Joint source-channel coding/decoding based on unequal error protection in space communication
Xiao Liu · Journal of the Graduate School of the Chinese Academy of Sciences · 2009
In this paper we proposed a joint source-channel coding/decoding approach based on unequal error protection in space communication since the DC coefficients are especially significant for image quality in CCSDS IDC.A reversible coding/decoding scheme was adopted for the DC coefficients for special protection,in which the output bit stream of the DC coefficients was encoded by using alternating run-length encoding and then the run-lengths were encoded by reversible variable length codes(RVLC).Meanwhile,variable length coding/decoding scheme was adopted for the AC coefficients.The experiment showed that this approach could greatly alleviate error propagation and improve the error-resilient performance of the DC coefficients,and the approach thereby could improve transmitted image quality.