CN101834854B - Video transmission system of mobile phone - Google Patents
Video transmission system of mobile phone Download PDFInfo
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- CN101834854B CN101834854B CN201010141347.XA CN201010141347A CN101834854B CN 101834854 B CN101834854 B CN 101834854B CN 201010141347 A CN201010141347 A CN 201010141347A CN 101834854 B CN101834854 B CN 101834854B
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Abstract
The invention relates to a video transmission system of a mobile phone and belongs to the technical field of mobile phone communication. The system comprises two smart mobile phones and a PC serving as a service terminal. The network connection among the mobile phones and the PC adopts a TCP/IP protocol; and the PC serving as a middle transcode server receives information of a transmitting terminal mobile phone, and transcodes and transmits the transcoded information to a receiving terminal mobile phone. When encoding at the transmitting terminal, the video transmission system adopts distributed video coding and transcodes through the middle transcode server; and the video transmission system performs simple MPEG or H.26x decoding at the receiving terminal. Both the two smart mobile phones are Windows Mobile operation systems; and the client adopts DirectShow technology as a basic frame tool for capturing, processing and playing back video stream. The video transmission system combines the advantages of the traditional video encoding and the distributed video coding and can simply encode and decode at an equipment terminal.
Description
Technical field
The invention belongs to the technical field of mobile communication, be specifically related to a kind of video transmission system of mobile phone.
Background technology
Distributed video coding (Distributed Video Coding) is a kind of Video coding mode of novelty, and is on the contrary with traditional Video coding, calculates the characteristics of calculation of complex when simply decoding when it has coding.It is the successful Application of distributed source coding (Distributed Source Coding) on Video coding.When coding, a video is divided into a plurality of information sources (as video being divided into odd-numbered frame sequence and even frame sequence) artificially, each information source is carried out absolute coding, that is: distributed source coding.And carry out combined coding in when decoding, that is: when decoding, utilize the correlation that exists between these two information sources.Hence one can see that, and the code encoding/decoding mode of this novelty does not use the correlation of (interframe) between information source when coding, also just do not carry out complicated estimation.And in traditional Video coding mode (MPEG, H.26x), an important step when estimation is coding, also be wherein to calculate the most complicated step, amount of calculation can account for (the list of references: C.Zhu more than 80% of whole cataloged procedure, W.-S.Qi, and W.Ser, " Predictive fine granularitysuccessive elimination for fast optimal blockmatching motion estimation; " IEEETrans.Image Proces., vol.14, pp.213-221,2005.); Then do not need to carry out estimation when decoding, its advantage is decoded simply exactly.
For the mobile video transmission, two terminal equipments are this small-sized portable sets of mobile phone.Their computing capability is limited, and the memory space of power supply is also limited, need to transmit and receive all simple coding and decoding video schemes of end when transmission of video.From the above, if just by traditional Video coding mode or just all can not realize the demand of mobile video transmission by the distributed coding mode.So, just the two advantages need to be got up, namely carry out transcoding by an intermediate server.So that transmitting terminal when coding adopted the simple distributed coding of coding, and the transcoding process (distributed video decoding and mpeg encoded) by intermediate server carries out simple mpeg decode at receiving terminal.
For this reason, we have realized a video transmission system of mobile phone based on the above coding and decoding scheme.
Summary of the invention
For the demand for mobile video transmission, satisfy that transmitting terminal and receiving terminal all carry out simple coding and decoding video when transmission of video, the present invention proposes a kind of video transmission system of mobile phone based on distributed video coding.
