using preemphasis of the signal before modulation and deemphasis of the signal after demodulation

Full Title

Details of television systems (scanning details or combination thereof with generation of supply voltages H04N3/00) > Television signal recording > Television signal processing therefor > Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback > using preemphasis of the signal before modulation and deemphasis of the signal after demodulation