CN101707701B - Multi-stream information transmission system and transmission method thereof - Google Patents
Multi-stream information transmission system and transmission method thereof Download PDFInfo
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- CN101707701B CN101707701B CN 200910310481 CN200910310481A CN101707701B CN 101707701 B CN101707701 B CN 101707701B CN 200910310481 CN200910310481 CN 200910310481 CN 200910310481 A CN200910310481 A CN 200910310481A CN 101707701 B CN101707701 B CN 101707701B
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Abstract
The invention relates to a multi-stream information transmission system and a transmission method thereof in the technical field of communication. The multi-stream information transmission system comprises a transmitting end and a receiving end, wherein the transmitting end is connected with the receiving end by a channel; the transmitting end comprises a coder, a data partitioning module, a transmitting end cache, a real-time transmission module and a non-real time transmission module; and the receiving end comprises a feedback module, a receiving end cache, a fusing module and a decoder. The invention can distinguish whether data needs to be transmitted in real time or not in the process of transmission so as to decide to adopt real-time transmission or non-real time transmission, thereby realizing the real-time and high-quality requirements of data and meeting the specific requirements on a security monitoring video by a user.
Description
Technical field
What the present invention relates to is a kind of method of communication technical field, specifically is a kind of multi-stream information transmission system and transmission method thereof that is used for the safety monitoring video.
Background technology
Various for a long time accidents and criminal offense case take place again and again, have seriously influenced people's personal safety and stablizing of society.With the exception of this, some criminal activity has been played destructive infringement to the normal operation of state key department.In order to protect the safety of country and the people's lives and properties, need the complete video safety defense monitoring system of a cover, strengthen social safety management with technological means.
The video safety defense monitoring system has two demands: real-time and high-quality., wired monitoring number of spots limited at wireless bandwidth causes greatly under the not enough situation of bandwidth resources, and the transmitting, monitoring video is difficult to accomplish simultaneously real-time and high-quality.And on the other hand, the image of monitoring is often lower to the picture quality requirement in real time, as long as can see clearly what has taken place; The image that is used to investigate and collect evidence then requires the picture quality height, but time delay can be longer.
Find through retrieval prior art, " a motion vector reuse algorithm that is used for double-stream coding " literary composition in the 3rd harmonious man-machine environment associating (the 16th national multimedia technology, the 3rd national man-machine interaction, the 3rd national general fit calculation) academic meeting paper has proposed a kind of double-stream coding device and produced the two-way code stream: the one tunnel is that the high-resolution code stream is used for local storage, another road is that the low resolution code stream is used for Network Transmission, and this double-stream coding system can satisfy real-time and high-quality demand like this.But this technology has been brought the problem of computation complexity, has increased the storage pressure of transmitting terminal and the inconvenience of investigation and evidence collection simultaneously.
Summary of the invention
The present invention is directed to the prior art above shortcomings, a kind of multi-stream information transmission system and transmission method thereof that is used for the safety monitoring video is provided, can in transmission course, distinguish data and whether need real-time Transmission, thereby real-time Transmission or non real-time transmission are adopted in decision, with this real-time and high-quality requirement that realizes data, satisfy the particular demands of user to the safety monitoring video.
The present invention is achieved by the following technical solutions:
The present invention relates to a kind of multi-stream information transmission system, comprising: transmitting terminal and the receiving terminal that is connected by channel, wherein:
Described transmitting terminal comprises: encoder, data segmentation module, the transmitting terminal buffer memory, real-time Transmission module and non real-time transport module, wherein: encoder links to each other with data segmentation module with the transmission compressed bit stream, data segmentation module is connected with the transmitting terminal buffer memory with encoder respectively and the compressed bit stream information that transmits of received code device and stream information respectively in real time, the real-time Transmission module link to each other with data segmentation module with the transmission data after cutting apart real-time stream information and feedback information, the non real-time transport module links to each other with data segmentation module to transmit and increases matter stream information and patch stream information, and the real-time Transmission module is connected with IP network respectively with the non real-time transport module and carries out real-time stream information, feedback information, increase the transmission of matter stream information and patch stream information to receiving terminal.
