Rate and Decoding Power Constrained Video Coding Scheme for Mobile Multimedia Players (WA-P6)

Author(s) : Ligang Lu (IBM Watson Research Center, USA) Vadim Sheinin (IBM Watson Research Center, USA)

Abstract : Power dissipation, data rate, and processing time are crucial constraining parameters for embedded multimedia devices. In this paper we present a video coding solution given the constraints of bit rate and decoding power dissipation. Coupled with a small dedicated video internal memory at a decoder, the coding scheme is designed for the best rate-distortion and decoding power cost trade off. It can substantially decrease the amount of data traffic to the external memory at the decoder. A decrease in data traffic to the external memory at decoder will result in multiple benefits: faster real-time processing and power savings. The encoder, given the prior knowledge of the decoder’s dedicated video internal memory management scheme, optimally regulates its choice of motion compensated predictors to reduce the decoder’s external memory accesses. This video coding scheme can be used in any standard or proprietary encoder to generate a compliant output stream decodable by a standard general purpose processor-based or dedicated hardware-based decoder with power restriction. Simulation results show that with a relatively small dedicated internal memory, our scheme may reduce the power dissipation by more than 50% while keeping the comparable picture quality.

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