| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for realizing efficient run length encoding by shortening a run length in the scanning of a DCT coefficient block. SOLUTION: The block of a transformation coefficient is divided into plural sub blocks and whether or not at least one non-zero value is present inside the respective sub blocks is judged. By detecting 104 a sub block array composed of the sub blocks provided with the non-zero value, scanning the entire transformation coefficients present inside the non-zero blocks by a predetermined scanning sequence and performing the run length encoding 113, run length encoded signals are generated. |
