Coded-data decoding/playback apparatus

A coded-data decoding/playback apparatus comprising:

• an image input means for inputting compressed image data;
• an image decoding means for decoding blocks containing intra-coded data which can be independently decoded and which is included in the compressed image data inputted by said image input means in response to placement of said image decoding means in a trick play mode in which image data is played back at a high speed;
• an image storage means for storing decoded image data about said blocks decoded by said image decoding means;
• and
• an image decoding/playback control means for placing said image decoding means and said image storage means in the trick play mode so as to superimpose the decoded image data about said blocks on one another, to make said image storage means store the superimposed decoded image data, and to make said image storage means output the decoded image data about said blocks stored in said image storage means at a playback speed which is specified thereby.