Pulse or digital communications – Bandwidth reduction or expansion
Reexamination Certificate
2006-09-19
2006-09-19
An, Shawn S. (Department: 2621)
Pulse or digital communications
Bandwidth reduction or expansion
C375S240240, C375S240130, C375S240260, C375S240020, C382S236000, C382S238000, C382S239000
Reexamination Certificate
active
07110450
ABSTRACT:
Deterioration of picture quality is prevented even in a transmission environment in which errors easily occur. A block significance determining section produces block significance for each block as an encoding unit according to predetermined evaluation indices. A map generator generates a refresh map signal representing priority of refresh processing for each block according to the block significance. An adaptive refresh signal generator generates a refresh signal by referring to the refresh priority indicated by the refresh map signal and an allowed block count of blocks for the refresh processing. A moving picture encoding section conducts an intra-frame encoding operation for a block specified by the refresh signal and appropriately selects and executes an intra-frame encoding operation or inter-frame forecast encoding operation for blocks not specified by the refresh signal.
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“Adaptive Intra-Refresh”, International Organisation for Standardisation Organisation Internationale de Normalisation, ISO/IEC JTC1/SC29/WG11, Coding of Moving Pictures and Audio, ISO/IEC 14496-2, Committee Draft, Tokyo, Mar. 1998, pp. i-xii and 13-244.
An Shawn S.
Dickstein & Shapiro LLP
NEC Corporation
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