Quantization processes for residue differential pulse code modulation
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United States of America Patent
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Jan 23, 2018
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Mar 16, 2015
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Mar 17, 2014
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Abstract
In an example, system and method for coding encoded video data. A quantized residue differences block associated with a current block of a picture is generated and a reconstructed prediction residue for each quantized residue difference in the block of quantized residue differences is generated. Each reconstructed prediction residue is added to its corresponding original prediction value to produce a current block of a picture. Generating the reconstructed prediction residue includes performing inverse quantization on blocks of quantized residue differences, wherein the inverse quantization reconstructs data to which uniform quantization residue differential pulse code modulation (RDPCM) has been applied and wherein the quantization is of the form:
- where Q is quantization step and α is quantization offset.
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