Described receiving terminal comprises: feedback module, receiving terminal buffer memory, Fusion Module and decoder, wherein: decoder is connected with transmitting realtime stream information and the code stream information after merging with the receiving terminal buffer memory respectively with Fusion Module, feedback module is connected with IP network with the receiving terminal buffer memory respectively and sends feedback information to transmitting terminal with transmitting realtime stream information and by IP network, and Fusion Module is connected with IP network in addition and increases matter stream information and patch stream information with what transmit that transmitting terminal sends.
Described encoder is finished the frame of input or the compressed encoding of field, and compressed code flow is used for transmission and storage through NAL (network self-adapting layer).
The compressed bit stream that described data segmentation module received code device transmits also is divided into three parts, and a part is real-time stream information, and used for real-time Transmission, a part is for increasing the matter stream information, and is used for generating high quality graphic; Data segmentation module is extracted from the real-time stream information of buffer memory according to the feedback information that receives and is generated the patch stream information simultaneously.
Described real-time Transmission module adopts the transmission of RTP/UDP/IP protocol stack by the real-time stream information that data segmentation module obtains, and is sent to receiving terminal through transmission network, satisfies the requirement of real-time transmission.
Described non real-time transport module adopts RTP/TCP/IP protocol stack or FTP/TCP/IP protocol stack, to increasing the matter stream information and the patch stream information carries out reliable transmission.This module also can be carried out local cache to this two-way stream earlier, adopts RTP/TCP/IP agreement or FTP/TCP/IP protocol transmission when channel idle again.
The code stream that described feedback module reception transmission network transmits is also sent into the reception buffer memory, sends into video decoder decodes again and shows.Receive after the code stream process parsing in the buffer memory, continuity according to the packet header sequence number, the statistics packet drop, and according to RTCP (RTCP Real-time Transport Control Protocol) agreement generation feedback RTCP bag, inform that by transmission network which bag of transmitting terminal loses, become the patch stream information and resend so that extract the inclusion of losing at transmitting terminal.
Described Fusion Module to the real-time stream information received, increase the sequence of operations that merges, reorders of matter stream information and patch stream information, generate one road complete code stream.
Code stream after described decoder is combined is decoded, and specifically can be divided into two parts: decode to real-time stream information (1), obtains the high real-time image of low quality, uses for monitoring in real time.Owing to packet loss is arranged in the transmission course, so the Error concealment techniques of this partial decoding of h in need utilizing H.264, just can be correctly decoded.(2) to increase matter stream information, patch stream information and before receive code stream after real-time stream information behind the packet loss carries out mixing operation arranged, decode, obtain high quality graphic, for have access to afterwards.Wherein, reordering need be according to the serial number in the RTP header.
The present invention relates to the transmission method of above-mentioned multi-stream information transmission system, may further comprise the steps:
Step 1, H.264 or the mixed code approach among the MPEG-4 based on, by encoder with the information frame of input or information field frame by frame in or inter prediction encoding be that unit carries out encoding process with the macro block, generate compressed bit stream; Specifically may further comprise the steps:
1.1 adopt infra-frame prediction or inter prediction that original video stream is carried out waveform coding;
1.2 the data behind the waveform coding are carried out transition coding;
1.3 the data of the transform domain after the transition coding are quantized;
Obtain final compressed bit stream 1.4 the data after quantizing are carried out entropy coding, be used for Network Transmission.
Step 2 is divided into compressed bit stream real-time stream information and increases the matter stream information by DP or SVC mode;
Described DP mode is meant: choose data and cut apart pattern when H.264 encoding, obtain A, B, the C class packet of compressed bit stream.
Described SVC mode is meant: adopt coded system H.264/SVC to carry out the coding of original video stream, obtain the gradable encoding code stream information of multilayer, comprise basic layer and enhanced layer information.
