CN102905132B - The compression and decompression device of wireless video transmission - Google Patents
The compression and decompression device of wireless video transmission Download PDFInfo
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Abstract
The invention provides a kind of compression and decompression method and device thereof of wireless video transmission.This method is: video data compresses by video compression end, is then sent to video decompression end by radio transmitters, and video compression end and video decompression end carry out exchanges data by wireless communication protocol WHDI; The video data that wireless receiver receives by video decompression end decompresses, and then is shown on display device.The compression set of this wireless video transmission is added module formed by reduce by half compression module, compressed reference frame judge module and compact token of compressed image memory module, pixel bit separation module, first-order difference prefix compression module, length; The decompressing device of this wireless video transmission is reduced by half by length, and decompression module, single order prefix decompression module, pixel bit merge module, decompressing image memory module, compact token identification module are conciliate compressed reference frame judge module and formed.Present invention reduces the transmitted data amount of wireless video transmission.
Description
Technical field
The present invention relates to a kind of compression and decompression method and device thereof of wireless video transmission, comprise decompression method and device thereof that data source looks closely compression method frequently and device and display end video.
Background technology
Along with developing rapidly of the every technology of mobile terminal, people have higher requirement to the Consumer's Experience degree based on mobile terminal.When mobile status, the display screen of mobile terminal is used to carry out viewing film, receiving and dispatching mail, check picture, the movable demand that can meet most user such as online amusement etc., but when remain static and near have a local large-screen display time, if above-mentioned activity can be carried out on local large-screen display, not only can bring better visual effect to user, but also video can be shared, the public resources such as picture with other users of surrounding.
Nowadays, generally the wireline interface modes such as RGB, VGA, DVI are adopted between data source and display, wired distance not only seriously limited between user and display that is connected between mobile terminal with display, if be equipped with corresponding data-interface on mobile terminals, both have impact on the frivolous degree of mobile terminal, and make again the aesthetics of mobile terminal and terseness have a greatly reduced quality.
Meanwhile, existing wireless data transmission protocols efficiency of transmission is general not high, based in the application that the wireless transmission method of WiFi transmits at HD video, will cause the loss of picture quality and obvious data delay; Though and wireless transmission protocol such as WHDI etc. can carry out without time delay ground nondestructively HD video wireless transmission, but it still has some weak point following: transmitted data amount is huge, and efficiency of transmission is not high, and power consumption is large.
Summary of the invention
The object of the present invention is to provide a kind of compression and decompression method and the device thereof of supporting the wireless video transmission of movable equipment, release system is to physical connection line, mobile device is to the dependence of display screen, the display of support equipment this locality, user is made to watch video, check and accept mail, check that the activities such as picture more freely facilitate, and do not affect the surface structure of equipment.This system is in conjunction with length halving method and first-order difference prefix notation, propose a kind of novel harmless compression and decompression method being applicable to wireless video transmission, reduce transmitted data amount and the power consumption of wireless video transmission, improve the efficiency of Wireless Data Transmission.
For achieving the above object, design of the present invention is: the compression and decompression method of wireless video transmission of the present invention and device thereof, can be applicable to the compression of video compression end data and the decompression of video decompression end data, between video compression end and video decompression end, carry out compressed exchanges data by wireless communication protocol WHDI.
The compression and decompression method of above-mentioned wireless video transmission, comprising: the video data that movable equipment produces compresses by video compression end, is then sent to video decompression end by radio transmitters; Video compression end adopts a kind of lossless compression algorithm based on spatial domain; The described lossless compression algorithm based on spatial domain combines length to reduce by half a kind of novel lossless video compression algorithm that compression method and first-order difference prefix compression method propose; Video decompression end adopts a kind of length that combines to reduce by half the decompression algorithm that decompression method and first-order difference prefix decompression method propose, and the video data received by wireless receiver decompresses, and then is shown on display device.
