SDR BIT DEPTH ENHANCEMENT VIA CODEWORD RANGE AMPLIFICATION IN A CODEC WITH INVERSE DISPLAY MANAGEMENT

摘要

Novel methods and systems for encoding standard dynamic range video to improve the final quality after converting standard dynamic range video into enhanced dynamic range video are disclosed. A dual layer codec structure that amplifies certain codeword ranges can be used to send enhanced information to the decoder in order to achieve an enhanced (higher bit depth) image signal. The enhanced standard dynamic range signal can then be up-converted to enhanced dynamic range video without banding artifacts in the areas corresponding to those certain codeword ranges.