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:
Jan. 10, 1989
Filed:
Feb. 12, 1987
Fumio Sugiyama, Sagamihara, JP;
Kenshi Dachiku, Machida, JP;
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Abstract
In an image transmitting system such that an image frame is divided into plural blocks and video signals are transformed block by block in accordance with an orthogonal transform method before coding and transmission of the transform coefficients, transform coefficients are coded, only when differences in transform coefficient between the preceding frame and the current frame are significant, to reduce the coding speed and therefore the video signal transmission speed. In addition, transform coefficients are weighted under consideration of human visual characteristics (the weighting is increased with decreasing order of transform coefficient). Further, when only differences in transform coefficient are coded and transmitted, it is possible to further reduce the transmission speed.