TVP5146 PDC and VPS APPLICATION NOTE

PDC (Program Delivery Control) is a signal intended for controlling VCRs. It is used only with the PAL standard, and it is received as part of WST (World Standard Teletext). PDC is used to control VCR recording by informing a PDC-equipped VCR when a particular program starts and ends. VPS (Video Program System) is an earlier scheme for controlling VCR recording. VPS is used only with the PAL standard, and it is received during line 16 of the VBI (Vertical Blanking Interval). In this application note, signals which model actual PDC and VPS signals are inserted into the VBI of a PAL composite video signal which is input to the TVP5146 Video Decoder. The VBI slicer data filter feature is used to extract only the desired PDC data packets. Complete register settings are presented, as well as C source code for programming the device and extracting the PDC and VPS data using status polling.