Patent ID: 7606436
Filing Date: 2009-10-20
Classification: H04N

Abstract:
1. An image encoding apparatus for encoding an image divided into a plurality of blocks, comprising: a quantizer for quantizing data of each block according to a DCT coefficient for said each block; a quantization information generator for generating first quantization information for each block based on at least an amount of codes generated by encoding; a rounding controller for rounding the first quantization information within a set range to generate second quantization information that is smaller in amount than the first quantization information; and a selector for selecting the quantization information of an immediately preceding block as the second quantization information when a difference between the quantization information of the immediately preceding block and the first quantization information of the block currently being processed falls within a set range, and selecting the first quantization information as the second quantization information when the difference falls out of the set range.