Methods and apparatus for bit depth scalable video encoding and decoding utilizing tone mapping and inverse tone mapping

Abstract

Methods and apparatus are provided for bit depth scalable video encoding and decoding utilizing tone mapping and inverse tone mapping. An apparatus includes an encoder (100) for encoding picture data for at least a portion of a picture by generating an inter-layer residue prediction for the portion using a tone mapping function and an inverse tone mapping function. The tone mapping function and the inverse tone mapping function perform a conversion of the inter-layer residue prediction from a residue domain to a pixel domain for bit depth scalability while maintaining a same bit depth representation.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of US Provisional Application Serial No. 61 / 151,569, filed February 11, 2009, which is hereby incorporated by reference in its entirety. technical field [0003] The present principles relate generally to video encoding and decoding, and more particularly to methods and apparatus for bit-depth scalable video encoding and decoding using tone mapping and inverse tone mapping. Background technique [0004] Recently, digital images / videos with greater than eight bit depths are increasingly desirable in many application areas such as, for example, medical image processing, digital cinema workflows in production and post-production, home theater related applications, and the like. Bit depth scalability is potentially useful considering the fact that traditional 8 bit depth digital imaging systems and high bit depth digital imaging systems will co-exist for some time to come. There are sev...

AI Technical Summary

Problems solved by technology

The first prior art solution is inherently non-compliant with the International Organization for Standardization / International Electrotechnical Commission (ISO / IEC) Moving Picture Experts Group-4 (MPEG-4) Part 10 Advanced Video Coding (AVC) standard / ITU Telecommunication 8-bit profile of the subdivision (ITU-T) H.264 Recommendation (hereinafter "MPEG-4 AVC standard")

The second state-of-the-art solution complies with all current standards but requires more overhead

A fourth prior art method transforms the inverse tone mapping problem from the residual domain to the pixel domain for inter-layer residual prediction

For example, the third prior art method cannot handle different bit depths in enhancement and base layers due to lack of tonemapping and inverse tonemapping operations

Furthermore, the fourth prior art method introduces quantization error

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