Apparatus and method for recording or reproducing digital data using speed information

Abstract

An apparatus and method for controlling recording and reproduction in a video cassette tape recorder are disclosed apparatus is capable of, in a recording mode, separating specific data for speed-varied reproduction from compressed digital video signals, recording them on designated tracks, recording position information of the designated tracks on a control track by an index head or recording position information of recording position-synchronized blocks at the starting portions of the designated tracks recorded with the specific data, and in a speed-varied reproduction mode, controlling a capstan servo speed so as to maintain the travel of a magnetic tape at a normal and periodically or non-periodically accelerate or decelerate it where specific data for varied-speed have been recorded periodically or non-periodically on predetermined portions of tracks, thereby making heads of travel repeatedly at the normal speed and the high speed and thereby detect continuously the specific tracks for varied-speed. A repeatibility of reproduced video at a varied speed is obtained without any deterioration in picture quality, because of recording of the specific data for speed-varied reproduction and the continuous detection of the specific data in the speed-varied reproduction.Apparatus and method for controlling recording and/or reproduction of digital signals to and/or from a digital storage medium are discussed. According to an embodiment, there is provided a method for processing a digital signal stored on a digital storage medium, comprising receiving digital data processed to prevent at least one of buffer underflow and buffer overflow and stuffed by stuffing data capable of being detected and removed, the digital data including video data in a first data format converted from video data in a second data format; determining whether a speed-----