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US 6,445,823 B1Granted
Image compression
AssigneeTexas Instruments Incorporated
InventorJie Liang
Life of this patent
Estimating the term…
Abstract
A method of image encoding using subband decomposition followed by plus zerotree coding with a symbol replacement for significant coefficients.
Claims1
A method of encoding an image, comprising the steps of:
- (a) decomposing an image into subarrays of coefficients by lowpass and highpass filtering and subsampling;
- (b) encoding the subarrays with a zerotree coding including a symbol replacement for significant coefficients, wherein said symbol is evaluated as zero for threshold comparison but is not coded.
Dependencies are inferred from the claim text.