摘要：This paper focuses on image transmission over wireless networks and propose an efficient system to minimize the overall processing-and transmission energy consumption given the expected end-to end distortion constraint. In the proposed system, an image is first encoded as a scalable bit stream with multiple quality layers that is optimal in the rate-distortion (RD) sense. Given the estimated channel condition, the characteristics of the image content, and the distortion constraint, the proposed system can adaptively determine the number of layers to be transmitted and adjust the source coding rate, the source level error resilience scheme, the channel coding rate for each layer through the proposed low-complexity joint source channel coding and power control algorithm. The advantages of the proposed system lie in three aspects: adaptivity, optimality and low complexity.
