文章基本信息

标题：適応的算術符号を用いたテレビ速報用文字画像の圧縮と参議院選挙報道への応用
本地全文：下载
作者：久下哲郎
期刊名称：映像情報メディア学会誌
印刷版ISSN：1342-6907
电子版ISSN：1881-6908
出版年度：1999
卷号：53
期号：4
页码：565-572
DOI：10.3169/itej.53.565
出版社：The Institute of Image Information and Television Engineers
摘要：A new method of character image compression, for use in a system for the prompt reporting of election results on broadcast TV, has been developed. It compresses character images without information loss using adaptive arithmetic coding and 2-D spatial resolution conversion. The encoder draws kanji characters onto an oversized bitmap domain and compresses this using adaptive arithmetic coding. The decoder converts the image from binary to grayscale at a reduced spatial resolution appropriate for TV broadcasting. The method has been adopted for KINDS, a system for the prompt reporting of election results on NHK TV, and was applied to the election of the House of Councillors on 12 July 1998. The characteristics of the method are discussed in relation to the context length of the coding and the nonstationarity of the images using the actual results of the election.
关键词：MacOS;エントロピー符号化;適応的;算術符号;空間解像度変換;選挙報道