Analysis of coded bitstream of picture - Effects of calculating accuracy

Kazuo Ohzeki, Sadaharu Shimamura

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Picture coding standards have been developed and are now in position to be practically the most effective methods. However, some redundancy is found as a certain correlation for longer interval on coded bitstreams of pictures[1-5]. Entropy derived from the probability of occurrence of fixed length bit patterns in coded bitstream is investigated. A small redundancy is found for the interval with a length up to 20 bits in the tested bitstreams. Entropy for the interval with length of 30 bits on coded bitstream is difficult to be calculated because the data size exceeds available memory capacity. To reduce data size, the authors calculate entropy for sampled patterns based on an assumption that the optimum coded bitstream is a random sequence. Based on this assumption, we obtained an necessary length of coded bitstream for accuracy analysis. The analysis shows that the entropy decreases for some bitstreams, which indicates that re-encoding algorithm for bitstreams of coded picture is worth being developed.

Original languageEnglish
Title of host publication22nd Picture Coding Symposium
Pages397-400
Number of pages4
Publication statusPublished - 2001
EventProceedings of the 22nd Picture Coding Symposium: PCS-2001 - Seoul
Duration: 2001 Apr 252001 Apr 27

Other

OtherProceedings of the 22nd Picture Coding Symposium: PCS-2001
CitySeoul
Period01/4/2501/4/27

Fingerprint

Entropy
Redundancy
Data storage equipment

ASJC Scopus subject areas

  • Engineering(all)

Cite this

Ohzeki, K., & Shimamura, S. (2001). Analysis of coded bitstream of picture - Effects of calculating accuracy. In 22nd Picture Coding Symposium (pp. 397-400)

Analysis of coded bitstream of picture - Effects of calculating accuracy. / Ohzeki, Kazuo; Shimamura, Sadaharu.

22nd Picture Coding Symposium. 2001. p. 397-400.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Ohzeki, K & Shimamura, S 2001, Analysis of coded bitstream of picture - Effects of calculating accuracy. in 22nd Picture Coding Symposium. pp. 397-400, Proceedings of the 22nd Picture Coding Symposium: PCS-2001, Seoul, 01/4/25.
Ohzeki K, Shimamura S. Analysis of coded bitstream of picture - Effects of calculating accuracy. In 22nd Picture Coding Symposium. 2001. p. 397-400
Ohzeki, Kazuo ; Shimamura, Sadaharu. / Analysis of coded bitstream of picture - Effects of calculating accuracy. 22nd Picture Coding Symposium. 2001. pp. 397-400
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