| 摘要 |
A number of tables based on condition series, such as "0 run, value" or "size", are formed by repeatedly executing operation in which quantization coarseness of a quantizer is controlled by supplying total code length data obtained in Huffman code processing to the quantizer. When coefficient data is coded by using these tables, a table corresponding to a size of coefficient data provided before that coefficient data is selected and the coefficient data is coded on the basis of the selected table, thereby making it possible to suppress the total code length to be short. The coding apparatus includes a Huffman table generating apparatus, a transform circuit (2), a quantizer (3), and a variable length coder (4) having a memory (4a) which stores therein tables provided for every condition series. <IMAGE> |
