Unequal Error Protection Irregular Over-Complete Mapping for Wavelet Coded Wireless Video Telephony Using Iterative Source and C

— Since the different bits of the compressed video sequence produced by the BBC’s wavelet-based video codec exhibit different error sensitivity, efficient Unequal Error Protection (UEP) schemes have to be used to ensure that the perceptually more important bits benefit from more powerful protection. Furthermore, in the context of turbo detection the over-complete mapping aided soft videobit based source decoder should also match the characteristics of the channel codes for the sake of attaining a good iterative decoding performance. In this paper, we address this design dilemma by proposing a novel Irregular Over-complete Mapping (IrOM) scheme constituted by an appropriately weighted different-rate over-complete mapping. Our turbo detection scheme has attractive iterative decoding convergence properties, while maintaining unequal error protection capabilities matched to the requirements of the wavelet encoded video sequence. An EXIT chart based design guideline is presented and u...

• Type: Conference
• Year: 2008
• Where: WCNC
• Authors: Anh Quang Pham, Lie-Liang Yang, Lajos Hanzo
• Keywords: Over-complete Mapping, Unequal Error Protection, Wavelet-based Video Codec, WCNC 2008, Wireless Networks