20 Apple patents issued today?? Is this iTV or ICamera patent
United States Patent Application 20130003845
Kind Code A1
Zhou; Xiaosong ; et al. January 3, 2013
ADAPTIVE CONFIGURATION OF REFERENCE FRAME BUFFER BASED ON CAMERA AND BACKGROUND MOTION
In a video coding/decoding system, reference picture caches in a video coder and decoder may be partitioned dynamically based on camera and background motion can lead to improved coding efficiency and coding quality. When a camera is fixed and therefore exhibits low motion, a system may allocate larger portions of the reference picture cache to storage of long term reference frames. In this case, foreground elements of an image (for example, a person) may move in front of a relatively fixed background. Increasing the number of long term reference frames can increase the chances that, no matter where the foreground elements are within a frame currently being coded, the reference picture cache will contain at least one frame that provides an adequate prediction match to background elements within the new frame. Thus the background elements uncovered in the current frame can be coded at high quality with a low number of bits. When a camera exhibits high motion, the system may allocate larger portions of the reference picture cache to storage of short term reference frames.
Inventors: Zhou; Xiaosong; (Campbell, CA) ; Wu; Hsi-Jung; (San Jose, CA) ; Lin; Yao-Chung; (Mountain View, CA)
Assignee: APPLE INC.
Serial No.: 175143
Series Code: 13
Filed: July 1, 2011
well I hope the other 19 are better than that one.. pretty obvious not to encode areas of video frames that arent changing, in fact all reasonable video data compression makes this bit saving assumption.. I would know as I've written such