The technical scheme that the present invention takes is as follows: native system is comprised of smart mobile phone and a PC of two Windows Mobile operating systems.One of them smart mobile phone is as transmitting terminal, and another is as receiving terminal; PC is then as middle transcoding server.What the network connection between the three adopted is ICP/IP protocol, and application client/server mode, that is: two mobile phones are client, and PC is server end.In transmitting terminal when coding, adopted distributed video coding, and the transcoding server by the centre carries out transcoding, carries out simple MPEG or H.26x decoding at receiving terminal.PC receives the information of transmitting terminal mobile phone and carries out transcoding as the transcoding server of centre, sends at last the receiving terminal mobile phone to.Native system adopts the DirectShow technology as the basic framework instrument of seizure, processing and the playback of video flowing.
The beneficial effect that the present invention obtains is: the system that the present invention proposes combines the advantage of traditional Video coding and distributed video coding, can be implemented in device end and all carry out simple encoding and decoding, has namely realized the demand of mobile video transmission.
Description of drawings
Fig. 1 video transmission system of mobile phone schematic diagram of the present invention.
Embodiment
The present invention will be further described below in conjunction with accompanying drawing.
As shown in Figure 1, system of the present invention comprises two smart mobile phones, and one of them smart mobile phone catches video information as transmitting terminal; Another is as receiving terminal, displaying video; Add a PC between two smart mobile phones, what the wireless network between the three connected employing is ICP/IP protocol, and application client/server mode, and namely two smart mobile phones are client, and PC is server end; PC receives the information of transmitting terminal mobile phone and carries out transcoding as the transcoding server of centre, sends at last the receiving terminal mobile phone to.In transmitting terminal when coding, adopted distributed video coding, and the transcoding server by the centre carries out transcoding, carries out simple MPEG or H.26x decoding at receiving terminal.Two smart mobile phones are Windows Mobile operating system, and the present invention adopts the DirectShow technology as the basic framework instrument of seizure, processing and the playback of video flowing.DirectShow is the kit that a new generation of releasing on the basis of ActiveMovie and Video for Windows of Microsoft processes based on the Streaming Media of COM, and DirectShow provides strong support for seizure and the playback of media stream.
In the present embodiment, the transmitting terminal mobile phone adopts the O2 mobile phone, and the receiving terminal mobile phone adopts the CHT of Dopod mobile phone.The transmitting terminal mobile phone adopts the DVC encoder, and the receiving terminal mobile phone adopts H.264 decoder.PC is a notebook computer.
The below introduces and realizes operating process of the present invention:
1. install:
Patent application person exploitation can be realized distributed coding (transmitting terminal), transcoding (PC), and the software of mpeg decode (receiving terminal) function pack into two mobile phones and PC.The setup.exe that double-clicks in the Infrastructure Setup file installs infrastructure (that is: base station software), copies avcodec.dll, avformat.dll, avutil.dll under the installation directory (with the same catalogue of Infrastructure_PC.exe).VideoCap.exe is copied in the transmitting terminal mobile phone, copy VideoReceiver.exe to the receiving terminal mobile phone.Then WLAN (wireless local area network) is set:
A) notebook computer: the wireless network connection status-＞attribute-＞radio network configuration-＞adding, network name is set to CodingGroup, and " automatically providing this key for me " selected in cancellation, and it is codeg that key is set.Choose " this is that a computer is to the particular network of computer ", click and determine to finish configuration.Wireless network card IP address and default gateway are set are set to 192.168.0.1, check wireless network, selecting CodingGroup to connect (annotates: do not finish if all the other two mobile phones also arrange, connect connection failure this moment, can automatic or manual after the WiFi that waits for mobile phone arranges and finishes connects).
B) mobile phone WiFi arranges: beginning-＞arrange-＞connect-＞Wi-Fi-＞interpolations is new ...-＞network name is set to CodingGroup, and choosing this is the device-to-device connection.Click next step, it is codeg that netkey is set, and finishes.Beginning-＞arrange-＞connect-＞Wi-Fi-＞network adapter-＞select " internet of acquiescence arranges " in the drop-down list, select Wireless Adapter that the IP address is set, O2 mobile phone IP address is set to 192.168.0.2, and CHT mobile phone IP address is set to 192.168.0.3.
