Joint Source-channel Coding with Power Control for Video Transmission over Wireless Systems
نویسندگان
چکیده
In this paper, a joint source-channel coding with power control technique is proposed that will minimize the average end-to-end distortion amongst all users, subject to a constraint on the total bit rate used for source and channel coding. Each user in the system is arbitrarily assigned either a low-motion or a high-motion video sequence to transmit. To reduce the computational complexity of the solution, Universal Rate-Distortion Characteristics (URDC) are obtained experimentally to show the effect channel errors have on source coding using the MPEG4 codec. The URDCs are used in conjunction with channel characteristic plots obtained by using Rate-Compatible Punctured Convolutional (RCPC) codes for channel coding to optimally select an appropriate source coding rate, channel coding rate, and power level for each user in the system.
منابع مشابه
Joint power control and source-channel coding for video communication over wireless networks
Video communication over wireless link is a challenging task due to the time-varying characteristics of a wireless channel and limited battery resource in the handheld devices. This paper proposes a power-optimized approach for video communication, which simultaneously controls the transmission power, source rate and error protection level to minimize the total power consumption for all users. ...
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