MAGNETIC RECORDING PLAYBACK UNIT

MAGNETIC RECORDING PLAYBACK UNIT

  • CN 1,008,310 B
  • Filed: 05/30/1985
  • Issued: 06/06/1990
  • Est. Priority Date: 05/30/1985
  • Status: Active Grant
First Claim
Patent Images

1. A kind of magnetic recording replay apparatus, for carrying out the helical scanning type magnetic recording replay device of special playback such as fast speed playback, rewinding playback, still frame, microinching playback, it is characterized in that, in the video tape recorder of helical scan type, have 3 video heads of device on the head drum circumference, and, detect the wave detector of this magnetic head output level with the amplifier that the output of magnetic head is amplified;

  • The comparer of the output power-level detector of more adjacent 2 magnetic heads, and from comparative result, to export the converter of input modulator corresponding to the magnetic head of big level, in the converter action, circuit according to magnetic head direction control chroma demodulator, a said head output and a reference level are compared, and luminance level is remained on certain value by this fiducial value, meanwhile, during this luminance level keeps, add horizontal-drive signal, thereby can when retrieving at a high speed, carry out image interpretation.

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