HMP8156

HMP8156 August 1997 NTSC/PAL Encoder Description The HMP8156 NTSC and PAL encoder is designed for use in systems requiring the generation of high-quality NTSC and PAL video from digital image data. YCbCr or RGB digital video data drive the P0-P23 inputs. Overlay inputs are processed and the data is 2x upsampled. The Y data is optionally lowpass filtered to 5MHz and drives the Y analog output. Cb and Cr are each lowpass filtered to 1.3MHz, quadrature modulated, and summed. The result drives the C analog output. The digital Y and C data are also added together and drive the two composite analog outputs. The YCbCr data may also be converted to RGB data to drive the DACs, allowing support for the European SCART connector. The DACs can drive doubly-terminated (37.5Ω) lines, and run at a 2x oversampling rate to simplify the analog output filter requirements. Features (M) NTSC and (B, D, G, H, I, M, N, CN) PAL Operation ITU-R BT.601 and Square Pixel Operation Digital Input Formats - 4:2:2 YCbCr - 8-Bit or 16-Bit - 4:4:4 RGB - 16-Bit (5, 6, 5) or 24-Bit (8, 8, 8) - Linear or Gamma-Corrected - 8-Bit Parallel ITU-R BT.656 - Seven Overlay Colors Analog Output Formats - Y/C + Two Composite - RGB + Composite (SCART) Flexible Video Timing Control - Timing Master or Slave - Selectable Polarity on Each Control Signal - Programmable Blank Output Timing - Field Output Closed Caption Encoding for NTSC and PAL 2x Upscaling of SIF Video Four 2x Oversampling, 10-Bit DACs I2C Inter...