Thursday, April 17, 2014

Yves Faroudja's Pre-processor Improves Video Compression Efficiency

EETimes: Yves Faroudja presents a layered way to improve the video compression efficiency at NAB. He adds a new pre-processor layer, prior to a standard encoder such as H.264, HEVC, or MPEG 2, and post-processor (after compression decoding). "We take an image and simplify it; and that simplified image goes through the regular [standards-based] compression process," Faroudja explains. "But we never throw away information." This additional information is inserted in what Faroudja calls a "support layer." This compresses signals not used in Faroudja's so-called simplified image. Together with the decompressed simplified image, the support layer helps reconstruct the original image in full resolution and at 35-50% reduced bit rate at the same quality.

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