Encoding and decoding apparatus and method for reducing...

Details Encoding and decoding apparatus and method for reducing... Encoding and decoding apparatus and method for reducing...

2006-03-27

2010-06-15

Chen, Wenpeng (Department: 2624)

Image analysis

Image compression or coding

Adaptive coding

Reexamination Certificate

active

07738716

ABSTRACT:
Provided is an encoding method capable of reducing a blocking phenomenon that occurs when moving-images are encoded and decoded. The method includes: performing a first encoding operation on an input image using a first quantization coefficient; generating a reconstructed image of the encoded image; calculating a difference between corresponding partial images of the reconstructed image and the input image; and performing a second encoding operation on the calculated difference using a second quantization coefficient smaller than the first quantization coefficient. Using the second encoded difference, a decoding unit can reconstruct an image of a block boundary portion more elaborately with a small number of bits, thereby significantly reducing the blocking phenomenon in the decoding operation.

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