DISCRIMINATION of NTSC and PAL SCHEMES
Original Publication Date: 1987-Oct-01
Included in the Prior Art Database: 2005-Feb-02
This article describes a discrimination technique for choosing between a NTSC (National Television System Committee) scheme and a PAL (Phase Alternation Line) scheme under which a television receiver is operated. The discrimination is made during a field blanking period of a composite video signal. Operational timing of an image scanning device coupled to the television receiver is selected to adapt with the NTSC or PAL scheme of the television receiver. An image scanning device, such as a video camera, is connected to a television receiver which is operated in the NTSC scheme or the PAL scheme through an adapter unit. It is necessary to adapt the operational timing of the image scanning device to the NTSC scheme or the PAL scheme. Fig. 1 shows composite video signals A and E in the NTSC scheme, and Fig.