Image transmission over channels with bit errors and packet erasures

Abstract

We consider a hybrid mixture of an image coder for bit error channels and an image coder for packet erasure channels. The first scheme uses rate-compatible punctured convolutional (RCPC)/cyclic redundancy code (CRC) concatenated channel coding with embedded zerotree wavelet source coding, while the second technique groups trees of wavelet coefficients into fixed-length packets that provide robustness against packet erasures. We demonstrate that the hybrid image coder outperforms either of the two building block methods on certain channels that suffer both packet losses and statistically varying bit errors.