| 摘要 |
PURPOSE:To prevent the increase of code amount by removing all ZRL codes generated between a valid coefficient code and an EOB code. CONSTITUTION:A Huffman code conversion part 1 inputs a run length 11 and a category 12 and outputs a ZRL signal 13, a valid coefficient signal 14, an EOB signal 15, code data 16 and a data length 17. A processing instructing part 2 receives the ZRL signal 13, the valid coefficient signal 14 and the EOB signal 15 from the Huffman code conversion part 1 and outputs an instruction to a ZRL processing circuit 3. The ZRL processing circuit 3 receives the instruction of the processing instructing part 2 and outputs the code data from the Huffman code conversion part 1. That is, transmission is withheld until the valid coefficient signal arrives next when the ZRL code is inputted and the ZRL code is not transmitted when the EOB code arrives so that the transmission of the ZRL code preceding the EOB code is eliminated. Also, the ZRL code is generated at a ZRL code generating part 4, however, the ZRL code generated at the Huffman code conversion part 1 may be stored and used. |
