the receiving terminal cascade.In the specific embodiment, also comprise converting light signal into the signal of telecommunication, receive conversion back SDI composite audio vision signal then.
Step 500: change the composite audio vision signal, that is: SDI composite audio vision signal is converted to the multi-path parallel signal of HDMI form.The practical implementation process is following: convert SDI composite audio vision signal to parallel signal, to the signal descrambling; To video signal format scanning, the video signal format that obtains importing, whether the inspection signal is wrong; If be input as the SD signal then extract its EDH packet; Inspection is also extracted the SMPTE352 packet in the signal, and search is extracted packets of audio data and sent according to the I2S bus protocol.
Step 600: output HDMI composite audio vision signal: with the multi-path parallel signal output composite audio vision signal of HDMI form.
As shown in Figure 2; Embodiment of the present invention is: make up a kind of multichannel composite audio transmission of video signals system; Comprise that transmitting terminal 1 that sends multichannel composite audio vision signal and the receiving terminal 2 that receives multichannel composite audio vision signal, said transmitting terminal comprise first receiver module 11 that receives HDMI AV signal to be sent, said first receiver module 11 is received the first processor module 12 that the AV signal that sends the back carries out signal conversion processes, first output module 13 of output composite audio vision signal; Said receiving terminal 2 comprises second receiver module 21 that receives SDI composite audio vision signal, and said second receiver module 21 is received second processor module 22 that the AV signal that sends the back carries out conversion process, second output module 23 of output HDMI composite audio vision signal; Said first receiver module 11 receives multichannel composite audio vision signal, and every road composite audio vision signal is parsed audio signal and vision signal, sends with the LVTTL level then; The audio signal that said first processor module 12 is separated every road is inserted in the corresponding video signals, adds audio sync code data bag, generates SDI composite audio vision signal; Said first output module 13 is exported SDI composite audio vision signal with serial signal; Said second receiver module 21 receives the SDI composite audio vision signal of serial; Said second processor module 22 converts SDI composite audio vision signal to the multi-path parallel signal of HDMI form; Said second output module 23 is with the multi-path parallel signal output composite audio vision signal of HDMI form.In the specific embodiment, the said first processor module 12 and second processor module 22 include field programmable gate array.
As shown in Figure 3; The practical implementation process of transmitting terminal 1 of the present invention is following: said first receiver module 11 receives the multichannel HDMI composite audio vision signal that meets electrical code; Parse audio-video signal; Send with the LVTTL level, in the specific embodiment, said multichannel HDMI composite audio vision signal meets the transition minimized differential signaling electrical code.As shown in Figure 4; Said first processor module 12 practical implementation processes are following: at first; Receive the audio signal and the vision signal of the next parsing of said first receiver module transmission; The form of identification video signal, the audio signal of then every road being separated is inserted in the corresponding video signals and is obtained compound AV signal, in compound AV signal, inserts audio sync code data bag; To signal scrambling, the complex tone vision signal of LVTTL electrical code converted to meet serial digital signal and send the 4:1LVDS level signal output that application-specific integrated circuit (ASIC) requires.For the SD vision signal, after with audio signal and SMPTE352 packet insertion corresponding video signals, also to insert the EDH bag.In the specific embodiment, said first processor module 12 comprises that the multichannel that multichannel composite audio vision signal is selected to switch switches multiplex circuit.Said first output module 13 is exported SDI composite audio vision signal with one road serial signal.In the specific embodiment, in output SDI composite audio vision signal step, with Low Voltage Differential Signal output SDI composite audio vision signal.Also comprise and convert SDI composite audio vision signal into light signal through optical fiber output.
As shown in Figure 5, the practical implementation process of receiving terminal 1 of the present invention is following: said second receiver module 21 receives and encircles out the SDI composite audio vision signal of serial.In the specific embodiment; Said second receiver module 21 receives serial complex tone vision signal; Issue second processor module with the 4:1LVDS level signal, simultaneously the signal of receiving is sent to realize the receiving terminal cascade, said second receiver module 21 receives application-specific integrated circuit (ASIC) for SDI.In the specific embodiment, also comprise converting light signal into the signal of telecommunication, receive conversion back SDI composite audio vision signal then.As shown in Figure 6, said second processor module 22 converts SDI composite audio vision signal to the multi-path parallel signal of HDMI form.The practical implementation process is following: convert SDI composite audio vision signal to parallel signal, to the signal descrambling; To video signal format scanning, the video signal format that obtains importing, whether the inspection signal is wrong; If be input as the SD signal then extract its EDH packet; Inspection is also extracted the SMPTE352 packet in the signal, and search is extracted packets of audio data and sent according to the I2S bus protocol.Said second output module 23 is with the multi-path parallel signal output composite audio vision signal of HDMI form, and said second output module 23 sends application-specific integrated circuit (ASIC) for HDMI.
Preferred implementation of the present invention is: said transmitting terminal 1 comprises with electrical signal conversion being the electrooptic conversion module 14 of light signal; Said receiving terminal 2 comprises the photoelectric conversion module 24 that light signal is converted into the signal of telecommunication, and said transmitting terminal 1 passes through optical fiber transmission signal with said receiving terminal 2.After the present invention sets up sdi signal with the HDMI conversion of signals, can adopt length to carry out the signal transmission apart from means.Said first processor module 12 comprises the scrambling module (not shown) of signal being carried out scrambling, and said second processor 22 comprises the descrambling module (not shown) of signal being carried out descrambling.
