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US 2008/0165857 A1Published application
Method and system for sampling video data
AssigneeFreescale Semiconductor, Inc.
InventorYong Yan
Life of this patent
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Abstract
A method and system for sampling video data uses re-sampling filters having lengths optimized relative to a quantization parameter of video processing. The method uses modeling of an optimal length of the re-sampling filter as a function of the quantization parameter to derive empirical formulas and a look up table for optimal lengths of re-sampling filters. The resulting re-sampling filters are selectively adapted for sampling video data having different bit rates.
Claims21
A method for sampling video data, comprising:
- (a) modeling an optimal length of a re-sampling filter as a function of a quantization parameter of the re-sampling filter;
- (b) deriving empirical formulas for the optimal length using results of the step (a);
- (c) producing a look up table for the optimal length using at least one of the empirical formulas;
- (d) designing a re-sampling filter having the optimal length defined using the empirical formulas or the look up table;
- and
- (e) sampling the video data using the re-sampling filter.
3 more elements
A system for sampling video data, comprising:
- a delay module for delaying the video data;
- a bit rate analyzer for determining a quantization parameter for a re-sampling filter;
- a reference module for determining an optimal length of the re-sampling filter;
- and
- the re-sampling filter adapted to the optimal length based on the bit rate of the video data.
2 more elements
Dependencies are inferred from the claim text.