Overview: .. YCrCb or RGB to NTSC/PAL Digital Video Encoder
The Bt856/7 is designed specifically for video systems requiring the generation of 525-line (NTSC/PAL–M) or 625-line (PAL–B, D, G, H, I, N, N-Argentina) posite or Y/C (S-video) signals. The Bt856 and Bt857 are functionally identical, with the exception that Bt857 can output the Macrovision anticopy algorithm. Horizontal sync (HSYNC*) and vertical sync (VSYNC*) may be configured as inputs (slave mode) or outputs (master mode). BLANK* is an input and may be externally controlled. 24-bit linear or gamma-corrected RGB data or 4:2:2 YCrCb data may be input. The rise and fall times of sync, the burst envelope, and closed caption data are internally controlled. Analog luminance (Y) and chrominance (C) information is available on the Y and C outputs for interfacing to S-video equipment. The posite analog video signal is output simultaneously onto two analog outputs. This allows one output to provide baseband posite video and another output to drive an RF modulator. Analog RGB is available to support the European SCART/PeriTV interface.
