Theoretical analysis of video recording

Video recording on magnetic media is investigated by means of a computer simulation of the magnetic recording process. The study is based on a newly developed model of magnetic recording, which is used in this case to simulate the recording of full video signals coded in the color-under mode. The calculations are based on three consumer systems, namely, VHS, S-VHS, and 8-mm video. Computed data are used to elucidate video recording in general and to perform quantitative comparisons with corresponding experimental results. For each of the three systems, RF output, chrominance output, luminance output, and amplitude strengths of intermodulations are evaluated as a function of the deep gap writing field strength. The merits and drawbacks of changes in different media data are analyzed theoretically for S-VHS