CN2800670Y - External device for realizing UXGA signal input-output - Google Patents
External device for realizing UXGA signal input-output Download PDFInfo
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- CN2800670Y CN2800670Y CN 200520109984 CN200520109984U CN2800670Y CN 2800670 Y CN2800670 Y CN 2800670Y CN 200520109984 CN200520109984 CN 200520109984 CN 200520109984 U CN200520109984 U CN 200520109984U CN 2800670 Y CN2800670 Y CN 2800670Y
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Abstract
The utility model belongs to the field of the multimedia communication and is particularly relates to device which can realize the signal input and output of UXGA and the real-time communication. The utility model comprises an A/D, D/A converting unit, a data buffer storage unit, and a compression and decompression processing unit, datum can be transferred to a conference television terminal through an ethernet interface and the conference television terminal can transfer the compressed datum to other conference television terminals through a communication network interface. The utility model simultaneously support multipath microphone input and wiring audio input and output, the audio output of a PC can be connected in, after the A/D digital conversion is carried out, and video datum are directly transferred to the conference television terminal through the ethernet interface together; thus, the microphone input of the conference television terminal can be enlarged, the requirement of the real-time communication of VGA-UXGA signals can be realized, and the synchronous transmission of the display content and the play audio of the PC can be also be realized.
Description
Technical field
The utility model belongs to field of multimedia communication, be specifically related to a kind of external, can realize the input and output of UXGA signal, but and the device of real time communication.
The utility model is applied to that the UXGA analog signal conversion become digital signal and realizes the occasion of signal long-distance transmissions, especially is suitable in TV conference system, realizes the device of UXGA signal input and output.
Background technology
Along with the continuous development of media compression and transmission technology, and communication network is perfect day by day, and multimedia communication enters into our daily life gradually.
People only no longer have been satisfied with and have realized simple video voice communication by network, more wish can realize when the video voice are linked up the interchange of high-resolution character and graphic.
For example: hope can realize the VGA～UXGA output signal of PC high-resolution and refresh rate, and this has just facilitated the demand of VGA～UXGA signal long-distance transmissions, and especially the real time communication demand of video conference terminal VGA～UXGA signal is arisen at the historic moment.
VGA～UXGA signal directly causes the difference of pixel rate along with the difference of resolution, refresh rate etc., and the partial reference data see Table one.
| Standard | Resolution | Refresh rate (Hz) | Line frequency (kHz) | Pixel rate (MHz) |
| VGA | 640×480 | 60 | 31.5 | 25.175 |
| 72 | 37.7 | 31.500 | ||
| 75 | 37.5 | 31.500 | ||
| 85 | 43.3 | 36.000 | ||
| SVGA | 800×600 | 56 | 35.1 | 36.000 |
| 60 | 37.9 | 40.000 | ||
| 72 | 48.1 | 50.000 | ||
| 75 | 46.9 | 49.500 | ||
| 85 | 53.7 | 56.250 |
| XGA | 1024×768 | 60 | 48.4 | 65.000 |
| 70 | 56.5 | 75.000 | ||
| 75 | 60.0 | 78.750 | ||
| 80 | 64.0 | 85.500 | ||
| 85 | 68.3 | 94.500 | ||
| SXGA | 1280×1024 | 60 | 64.0 | 108.000 |
| 75 | 80.0 | 135.000 | ||
| UXGA | 1600×1200 | 60 | 75.0 | 162.000 |
Table one
Can see that from table one pixel rate of UXGA will be input to video conference terminal with this signal and communicate up to 162.000MHz, at first will carry out the A/D conversion, R, G, B three road signals adopt the 8bit sampling respectively, and data transfer rate will be up to 162MB/s.How handling the data of high speed like this, is very crucial concerning system.
In addition, the direct transmission range of VGA～UXGA analog signal is very short, if therefore directly be connected with terminal, VGA～UXGA signal source must be leaned on closerly with terminal, but in the middle of the application of TV conference system, VGA～UXGA signal source (as: participant's PC etc.) is general and larger distance is arranged between the terminal of TV conference system, directly connects and uses very inconvenience.Therefore realize that the long-distance transmissions of VGA～UXGA signal is extremely important.
Existing P C machine by the digital translation of software mode realization UXGA signal, takies the ample resources of PC, and real-time is poor, is difficult to practical requirement.
On the other hand, the terminal of TV conference system needs microphone input and voice band line input and output, connecting line between conference table and the video conference terminal is very many like this, if the microphone input directly can be connected with video conference terminal with audio frequency input and output connecting line, but directly be connected with external device, connecting line with video conference terminal will reduce much so, makes the meeting room wiring succinctly not in disorder, easy to use.