Described real-time stream information comprises: the A+B class packet that the data that adopt the DP mode to obtain are cut apart; The code stream that perhaps adopts basic layer bit stream that the SVC mode obtains and part enhancement layer bitstream to form;
The described matter stream information that increases comprises: the C class packet that the data that adopt the DP mode to obtain are cut apart; The perhaps code stream formed of the part enhancement layer bitstream that obtains of SVC mode;
Step 3 for the real-time stream information that step 2 obtains, adopts the RTP/UDP/IP agreement to transmit to receiving terminal from transmitting terminal, and transmission is carried out local cache to real-time stream information simultaneously, and concrete steps comprise:
3.1 the subpackage rule according to the RFC3894 definition is carried out subpackage to compressed bit stream;
3.2 add packet header according to the packing principle of the RFC3894 definition unit after to subpackage, be packaged into the RTP packet;
3.3 add header fields according to udp protocol at the RTP packet, be packaged into the UDP message bag;
3.4 adopt IP protocol transmission UDP message bag.
Step 4, receiving terminal generates feedback information according to the real-time stream information that receives, and concrete steps comprise:
4.1, determine the packet packet header sequence number of losing according to the continuity of the packet header sequence number of the real-time stream information that receives;
4.2 forming feedback information, the packet packet header sequence number that will lose passes through the RTCP/IP protocol transmission to transmitting terminal.
Step 5, transmitting terminal are received the feedback information that receiving terminal is beamed back, and obtain the serial number of the bag that basic stream loses, and the bag of from the real-time stream information of buffer memory transmission being lost in view of the above extracts, and synthesize one road patch stream information.The transmission tolerable high latency of patch stream information, but need errorless transmission.Therefore adopt the transmission of RTP/TCP/IP protocol stack.
After step 6, receiving terminal receive the video code flow that channel transmits, adopt based on the code stream decoding of decoder to receiving of technology H.264, decoder carries out real-time decoding to the real-time stream information data that receive; The patch stream information that receives, the real-time stream information that increases matter stream information and buffer memory are merged, reorder, obtain video image.
The present invention has following effect: data segmentation module of the present invention is divided into three parts with data, and a part real-time stream information important, that guarantee the primary image quality adopts real-time Transmission; Second portion increases matter stream information and third part patch stream information, can send and adopt reliable host-host protocol such as TCP/IP in channel idle.After receiving terminal is received itself and the real-time stream information of receiving are synthesized, decode.So both can satisfy the needs of safety monitoring live preview monitoring, can obtain the required high quality graphic of post-survey evidence obtaining again,, effectively improve the utilance of channel, reduce the probability of network congestion packet loss simultaneously by timesharing and differentiation transmission.
The present invention compared with prior art can well satisfy the real-time and the high-quality requirement of video monitoring system simultaneously, can satisfy the demand of real-time monitoring by the reconstruction video of real-time stream information decoding, the reconstruction video that code stream decoding obtains after merging can satisfy the demand of investigation and evidence collection, and the monitor mode on traditional commercial Application or can only satisfy the real-time demand, or can only satisfy the high-quality demand;
The storage pressure of transmitting terminal of the present invention is little, and transmitting terminal only needs the real-time stream information behind the memory encoding, and without compressive flow information all behind the memory encoding, has significantly reduced the storage pressure of transmitting terminal;
The present invention investigates and collects evidence conveniently, can satisfy the different business demand of receiving terminal according to channel situation with real-time stream information with increase the matter stream information and be sent to receiving terminal in different ways, has made things convenient for the investigation and evidence collection of receiving terminal.Under transmitting terminal and receiving terminal physical distance situation far away, the transmission method of native system is more advanced and effective.
Description of drawings
Fig. 1 is the invention process schematic diagram.
Embodiment
Below embodiments of the invention are elaborated, present embodiment is being to implement under the prerequisite with the technical solution of the present invention, provided detailed execution mode and concrete operating process, but protection scope of the present invention is not limited to following embodiment.
