Abstract:
For turbo code based Wyner-Ziv codecs, we propose to use an inverse bit plane decoding order. The investigations have shown that the knowledge about MSB's has only a marg...View moreMetadata
Abstract:
For turbo code based Wyner-Ziv codecs, we propose to use an inverse bit plane decoding order. The investigations have shown that the knowledge about MSB's has only a marginal influence on LSB's, which can be regarded as noise, while the influence of LSB's on MSB's tends to be higher. As a results, we obtain a coding gain of up to 0.3 dB, especially for the sequences, which can only be decoded with a coding efficiency lower than H.264/AVC intra. Furthermore, the distribution of the requests for additional parity bits over the back channel is different compared to the conventional decoding order, resulting in a high number of requests for the last bit plane and a low number of requests for the other bit planes. Therefore, the decoder can request several puncturing levels for LSB's in one step, reducing the number of turbo decoding loops. Hence, transmitting the LSB's first, we can obtain a decoding speedup of 30%, thus making DVC more attractive for real-time applications.
Published in: 2007 IEEE International Conference on Image Processing
Date of Conference: 16 September 2007 - 19 October 2007
Date Added to IEEE Xplore: 12 November 2007
ISBN Information: