On the comparison of distributed video coding using ldpc codes on bit plane and symbol level

Many distributed video coders are implemented using sophisticated error correction codes that use soft information ( conditional probabilities) as a priori knowledge. This a priori information models the dependency behavior between the input data and side-information. In this paper we analyze both a symbol and bit plane based approach using LDPC codes. We show that a bit planebased encoder has the same performance as a symbol-based coder, if an appropriate dependency model is chosen. We argue that due to a significant complexity reduction a bit plane-based coder is preferable over a symbol based approach.