Packetized wavelet video coding and error control forreceiver-driven layered multicast: an integrated approach

摘要

This paper proposes an integrated approach to receiver-drivenlayered multicast (RLM) based on packetized wavelet video (PWV) codingand error control. The PWV coder produces packetized layered bitstreamsthat are independent among layers while being embedded within eachlayer. Error control determines the optimal joint source-channel codingtrade-off given the available transmission rate to mitigate the effectsof packet loss. The PWV coder is designed to facilitate its integrationwith error control for RLM such that packets from different sourcelayers are generated in a rate-distortion optimized way and a lostpacket only renders the following packets in the same layer useless. Ourwork extends the single-layered approach in Chou et al., (2001).Theoretical analysis shows a gain of up to 1 dB on a channel with 20%packet loss over results presented in Chou. This gain is alsosubstantiated by our simulations with a gain of up to 2.2 dB