CN101316361A - High-resolution digital image conveying method at low network band width - Google Patents
High-resolution digital image conveying method at low network band width Download PDFInfo
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- CN101316361A CN101316361A CN 200710041578 CN200710041578A CN101316361A CN 101316361 A CN101316361 A CN 101316361A CN 200710041578 CN200710041578 CN 200710041578 CN 200710041578 A CN200710041578 A CN 200710041578A CN 101316361 A CN101316361 A CN 101316361A
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Abstract
The invention relates to a method for transmitting high definition digital images by a low network bandwidth, which is realized by the following steps: the Mpeg4 algorithm is adopted to compress a local video; by carrying out data analysis to the collected and compressed video data, key frame data generated by the Mpeg-4 compression algorithm is extracted; after the key frame data is analyzed and compressed again, the data is packed and encapsulated; each key frame is encapsulated in a manner of complete data packet and inputted into a network for sending and caching in the manner of complete data packet after the encapsulation is finished; a procedure is sent by the network and monitored by a remote network; the method has the advantages that: in the condition of ultra-low network bandwidth (higher than 1Kb), the high definition digital images can be transmitted with definition of 352 multiplied by 288 at the speed of one frame per N seconds (N is equal to 1, 2 and 3, etc.) to a long distance by the network.
Description
Technical field
The present invention relates to the method that a kind of digital picture transmits, relate in particular to the method that the high-resolution digital image under a kind of low network band width transmits.
Background technology
Digital video compaction technique has developed into ripe relatively stage, and the compression of digital video method of current main flow is as follows:
MPEG-1: formal name is called " based on the compression standard of digital storage media moving image and sound ", the digital storage media moving image of transmission 1.5Mbps data transmission rate and the coding of sound accompaniment thereof, and definition is 352 * 288; This compression method solves multimedia storage problem emphatically; MPEG-1 allow to surpass 70 minutes high-quality video and audio storage on a CD-ROM dish.What VCD adopted is exactly the compression algorithm standards of MPEG-1, and this algorithm standard is a video towards family's television-quality level, audio compress standard.At Phase Alternation Line system, per second 25 frames, under TSC-system, per second 30 frames; Minimum frame per second can arrive per second one frame.
MPEG-2: formal name is called " general image harmony sound press contract standard ".Transmission rate is 10Mbps, and definition is 704 * 576, and the needs at high definition TV (HDTV) are applied to DVD, top box of digital machine etc.; At Phase Alternation Line system, per second 25 frames, under TSC-system, per second 30 frames; Minimum frame per second can arrive per second one frame.
MPEG-4: formal name is called " compression standard of ultralow code check moving image and language ", this algorithm is prepared for Internet video, and under 48Kb-64Kb, its minimum image quality Qqif (88 * 72) can carry out image transmission; At Phase Alternation Line system, per second 25 frames, under TSC-system, per second 30 frames; Minimum frame per second can arrive per second one frame.
MPEG 1 provides a more wide platform for the multi-medium data compression.Its more definition be a kind of form, a kind of framework, rather than concrete algorithm.It can comprise some instruments, the algorithm of compression itself with various multimedia technologies fully with coming in, and comprises technology such as image is synthetic, phonetic synthesis.
Above compression method, comprise state-of-the-art H.264 (being MPEG-4 part10) at present, these compression algorithms all have a common characteristic, both adopted the key frame technology, in the unit interval, gather and preserve the key frame pictorial information in other words, just only storing the part that relative this key frame of all the other frames changes then, to reach the purpose of compression, all is to diminish image compression;
Above-mentioned video compression algorithm and standard have promoted the development in digital video field greatly; But at some special occasions, under the ultralow network bandwidth, even state-of-the-art H.264 compress technique, the non real-time that still can't finish long-range high definition image transmits to be observed.
With present state-of-the-art MPEG4-part 10 compression methods, super tail band wide down (＜32Kb) under, even if to fall frame, dynamic code stream, technology such as limit code stream are the images that can't effectively transmit clear image quality (352 * 288); And if satisfy the network-wide requirement to lose image quality, then the remote image quality can't be satisfactory.
Summary of the invention
The technical issues that need to address of the present invention have provided the method that the high-resolution digital image under a kind of low network band width transmits, and are intended to solve the above problems.
