vertical blanking pulse sentence in Hindi

Examples

1. Most consumer VCRs use the known black level of the vertical blanking pulse to set their recording levels.
2. Most VCR circuits use the amplitude of the vertical blanking pulse to operate the AGC . Video copy control schemes such as Macrovision exploit this, inserting spikes in the pulse which will be ignored by most television sets, but cause a VCR's AGC to overcorrect and corrupt the recording.