The utility model content
The purpose of this utility model is the demand at present VGA～UXGA signal long-distance transmissions, especially the demand of VGA in the TV conference system～UXGA signal real time communication, the device of provide a kind of convenient use, can be external, realizing VGA～UXGA signal input and output, simultaneously, the utility model also provides microphone input expansion and circuit audio frequency input and output expansion.
The utility model specifically is achieved in that
The device of a kind of external realization UXGA signal input and output, this device obtains the VGA～UXGA analog signal of external display device input, and to local video conference terminal, outputting VGA～UXGA compression digital signal is characterized in that also comprising:
The A/D converting unit is carried out A/D conversion, the data input-buffer unit that obtains to described analog signal;
Buffer unit carries out buffer memory to the A/D data converted, and according to the size of A/D conversion back data volume, assurance resolution is not lost, and reduces refreshing frequency, with suitable speed input processor unit;
Processor unit, the one, the data of input are carried out compressed encoding handle, and send video conference terminal by Ethernet interface, the 2nd, the data of input are decompressed after the encoding process input D/A converting unit;
The D/A converting unit is carried out the D/A conversion to the data behind the coding that decompresses, and the data that obtain output to external display device.
Also comprise Ethernet interface, link to each other with local video conference terminal with processor unit respectively;
Described analog signal through the data that A/D conversion, compression are handled, is delivered to local video conference terminal by Ethernet interface;
Described compression digital signal by the transmission of Ethernet interface, through the data of decompression, D/A conversion process, is delivered to external display device again.
Also comprise audio frequency CODEC unit, link to each other with external display device with processor unit respectively, be used for the A/D conversion to simulated audio signal, the D/A conversion of compressed audio digital signal;
Described simulated audio signal through the data that audio frequency CODEC unit A/D conversion, processor unit compression are handled, is delivered to local video conference terminal by Ethernet interface;
Described compressed audio digital signal, by the transmission of Ethernet interface, through processor unit decompression, audio frequency CODEC cells D/A conversion process, the circuit audio signal of output simulation is to output peripheral equipment.
Described video conference terminal will be received through audio frequency CODEC unit A/D conversion, the data of processor unit compression processing and the audio digital signals of this video conference terminal and carry out audio mixing, encoding process, deliver to other far-end video conference terminal by communication network.
Described A/D converting unit realizes the A/D conversion by the high-speed a/d change-over circuit.
Described high-speed a/d change-over circuit adopts three road discrete A/D change-over circuits or three road integrated A/D change-over circuits to realize.
Described D/A converting unit realizes the D/A conversion by the high-speed d/a change-over circuit.
Described high-speed d/a change-over circuit adopts three road discrete D/A change-over circuits or three road integrated D/A change-over circuits to realize.
Described caching process unit adopts the method for the plug-in SDRAM of FPGA to realize;
Described FPGA obtains data, is cached in SDRAM, and FPGA according to circumstances carries out the data transfer rate adjustment, determines the output of speed according to refresh rate.
Described processor unit adopts high-speed dsp digital signal processor or multimedia processor to realize.
Described Ethernet interface can adopt the wired ethernet interface circuit to realize, also can adopt the wireless ethernet interface circuit to realize.
The utlity model has following advantage:
1, adopts external mode, solved the restriction that VGA～UXGA signal source can only closely be connected with video conference terminal.
2, adopt the metadata cache technology, support input and output up to the UXGA pixel rate of 162.000MHz.
3, by Ethernet interface, be connected with miscellaneous equipment (as video conference terminal) on the network in wireless or wired mode, have versatility widely.
4, adopt video compression technology, VGA～UXGA signal is reduced greatly through the data bit rate of input/output unit to the meeting television terminal, alleviated the burden of video conference terminal video compression simultaneously.
5, voice data is connected with video conference terminal with digital signal rather than analog signal, is transferred to coding transmission behind the voice data audio mixing of video conference terminal and terminal itself through Ethernet interface, has effectively expanded the input and output of audio frequency.
6, have only a cable or be connected with video conference terminal with wireless mode, can reduce the audio connecting cord of looking of video conference terminal, wiring is succinct.
Description of drawings
Fig. 1 is the connection block diagram between external VGA described in the utility model～UXGA signal input/output unit and the video conference terminal.
Fig. 2 is the functional block diagram of external VGA described in the utility model～UXGA signal input/output unit.
Embodiment
The device of the described external realization VGA～UXGA signal input and output of the utility model:
Adopt the high-speed a/d change-over circuit that R, G, B three road signals of VGA～UXGA are carried out the A/D conversion simultaneously, and the data that obtain are compressed processing, give video conference terminal with the data of compression by Ethernet interface then, video conference terminal is sent to the data of compression other video conference terminal by communication network.
