Low Complexity Hybrid Rate Control Schemes for Distributed Video Coding

Distributed video coding is a video paradigm where most of the computational complexity can be transfered from video encoders to the decoders. This allows for video sequences transmission involving inexpensive encoders and powerful central decoders. Unfortunately, due to typically numerous feedback requests and needed decoder run cycles, this often leads to unacceptably long decoding latencies. One approach to addressing the latency problem consists in estimating an initial number of parity bit chunks (INC) that are then sent at once to reduce the number of these decoders run cycles. The challenge is to properly estimate as accurately as possible the INC without neither underestimation nor overestimation. This paper proposes two INC estimation techniques based on the temporal correlation between successive Wyner-Ziv frames and on the correlation between the different bit-planes.