Huffman coding equipment and Huffman coded manner

摘要

PURPOSE:To heighten the compression ratio of a Huffamn code for original image data as keeping picture quality in Huffman encoding. CONSTITUTION:A zero counter part 2 counts the amount of data '0' supplied from a zero data detecting part 1, and supplies a count result to an encoder part 3 and a block completion detecting part 5 as zero run length. The zero run length set as a reference of cutoff of data in advance is set on a zero run length setting part 4 as a reference value. The block completion detecting part 5 compares the zero run length supplied from the zero counter part 2 with the reference value set on the zero run length setting part 4, and supplies a block completion signal to the encoder part 3 when the zero run length exceeds the reference value.