A Reference Region Switching Scheme for Delta Modulation of Color Still Pictures

Ikuo ISHII  

IEICE TRANSACTIONS (1976-1990)   Vol.E69   No.8   pp.834-837
Publication Date: 1986/08/25
Online ISSN: 
Print ISSN: 0000-0000
Type of Manuscript: LETTER
Category: Source Encoding and Communication Terminals

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In this coding scheme for delta modulation of color still pictures, either of two reference regions is selected on a pel by pel. In comparison with fixed region scheme, average color differences can be decreased by approximately 30% in exchange for about 0.5 bit/pel overhead caused by selecting codes.