HMP8170
NTSC/PAL Video Encoder
Typical Diagram
Key Features
- (M) NTSC and (B, D, G, H, I, M, N, NC) PAL Operation
- BT.601 and Square Pixel Operation
- Digital Input Formats
- 8-bit, 16-bit 4:2:2 YCbCr
- 8-bit BT.656
- Analog Output Formats
- Y/C + Two Composite
- RGB + Composite
- YUV + Composite
- Flexible Video Timing Control
- Timing Master or Slave
- Selectable Polarity on Each Control Signal
- Programmable Blank Output Timing
- "Sliced" VBI Data Support
- Closed Captioning
- Widescreen Signalling (WSS)
- BT.653 System B and C Teletext
- NABTS (North American Broadcast Teletext)
- WST (World System Teletext)
- Four 2x Oversampling, 10-Bit DACs
- Fast I2C Interface
Description
The HMP8170 NTSC and PAL encoder is designed for use in systems requiring the generation of high-quality NTSC and PAL video.
YCbCr digital video data drive the P0-P15 inputs. The Y data is optionally lowpass filtered to 6MHz and drives the Y analog output. Cb and Cr are each lowpass filtered to 1.3MHz, quadrature modulated, and added together. 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 DACs can drive doubly-terminated (37.5Ω) lines, and run at a 2x oversampling rate to simplify the analog output filter requirements.
Applications
- DVD Players
- Video CD Players
- Digital VCRs
- Multimedia PCs
