Improving The Robustness of The MPEG4 Wavelet Transform Image Coder

This paper proposes schemes to improve the robustness of the ISO/IEC JTC1 Recommended MPEG-4 still image (wavelet) coder, particularly for operation in wireless mobile environments. Combined source and channel coding is used to selectively protect error sensitive bits in the encoded bitstream. The proposed schemes emphasise on protecting the integrity of DC coefficients that contain more than 90% of the image energy. The employed schemes in this study ensure that the system can operate in random error prone environments of BER up to 10.