Improved signal reconstruction and return channel suppression in distributed video coding systems

Abstract

Distributed Video Coding (DVC) is a codingpmadigm that gives the decoder the task to exploit the source slatistics to achieve eficient compression. Current approaches to D VC rely on mo tion-compensated interpolation to generate at the decoder an estimation of the f?me being decoded. This paper presents an iterative motion-compensated interpolation technique that takes advantage of all available information about the pame being estimated, not only the previous and posterior james as is common practice. Simulation results show that the addition of this estimation technique to an existing DYC codecproduces a 0.15 dB improvement in the PSNR of the rate-distortion plots. Furthermore, U method to avoid ming the return channel existing in some D VC implementations is presented that only incurs in a penalty of IO to IO0 bit/!.