The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 06, 1989
Filed:
Nov. 09, 1987
Yoshinori Hatori, Kawasaki, JP;
Yoichi Kato, Yokohama, JP;
Mutsumi Ohta, Tokyo, JP;
Yasuhiro Kosugi, Tokyo, JP;
Kokusai Denshin Denwa Co., Ltd., Shinjuku, JP;
Nippon Telegraph and Telephone Corporation, Chiyoda, JP;
NEC Corporation, Minato, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
A system of coding moving image signals produces a predictive error signal by a predictive coding based on inter-frame correlation and quantizing the predictive error signal for each block of a picture frame constituted by N lines of M pixels. The system includes a block coding/non-coding decision unit for calculating a first evaluation value Sm of the predictive error signal for each block of the picture frame. This unit decides that block non-coding is applicable when the first evaluation value Sm is less than a first threshold value T.sub.1 and that block coding is applicable when the first evaluation value Sm is greater than the first threshold value T.sub.1. The predictive error signal is not transmitted when the result of the decision is for block non-coding, and the predictive error signal is quantized and transmitted when the result of the decision is for block coding.