In the compression and decompression method of above-mentioned wireless video transmission, field feedback sending module and feedback information receiver module provide information back function for user, and the signal of these two modules directly transmits without data compression.User controls in real time the video data signal of video compression end on video decompression end, as touch screen signal, and keyboard signal, mouse signal etc.
The compression set of above-mentioned wireless video transmission, comprising: compressed image memory module, pixel bit separation module, first-order difference prefix compression module, length reduce by half compression module, compressed reference frame judge module and compact token add module; It is characterized in that: whether compressed reference frame judge module is reference frame for the frame video signal judging movable equipment and export, reference frame and the non-reference frame position relationship in video source data is a reference frame, two continuous non-reference frame cross arrangement, reference frame only adopts frame data compression video data, do not adopt interframe compression, non-reference frame only adopts interframe compression data, does not adopt frame data compression; Compressed image memory module is for storing the uncompressed front video data of current reference frame; Pixel bit separation module carries out position separation with reference to the pixel in every a line video data of frame, and a pixel separation RGB being respectively 8 is 24.In every a line video data, the identical bits of pixel is placed on a length and reduces by half in compression module and process, and have 24 length to reduce by half compression module altogether, the data compressed export immediately, not time delay; First-order difference prefix compression module is used for each for same position between non-reference frame and reference frame pixel value to do difference, according to similar huffman algorithm, is represented by maximum for differential probability with minimum position, minimum the representing with maximum positions of differential probability; Length reduces by half compression module for the data after the process of pixel bit separation module are carried out Lossless Compression, according to similar distance of swimming method, the number of continuous print " 0 " and " 1 " in a line video data is counted, choose suitable threshold value, continuous number is less than threshold value and then keeps former data, continuous number is more than or equal to threshold value and then first gained number and threshold value is sued for peace, and gained two number sum, again divided by 2, obtains remainder and business; Compact token is added module and is used for the total bit of the remainder of gained and business to compare with compression required value, if the former is less than the latter, then take this compress mode, if the former is more than or equal to the latter, then retain former transfer of data, data after overcompression add one token foremost every data line stream, at every data line stream, unpressed data add that " 0 " marks foremost.According to the described compression method based on wireless video transmission and device thereof, avoid video image and be transformed into Frequency Domain Coding by discrete cosine transform etc., reach the effect that compression speed is faster, time delay is lower.After described pixel bit separation module process reference frame vision signal, then to be reduced by half module condenses by length, compression ratio generally can reach 50%, and the non-reference frame after the compression of first-order difference prefix module, compression ratio generally can reach about 60%.Data after overcompression are directly transmitted by WHDI wireless transmission protocol, and high definition video signal can be transmitted in low resolution video signal transmission channel.
Above-mentioned wireless video transmission decompressing device, comprising: length reduces by half, and decompression module, single order prefix decompression module, pixel bit merge module, decompressing image memory module, compact token identification module conciliate compressed reference frame judge module; It is characterized in that: described compact token identification module is for reading every data line stream first, if " 1 " then needs to decompress, if " 0 " then need not decompress; Whether decompression reference frame judge module is reference frame for the one-frame video data judging wireless receiver and receive, if, then import the length decompression module that reduces by half into and carry out data decompression, if not, then import single order prefix decompression module into and carry out data decompression; The length decompression module that reduces by half reverts to former video reference frame data for the data received by wireless receiver according to the form of quotient and the remainder, recovers full one-row pixels number and just stops decompressing, start to carry out the analysis of next line video data; Pixel bit merges the module decompression module data obtained that decompress that are used for length to reduce by half and after pixel bit merging, obtains 24 complete pixel datas again; Decompressing image memory module is used for storage of reference frames video data; Single order prefix decompression module is for recovering non-reference frame video data; Display device is used for the video data after by decompression and shows.
