| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a two-dimensional inverse discrete cosine conversion circuit which can shorten a two-dimensional inverse discrete cosine conversion process time without varying a circuit scale. SOLUTION: This circuit is equipped with an input switching circuit 12 which selectively switches and outputs input data and data after linear inverse discrete cosine conversion, an input switching control circuit 17 which controls the operation of the input switching circuit 12, a linear inverse discrete cosine conversion circuit 13 which performs linear inverse discrete cosine conversion for the input data, and a data distributing circuit 18 which switches and controls the output destination of the output data. The input switching control circuit 17 controls the input switching circuit 12 so that the input data and data in a previous block are outputted alternately without any break, and the data distributing circuit 18 switches the output destination of the output data in timing delayed by the internal processing time of the linear inverse discrete cosine conversion circuit 13 on the basis of the timing of the switching of the input switching circuit 12 by the input switching control circuit 17.</p> |