As shown in Figure 1, present embodiment comprises: transmitting terminal and the receiving terminal that is connected by channel.
Described transmitting terminal comprises: encoder, data segmentation module, the transmitting terminal buffer memory, real-time Transmission module and non real-time transport module, wherein: encoder links to each other with data segmentation module with the transmission compressed bit stream, data segmentation module is connected with the transmitting terminal buffer memory with encoder respectively and the compressed bit stream information that transmits of received code device and stream information respectively in real time, the real-time Transmission module link to each other with data segmentation module with the transmission data after cutting apart real-time stream information and feedback information, the non real-time transport module links to each other with data segmentation module to transmit and increases matter stream information and patch stream information, and the real-time Transmission module is connected with IP network respectively with the non real-time transport module and carries out real-time stream information, feedback information, increase the transmission of matter stream information and patch stream information to receiving terminal.
Described receiving terminal comprises: feedback module, receiving terminal buffer memory, Fusion Module and decoder, wherein: decoder is connected with transmitting realtime stream information and the code stream information after merging with the receiving terminal buffer memory respectively with Fusion Module, feedback module is connected with IP network with the receiving terminal buffer memory respectively and sends feedback information to transmitting terminal with transmitting realtime stream information and by IP network, and Fusion Module is connected with IP network in addition and increases matter stream information and patch stream information with what transmit that transmitting terminal sends.
Described encoder is finished the frame of input or the compressed encoding of field, and compressed code flow is used for transmission and storage through NAL (network self-adapting layer).
The compressed bit stream that described data segmentation module received code device transmits also is divided into three parts, and a part is real-time stream information, and used for real-time Transmission, a part is for increasing the matter stream information, and is used for generating high quality graphic; Data segmentation module is extracted from the real-time stream information of buffer memory according to the feedback information that receives and is generated the patch stream information simultaneously.
Described real-time Transmission module adopts the transmission of RTP/UDP/IP protocol stack by the real-time stream information that data segmentation module obtains, and is sent to receiving terminal through transmission network, satisfies the requirement of real-time transmission.
Described non real-time transport module adopts RTP/TCP/IP protocol stack or FTP/TCP/IP protocol stack, to increasing the matter stream information and the patch stream information carries out reliable transmission.This module also can be carried out local cache to this two-way stream earlier, adopts RTP/TCP/IP agreement or FTP/TCP/IP protocol transmission when channel idle again.
The code stream that described feedback module reception transmission network transmits is also sent into the reception buffer memory, sends into video decoder decodes again and shows.Receive after the code stream process parsing in the buffer memory, continuity according to the packet header sequence number, the statistics packet drop, and according to RTCP (RTCP Real-time Transport Control Protocol) agreement generation feedback RTCP bag, inform that by transmission network which bag of transmitting terminal loses, become the patch stream information and resend so that extract the inclusion of losing at transmitting terminal.
Described Fusion Module to the real-time stream information received, increase the sequence of operations that merges, reorders of matter stream information and patch stream information, generate one road complete code stream.
Code stream after described decoder is combined is decoded, and specifically can be divided into two parts: decode to real-time stream information (1), obtains the high real-time image of low quality, uses for monitoring in real time.Owing to packet loss is arranged in the transmission course, so the Error concealment techniques of this partial decoding of h in need utilizing H.264, just can be correctly decoded.(2) to increase matter stream information, patch stream information and before receive code stream after real-time stream information behind the packet loss carries out mixing operation arranged, decode, obtain high quality graphic, for have access to afterwards.Wherein, reordering need be according to the serial number in the RTP header.