According to foregoing invention design, the present invention adopts following technical proposals:
A kind of compression and decompression method of wireless video transmission, it is characterized in that: the video data that movable equipment produces compresses by video compression end, then be sent to video decompression end by radio transmitters, video compression end and video decompression end carry out exchanges data by wireless communication protocol WHDI; Increase transmission channel controlling functions after video compression, after video decompression, increase image zooming function; Video compression end adopts a kind of lossless compression algorithm based on spatial domain, and the described lossless compression algorithm based on spatial domain combines length to reduce by half a kind of novel video lossless compression algorithm that compression method and first-order difference prefix compression method propose; Video decompression end adopts a kind of length that combines to reduce by half the decompression algorithm that decompression method and first-order difference prefix decompression method propose, and the video data received by wireless receiver decompresses, and then is shown on display device; Except vision signal needs are compressed and decompressed, field feedback signal directly transmits without Compress and decompress of the data contracting.
A kind of compression set of wireless video transmission, be applied to said method, comprise: compressed image memory module (101), pixel bit separation module (102), first-order difference prefix compression module (104), length reduce by half compression module (103), compressed reference frame judge module (105) and compact token add module (106), it is characterized in that: described compressed reference frame judge module (105) is for judging when whether last frame video signal is reference frame, it is input as the vision signal that movable equipment (301) exports, export as present frame vision signal and compressed reference frame enable signal, present frame vision signal is connected to compressed image memory module (101) respectively, pixel bit separation module (102), first-order difference prefix compression module (104), compressed reference frame enable signal is connected to compressed image memory module (101) respectively, pixel bit separation module (102), first-order difference prefix compression module (104), compact token adds module (106), described compressed image memory module (101) is for storing the uncompressed front video data of current reference frame, it is input as present frame vision signal and compressed reference frame enable signal that compressed reference frame judge module (105) exports, exports and is connected to first-order difference prefix compression module (104), described pixel bit separation module (102) carries out position separation with reference to the pixel in every a line video data of frame, it is input as present frame vision signal and compressed reference frame enable signal that compressed reference frame judge module (105) exports, exports to be connected to length and to reduce by half compression module (103), described first-order difference prefix compression module (104) is for doing difference coding by each for same position between non-reference frame and reference frame pixel value, it is input as present frame vision signal that compressed reference frame judge module (105) exports and the reference frame vision signal that compressed image memory module (101) exports, and exports to be connected to compact token and to add module (106), described length reduces by half compression module (103) for the data after pixel bit separation module (102) process are carried out Lossless Compression, and it is input as the data after pixel bit separation module (102) process, exports and is connected to compact token interpolation module (106), described compact token adds module (106) for marking to the data after overcompression adding foremost of every data line stream and export correct present frame video compression data, the video data that it is input as compressed reference frame enable signal that compressed reference frame judge module (105) exports, first-order difference prefix compression module (104) exports and length reduce by half the video data that compression module (103) exports, and export the final data after into the compression set process of wireless video transmission.
A kind of decompressing device of wireless video transmission, be applied to said method, comprise: length reduce by half decompression module (201), first-order difference prefix decompression module (204), pixel bit merge module (202), decompressing image memory module (203), compact token identification module (205) conciliate compressed reference frame judge module (206), it is characterized in that: described decompression reference frame judge module (206) is for judging whether the frame video compression data received is reference frame, it is input as the frame video compression data that wireless receiver receives, export as present frame video compression data conciliates compressed reference frame enable signal, present frame video compression data is connected to compact token identification module (205), decompression reference frame enable signal is connected to length respectively and reduces by half decompression module (201), single order prefix decompression module (204), decompressing image memory module (203), the output of decompressing device, described compact token identification module (205) is for judging that data flow is the need of decompression, it is input as the present frame video compression data that decompression reference frame judge module (206) exports, export as compression enable signal and present frame video compression data, compression enable signal and present frame video compression data are connected to length respectively and reduce by half decompression module (201), single order prefix decompression module (204), described length reduces by half decompression module (201) for the decompression received reference frame video compression data is reverted to former video reference frame data, it is input as compression enable signal that compact token identification module (205) exports, present frame video compression data conciliates the decompression reference frame enable signal that compressed reference frame judge module (206) exports, and exports to be connected to pixel bit and to merge module (202), described pixel bit merges module (202) and after pixel bit merging, obtains 24 complete pixel video data again for the decompression module (201) that length the reduced by half video data obtained that decompresses, it is input as length and reduces by half the video data that decompression module (201) exports, and exports the output and the decompressing image memory module (203) that are connected to decompressing device, described decompressing image memory module (203) is for storing decompression reference frame video data, and it is input as 24 complete pixel video data that pixel bit merging module (202) exports, and exports and is connected to single order prefix decompression module (204), described single order prefix decompression module (204) is for recovering non-reference frame video data, be input as present frame video compression data that compact token identification module (205) exports and the reference frame data that decompressing image memory module (203) exports, export the output being connected to decompressing device.
