Video Recording with New Signal Processing

Video recording systems such as VTRs generally use an emphasis method in signal processing to reduce noise generated in FM recording and reproduction, using a pre-emphasis circuit and a de-emphasis circuit. In recording, the high frequency components of the video signal are emphasized by the pre-emphasis circuit and, in reproduction, the emphasized components are suppressed by exactly the same amount by the de-emphasis circuit; this is very effective in reducing the FM noise, especially its high frequency components.