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Improved signal reconstruction and return channel suppression in Distributed Video Coding systems
 

Summary: Improved signal reconstruction and return channel suppression in
Distributed Video Coding systems
Xavi Artigas 1
, Luis Torres 1
1
Universitat Politècnica de Catalunya (UPC), Department of Signal Theory & Communications
Campus Nord, D-5. Jordi Girona 1-3, 08034 Barcelona
E-mail: {xavi, luis}@gps.tsc.upc.edu
Abstract - Distributed Video Coding (DVC) is a coding paradigm that gives the decoder the task to exploit the
source statistics to achieve efficient compression. Current approaches to DVC rely on motion-compensated
interpolation to generate at the decoder an estimation of the frame being decoded. This paper presents an
iterative motion-compensated interpolation technique that takes advantage of all available information about the
frame being estimated, not only the previous and posterior frames as is common practice. Simulation results
show that the addition of this estimation technique to an existing DVC codec produces a 0.15 dB improvement in
the PSNR of the rate-distortion plots. Furthermore, a method to avoid using the return channel existing in some
DVC implementations is presented that only incurs in a penalty of 10 to 100 kbit/s.
Keywords ­ Distributed Video Coding, Wyner-Ziv Coding, Motion-Compensated Temporal Interpolation,
Iterative Motion Compensation, Return Channel Suppression.
1. INTRODUCTION
Video coding has traditionally allocated most of

  

Source: Artigas, Xavier - Departament de Teoria del Senyal i Comunicacions, Universitat Politècnica de Catalunya

 

Collections: Engineering; Computer Technologies and Information Sciences