| Summary: | 碩士 === 國立交通大學 === 資訊科學與工程研究所 === 96 === In real-time video streaming systems, such as, video conferencing, peer-to-peer video streaming or IPTV, network errors frequently occur and result in degradation of video quality or failure to decode the bit-stream at the receiver. Retransmission of error packets imposes unacceptable delay of the video sequence. Multiple description coding (MDC) is an ideal approach, which generates multiple descriptors with equal importance, to overcome such problem.
In this thesis, a H.264/AVC based multiple description coding model, which splits information in spatial and frequency domain, is proposed. In the encoder, two descriptors will be generated after the first splitting in the spatial domain, and then the second splitting is done in the frequency domain for each descriptor, resulting in four descriptors in total. In the case of descriptor loss, the decoder will utilize the correlations in spatial domain and frequency domain for error concealment. The experimental results show that the proposed hybrid model has better RD performance than the existing spatial domain based MDC model.
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