| 摘要 |
<p>PURPOSE: To improve the coding speed by finishing discrimination when a significant coefficient is detected at first and terminating coding of linear data series when the position for coding reaches a position at which the discrimination is finished. CONSTITUTION: At first counters 42, 43, a coder 44 and a discrimination device 45 are initialized. Then control signals ctrl, ctrl2 are asserted to start the coder 44 and the discrimination device 45. The coder 44 codes the received coefficient depending on a valid bit number and the discrimination device 45 discriminates whether the received coefficient is a significant coefficient or a non-significant coefficient. Then when the signal val is not asserted, a controller 46 continues the processing and the controller 46 stops the operation of the discrimination device 45 when asserted. Furthermore, the controller 46 checks whether or not addresses adr1 and adr2 are equal to each other and when not equal, the coder 44 codes the received coefficient, and when equal, the coding processing unit 44 is stopped to terminate the entire processing.</p> |