The present invention compared with prior art, has following apparent advantage and marked improvement:
The present invention adopts a kind of wireless transmission protocol that can transmit high definition lossless video data, and provide a kind of compression and decompression method and device thereof of wireless video transmission on its basis, the transmitted data amount that compensate for existing wireless transmission method is huge, efficiency of transmission is not high, the shortcoming that power consumption is large.Therefore, the compression and decompression method of the wireless video transmission that the present invention proposes and device thereof are compared with the WHDI agreement of not carrying out data compression, through-put power is less, can support higher resolution under limited data channel, and time delay is also within user's permissible range.Wirelessly transmission of video, not only can reduce the interface of movable equipment, and avoids the distance between physical connection line restriction movable equipment and display device, the movable equipment interface problem such as cause profile unsightly more.
Accompanying drawing explanation
Fig. 1 is the schematic block circuit diagram of wireless video compression set of the present invention.
Fig. 2 is the schematic block circuit diagram of wireless video decompressing device of the present invention.
Fig. 3 is the functional block diagram of the wireless video transmission system that wireless video Compress softwares compression apparatus of the present invention can be used for.
Fig. 4 is the functional block diagram adding the wireless video transmission system of image scaling circuit after the wireless video decompressing device of Fig. 3.
Fig. 5 is the functional block diagram adding the wireless video transmission system of transmission channel decision circuitry after the wireless video compression set of Fig. 3.
Embodiment
Now be described with reference to the accompanying drawings the preferred embodiments of the present invention.
Embodiment one:
See Fig. 1, the compression/decompression method of this wireless video transmission, it is characterized in that: the video data that movable equipment produces compresses by video compression end, then be sent to video decompression end by radio transmitters, video compression end and video decompression end carry out exchanges data by wireless communication protocol WHDI; Increase transmission channel controlling functions after video compression, after video decompression, increase image zooming function; Video compression end adopts a kind of lossless compression algorithm based on spatial domain, and the described lossless compression algorithm based on spatial domain combines length to reduce by half a kind of novel video lossless compression algorithm that compression method and first-order difference prefix compression method propose; Video decompression end adopts a kind of length that combines to reduce by half the decompression algorithm that decompression method and first-order difference prefix decompression method propose, and the video data received by wireless receiver decompresses, and then is shown on display device; Except vision signal needs are compressed and decompressed, field feedback signal directly transmits without Compress and decompress of the data contracting.
