Method for improving rate-distortion performance of a video compression system through parallel coefficient cancellation in the transform
First Claim
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1. A method for improving rate distortion performance of a compression system through parallel coefficient cancellation in a transform comprising the steps of:
- (A) generating quantized coefficient values for each of a plurality of blocks in a macroblock;
(B) determining a block sum value for each of the plurality of blocks in said macroblock using a sum of absolute values (SAV) of respective quantized coefficient values for each of the plurality of blocks; and
(C) setting one or more of the quantized coefficient values of a block to zero in response to the block sum value of said block being less than a first predetermined threshold value.
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Abstract
A method for improving rate distortion performance of a compression system through parallel coefficient cancellation in a transform comprising the steps of (A) determining a block sum of absolute values for each of a plurality of blocks in a macroblock and (B) setting one or more coefficient values of a block to zero in response to a block sum value of said block being less than a first predetermined threshold value.
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22 Claims
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1. A method for improving rate distortion performance of a compression system through parallel coefficient cancellation in a transform comprising the steps of:
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(A) generating quantized coefficient values for each of a plurality of blocks in a macroblock; (B) determining a block sum value for each of the plurality of blocks in said macroblock using a sum of absolute values (SAV) of respective quantized coefficient values for each of the plurality of blocks; and (C) setting one or more of the quantized coefficient values of a block to zero in response to the block sum value of said block being less than a first predetermined threshold value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An apparatus comprising:
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a first circuit configured to present quantized coefficients for a plurality of blocks in a macroblock; and a second circuit configured to calculate a block sum of absolute values for each of said plurality of blocks in response to said quantized coefficients, wherein said second circuit is further configured to set one or more of said guantized coefficients of a block to zero in response to a corresponding block sum of absolute values of said block having a value less than a first predetermined threshold value. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. An apparatus comprising:
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means for presenting quantized coefficients for a plurality of blocks in a macroblock; and means for determining a block sum of absolute values for each of said plurality of blocks in response to said quantized coefficients, wherein respective quantized coefficients of each of said plurality of blocks are set to zero in response to said block sum of absolute values for each of said plurality of blocks and one or more predetermined threshold values.
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Specification