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. 16, 1998
Filed:
Sep. 01, 1995
Xiaonong Ran, Cupertino, CA (US);
National Semiconductor Corporation, Santa Clara, CA (US);
Abstract
A communication system and protocol uses retransmission techniques for video transmission on mobile/wireless channels. The system partitions frames of a moving image into frame segments, and combines a sequence of frame segments to form a sub-sequence of the moving image. The sub-sequences are treated as separate images which are separately encoded and transmitted to a receiver and then are combined to reassemble the moving image. A sender transmits to the receiver data packets, each data packet representing all or part of a digital code for a frame segment. The receiver requests retransmission of data packets containing detectable errors, indicates in a status buffer which digital codes have been received and whether the digital codes are intra or inter codes, and displays a frame only after all required data packets have been received without detectable errors. The segmented frames limit occasional failures to accurately retransmit data to individual sub-sequences, so that the failure to accurately transmit data is compensated for by subsequent transmission an intra coded digital code for a frame segment.