Decoder with dynamic range compensation
AssigneeSharp Laboratories of America, Inc.
InventorsLouis Joseph Kerofsky, Christopher A. Segall, Kiran Misra
Life of this patent
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Abstract
A system for decoding video including receiving quantized coefficients representative of a block of video representative of a plurality of pixels and dequantizing the quantized coefficients. The system inverse transform the dequantized coefficients using a first one dimensional inverse transform and a second one dimensional inverse transform to determine a decoded residue where the result of the first one-dimensional inverse transform are shifted different amounts using a shifting process based upon the magnitude of the dequantized coefficients.
Claims7
A method for decoding video comprising:
- (a) receiving quantized coefficients representative of a block of video representative of a plurality of pixels;
- (b) dequantizing said quantized coefficients to generate dequantized coefficients having a first bit depth being transform coefficients;
- (c) subsequent to said dequantizing inverse transforming said dequantized coefficients said being transform coefficients having said first bit depth using a first one dimensional inverse transform to a result having a second bit depth and subsequently inverse transforming said result having a third bit depth using a second one dimensional inverse transform to determine a decoded residue having a fourth bit depth;
- (d) wherein said result of said first one-dimensional inverse transform having said second bit depth are shifted different amounts having said second bit depth to said third bit depth different than said second bit depth using a shifting process based upon the magnitude of said dequantized coefficients and a transform size parameter.
Dependencies are inferred from the claim text.