Wyner-Ziv codec implementation for distributed video applications.
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Abstract
Video codecs are thought to be used in systems where codification is done once and decodification is done several number of times, this implementation requires the encoder to be 5 to 10 times more complex than the decoder [Aaron d] because of the interframe codification. A new paradigm for distributed video applications have been arising in the last few years based on the work of Aaron Wyner and Jacob Ziv. Frames are encoded in an intraframe coding scheme but decoded in an interframe scheme using an information generated at the decoder known as side information. Wyner-Ziv codec modules are designed using VHD L and synthesized for the Spartan-3A DS P Video Starter Kit, the modules were designed in pipeline so real-time execution can be performed. The hardware implementation has a maximum frequency of 64.496 MH z which is enough to process video with 1080i resolution. Lossy and lossless compression methods were employed to get the maximum compression rate so the codec can be implemented in a low bandwidth communication system.