A network transmission method of video frame data based on Cauchy rs coding
A technology for video frame data and network transmission, applied in image communication, selective content distribution, electrical components, etc., can solve problems such as complex implementation, achieve easy implementation, improve data packet recovery rate, and achieve the effect of real-time recovery
Active Publication Date: 2015-11-18
ZHEJIANG UNIV
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In this way, when encoding, it is necessary to perform two operations on the source symbol, and the two operations are different operations, which will be more complicated to implement.
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[0026] The method for network transmission of video frame data based on Cauchy RS coding of the present invention will be described in detail below in conjunction with the accompanying drawings.
[0027] Such as figure 1 As shown, the video frame data network transmission method based on Cauchy RS coding, first, the video digital signal collected by the camera is encoded and compressed by the video codec standard (such as H.264) to obtain the video frame data VF n , which is packaged into a data packet sequence S through the network application layer protocol n =[s 1 the s 2 …s k ]; then to S n Do Cauchy RS encoding twice; In order to enhance the recovery rate under the continuous data packet loss environment, the present invention performs Cauchy RS encoding twice on each video frame, and multiple video frame data packet sequences and each video frame The corresponding primary verification packet sequence is diagonally interleaved, so that the data packet sequence and th...
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The invention discloses a video frame data network transmission method based on a Cauchy reed-solomon (RS) code, and the method comprises the steps of previously defining a Cauchy RS generation matrix, utilizing the Cauchy RS generation matrix to conduct twice Cauchy RS coding on each video frame, then diagonally intertwining multiple video frame data packet sequences and a primary verifying packet sequence corresponding to each video frame, and enabling the data packet sequence and the corresponding primary verifying packet sequence to be disordered; and after the diagonal intertwining, transmitting the data packet and the verifying packet to the network, after all data packets in the current video frame group are received by a receiving end of the network, restoring a lost data packet by utilizing a primary verifying packet or a secondary verifying packet, and regrouping the restored data packet and the received data packet into video data to be decoded. The video frame data network transmission method based on the Cauchy reed-solomon (RS) code is simple to operate, easy to realize and capable of high efficiently restoring the lost video frame data packet in the network transmission process.
Description
technical field [0001] The invention relates to the field of audio and video data network transmission, in particular to a video frame data network transmission method based on Cauchy RS coding. Background technique [0002] At present, many achievements have been made in the research of reliable transmission of network data at home and abroad, such as the automatic retransmission mechanism (ARQ), the forward error correction coding algorithm (FEC) without retransmission, or the realization of combining automatic retransmission and forward error correction. Mechanism, among them the realization of FEC has many kinds of methods, such as Turbo yard, Pro-MPEGCoP3 yard, Raptor yard and RS yard and so on. [0003] The automatic retransmission mechanism (ARQ) means that when the receiving end detects that a data packet is lost, it needs to send a retransmission request to the sending end, and the sending end sends the data packet that needs to be retransmitted again according to t...
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IPC IPC(8): H04N21/647H04N21/643
Inventor 蒋荣欣李洪周凡陈耀武
Owner ZHEJIANG UNIV