Object-based coding and decoding apparatuses and methods for...

Image analysis – Image compression or coding – Transform coding

Reexamination Certificate

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C375S240200

Reexamination Certificate

active

09195897

ABSTRACT:
An object-based coding apparatus and method for image signals, wherein upon scanning shape-adaptive transform coefficients of an input image signal transformed in accordance with a shape-adaptive transform, only segments containing such shape-adaptive transform coefficients are scanned. In the scanning operation, segments containing no transform coefficient are skipped, thereby reducing the quantity of data being encoded. An apparatus for and a method of object-based decoding of image signals are also disclosed which can decode bit streams generated using the coding method, thereby reproducing image signals.

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Sikora et al., “Shape-adaptive DCT for generic coding of video”, IEEE Transactions , vol. 5, Issue 1, pp. 59-62, Feb. 1995.

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