Present embodiment transmits by following concrete steps:
Step 1, based on hybrid coding method H.264/SVC, adopt the coded reference software JSVM of SVC, with the input information frame or information field frame by frame in or inter prediction encoding be that unit carries out encoding process with the macro block, and adopting the SVC mode to generate the scalable compressed code stream, this compressed bit stream comprises the multilayer code stream information.In this embodiment, adopt the coding parameter of table 1:
The coding parameter of this embodiment of table 1 is selected
| Parameter name | Numerical value |
| Video encoding standard | H.264/SVC |
| The encoding and decoding reference software | JSVM8.9 |
| Coding mode | SVC |
| The coding frame per second | 25 frame/seconds |
| IntraPeriod | 16 |
| GOP | 8 |
Step 2: extract compressed bit stream, generate real-time stream information and increase the matter stream information.
The basic layer and the part enhanced layer information of the scalable compressed code stream that extraction step one generates are formed real-time stream information;
The back code stream is extracted the remaining enhanced layer information composition in back increase the matter stream information.
Step 3 for the real-time stream information that step 2 obtains, adopts the RTP/UDP/IP agreement to transmit to receiving terminal from transmitting terminal, and transmission is carried out local cache to real-time stream information simultaneously.
Concrete steps comprise:
Subpackage rule according to the RFC3894 definition is carried out subpackage to compressed bit stream;
Add packet header according to the packing principle of the RFC3894 definition unit after to subpackage, be packaged into the RTP packet;
Add header fields according to udp protocol at the RTP packet, be packaged into the UDP message bag;
Adopt IP protocol transmission UDP message bag.
Step 4, receiving terminal generates feedback information according to the real-time stream information that receives, and concrete steps comprise:
According to the continuity of the packet header sequence number of the real-time stream information that receives, determine the packet packet header sequence number of losing;
The packet packet header sequence number that to lose is formed feedback information and is passed through the RTCP/IP protocol transmission to transmitting terminal.
Step 5, transmitting terminal is received the feedback information that receiving terminal is beamed back, and obtain the serial number of the bag that basic stream loses, and the bag of from the real-time stream information of buffer memory transmission being lost in view of the above extracts, synthesize one road patch stream information, this adopts the transmission of RTP/TCP/IP protocol stack.
After step 6, receiving terminal receive the video code flow that channel transmits, adopt based on the code stream decoding of JSVM decoder to receiving, decoder specifically is divided into two parts:
The real-time stream information data that receive are carried out real-time decoding, obtain low quality but the image of high real-time, for monitoring in real time.
The patch stream information that receives, the real-time stream information that increases matter stream information and buffer memory are merged, reorder, obtain decoding again behind the video flowing complete, no packet loss, obtain high quality graphic, use for the post-survey evidence obtaining.Wherein, reordering need be according to the serial number in the RTP header.
Table 2 has represented to adopt the comparison of the test result of test result that present embodiment obtains and conventional method.In table 2, " stream information is rebuild in real time " expression adopts the real-time stream information transmission decoding of this method to obtain reconstruction video, the reconstruction video that obtains behind the information fusion of the Fusion Module of the multichannel code stream process decoding end of " multithread reconstruction " expression employing this method, the decoder decode, " tradition is rebuild " is meant the reconstruction video that adopts traditional coding, transmission, decoding process to obtain." PSNR " (PeakSignal to Noise Ratio) is a kind of objective standard of evaluation map picture, and it can reflect quality of reconstructed images preferably.Its value is big more, and the presentation video quality is good more, otherwise then the presentation video quality is poor more.
The reconstruction video PSNR that adopts " in real time stream information rebuild " of present embodiment to obtain as can be seen from Table 2 is approaching with " tradition is rebuild " PSNR, and the expression present embodiment can satisfy the real-time demand of video monitoring.And the reconstruction video PSNR that obtains of " multithread reconstruction " is more a lot of greatly than the PSNR of " tradition is rebuild ", shows that present embodiment can satisfy the high-quality requirement of video monitoring.
