DENSIFYING TECHNIQUE OF VIDEOTAPE FOR INTERFERING AUTOMATIC GAIN COMPENSATION (AGC) OF VIDEOCORDER

DENSIFYING TECHNIQUE OF VIDEOTAPE FOR INTERFERING AUTOMATIC GAIN COMPENSATION (AGC) OF VIDEOCORDER

  • CN 1,009,240 B
  • Filed: 11/11/1988
  • Issued: 08/15/1990
  • Est. Priority Date: 11/11/1988
  • Status: Active Grant
First Claim
Patent Images

1. , upsets the magnetic tape enciphering method of video tape recorder automatic gain compensation function, when making video tape recorder program band, on the horizontal blanking back porch of luminance signal, add the disturbing pulse signal, it is characterized in that, blanking level is reduced by 0.1 volt, and add the wide line synchronizing signal of a microsecond at the horizontal blanking back porch, add disturbing pulse thereafter again.

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