| 摘要 |
<p>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.</p> |