Technique effect of the present invention is: a kind of multichannel composite audio of the present invention transmission of video signals method and system, the multichannel composite audio vision signal of HDMI form is passed through conversion process, and convert SDI composite audio vision signal to, transmit then.A kind of multichannel composite audio of the present invention transmission of video signals method and system have realized the scheme that interface protocol conversion, multichannel are switched arbitrarily, multiple spot receives, and can realize no compressed high definition and the long Distance Transmission of 3G audio-video signal.
Above content is to combine concrete preferred implementation to the further explain that the present invention did, and can not assert that practical implementation of the present invention is confined to these explanations.For the those of ordinary skill of technical field under the present invention, under the prerequisite that does not break away from the present invention's design, can also make some simple deduction or replace, all should be regarded as belonging to protection scope of the present invention.
Claims (7)
1. multichannel composite audio transmission of video signals system; It is characterized in that; Comprise that transmitting terminal that sends multichannel composite audio vision signal and the receiving terminal that receives multichannel composite audio vision signal, said transmitting terminal comprise that first receiver module that receives HDMI AV signal to be sent, the AV signal that said first receiver module reception back is sent carry out the first processor module of signal conversion processes, first output module of output composite audio vision signal; Said receiving terminal comprises second receiver module that receives SDI composite audio vision signal, and the AV signal that said second receiver module is received the back transmission carries out second processor module of conversion process, second output module of output HDMI composite audio vision signal; Said first receiver module receives multichannel composite audio vision signal, and every road composite audio vision signal is parsed audio signal and vision signal, sends with the LVTTL level then; The audio signal that said first processor module is separated every road is inserted in the corresponding video signals, adds audio sync code data bag, generates the composite audio vision signal of SDI standard; Said first output module is exported the composite audio vision signal of SDI standard with serial signal; Said second receiver module receives the composite audio vision signal of the SDI standard of serial; Said second processor module converts the composite audio vision signal of SDI standard to the multi-path parallel signal of HDMI form; Said second output module is with the multi-path parallel signal output composite audio vision signal of HDMI form.
2. multichannel composite audio transmission of video signals according to claim 1 system is characterized in that, said first processor module comprises that the multichannel that multichannel composite audio vision signal is selected to switch switches multiplex circuit.
3. multichannel composite audio transmission of video signals according to claim 1 system; It is characterized in that; Said transmitting terminal comprises with electrical signal conversion being the electrooptic conversion module of light signal; Said receiving terminal comprises the photoelectric conversion module that light signal is converted into the signal of telecommunication, and said transmitting terminal and said receiving terminal pass through optical fiber transmission signal.
4. multichannel composite audio transmission of video signals according to claim 1 system is characterized in that said first processor module comprises the scrambling module that signal is carried out scrambling, and said second processor comprises the descrambling module that signal is carried out descrambling.
5. multichannel composite audio transmission of video signals according to claim 1 system is characterized in that said transmission system also comprises the host computer that carries out the interface switching controls.
6. multichannel composite audio transmission of video signals according to claim 1 system is characterized in that, said transmission system comprises that also USB interface changes the USB interface change-over circuit of UART interface.
7. multichannel composite audio transmission of video signals according to claim 1 system is characterized in that, said transmission system also comprises configuration and monitors the I2C interface circuit of said first receiver module and second receiver module.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011205465098U CN202385206U (en) | 2011-12-23 | 2011-12-23 | Transmission system for multichannel composite audio-video signals |
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| CN2011205465098U CN202385206U (en) | 2011-12-23 | 2011-12-23 | Transmission system for multichannel composite audio-video signals |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102447909A (en) * | 2011-12-23 | 2012-05-09 | 深圳市巨潮科技有限公司 | Method and system for transmitting multi-path composite audio-video signals |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102447909A (en) * | 2011-12-23 | 2012-05-09 | 深圳市巨潮科技有限公司 | Method and system for transmitting multi-path composite audio-video signals |
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| C14 | Grant of patent or utility model | ||
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| C56 | Change in the name or address of the patentee |
Owner name: SHENZHEN BIGTIDE TECHNOLOGY CO., LTD. Free format text: FORMER NAME: SHENZHEN JUCHAO TECHNOLOGY CO., LTD. |
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| CP03 | Change of name, title or address |
Address after: 518000 Guangdong Province, Shenzhen New District of Longhua City, Huarong Road No. 397 Fu Long Industrial Zone 8 Patentee after: SHENZHEN BIGTIDE TECHNOLOGY CO., LTD. Address before: 518055 Guangdong city of Shenzhen province Nanshan District Xili Pingshan Road, Da Yuan Industrial Zone 10 Patentee before: Shenzhen Juchao Technology Co., Ltd. |
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Address after: 518000 517, building 7, Hengda fashion Huigu building (East District), Fulong Road, Tongsheng community, Dalang street, Longhua District, Shenzhen City, Guangdong Province Patentee after: SHENZHEN BIGTIDE TECHNOLOGY Co.,Ltd. Address before: Building 8, longfu Industrial Zone, 397 Huarong Road, Longhua New District, Shenzhen, Guangdong 518000 Patentee before: SHENZHEN BIGTIDE TECHNOLOGY Co.,Ltd. |
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Granted publication date: 20120815 |