A New Method of Joint Source Channel Coding Based on SPIHT
Xiao Jie Song · Chinese Journal of Computers · 2003
Reliable transmission of multimedia services over wireless channel is the key problem for 3G mobile communication. This paper proposes a joint source channel coding scheme based on SPIHT used to transmit progressive image over wireless channel. The method provides unequal protection for SPIHT bit stream with different importance, and adaptively adjusts the source and channel coding rates according to the time varying characteristic of wireless channel, thus yields good performance and high reliability without adding extra bandwidth. Simulations in Rayleigh and Gilbert Elliot channel show that the scheme can obviously improve the image quality compared to EEP and UEP scheme proposed previously, especially when the channel is in bad condition. So the scheme can be applied to fluctuant channel with large range.