Title:
CODING DEVICE AND METHOD, AND DECODING DEVICE AND METHOD, AND RECORDED MEDIUM
Document Type and Number:
WIPO Patent Application WO2000018127
Kind Code:
A9
Abstract:
Since the edge portion is disadvantageous in terms of the amount of information in normal coding, conventionally the distortion due to quantization increases when normal coding is performed. A coding device of the invention comprises a blocking section which divides image data into blocks, an amount-of-data calculating section which calculates the amount of information on the coding of the blocked image data, a pixel exchanging section which exchanges pixels between a block for which the amount of information is calculated by the amount-of-information calculating section and an arbitrary block, a controller which compares the amount of information of the block for which a pixel is exchanged by the pixel exchanging section with the amount of information of the block before the pixel exchange and determines a block to be sent to a quantizing section according to the results of the comparison, the quantizing section which subjects the block sent from the pixel exchanging section to ADRC quantization, and a multiplexing section which adds additional information to ADRC-quantized data from the quantizing section.
Inventors:
KONDO TETSUJIRO (JP)
HORISHI TAKASHI (JP)
HORISHI TAKASHI (JP)
Application Number:
PCT/JP1999/005168
Publication Date:
June 29, 2000
Filing Date:
September 21, 1999
Export Citation:
Assignee:
SONY CORP (JP)
KONDO TETSUJIRO (JP)
HORISHI TAKASHI (JP)
KONDO TETSUJIRO (JP)
HORISHI TAKASHI (JP)
International Classes:
G06T9/00; H04N19/14; H04N19/119; H04N19/149; H04N19/176; H04N19/423; H04N19/46; H04N19/60; H04N19/70; H04N19/85; H04N19/98; (IPC1-7): H04N7/26
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