Embodiment two:
See Fig. 1, the compression set of this wireless video transmission, be applied to said method, it comprises: compressed image memory module (101), pixel bit separation module (102), first-order difference prefix compression module (104), length reduce by half compression module (103), compressed reference frame judge module (105) and compact token add module (106), it is characterized in that: described compressed reference frame judge module (105) is for judging when whether last frame video signal is reference frame, it is input as the vision signal that movable equipment (301) exports, export as present frame vision signal and compressed reference frame enable signal, present frame vision signal is connected to compressed image memory module (101) respectively, pixel bit separation module (102), first-order difference prefix compression module (104), compressed reference frame enable signal is connected to compressed image memory module (101) respectively, pixel bit separation module (102), first-order difference prefix compression module (104), compact token adds module (106), described compressed image memory module (101) is for storing the uncompressed front video data of current reference frame, it is input as present frame vision signal and compressed reference frame enable signal that compressed reference frame judge module (105) exports, exports and is connected to first-order difference prefix compression module (104), described pixel bit separation module (102) carries out position separation with reference to the pixel in every a line video data of frame, it is input as present frame vision signal and compressed reference frame enable signal that compressed reference frame judge module (105) exports, exports to be connected to length and to reduce by half compression module (103), described first-order difference prefix compression module (104) is for doing difference coding by each for same position between non-reference frame and reference frame pixel value, it is input as present frame vision signal that compressed reference frame judge module (105) exports and the reference frame vision signal that compressed image memory module (101) exports, and exports to be connected to compact token and to add module (106), described length reduces by half compression module (103) for the data after pixel bit separation module (102) process are carried out Lossless Compression, and it is input as the data after pixel bit separation module (102) process, exports and is connected to compact token interpolation module (106), described compact token adds module (106) for marking to the data after overcompression adding foremost of every data line stream and export correct present frame video compression data, the video data that it is input as compressed reference frame enable signal that compressed reference frame judge module (105) exports, first-order difference prefix compression module (104) exports and length reduce by half the video data that compression module (103) exports, and export the final data after into the compression set process of wireless video transmission.
Embodiment three:
See Fig. 5, the present embodiment is substantially identical with embodiment two, and special feature is: after the compression set of wireless video transmission, increase transmission channel control module (501); Described transmission channel control module (501) determines whether needing further process by the size comparing gained video signal compression transmission quantity and given transmission channel capacity, its video compressing module being input as video compression end carries out the data after compressing process to the vision signal that movable equipment (301) transmits, and exports and is connected to radio transmitters; If gained video compression transmission quantity is less than or equal to the size of given transmission channel capacity, then export as gained video compression data, otherwise export again after suitably process is given up to gained video compression data, to reach the object that high definition video signal transmits in low resolution video signal transmission channel.
Embodiment four:
See Fig. 2, the decompressing device of this wireless video transmission, be applied to said method, it comprises: length reduce by half decompression module (201), first-order difference prefix decompression module (204), pixel bit merge module (202), decompressing image memory module (203), compact token identification module (205) conciliate compressed reference frame judge module (206), it is characterized in that: described decompression reference frame judge module (206) is for judging whether the frame video compression data received is reference frame, it is input as the frame video compression data that wireless receiver receives, export as present frame video compression data conciliates compressed reference frame enable signal, present frame video compression data is connected to compact token identification module (205), decompression reference frame enable signal is connected to length respectively and reduces by half decompression module (201), single order prefix decompression module (204), decompressing image memory module (203), the output of decompressing device, described compact token identification module (205) is for judging that data flow is the need of decompression, it is input as the present frame video compression data that decompression reference frame judge module (206) exports, export as compression enable signal and present frame video compression data, compression enable signal and present frame video compression data are connected to length respectively and reduce by half decompression module (201), single order prefix decompression module (204), described length reduces by half decompression module (201) for the decompression received reference frame video compression data is reverted to former video reference frame data, it is input as compression enable signal that compact token identification module (205) exports, present frame video compression data conciliates the decompression reference frame enable signal that compressed reference frame judge module (206) exports, and exports to be connected to pixel bit and to merge module (202), described pixel bit merges module (202) and after pixel bit merging, obtains 24 complete pixel video data again for the decompression module (201) that length the reduced by half video data obtained that decompresses, it is input as length and reduces by half the video data that decompression module (201) exports, and exports the output and the decompressing image memory module (203) that are connected to decompressing device, described decompressing image memory module (203) is for storing decompression reference frame video data, and it is input as 24 complete pixel video data that pixel bit merging module (202) exports, and exports and is connected to single order prefix decompression module (204), described single order prefix decompression module (204) is for recovering non-reference frame video data, be input as present frame video compression data that compact token identification module (205) exports and the reference frame data that decompressing image memory module (203) exports, export the output being connected to decompressing device.