The test result of table 2 this method and conventional method relatively
| Reconstruction mode | Stream information is rebuild in real time | Multithread is rebuild | Tradition is rebuild |
| PSNR | 22.14dB | 33.90dB | 24.26dB |
Claims (8)
1. a multi-stream information transmission system is characterized in that: comprising: transmitting terminal and the receiving terminal that is connected by channel;
Described transmitting terminal comprises: encoder, data segmentation module, the transmitting terminal buffer memory, real-time Transmission module and non real-time transport module, wherein: encoder links to each other with data segmentation module with the transmission compressed bit stream, data segmentation module is connected with the transmitting terminal buffer memory with encoder respectively and the compressed bit stream information that transmits of received code device and stream information respectively in real time, the real-time Transmission module links to each other with data segmentation module to transmit real-time stream information and the feedback information after data are cut apart, the non real-time transport module links to each other with data segmentation module to transmit and increases matter stream information and patch stream information, and the real-time Transmission module is connected with IP network respectively with the non real-time transport module and carries out real-time stream information, feedback information, increase the transmission of matter stream information and patch stream information to receiving terminal;
Described receiving terminal comprises: feedback module, receiving terminal buffer memory, Fusion Module and decoder, wherein: decoder is connected with transmitting realtime stream information and the code stream information after merging with the receiving terminal buffer memory respectively with Fusion Module, feedback module is connected with IP network with the receiving terminal buffer memory respectively and sends feedback information to transmitting terminal with transmitting realtime stream information and by IP network, and Fusion Module is connected with IP network in addition and increases matter stream information and patch stream information with what transmit that transmitting terminal sends;
The compressed bit stream that described data segmentation module received code device transmits also is divided into three parts, and a part is real-time stream information, for real-time Transmission used; A part is for increasing the matter stream information, and is used for generating high quality graphic; Data segmentation module is extracted from the real-time stream information of buffer memory according to the feedback information that receives and is generated the patch stream information simultaneously;
Described real-time stream information comprises: the A+B class packet that the data that adopt the DP mode to obtain are cut apart; The code stream that perhaps adopts basic layer bit stream that the SVC mode obtains and part enhancement layer bitstream to form;
The described matter stream information that increases comprises: the C class packet that the data that adopt the DP mode to obtain are cut apart; The perhaps code stream formed of the part enhancement layer bitstream that obtains of SVC mode;
Described DP mode is meant: choose data and cut apart pattern when H.264 encoding, obtain A, B, the C class packet of compressed bit stream;
Described SVC mode is meant: adopt coded system H.264/SVC to carry out the coding of original video stream, obtain the gradable encoding code stream information of multilayer, comprise basic layer and enhanced layer information.
2. multi-stream information transmission system according to claim 1 is characterized in that, described real-time Transmission module adopts the transmission of RTP/UDP/IP protocol stack by the real-time stream information that data segmentation module obtains, and is sent to receiving terminal through transmission network.
3. multi-stream information transmission system according to claim 1 is characterized in that, described non real-time transport module adopts RTP/TCP/IP protocol stack or FTP/TCP/IP protocol stack, to increasing the matter stream information and the patch stream information carries out reliable transmission.
4. multi-stream information transmission system according to claim 1 is characterized in that, the code stream that described feedback module reception transmission network transmits is also sent into the reception buffer memory, sends into video decoder decodes again and shows.
5. the transmission method of a multi-stream information transmission system according to claim 1 is characterized in that, may further comprise the steps:
Step 1, H.264 or the mixed code approach among the MPEG-4 based on, by encoder with the information frame of input or information field frame by frame in or inter prediction encoding be that unit carries out encoding process with the macro block, generate compressed bit stream;
Step 2 is divided into compressed bit stream real-time stream information and increases the matter stream information by DP or SVC mode;
Step 3 for the real-time stream information that step 2 obtains, adopts the RTP/UDP/IP agreement to transmit to receiving terminal from transmitting terminal, and transmission is carried out local cache to real-time stream information simultaneously,
Step 4, receiving terminal generates feedback information according to the real-time stream information that receives;
Step 5, transmitting terminal are received the feedback information that receiving terminal is beamed back, and obtain the serial number of the bag that basic stream loses, and the bag of from the real-time stream information of buffer memory transmission being lost in view of the above extracts, and synthesize one road patch stream information;
After step 6, receiving terminal receive the video code flow that channel transmits, adopt based on the code stream decoding of decoder to receiving of technology H.264, decoder carries out real-time decoding to the real-time stream information data that receive; The patch stream information that receives, the real-time stream information that increases matter stream information and buffer memory are merged, reorder, obtain video image.
