Inverse Bit Plane Decoding Order for Turbo Code Based Distributed Video Coding

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 for the sequences, which can only be decoded with a coding efficiency lower than H.264/AVC intra. For sequences with reliable side information, the coding efficiency is unchanged. 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 ...

• Type: Conference
• Year: 2007
• Where: ICIP
• Authors: Jörn Ostermann, Sven Klomp, Yuri Vatis
• Keywords: Bit Plane, Coding Efficiency, Conventional Decoding Order, ICIP 2007, Image Processing, Plane Decoding Order, Turbo Decoding Loops