Title :
A layered DCT coder for Internet video
Author :
Amir, Elan ; McCanne, Steven ; Vetterli, Martin
Author_Institution :
California Univ., Berkeley, CA, USA
Abstract :
Several compression schemes for Internet video utilize block-based conditional replenishment (CR) where block updates are coded independently of the past. In the current Internet video tools, blocks are compressed with a single-layer representation. We propose a new approach that compresses image blocks using a layered representation. Our layered-DCT (LDCT) compression algorithm, derived from progressive JPEG, has been combined with CR and optimized for efficient software implementation to provide an improved solution for Internet packet video. Although LDCT is constrained to a layered representation, its compression performance is as good or better than the single layer Intra-H.261 and baseline JPEG coding schemes
Keywords :
Internet; block codes; data compression; discrete cosine transforms; image representation; packet switching; transform coding; video codecs; video coding; Internet packet video; LDCT; baseline JPEG coding; block based conditional replenishment; block updates; codec; compression performance; layered DCT coder; layered-DCT compression algorithm; progressive JPEG; single layer intraH.261 coding; single-layer representation; software implementation; video compression; Ambient intelligence; Block codes; Chromium; Discrete cosine transforms; Image coding; Internet; Streaming media; Transform coding; Video compression; Videoconference;
Conference_Titel :
Image Processing, 1996. Proceedings., International Conference on
Conference_Location :
Lausanne
Print_ISBN :
0-7803-3259-8
DOI :
10.1109/ICIP.1996.559421
