Quantizer Noise Equalization Between Electro-Optical Transfer Functions
2016 PICTURE CODING SYMPOSIUM (PCS)(2016)
摘要
We consider the problem of equalizing the quantization noise between two video encoders operating with video stored using different transfer function. Here, a transfer function is the mapping between linear light and the quantized code words and includes, for example, the well-known "gamma curve" used for most video applications. Our motivation for studying this problem is that the solution enables the direct conversation of a quantization strategy developed for a legacy, standard dynamic range transfer function to be easily mapped to a quantization strategy for a new, high dynamic range transfer function. This is especially timely given the beginning deployment of high dynamic range services throughout the world that use the BT-2020/SMPTE ST 2084 transfer function and not the BT.709/BT.1886 transfer function historically employed for coding high definition digital video. The paper derives a model for the needed relationship. Results show the benefit of the approach.
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关键词
quantizer noise equalization,electrooptical transfer functions,video encoders,quantized code words,gamma curve,standard dynamic range transfer function,BT-2020-SMPTE ST 2084 transfer function,BT.709-BT.1886 function,high definition digital video
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