In order to realize a single-channel recording of HD baseband signals, a high-efficiency transmission method suitable to analog recording VCR has been examined. In this method, the transmission bandwidth is reduced by considering the redundancy of video image and the human-eye characteristics. As a result, a signal processing method, which we call BASE (Baseband adjacent-line Add-Subtract TCI Encoding Method) has been proposed. In BASE, the add and subtract signals of adjacent two lines in the same field are transmitted with a TCI form. The spectrum analysis in a two dimensional frequency area, and the effect of the transmission noise have been examined. Consequently, we can confirm the feasibility of single-channel recording of HD baseband signals by employing BASE, which can reduce the transmission bandwidth to approximately 69% with almost no picture degradation.