In order to solve the problems of the technologies described above, the present invention realizes by following steps:
Adopt the Mpeg4 algorithm by local video compression, analog video signal is gathered with the above image quality of SD (352 * 288) and compressed;
By the video data of gathering after compressing is carried out data analysis, extract the key frame data that the Mpeg-4 compression algorithm produces, key frame data is analyzed compression once more, after finishing, carry out the packing data encapsulation, to each key frame all the form of a complete data packet encapsulate, with the form of complete data packet, put into network and send buffer memory after finishing;
By the network router, the transmission situation according to current network sends data cached situation in conjunction with current network again, and the complete packet that receives is selectively sent;
By the Remote Network Monitoring program, receive network data after, carry out network data analysis and unpack, unpack the back network data and analyze once more, restore a complete compression rear video key frame packet, decompress afterwards, and the reconstruction of key frame data, carry out the decoding of image.
Compared with prior art, the invention has the beneficial effects as follows: under the condition of the ultralow network bandwidth (＞1Kb), can be above image quality with (352 * 288), can be with N (N=1,2.3...) speed of a second frame, see through network toward the clear high image quality image of teletransmission.
Description of drawings
Fig. 1 is a flow chart of the present invention;
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is described in further detail:
As seen from Figure 1: the present invention realizes by following steps:
Adopt the Mpeg4 algorithm by local video compression, analog video signal is gathered with the above image quality of SD (352 * 288) and compressed;
By the video data of gathering after compressing is carried out data analysis, extract the key frame data that the Mpeg-4 compression algorithm produces, key frame data is analyzed compression once more, after finishing, carry out the packing data encapsulation, to each key frame all the form of a complete data packet encapsulate, with the form of complete data packet, put into network and send buffer memory after finishing;
By the network router, the transmission situation according to current network sends data cached situation in conjunction with current network again, and the complete packet that receives is selectively sent;
By the Remote Network Monitoring program, receive network data after, carry out network data analysis and unpack, unpack the back network data and analyze once more, restore a complete compression rear video key frame packet, decompress afterwards, and the reconstruction of key frame data, carry out the decoding of image.
The present invention has overcome in the prior art and has not made the particular study exploitation at ultralow bandwidth, the application of digital video will further be expanded, bad to those network connection states simultaneously, need the client who carries out the digital remote video monitor will bring perfect solution again.
Claims (1)
1. the method that transmits of the high-resolution digital image under the low network band width, realize by following steps:
Adopt the Mpeg4 algorithm by local video compression, analog video signal is gathered with the above image quality of SD (352 * 288) and compressed;
By the video data of gathering after compressing is carried out data analysis, extract the key frame data that the Mpeg-4 compression algorithm produces, key frame data is analyzed compression once more, after finishing, carry out the packing data encapsulation, to each key frame all the form of a complete data packet encapsulate, with the form of complete data packet, put into network and send buffer memory after finishing;
By the network router, the transmission situation according to current network sends data cached situation in conjunction with current network again, and the complete packet that receives is selectively sent;
By the Remote Network Monitoring program, receive network data after, carry out network data analysis and unpack, unpack the back network data and analyze once more, restore a complete compression rear video key frame packet, decompress afterwards, and the reconstruction of key frame data, carry out the decoding of image.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200710041578 CN101316361A (en) | 2007-06-01 | 2007-06-01 | High-resolution digital image conveying method at low network band width |
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| CN 200710041578 CN101316361A (en) | 2007-06-01 | 2007-06-01 | High-resolution digital image conveying method at low network band width |
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| CN101316361A true CN101316361A (en) | 2008-12-03 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102316359A (en) * | 2010-06-30 | 2012-01-11 | 青岛海信电器股份有限公司 | Method and device for transmitting video data |
| CN103514225A (en) * | 2012-06-27 | 2014-01-15 | 浙江大华技术股份有限公司 | Multiplexing method and device of data source |
| CN113703904A (en) * | 2021-10-26 | 2021-11-26 | 杭州子默网络科技有限公司 | Method and system for improving character definition through cloud computer and readable storage medium |
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2007
- 2007-06-01 CN CN 200710041578 patent/CN101316361A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102316359A (en) * | 2010-06-30 | 2012-01-11 | 青岛海信电器股份有限公司 | Method and device for transmitting video data |
| CN103514225A (en) * | 2012-06-27 | 2014-01-15 | 浙江大华技术股份有限公司 | Multiplexing method and device of data source |
| CN103514225B (en) * | 2012-06-27 | 2016-12-21 | 浙江大华技术股份有限公司 | The multichannel multiplexing method of a kind of data source and device thereof |
| CN113703904A (en) * | 2021-10-26 | 2021-11-26 | 杭州子默网络科技有限公司 | Method and system for improving character definition through cloud computer and readable storage medium |
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Open date: 20081203 |