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. 01, 1999
Filed:
Sep. 13, 1996
Kyminh Liang, Logan, UT (US);
Chien-Min Huang, Logan, UT (US);
Paul D Israelsen, North Logan, UT (US);
Scott E Budge, Logan, UT (US);
Utah State University, Logan, UT (US);
Abstract
The invention relates to a method and system for allocating bits for representing blocks that are transmitted in an image compression system. In a preferred embodiment, a video telephone communications system includes a video transmitting/receiving (transceiving) system including local and remote processing systems separated by a communications link. The local processing system determines indices to be sent to a remote processing system to represent the image. Under one aspect of the invention, the local processing system determines an optimal bit allocation in which the following relationship may be minimized DR=D+.lambda.R, where D is the total distortion .SIGMA.d.sub.i for a frame; .lambda. is a value determined as described below; R=.SIGMA.r.sub.i .apprxeq.R.sub.d which is the desired total number of bits for the frame. The optimal bit allocation may determine .lambda. for an entire frame. Under other aspects of the invention a lambda feedback technique, with or without predecision, may be used. The lambda feedback techniques may determine .lambda. block by block. Conditional update preselection and mode preselection are other reduced complexity procedures.