Embodiment five:
See Fig. 4, the present embodiment is substantially identical with embodiment four, and special feature is: increase image scaling module (401) after the decompressing device of wireless video transmission; Described image scaling module (401) can receive the video data from any movable equipment (301), and transmitted video data is zoomed to through video scaling module (401) resolution that display device (309) supports.
Embodiment six:
See Fig. 1, in the compression and decompression method increasing this wireless video transmission after the compression set of wireless video transmission and device thereof, the compression method of wireless video transmission have employed a kind of length that combines based on spatial domain and to reduce by half a kind of novel lossless compression algorithm that compression method and first-order difference prefix compression method propose.The compression set of wireless video transmission, comprising: compressed image memory module (101), pixel bit separation module (102), first-order difference prefix compression module (104), length reduce by half compression module (103), compressed reference frame judge module (105) and compact token add module (106).If reference frame, then carry out packed data by the pixel bit separation module (102) in frame and the length compression module (103) that reduces by half, if non-reference frame, then carry out packed data by first-order difference prefix compression module (104).If video data be have compressed, then compact token interpolation module (106) adds mark " 1 " in a line video data stream first place, if video data is not compressed, then compact token interpolation module labels " 0 " in a line video data stream first place.
See Fig. 2, in the compression and decompression method of this wireless video transmission and device thereof, the decompression method of wireless video transmission have employed a kind of length that combines and to reduce by half the decompression algorithm that decompression method and first-order difference prefix decompression method propose.The decompressing device of wireless video transmission, comprising: reduce by half decompression module (201), single order prefix decompression module (204), pixel bit of length merges module (202), decompressing image memory module (203), compact token identification module (205) and reference frame judge module (206).Judge whether current frame data is reference frame data by reference to frame judge module (206), if current frame data is reference frame data, identify whether vision signal is compressed by compact token identification module (205), if be have compressed, then reduce by half decompression module (201) and pixel bit of length merges module (202) for the recovery to vision signal, if vision signal is not compressed, then a line video data directly exports, if current frame data is non-reference frame vision signal, identify whether vision signal is compressed by compact token identification module (205), if be have compressed, then first-order difference prefix decompression module (204) is for decompressed video signal, if vision signal is not compressed, then a line video data directly exports.
Embodiment seven:
The present embodiment is a kind of application example proposed on embodiment six basis:
See Fig. 3, in the wireless video transmission system that the compression and decompression method of this wireless video transmission and device thereof are used for, video compression end, for generation of compressed video source, is made up of movable equipment (301), video compressing module (302), radio transmitters (303) and field feedback receiver (304).Movable equipment (301) is for generation of data messages such as vision signals, the Novel video compression algorithm that video compressing module (302) proposes according to the present invention for the video data generated by movable equipment (301) is compressed, radio transmitters (303) carries out wireless data transmission according to WHDI agreement, field feedback receiver module (304) wirelessly receiver, video decompressor end send field feedback, video decompression end is for receiving compressed data and the display that decompresses, by wireless receiver (306), video decompression module (307), display device controller (308), display device (309) and field feedback sending module (305) composition, wireless receiver (306) is for wireless receiving video data, the compressed video data that video decompression module (307) receives for decompressing, display device (309) is for display video image, field feedback sending module (305) is for wirelessly sending field feedback to video sending end.
