H - Electricity – 04 – N
Patent
H - Electricity
04
N
H04N 7/28 (2006.01) G06T 9/00 (2006.01) H04N 7/30 (2006.01)
Patent
CA 2292820
A method and an apparatus for coding a moving image, capable of obtaining high image quality and high rate of data compression, are provided. A recording medium for recording a program of such coding is also provided. The method according to the invention comprises the steps of comparing current-image pixel block B to be coded and preceding-image pixel block within a predetermined region R of the preceding frame, seeking a specific preceding-image pixel block F minimizing matching error between pixel block B and pixel block F, and, if the matching error exceeds an acceptable value, obtaining one or more orthogonal base systems for approximating AC component vector in current-image pixel block B by inter-frame adaptive orthogonal transformation having, as nest thereof, the preceding image data within predetermined region N including pixel block F, and coding thereby the image data. If the matching error does not exceed the acceptable value, current-image pixel block B is coded based on moving vector <M> indicating specific preceding-image pixel block F.
Itagaki Fumihiko
Kawashima Miyuki
Miura Takashi
Hudson Soft Co. Ltd.
Smart & Biggar
LandOfFree
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