Macroblock level intrarefresh technique for encoded video

Details Macroblock level intrarefresh technique for encoded video Macroblock level intrarefresh technique for encoded video

2006-01-17

2006-01-17

An, Shawn S. (Department: 2613)

Pulse or digital communications

Bandwidth reduction or expansion

C375S240240, C375S240130, C375S240080, C382S236000, C382S243000, C382S248000, C348S699000

Reexamination Certificate

active

06987805

ABSTRACT:
A method is provided for encoding K>1 sequentially presented video pictures. Each of the K pictures is divided into an m>1 row×n>1 column array of non-overlapping coding units of equal sizes. Each coding unit occupies a respective coding unit position in the picture from which it was divided. An arbitrary, pseudo random pattern of coding units is selected for refreshing during each of the K pictures. Each pattern selected during any given one of the K pictures includes a sequence of one or more coding units of the array. In addition, the pixels of each coding unit selected for refreshing during a kthpicture occupy different pixel positions than each coding unit selected for refreshing during a preceding one of the 1stto (k−1)thpictures of the K pictures. Furthermore, each pixel position of a moving picture image formed from the K pictures is selected for refreshing once over the sequence of K pictures.A system for encoding includes a source of the K pictures and an intra/inter decision circuit for selecting the coding units for refreshing over the sequence of K frames. The method or system produces an encoded signal which can be stored on a storage medium. A method and system for decoding the encoded signal is also provided.

REFERENCES:
patent: 5719628 (1998-02-01), Ohki
patent: 6574277 (2003-06-01), Miyamoto

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