Embodiment eight:
The present embodiment is substantially identical with embodiment seven, and special feature is as follows:
See Fig. 4, in the wireless video transmission system that the compression and decompression method of this wireless video transmission and device thereof are used for, display device (309) can receive the video data from any movable equipment (301), and transmitted video data is zoomed to the resolution of display device support through video scaling module (401).
Embodiment nine:
The present embodiment is substantially identical with embodiment seven, and special feature is as follows:
See Fig. 5, in the wireless video transmission system that the compression and decompression method of this wireless video transmission and device thereof are used for, the video compressing module (302) of video compression end is after the video signal compression process spread out of movable equipment (301), if gained video signal transmission amount is less than the capacity of given transmission passage, then directly export, otherwise export again, to reach the object that high definition video signal transmits in low resolution video signal transmission channel after by transmission channel control module (501) accordingly process being given up to packed data.
Claims (4)
1. a compression set for wireless video transmission, comprising: compressed image memory module (101), pixel bit separation module (102), first-order difference prefix compression module (104), length reduce by half compression module (103), compressed reference frame judge module (105) and compact token add module (106), it is characterized in that: described compressed reference frame judge module (105) is for judging when whether last frame video signal is reference frame, it is input as the vision signal that movable equipment (301) exports, export as present frame vision signal and compressed reference frame enable signal, present frame vision signal is connected to compressed image memory module (101) respectively, pixel bit separation module (102), first-order difference prefix compression module (104), compressed reference frame enable signal is connected to compressed image memory module (101) respectively, pixel bit separation module (102), first-order difference prefix compression module (104), compact token adds module (106), described compressed image memory module (101) is for storing the uncompressed front video data of current reference frame, it is input as present frame vision signal and compressed reference frame enable signal that compressed reference frame judge module (105) exports, exports and is connected to first-order difference prefix compression module (104), described pixel bit separation module (102) carries out position separation with reference to the pixel in every a line video data of frame, it is input as present frame vision signal and compressed reference frame enable signal that compressed reference frame judge module (105) exports, exports to be connected to length and to reduce by half compression module (103), described first-order difference prefix compression module (104) is for doing difference coding by each for same position between non-reference frame and reference frame pixel value, it is input as present frame vision signal that compressed reference frame judge module (105) exports and the reference frame vision signal that compressed image memory module (101) exports, and exports to be connected to compact token and to add module (106), described length reduces by half compression module (103) for the data after pixel bit separation module (102) process are carried out Lossless Compression, and it is input as the data after pixel bit separation module (102) process, exports and is connected to compact token interpolation module (106), described compact token adds module (106) for marking to the data after overcompression adding foremost of every data line stream and export correct present frame video compression data, the video data that it is input as compressed reference frame enable signal that compressed reference frame judge module (105) exports, first-order difference prefix compression module (104) exports and length reduce by half the video data that compression module (103) exports, and export the final data after into the compression set process of wireless video transmission.
2. the compression set of wireless video transmission according to claim 1, is characterized in that: after the compression set of wireless video transmission, increase transmission channel control module (501); Described transmission channel control module (501) determines whether needing further process by the size comparing gained video signal compression transmission quantity and given transmission channel capacity, its video compressing module being input as video compression end carries out the data after compressing process to the vision signal that movable equipment (301) transmits, and exports and is connected to radio transmitters; If gained video compression transmission quantity is less than or equal to the size of given transmission channel capacity, then export as gained video compression data, otherwise export again after suitably process is given up to gained video compression data, to reach the object that high definition video signal transmits in low resolution video signal transmission channel.
