Abstract: An automatic tracking system includes an analog/digital converter for converting an envelope signal detected by scanning a track during reproduction into a digitized envelope signal; a first track center detecting part for processing the entire track as a block and determining a track center value for the track using the digitized envelope signal; a part track center detecting part for dividing the track into a plurality of minute blocks, summing digital data of the digitized envelope signal corresponding to each of the minute blocks to produce sum data for each minute block, and determining a track center value for each minute block using the sum data for each minute block; and a final track center detecting part for determining a new track center value by using the track center values output from the first track center detecting circuit and the part track center detecting part.

Abstract: A video signal recording and reproducing apparatus for a digital video cassette tape recorder by which it is possible to judge the transmission amount of the digital data inputted from a digital source, the type of the video tape, and whether or not the tape is recorded in accordance with the judgment result, for thus automatically controlling a recording mode and a reproducing mode, which includes a tape type detector for judging a tape type in accordance with a recordable wavelength of the video tape on which a digital signal is recorded; a data rate detector for detecting and judging a data transfer rate of a digital signal, and a controller for varying a recording or reproducing speed in accordance with the judged tape type and the data transfer rate of the digital signal.

Abstract: An improved video signal recording and reproducing apparatus for a digital video cassette tape recorder by which it is possible to divide, record and reproduce a digital video signal on a low density video tape into multiple tracks based on the amount of data recordable on one track of a high density video tape by controlling a recording/reproducing speed and a tape running speed in accordance with a judgement of the type of the video tape having a predetermined recordable wavelength. The apparatus includes a detector for detecting the type of the video tape in accordance with a recordable wavelength of the video tape, a judgement section for judging the type of the tape by receiving a detected tape type signal from the detector, and a controller for controlling a recording and reproducing speed in accordance with the judged tape type.

Abstract: An apparatus and a method for discriminating between analog and digital video signals in a high definition VCR are disclosed.

Abstract: This invention relates to automatic tracking devices of digital VCRs which is provided to have a capability of precise control of the tracking by detecting rate of error due to variation of tracking of a rotating head.