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A Joint Source-Channel Coding Scheme Based on Unequal Error Protection of H.264

Author: ChenJiaMei
Tutor: GuoShiZeng
School: Harbin Institute of Technology
Course: Information and Communication Engineering
Keywords: H.264 Multi-rate compatible the redundancy punctured Turbo code Unequal Error Protection Joint source-channel coding
CLC: TN919.81
Type: Master's thesis
Year: 2010
Downloads: 43
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Abstract


The growing demand for multimedia applications in wireless and mobile network environment , the wireless video transmission technology has been more widely used , the video signal encoding becoming much more efficient , and radio channel has a higher throughput , which causing the video signal transmission becomes possible in the wireless channel . However, wireless networks have changed, limited bandwidth , bit error rate is relatively high , so the video coding for wireless communication method should not only have a highly efficient compression capability but should also have a good resistance to the BER performance . Joint source channel coding source encoder and channel encoder cascade up to maintain the independence between the two encoders , but jointly optimize the encoding parameter , original multimedia data and protection of data transmission between the rational allocation bandwidth , to achieve a reasonable distribution of the source and channel redundancy , thus achieving the parameters jointly optimized source and channel coding system . This can reduce the implementation complexity of the system , at the same time through between the source and channel rate allocation to achieve the purpose of the joint coding is a compromise and effective encoding . This paper studies the content is combined with H.264 compression video and radio channel characteristics , data partitioning and unequal error protection ideas proposed by the H.264 standard , the H.264 standard video segmentation , intra-frame compression , interframe compression, basic principles, to obtain a different degree of importance , the signal source of different bitrate compressed data stream, multi- bit rate compatible with redundant puncturing Turbo code is used as the channel coding , to achieve the required different bitrate channel coding for channel implementation unequal error protection lay the foundation Finally, based on the wireless channel parameters , variable bit rate H.264 video compression methods and the RCPT codes proposed joint source channel coding unequal error protection video transmission system from the adapt resource allocation algorithm , designed to change the bit rate is set according to the radio channel change adaptive joint source-channel coding system can be achieved in the case of limited channel bandwidth , reasonable allocation between the source and channel codes rate , so that the decoder side to restore the quality of the video under various channel conditions to achieve a better effect .

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CLC: > Industrial Technology > Radio electronics, telecommunications technology > Communicate > Image communication, multimedia communication > Image coding
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