| Bt848 is a complete,
low-cost, single-chip solution for analog NTSC/PAL/SECAM
video capture on the PCI bus. As a bus master, Bt848 does
not require any local memory buffers to store video pixel
data, which significantly minimizes the hardware cost for
this architecture. Bt848 takes advantage of the PCI-based
system's high bandwidth and inherent multimedia
capability. It is designed to be interoperable with any
other PCI multimedia device at the component or board
level, thus enabling video capture and overlay capability
to be added to PCI systems in a modular fashion at low
cost. The Bt848 solution is independent of the PCI system
bus topology and may be used directly on a motherboard
planar bus, on a card for a planar, or on a secondary
bus. |
- Distinguishing Features
- Fully PCI Rev 2.1 compliant
- Auxiliary GPIO data port and video data port
- Supports image resolutions up to 768 x 576 (full
PAL resolution)
- Supports complex clipping of video source
- Zero wait state PCI burst writes
- Field/frame masking support to throttle bandwidth
to target
- Multiple YCrCb and RGB pixel formats supported on
output
- Supports NTSC/SECAM/PAL analog input
- Image size scalable down to icon using vertical
and horizontal interpolation filtering
- