Digital video recorder for high-resolution video signals with high-resolution display in special playback modes

摘要

A digital video tape recorder records compressed image signals which include both intra-frame encoded image slices and motion compensated encoded image slices. The recorder receives the encoded data either in a format in which a portion of each frame is encoded using intra-frame techniques or in a format in which an entire frame of a group of frames is encoded using intra-frame techniques. Shuffling circuitry in the recorder recognizes the intra-frame encoded slices and reorders the slices as they are recorded such that a substantial portion of the intra-coded image slices will be recovered both in normal play mode and in trick play mode. For the one signal, these slices represent the intra-coded portion of each frame; for the other signal they represent the one intra-coded frame in the group of frames. In one embodiment of the invention, the trick-play mode is a three-times forward speed mode and the intra-coded slices are arranged such that substantially all of the intra-coded slices are recovered in trick-play mode. IMAGE