Progressive Texture Video Coding

In this paper, we present a novel video coding approach which provides the functionality of fine granular bitstream scalability. The proposed progressive texture video coding scheme (PTVC) consists of two parts, the current ITU-T H.26L test model for coding macroblock mode and motion information only and a new technique for progressively coding all intra and inter texture information thus providing an embedded bitstream. It can still be decoded with moderate quality degradation in case of partial loss of the bitstream. It is therefore well suited for multicast or broadcast scenarios where time varying or different fixed bitrates shall be provided to the clients as no transcoding or multiple coding process is required

PROGRESSIVE VIDEO TRANSMISSION FOR PACKET LOSSY CHANNELS EXPLOITING FEEDBACK AND UNEQUAL ERASURE PROTECTION

In this work we present a video transmission system for packet lossy channels based on the Progressive Texture Video Coding (PTVC) algorithm. A posteriori video rate control on the progressively coded messages is simplified significantly as for rate adaptation only the later part of this message can be truncated. This property is used by an appropriate unequal erasure protection (UXP) scheme which allows – in combination with the progressively coded messages – to transmit very efficiently over packet erasure channels like the Internet. An appropriate rate allocation scheme based on dynamic programming is introduced. Additionally, a source-channel coding system exploiting network feedback is presented. Dependency on feedback delay is studied. Information between source encoder, channel encoder and network is exchanged and exploited in a cooperative way. The investigated systems show significant gains for different video sequences and different channel erasure rates when compared to sophisticated standard approaches. 1