This paper proposes a high-efficiency coding algorithm realization of a 64 kbit/s video coding equipment. An adaptive tree-search vector quantization is described in which the size of a code book can be varied according to the local property of an image. The improvement of the coding efficiency due to this idea is demonstrated by a computer simulation compared with a conventional system with a fixed size code book. A 64 kbit/s video-coding system having the resolution of 384 (horizontal) × 240 (vertical) pixels per frame was constructed. Using the coding system with the proposed algorithm, a temporal resolution of 5 to 7.5 frames/s was obtained, confirming the satisfactory results for practical applications such as video conferencing and videophones.
|Number of pages||10|
|Journal||Electronics and Communications in Japan, Part I: Communications (English translation of Denshi Tsushin Gakkai Ronbunshi)|
|Publication status||Published - 1989 Sep|
ASJC Scopus subject areas
- Computer Networks and Communications
- Electrical and Electronic Engineering