6. the transmission method of multi-stream information transmission system according to claim 5 is characterized in that, described step 1 specifically comprises:
1.1 adopt infra-frame prediction or inter prediction that original video stream is carried out waveform coding;
1.2 the data behind the waveform coding are carried out transition coding;
1.3 the data of the transform domain after the transition coding are quantized;
Obtain final compressed bit stream 1.4 the data after quantizing are carried out entropy coding, be used for Network Transmission.
7. the transmission method of multi-stream information transmission system according to claim 5 is characterized in that, described step 3 specifically comprises:
3.1 the subpackage rule according to the RFC3894 definition is carried out subpackage to compressed bit stream;
3.2 add packet header according to the packing principle of the RFC3894 definition unit after to subpackage, be packaged into the RTP packet;
3.3 add header fields according to udp protocol at the RTP packet, be packaged into the UDP message bag;
3.4 adopt IP protocol transmission UDP message bag.
8. the transmission method of multi-stream information transmission system according to claim 5 is characterized in that, described step 4 specifically comprises:
4.1, determine the packet packet header sequence number of losing according to the continuity of the packet header sequence number of the real-time stream information that receives;
4.2 forming feedback information, the packet packet header sequence number that will lose passes through the RTCP/IP protocol transmission to transmitting terminal.
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| CN102075514B (en) * | 2010-11-19 | 2013-07-31 | 王恒 | Audio transmission method for DSPPA network |
| CN102739723A (en) * | 2011-04-16 | 2012-10-17 | 镇江佳得信息技术有限公司 | Method and system for rapidly exchanging electronic business cards |
| CN102291468A (en) * | 2011-09-19 | 2011-12-21 | 郑州单点科技软件有限公司 | Method and system for realizing data exchange |
| CN103313054B (en) * | 2013-05-22 | 2016-05-04 | 中国科学院声学研究所 | The transmission dispatching method of scalable video SVC video |
| CN104506792B (en) * | 2014-12-03 | 2018-06-22 | 关健 | A kind of people and the method for pet video communication |
| CN104869358A (en) * | 2015-05-19 | 2015-08-26 | 重庆大学 | Construction method for safety monitoring system |
| US11115623B2 (en) * | 2018-05-07 | 2021-09-07 | Maxim Integrated Products, Inc. | Systems and methods for asymmetric image splitter with line mark memory |
| CN110943972A (en) * | 2019-10-30 | 2020-03-31 | 西安万像电子科技有限公司 | Data processing method and device |
| CN113037685B (en) * | 2019-12-24 | 2022-08-30 | 中国移动通信集团四川有限公司 | Data transmission method and electronic equipment |
| CN111131785A (en) * | 2019-12-30 | 2020-05-08 | 元力(天津)科技有限公司 | MPEG-4 video transmission system based on DirectShow |
| CN113364814B (en) * | 2021-08-10 | 2021-11-30 | 北京翔东智能科技有限公司 | Anti-weak network transmission method based on RTP |
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| CN1455591A (en) * | 2002-04-30 | 2003-11-12 | 电子科技大学 | Video/data broadcasting co-channel multi-flow transparent transmitting method |
| CN1848186A (en) * | 2005-04-05 | 2006-10-18 | 北京国通创安信息技术有限公司 | Video-frequency networking monitoring alarm and video networking monitoring system |
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| CN1455591A (en) * | 2002-04-30 | 2003-11-12 | 电子科技大学 | Video/data broadcasting co-channel multi-flow transparent transmitting method |
| CN1848186A (en) * | 2005-04-05 | 2006-10-18 | 北京国通创安信息技术有限公司 | Video-frequency networking monitoring alarm and video networking monitoring system |
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