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Home Image Analysis Efficient-data-structure-for-entropy-encoding-used-in-a-DWT-based-high-performance-image-compression

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 Efficient data structure for entropy encoding used in a DWT-based high performance image compression

Details
Inventors: Acharya, Tinku;
Assignee: Intel Corporation (Santa Clara, CA)
Primary Examiner: Young; Brian
Assistant Examiner:
Attorney, Agent or Firm: Blakely, Sokoloff, Taylor & Zafman LLP

What is disclosed is a method that allows a fixed length (L) codeword and flag to serve as a structure for encoding large run of identical values, a single bit capable of representing 2.sup.L such values. The zero non coding method may be utilized to efficiently encode data sets, such as images or other data files with large consecutive runs of a particular value such as zero. In an entropy encoding scheme, such enhanced zero run coding may be combined with variable length coding for non-zero values.

DETAILED DESCRIPTION A method comprising determining a number of bits L utilized to store a word R, said word R accompanied by a flag, said flag and word R comprising a structure; and encoding the length of a run of similar data values, said length larger than allowable by said L bits of the word R even if each of said L bits were fully utilized, said encoding achieved by utilizing a single bit to represent 2.
sup.
L similar data values in the run.


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