Digital Encoding Applied to Sign Language Video


IEICE TRANSACTIONS on Information and Systems   Vol.E89-D   No.6   pp.1893-1900
Publication Date: 2006/06/01
Online ISSN: 1745-1361
DOI: 10.1093/ietisy/e89-d.6.1893
Print ISSN: 0916-8532
Type of Manuscript: Special Section PAPER (Special Section on Human Communication II)
Category: Service and System
sign language,  quality evaluation,  picture encoding,  assistive technology,  

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We report a specially designed encoding technique for sign language video sequences supposing that the technique is for sign telecommunication such as that using mobile videophones with a low bitrate. The technique is composed of three methods: gradient coding, precedence macroblock coding, and not-coded coding. These methods are based on the idea to distribute a certain number of bits for each macroblock according to the evaluation of importance of parts of the picture. They were implemented on a computer and encoded data of a short clip of sign language dialogue was evaluated by deaf subjects. As a result, the efficiency of the technique was confirmed.