2. operation:
Double-click Infrastructure_PC.exe and start " base station ", click File-＞Run.Two mobile phone accesses are waited in picture blackening this moment.VideoCap.exe in the operation O2 mobile phone clicks File-＞Connect, makes the picture blackening during successful connection.", the hit OK close box.So far three equipment connections together are in state to be transmitted.
Clicking File-＞Capture in the O2 mobile phone begins video acquisition and is transferred to notebook and the CHT mobile phone.Can click File-＞Stop in the O2 mobile phone during time-out, continue operation and then can click again Capture.
3. withdraw from:
Close transmitting terminal handset program: File-＞Stop, the OK that then clicks the program lower right corner withdraws from or top-right " X " number withdraws from.
Close the receiving terminal handset program: the OK that clicks the program lower right corner withdraws from or top-right " X " number withdraws from.
Close Infrastructure_PC.exe: click File-＞Exit or program top-right " X " and number withdraw from.
This software also is applicable to general LAN.Only need mobile phone is connected to the local area network (LAN) at corresponding PC place by WiFi, the IP address when revising network connection in the handset program makes itself and current PC be in identical IP network section and gets final product.
Claims (2)
1. a video transmission system of mobile phone comprises two smart mobile phones, and one of them smart mobile phone catches video information as transmitting terminal; Another is as receiving terminal, displaying video; It is characterized in that: add a PC between two smart mobile phones, what the network connection between the three adopted is ICP/IP protocol, and application client/server mode, and namely two smart mobile phones are client, and PC is server end; Transmitting terminal adopts distributed video coding, and receiving terminal adopts MPEG or H.26x decoding, and PC receives the information of transmitting terminal mobile phone and carries out transcoding as the transcoding server of centre, sends at last the receiving terminal mobile phone to.
2. described video transmission system of mobile phone according to claim 1, it is characterized in that: two smart mobile phones are Windows Mobile operating system, and customer end adopted DirectShow technology is as the basic framework instrument of seizure, processing and the playback of video flowing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010141347.XA CN101834854B (en) | 2010-04-06 | 2010-04-06 | Video transmission system of mobile phone |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201010141347.XA CN101834854B (en) | 2010-04-06 | 2010-04-06 | Video transmission system of mobile phone |
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| CN101834854A CN101834854A (en) | 2010-09-15 |
| CN101834854B true CN101834854B (en) | 2013-04-10 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US8917608B2 (en) * | 2012-01-31 | 2014-12-23 | Qualcomm Incorporated | Low latency WiFi display using intelligent aggregation |
| CN112835651B (en) * | 2021-04-01 | 2023-10-20 | 中国空空导弹研究院 | Multipath image parallel decoding processing method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1538696A (en) * | 2003-10-24 | 2004-10-20 | 清华大学 | Multipath real time video-frequency gateway for supporting large capacity user and its application method |
| CN101207785A (en) * | 2006-12-22 | 2008-06-25 | 北京上行逶式信息公司 | Method and apparatus for implementing mobile phone network video |
| CN101389011A (en) * | 2008-10-22 | 2009-03-18 | 中兴通讯股份有限公司 | Apparatus and method for sending GPS positioning information in visible telephone service |
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| US9525851B2 (en) * | 2008-07-25 | 2016-12-20 | Time Warner Cable Enterprises Llc | System and method for sharing digital images over a content-based network |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1538696A (en) * | 2003-10-24 | 2004-10-20 | 清华大学 | Multipath real time video-frequency gateway for supporting large capacity user and its application method |
| CN101207785A (en) * | 2006-12-22 | 2008-06-25 | 北京上行逶式信息公司 | Method and apparatus for implementing mobile phone network video |
| CN101389011A (en) * | 2008-10-22 | 2009-03-18 | 中兴通讯股份有限公司 | Apparatus and method for sending GPS positioning information in visible telephone service |
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