The Perceptually Quality Enhancement Strategy of Mobile Transmission System via the Watermark Channel Indexing and HVS-based Bit Allocation Technology

In this paper, a smart strategy of quality enhancement and control for wireless multimedia communication is proposed. Via hiding the watermark information into each subband of the original media, channel condition can be estimated at the mobile terminal by simple watermark parity check. Once the channel condition of each frequency subband is known, the dynamic bit allocation strategy is adopted accordingly by human visual sensitivity property to ensure the best quality of the multimedia contents service under a fixed bit rate transmission constraint. The simulation results show that the strategy utilizes the proposed channel detection and bit allocation strategy between source and channel coding, not only better visual quality but also more efficient transmission can be achieved, while the media security requirement can be maintained at the same time without increasing much computational complexity at the mobile terminal