Simultaneously, VGA～UXGA packed data that other video conference terminal is sent, transmit by Ethernet interface again, data to compression are decoded, and give the high-speed d/a change-over circuit with decoded data, R, G, B signal after the D/A conversion can output to monitor and show, so just can realize the demand of VGA～UXGA signal real time communication.
The utility model is supported input of multichannel microphone and the input and output of circuit audio frequency simultaneously, the audio frequency output of PC can be inserted, after the A/D digital translation, directly be sent to video conference terminal together with video data through Ethernet interface, like this, except microphone input expansion, can also realize the synchronous transmission of PC displaying contents and audio plays to video conference terminal.
Below in conjunction with accompanying drawing the utility model is done to describe in further detail, illustration is applied as example with TV conference system:
Fig. 1 is the connection block diagram between external VGA～UXGA signal input/output unit and the video conference terminal.As shown in the figure, the described VGA of the utility model～UXGA signal input/output unit is placed on video conference terminal equipment, supports VGA～UXGA signal input, VGA～UXGA signal output, microphone input, the input of circuit audio frequency, the output of circuit audio frequency, Ethernet interface.Connect by Ethernet interface between the utility model device and the video conference terminal.
Fig. 2 is the functional block diagram of external VGA～UXGA signal input/output unit.Function realizes being described below:
201 three road high-speed a/d converting units are carried out the A/D conversion simultaneously with RGB three tunnel analog signals of VGA～UXGA of input, and the digital rgb signal that obtains after the conversion is input to 203 buffer units.
(UXGA, 60Hz), if directly deliver to 205 processor units, the data-interface rate requirement to 205 processor units is very high so, realizes that difficulty is very big up to 162MB/s from 201 data of obtaining for 203 buffer units.203 buffer units in the utility model device can A/D data after the conversion carry out buffer memory, and according to the size of A/D conversion back data volume, guaranteeing under the situation that resolution is not lost, reduce refreshing frequency, output to 205 processor units with suitable speed, so just can guarantee the support of the various resolution from VGA to UXGA.
205 processor units are the data processing centres of installing in the utility model, carry out compressed encoding after obtaining data from 203, by 206 Ethernet interfaces, send to local video conference terminal then.
Ethernet interface 206 in the utility model device can be wired ethernet interface or wireless ethernet interface.Local video conference terminal sends to other video conference terminal by communication network with video data.
Local video conference terminal receives the VGA～UXGA video data of compression from other video conference terminal by communication network, deliver to 205 processor units by 206 Ethernet interfaces, 205 processor units carry out decompression to data, then decoded data are sent to 202 three road D/A converting units.
202 three road high-speed d/a converting units are carried out the D/A conversion respectively to three way word rgb signals, and the VGA～UXGA signal of output simulation shows.
Microphone signal and circuit audio signal are input to 204 audio frequency CODEC unit, 204 audio frequency CODEC unit carry out the A/D conversion to the analog microphone signal and the circuit audio signal of input, and the digital signal that A/D is converted to delivered to 205 processor units, 205 processor units carry out after the data processing, by 206 Ethernet interfaces, send to local video conference terminal.Local video conference terminal sends to other video conference terminal by communication network with voice data with after the digital audio-frequency data received and local digital voice data audio mixing, the encoding process.
Local video conference terminal receives the digital audio-frequency data of compression from other video conference terminal by communication network, deliver to 205 processor units by 206 Ethernet interfaces, 205 processor units carry out relevant treatment to data, then decoded voice data is sent to 204 audio frequency CODEC unit, 204 audio frequency CODEC unit carry out the D/A conversion to digital audio and video signals, the circuit audio signal of output simulation.
The embodiment explanation, 201 high-speed a/d converting units can adopt three road discrete A/D change-over circuits to realize, also can adopt three road integrated A/D change-over circuits to realize, 202 high-speed d/a converting units can adopt three road discrete D/A change-over circuits to realize, also can adopt three road integrated D/A change-over circuits to realize.203 buffer units can adopt the method for the plug-in SDRAM of FPGA to realize, FPGA obtains data from 201, is cached in SDRAM, and FPGA according to circumstances carries out the data transfer rate adjustment simultaneously, outputs to 205 processor units with suitable speed.205 processor units can adopt high-speed dsp digital signal processor or multimedia processor to realize, according to the ability of processor, can realize H.263, H.264 wait various coding and decoding video algorithms and G.722, G.728 wait various audio code decode algorithms.204 audio frequency CODEC unit can adopt discrete audio A/D, D/A circuit to realize, also can adopt the integrated CODEC circuit of audio A/D, D/A to realize.206 Ethernet interfaces can adopt the wired ethernet interface circuit to realize, also can adopt the wireless ethernet interface circuit to realize.
