CN102186074A - Video signal wireless transmission device - Google Patents
Video signal wireless transmission device Download PDFInfo
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- CN102186074A CN102186074A CN 201110108159 CN201110108159A CN102186074A CN 102186074 A CN102186074 A CN 102186074A CN 201110108159 CN201110108159 CN 201110108159 CN 201110108159 A CN201110108159 A CN 201110108159A CN 102186074 A CN102186074 A CN 102186074A
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Abstract
The invention discloses a video signal wireless transmission device, which comprises a video processing transmitter and a receiving converter, wherein the video processing transmitter comprises a video conversion module, an A/D conversion decoding module, a first video processor and an ultra wideband (UWB) transmission unit; and the receiving converter comprises a UWB receiving unit, a second video processor and a D/A conversion coding module. The video signal wireless transmission device is free from the constraint of data transmission wires, improves a using environment and makes electrical appliances simpler and easier to arrange.
Description
Technical field:
The present invention relates to a kind of vision signal radio transmitting device.
Background technology:
Wireless technology has been widely used in household electrical appliance, for example Wireless Keyboard, wireless mouse etc. at present.These peripheral hardwares use wireless technology can make the assembling of household electrical appliance convenient more, also make its maintenance more easy.
Though wireless technology is seen everywhere, aspect video transmission, but there is not good solution.Along with improving constantly of people's living standard, people need some complete functions and electrical equipment easily, for example wireless camera or with wireless penetrations such as display and projecting apparatus.Traditional scheme is the solution by wired method, and still, the connection of various cables often makes operation and maintenance not too convenient, therefore needs a kind of new vision signal Radio Transmission Technology.
Summary of the invention:
Purpose of the present invention just provides a kind of wireless video signal transmission device, makes the user break away from the constraint of data transmission cable, has improved environment for use, makes that the installation of electrical equipment is simpler and easy, occupation mode is more flexible.
A kind of vision signal radio transmitting device comprises the Video processing transmitting terminal and accepts end of convert, and wherein, the Video processing transmitting terminal comprises:
Video conversion module, receiving video signals, the line frequency and the field frequency of extraction vision signal by the read-write sequence of the memory in the control module, are converted to the signal that meets the NSTC/PAL system with vision signal, and are transferred to A/D transforms decode module;
A/D transforms decode module, the signal that receives is carried out analog-to-digital conversion, again digitized signal is carried out separating of brightness and colourity, and it is handled, decode simultaneously and some corresponding processing and conversion, comprise bright signal handled after, bright signal is converted into the YCbCr component signal, as decoding output control, export digital yuv data simultaneously with the synchronizing signal decoding, and with it at last; And the digital signal after will handling is exported to first video processor;
First video processor, provide clock signal to each module, realization is to the selection configuration of input pattern, handle to the received signal and store, after this was treated to video data and is input to first video processor, the yuv data that the video input processing unit (VIP) in the processor will meet separated, and can handle accordingly according to application, be stored at last in the internal memory, store data can be exported to the UWB transmitter unit here;
The UWB transmitter unit is packed signal, and is transferred to the UWB receiving element;
Accepting end of convert comprises:
The UWB receiving element unpacks and is transferred to second video processor with the data that receive;
Second video processor, D/A transform coding module is configured, (second video processor can store the video data that receives in the internal memory into to handle the signal that receives, the high-quality video output unit of processor extracts the yuv data that separates and is converted into standard compliant data flow from internal memory, export to D/A transform coding module then), signal is decompressed, this signal is transferred to D/A transform coding module;
D/A transform coding module is with go forward side by side line number mould conversion of the encoding digital signals that receives, output analog video signal.
Further, radio communication between described UWB transmitter unit and the UWB receiving element.
