WAVELET-BASED VIDEO CODEC USING HUMAN VISUAL SYSTEM COEFFICIENTS FOR 3G MOBILES (ThuAmPO1)

Author(s) : Akbar Sheikh Akbari (University of Strathclyde, UK) Pooneh Bagheri Zadeh (Glasgow Caledonian University, UK) Ednea Cocharan (Glasgow Caledonian University, UK) John Soraghan (University of Strathclyde, UK)

Abstract : A new wavelet based video codec that uses human vis-ual system coefficients is presented. In INTRA mode of op-eration, wavelet transform is used to split the input frame into a number of subbands. Human Visual system coeffi-cients are designed for handheld videophone devices and used to regulate the quantization step-size in the pixel quan-tization of the high frequency subbands’ coefficients. The quantized coefficients are coded using quadtree-coding scheme. In the INTER mode of operation, the displaced frame difference is generated and a wavelet transform decor-relates it into a number of subbands. These subbands are coded using adaptive vector quantization scheme. Results indicate a significant improvement in frame quality com-pared to motion JPEG2000.

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