Claims (10)
1, the device of a kind of external realization UXGA signal input and output, this device obtains the outside VGA～UXGA analog signal that shows input, and to local video conference terminal, outputting VGA～UXGA compression digital signal is characterized in that also comprising:
The A/D converting unit is carried out A/D conversion, the data input-buffer unit that obtains to described analog signal;
Buffer unit carries out buffer memory to the A/D data converted, according to the size of A/D conversion back data volume, with suitable speed input processor unit;
Processor unit, the one, the data of input are carried out compressed encoding handle, and send video conference terminal by Ethernet interface, the 2nd, the data of input are decompressed after the encoding process input D/A converting unit;
The D/A converting unit is carried out the D/A conversion to the data behind the coding that decompresses, and the data that obtain output to external display device;
Ethernet interface links to each other with local video conference terminal with processor unit respectively;
Described analog signal through the data that A/D conversion, compression are handled, is delivered to local video conference terminal by Ethernet interface;
Described compression digital signal by the transmission of Ethernet interface, through the data of decompression, D/A conversion process, is delivered to external display device again.
2, the device of external according to claim 1 realization UXGA signal input and output is characterized in that also comprising:
Audio frequency CODEC unit links to each other with signal source with processor unit respectively, is used for the A/D conversion to simulated audio signal, the D/A conversion of compressed audio digital signal;
Described simulated audio signal through the data that audio frequency CODEC unit A/D conversion, processor unit compression are handled, is delivered to video conference terminal by Ethernet interface;
Described compressed audio digital signal, by the transmission of Ethernet interface, through processor unit decompression, audio frequency CODEC cells D/A conversion process, the circuit audio signal of output simulation is to output peripheral equipment.
3, as the device of external realization UXGA signal input and output as described in the claim 2, it is characterized in that:
Described video conference terminal will be received through audio frequency CODEC unit A/D conversion, the data of processor unit compression processing and the audio digital signals of this video conference terminal and carry out audio mixing, encoding process, deliver to other far-end video conference terminal by communication network.
4, the device of external according to claim 1 realization UXGA signal input and output is characterized in that:
Described A/D converting unit realizes the A/D conversion by the high-speed a/d change-over circuit.
5, as the device of external realization UXGA signal input and output as described in the claim 4, it is characterized in that:
Described high-speed a/d change-over circuit adopts three road discrete A/D change-over circuits or three road integrated A/D change-over circuits to realize.
6, the device of external according to claim 1 realization UXGA signal input and output is characterized in that:
Described D/A converting unit realizes the D/A conversion by the high-speed d/a change-over circuit.
7, as the device of external realization UXGA signal input and output as described in the claim 6, it is characterized in that:
Described high-speed d/a change-over circuit adopts three road discrete D/A change-over circuits or three road integrated D/A change-over circuits to realize.
8, the device of external according to claim 1 realization UXGA signal input and output is characterized in that:
Described caching process unit adopts the method for the plug-in SDRAM of FPGA to realize;
Described FPGA obtains data, is cached in SDRAM, and FPGA according to circumstances carries out the data transfer rate adjustment, exports according to the speed that refresh rate is determined.
9, the device of external according to claim 1 realization UXGA signal input and output is characterized in that:
Described processor unit adopts high-speed dsp digital signal processor or multimedia processor to realize.
10, the device of external according to claim 1 realization UXGA signal input and output is characterized in that:
Described Ethernet interface can adopt the wired ethernet interface circuit to realize, also can adopt the wireless ethernet interface circuit to realize.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520109984 CN2800670Y (en) | 2005-06-21 | 2005-06-21 | External device for realizing UXGA signal input-output |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200520109984 CN2800670Y (en) | 2005-06-21 | 2005-06-21 | External device for realizing UXGA signal input-output |
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| CN2800670Y true CN2800670Y (en) | 2006-07-26 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101141615B (en) * | 2007-10-16 | 2010-07-14 | 中兴通讯股份有限公司 | External implementing method of session television terminal supporting double currents |
| CN104917998A (en) * | 2014-03-10 | 2015-09-16 | 中兴通讯股份有限公司 | Wireless microphone, video conference systems and operation method thereof |
-
2005
- 2005-06-21 CN CN 200520109984 patent/CN2800670Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101141615B (en) * | 2007-10-16 | 2010-07-14 | 中兴通讯股份有限公司 | External implementing method of session television terminal supporting double currents |
| CN104917998A (en) * | 2014-03-10 | 2015-09-16 | 中兴通讯股份有限公司 | Wireless microphone, video conference systems and operation method thereof |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20150621 Granted publication date: 20060726 |