Digital VTR

Abstract

In a digital VTR having a certain recording bit rate, within a range not higher than a remaining data rate after recording the bit stream, first HP data D 1 is recorded in first specific regions, and second HP data D 2 is recorded in second specific regions in specific tracks. In middle-speed and high-speed fast replay, the magnetic tape is transported continuously at a middle-speed or high-speed higher than the standard speed for normal replay, and the first HP data D 1 is used in common, and at a low-speed fast replay of about twice the normal speed, the speed of the magnetic tape is alternated between a speed near the standard speed for normal replay, and a speed near the low-speed fast, and at the speed near the standard speed, the second HP data disposed in the second specific regions in the specific tracks and the first HP data disposed in the first specific regions in the specific tracks are both replayed.

1 . A playback device for replaying a bit stream digitally transmitted, comprising: 
 detecting means for detecting intra-picture data in the bit stream that is replayed;    extracting means for extracting the intra-picture data from the replayed bit stream, according to the result of the detection at the detecting means;    replay mode designating means for selecting and designating one of normal replay, slow replay and still replay, as a replay mode; and    replay data outputting means for storing the extracted intra-picture data, and outputting the intra-picture data as the replay picture data, according to a mode signal output by said replay mode designating signal.    
   
   
       2 . A playback device as set forth in  claim 1 , wherein said replay data output means comprises: 
 address detecting means for detecting an address at which the intra picture data is recorded;    control means for causing normal speed replay and reversing, for reverse control, on the basis of the result of the detection of the address.    
   
   
       3 . A playback device as set forth in  claim 1 , wherein said replay data output means comprises: 
 control means for stopping the replay for a predetermined period after all the intra-picture data is extracted from the bit stream by normal speed replay.