Further, described video conversion module comprises video phase-locked loop chip and multifunction converter, the GHSD I V signal that video phase-locked loop chip reception line synchronizing signal and multifunction converter provide, through phase comparator and the loop filter in the video phase-locked loop chip, thereby the control voltage controlled oscillator produces the video pixel Dot Clock (GCLK) that multifunction converter is write synchronous needs; Multifunction converter is connected with memory, and writes clock (WCK), writes reset (WRST), writes permission (WE) and come writing of control of video pixel by the data of memory, data to stay alone with writing be the same.After vision signal was input to video conversion module, video phase-locked loop chip and multifunction converter can extract the field frequency and the line frequency of input signal, guaranteed that by the read-write sequence of controlling external memory storage output signal is standard compliant signal.
Further, described A/D transforms decode module comprises a digital video decoder.Can simulated input processor selection input from the analog video signal of video conversion module output, carry out signal clamper control and treatment and automatic gain control and treatment then, can be admitted to analog to digital converter afterwards and carry out digitlization.The later vision signal of digitlization can be passed through auto-adaptive comb filter separating luminance and colourity.Subsequently brightness and colourity are handled, can a separating luminance and colourities or only brightness and colourity are handled for other signal specific, synchronizing signal can be decoded, and as the output control of decoding.After passing through scaler and output formatization at last, analog video signal originally can convert digital data signal to.Digital video decoder is to pass through I by video processor A
2The C center line is realized configuration.
Further, described first video processor comprises the first video processor chip, EEPROM, memory system and NAND FLASH.After digital data signal is transferred to the video processor chip, video processor can be handled data-signal by VIP, and store among the DDR SDRAM by dma mode and to go, use encoder that the video data in the internal memory is compressed afterwards, can in certain bandwidth, provide the higher picture quality that compares like this.Can be kept among the DDR SDRAM after data are compressed, subsequently video data be sent.
The UWB transmitter unit mainly is the task of being finished the key data transmission by super wideband wireless module, whole module is integrated radio frequency chip, base band control chip and medium access control chip, the data-signal that can send over by pci interface receiver, video processor A.After receiving data-signal, the UWB transmitter unit can send packing data.
The UWB receiving element also is to finish main task by a super wideband wireless module, and module receives behind the wireless data its decompress(ion) and sends second video processor to.
It is identical with the composition of the first above-mentioned video processor that second video processor is formed, and the video processor chip can be exported the digital data transmission of specific format to D/A transform coding module through the processing of each unit then to receiving next data decompression.
Further, described D/A transform coding module comprises digital video code, and digital video code is the video output signals of multiple form with the digital signal encoding that receives, and for example can export the CVBS signal of NTSC/PAL system, RGA signal and S-Video signal are supported HDTV simultaneously; And be converted to analog signal output.
Vision signal radio transmitting device provided by the invention and method have following advantage: it is more flexible that the user is used, and also can be used as the radio transmission apparatus of projecting apparatus simultaneously, makes projecting apparatus have more mobility like this, expands the scope of application of projecting apparatus.Certainly simply handle by the interface of video being accepted the processing module back, realize being connected of computer and TV then, can expand the function of various electrical equipment like this.In a word, this video wireless transmitting system can increase the mobility of equipment, expands its scope of application and function of use, improves utilization rate of equipment and installations.Simultaneously can form network within the specific limits, make video that the point-to-area transmission of being transferred to of point-to-point be arranged.But plug and play assembles and disposes fast and convenient, and later maintenance is more easy and occupation mode is more flexible.Also can link to each other with TV box simultaneously, realize display wireless receiving TV signal with TV card.
Description of drawings:
Fig. 1 is a system configuration theory diagram of the present invention;
Fig. 2 is the theory diagram of video conversion module;
Fig. 3 is the theory diagram of Video processing transmitting terminal;
Fig. 4 is the theory diagram of video reception end of convert.
Embodiment
Embodiment with indefiniteness further explains, illustrates the technical program below.
A kind of vision signal radio transmitting device as Fig. 1-shown in Figure 4, comprises the Video processing transmitting terminal and accepts end of convert.
The Video processing transmitting terminal comprises: video conversion module, A/D transforms decode module, first video processor and UWB transmitter unit.
