| 摘要 |
FIELD: computerized animation of images. SUBSTANCE: coding device has key data quantizer; differential pulse-code modulation processing unit designed for multiple execution of differential pulse-code modulation processing including input of data having least dispersion among N-order data on differential pulse-code modulation; unit for erasing polar values to reduce data range by erasing polar value; and entropy coder that functions to erase bit redundancy in output data and to generate compacted and encoded stream of binary bits. Decoding device has entropy decoder, polar value recovery unit, differential pulse-code reverse modulation processing unit, and reverse quantizer. EFFECT: enhanced coding efficiency. 30 cl, 13 dwg |
