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:
Apr. 08, 2003
Filed:
Feb. 10, 2000
KDD Corporation, Tokyo, JP;
Abstract
An input video signal is distributed to two links. The distributed video signals are coded by encoders in a spacewise or timewise shifted manner, and then, are transmitted over the transmission links. On a receiving side, the video signals are decoded by decoders, respectively. An averaging processor determines an average of the video signals per pixel, and then, outputs it. A data selector selects an output from the averaging processor when the plural links are operated normally; to the contrary, it selects a decoded output on the normal link in the case where an accident occurs in any one of the plural links. Specific methods for shifting the video signals spacewise or timewise include: a method for shifting a timing of intra-frame coding; a method for shifting the video signals on the links by several pixels or lines at least one of upward, downward, rightward and leftward; a method for disposing a sampling conversion filter in at least one of the links; and the like. According to the present invention, it is possible to provide a video transmission system using the plural links in which the transmission capacity of a backup link can be effectively used while high reliability of transmission can be ensured.