Video conversion module: receiving video signals, the line frequency and the field frequency of extraction vision signal by the read-write sequence of the memory in the control module, are converted to the signal that meets the NSTC/PAL system with vision signal, and are transferred to A/D transforms decode module.Video conversion module mainly is made up of video phase-locked loop chip and multifunction converter as shown in Figure 2, the GHSDIV signal that video phase-locked loop chip reception line synchronizing signal and transducer provide, two paths of signals is through phase comparator and loop filter in the chip, thereby the control voltage controlled oscillator produces the multifunction converter field memory like this and writes synchronous needed video pixel Dot Clock (GCLK).Multifunctional converter also needs external memorizer, and multifunction converter is write clock (WCK), writes reset (WRST), write permission (WE) and come writing of control of video pixel by the data of storage chip, data to read with writing be the same.
After vision signal was input to video conversion module, video phase-locked loop chip and multifunction converter can extract the field frequency and the line frequency of input signal, guaranteed that by the read-write sequence of controlling external memory storage output signal is standard compliant signal.
A/D transforms decode module: the signal that receives is carried out analog-to-digital conversion, again digitized signal is carried out separating of brightness and colourity, and it is handled, decode simultaneously and some corresponding processing and conversion, comprise after the bright signal processing, bright signal is converted into YC
bC
rComponent signal is exported control simultaneously with the synchronizing signal decoding, and with it as decoding, exports digital yuv data at last; And the digital signal after will handling is exported to first video processor.
A/D transforms decode module is to finish main work by digital video decoder, can simulated input processor selection input from the analog video signal of video conversion module output, carry out signal clamper control and treatment and automatic gain control and treatment then, can be admitted to analog to digital converter afterwards and carry out digitlization.The later vision signal of digitlization can be passed through auto-adaptive comb filter separating luminance and colourity.Subsequently brightness and colourity are handled, can a separating luminance and colourities or only brightness and colourity are handled for other signal specific, synchronizing signal can be decoded, and as the output control of decoding.After passing through scaler and output formatization at last, analog video signal originally can convert digital data signal to.Digital video decoder is to pass through I by first video processor
2The C center line is realized configuration.
First video processor: provide clock signal to each module, realization is to the selection configuration of input pattern, handle to the received signal and store, after this is treated to video data and is input to first video processor, the yuv data that video input processing unit (VIP) in the processor will meet separates, can handle accordingly according to application, be stored at last in the internal memory, store data can be exported to the UWB transmitter unit here.
First video processor mainly is made up of video processor chip, EEPROM, memory system (DDR) and NAND FLASH etc.After digital data signal is transferred to the video processor chip, video processor can be handled data-signal by VIP, and store among the DDR SDRAM by dma mode and to go, use encoder that the video data in the internal memory is compressed afterwards, can in certain bandwidth, provide the higher picture quality that compares like this.Can be kept among the DDR SDRAM after data are compressed, subsequently video data be sent.
UWB transmitter unit: signal is packed, and be transferred to the UWB receiving element.
Accepting end of convert comprises: UWB receiving element, second video processor, D/A transform coding module.
UWB receiving element: the data that receive are unpacked and be transferred to second video processor; Radio communication between UWB transmitter unit and the UWB receiving element.
Second video processor: D/A transform coding module is configured, (second video processor can store the video data that receives in the internal memory into to handle the signal that receives, the high-quality video output unit of processor extracts the yuv data that separates and is converted into standard compliant data flow from internal memory, export to D/A transform coding module then), signal is decompressed, this signal is transferred to D/A transform coding module; Its composition is identical with first video processor.
D/A transform coding module: with go forward side by side line number mould conversion of the encoding digital signals that receives, output analog video signal.D/A transform coding module mainly is a digital video code, after digital video code receives digital signal, its main task is to be the vision signal output of multiple form with digital data coding, exports the status analog signal at last and finishes output by different interfaces.Each parameter of digital video code is to pass through I by second Video processing
2The C bus is configured.
