| 摘要 |
<p>PURPOSE: To avoid access contention to a frame memory by using the decoder as part of a coder and setting freely a delay time. CONSTITUTION: The decoder is provided with an output terminal LO2 used to output reference image information read from a frame memory 34 to a delay circuit 40 provided externally and an input terminal L13 used to input image information via the delay circuit 40 to be added to inversely quantized image information, a delay circuit with a fixed delay time not required for the decoder is not mounted and a change in a processing time required for quantization is processed flexibly. Furthermore, a buffer memory storing tentatively the inversely quantized image information and the reference image information is provided to adjust a write access time of the frame memory thereby avoiding contention with a read access time.</p> |