3. a decompressing device for wireless video transmission, comprising: length reduce by half decompression module (201), first-order difference prefix decompression module (204), pixel bit merge module (202), decompressing image memory module (203), compact token identification module (205) conciliate compressed reference frame judge module (206), it is characterized in that: described decompression reference frame judge module (206) is for judging whether the frame video compression data received is reference frame, it is input as the frame video compression data that wireless receiver receives, export as present frame video compression data conciliates compressed reference frame enable signal, present frame video compression data is connected to compact token identification module (205), decompression reference frame enable signal is connected to length respectively and reduces by half decompression module (201), first-order difference prefix decompression module (204), decompressing image memory module (203), the output of decompressing device, described compact token identification module (205) is for judging that data flow is the need of decompression, it is input as the present frame video compression data that decompression reference frame judge module (206) exports, export as compression enable signal and present frame video compression data, compression enable signal and present frame video compression data are connected to length respectively and reduce by half decompression module (201), first-order difference prefix decompression module (204), described length reduces by half decompression module (201) for the decompression received reference frame video compression data is reverted to former video reference frame data, it is input as compression enable signal that compact token identification module (205) exports, present frame video compression data conciliates the decompression reference frame enable signal that compressed reference frame judge module (206) exports, and exports to be connected to pixel bit and to merge module (202), described pixel bit merges module (202) and after pixel bit merging, obtains 24 complete pixel video data again for the decompression module (201) that length the reduced by half video data obtained that decompresses, it is input as length and reduces by half the video data that decompression module (201) exports, and exports the output and the decompressing image memory module (203) that are connected to decompressing device, described decompressing image memory module (203) is for storing decompression reference frame video data, and it is input as 24 complete pixel video data that pixel bit merging module (202) exports, and exports and is connected to first-order difference prefix decompression module (204), described first-order difference prefix decompression module (204) is for recovering non-reference frame video data, be input as present frame video compression data that compact token identification module (205) exports and the reference frame data that decompressing image memory module (203) exports, export the output being connected to decompressing device.
4. the decompressing device of wireless video transmission according to claim 3, is characterized in that: increase image scaling module (401) after the decompressing device of wireless video transmission; Described image scaling module (401) can receive the video data from any movable equipment (301), and transmitted video data is zoomed to through image scaling module (401) resolution that display device (309) supports.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210390485.0A CN102905132B (en) | 2012-10-16 | 2012-10-16 | The compression and decompression device of wireless video transmission |
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| CN103441826B (en) * | 2013-07-12 | 2016-12-28 | 中国人民解放军国防科学技术大学 | A kind of method and apparatus reducing radio communication packet loss |
| TW201510967A (en) * | 2013-09-13 | 2015-03-16 | Hon Hai Prec Ind Co Ltd | Display apparatus |
| CN103618903B (en) * | 2013-12-10 | 2017-01-04 | 天津大学 | The high-speed low-power-consumption radio sensing network video compress method of sampling |
| US10313704B2 (en) * | 2014-07-16 | 2019-06-04 | Yamzz Ip Bv | Multilevel video compression, decompression, and display for 4K and 8K applications |
| CN105513101B (en) * | 2015-12-03 | 2018-08-07 | 小米科技有限责任公司 | Image processing method and device |
| CN108810553B (en) * | 2018-05-02 | 2021-01-12 | 上海大学 | Mobile node monitoring data sequence compression method based on sparse processing |
| CN111382853B (en) * | 2018-12-28 | 2022-12-09 | 上海寒武纪信息科技有限公司 | Data processing device, method, chip and electronic equipment |
| CN111381878A (en) * | 2018-12-28 | 2020-07-07 | 上海寒武纪信息科技有限公司 | Data processing device, method, chip and electronic equipment |
| CN110337003B (en) * | 2019-04-29 | 2020-07-07 | 青岛农业大学 | Method for transmitting image by using Beidou system |
| CN116737502A (en) * | 2023-06-26 | 2023-09-12 | 深圳市博德越科技有限公司 | Low-power-consumption docking station and power consumption monitoring method thereof |
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| CN101878423A (en) * | 2007-11-30 | 2010-11-03 | 株式会社岛津制作所 | Time-of-flight measuring device |
| CN102014283A (en) * | 2010-11-30 | 2011-04-13 | 上海大学 | First-order difference prefix notation coding method for lossless compression of image data |
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