Claims (6)
1. vision signal radio transmitting device is characterized in that: comprise the Video processing transmitting terminal and accept end of convert, wherein, the Video processing transmitting terminal comprises:
Video conversion module, receiving video signals, the line frequency and the field frequency of extraction vision signal are converted to the signal that meets the NSTC/PAL system with vision signal, and are transferred to A/D transforms decode module;
A/D transforms decode module is carried out analog-to-digital conversion with the signal that receives, and more digitized signal is carried out separating of brightness and colourity, after bright signal is handled, bright signal is converted into YC
bC
rComponent signal is exported control simultaneously with the synchronizing signal decoding, and with it as decoding, exports digital yuv data at last and gives first video processor;
First video processor provides clock signal to each module, realizes the selection configuration to input pattern, carries out yuv data separation and storage to the received signal, finally is transferred to the UWB transmitter unit;
The UWB transmitter unit is packed signal, and is transferred to the UWB receiving element;
Accepting end of convert comprises:
The UWB receiving element unpacks and is transferred to second video processor with the data that receive;
Second video processor is configured D/A transform coding module, and the data that receive are decompressed, and extracts the data of the YUV that separates then and is converted into yuv data stream, and export to D/A transform coding module;
D/A transform coding module is with go forward side by side line number mould conversion of the encoding digital signals that receives, output analog video signal.
2. vision signal radio transmitting device according to claim 1 is characterized in that: radio communication between described UWB transmitter unit and the UWB receiving element.
3. vision signal radio transmitting device according to claim 1 and 2, it is characterized in that: described video conversion module comprises video phase-locked loop chip and multifunction converter, the GH S D I V signal that video phase-locked loop chip reception line synchronizing signal and multifunction converter provide, through phase comparator and the loop filter in the video phase-locked loop chip, thereby the control voltage controlled oscillator produces the video pixel Dot Clock that multifunction converter is write synchronous needs; Multifunction converter is connected with memory, and writes clock, writes and reset, write and allow writing of control of video pixel by the data of memory.
4. vision signal radio transmitting device according to claim 3 is characterized in that: described A/D transforms decode module comprises a digital video decoder.
5. vision signal radio transmitting device according to claim 4 is characterized in that: described first video processor comprises the first video processor chip, EEPROM, memory system and NAND FLASH.
6. vision signal radio transmitting device according to claim 1 and 2, it is characterized in that: described D/A transform coding module comprises digital video code, digital video code is a video output signals with the digital signal encoding that receives, and is converted to analog signal output.
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| CN 201110108159 CN102186074A (en) | 2011-04-28 | 2011-04-28 | Video signal wireless transmission device |
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| CN 201110108159 CN102186074A (en) | 2011-04-28 | 2011-04-28 | Video signal wireless transmission device |
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Citations (3)
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| CN1731826A (en) * | 2005-08-01 | 2006-02-08 | 北京中星微电子有限公司 | Wireless webcam |
| CN101106712A (en) * | 2007-08-08 | 2008-01-16 | 华南理工大学 | High-speed wireless transmission method and device for multi-channel analog/digital mixing signal |
| CN101466048A (en) * | 2009-01-09 | 2009-06-24 | 华亚微电子（上海）有限公司 | Digital demodulation method for non-synchronous composite video signal and S video signal |
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2011
- 2011-04-28 CN CN 201110108159 patent/CN102186074A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1731826A (en) * | 2005-08-01 | 2006-02-08 | 北京中星微电子有限公司 | Wireless webcam |
| CN101106712A (en) * | 2007-08-08 | 2008-01-16 | 华南理工大学 | High-speed wireless transmission method and device for multi-channel analog/digital mixing signal |
| CN101466048A (en) * | 2009-01-09 | 2009-06-24 | 华亚微电子（上海）有限公司 | Digital demodulation method for non-synchronous composite video signal and S video signal |
Non-Patent Citations (2)
| Title |
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| 《电子与自动化》 19990210 文一宁等 基于PCI总线的数字视频监控***图像采集的研制 18-21 1-6 , 第01期 * |
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Application publication date: 20110914 |