Journal of Jishou University(Natural Sciences Edition)

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Offset Rotation Mapping Algorithm Based on String Matching for Screen Content Coding

LIN Tao,YANG Yufen   

  1. (1.College of Electronics and Information Engineering,Tongji University,Shanghai 200092,China;2.Institute of VLSI,Tongji University,Shanghai 200092,China)
  • Online:2019-05-25 Published:2019-06-04


According to the statistical characteristics of the encoding parameter offset using string matching to code the computer screen content and Webpage Content,an offset rotation mapping algorithm based on string matching (ORMSM) for screen content coding is proposed.It is implemented on the basis of LZ4HC.The algorithm mainly consists of an offset rotation mapping range from 1 and w and a special position search of image width for the offset parameter.Compared with SMHPLC,PNG and HEVC (x265) algorithms,experimental results show that the proposed algorithm has obvious advantages of high performance and ultra-low coding complexity.

Key words: string matching, lossless compression, content coding, offset parameter, rotation mapping, special position search

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