摘要 |
<P>PROBLEM TO BE SOLVED: To provide an image decoding apparatus and a decoding program that are capable of smooth reproduction in multiple speed reproduction without increasing a required memory capacity. <P>SOLUTION: An image decoding apparatus comprises: a decoding section to which an encoded stream subjected to predictive encoding is input and that decodes each picture of the encoded stream while referencing reference images to output decoded data; and a control section that controls decoding of the decoding section, and performs memory management of a memory section with storage areas of four frames storing the reference images of two frames, the decoded data from the decoding section, and the decoded data to be used for display, and that causes the decoding section to decode a number of pictures corresponding to a speed multiplying number in one frame period in multiple speed reproduction, and exchanges stored data among the storage areas of four frames so that the decoded data to be used for the display in multiple speed reproduction is held in the storage areas. <P>COPYRIGHT: (C)2012,JPO&INPIT |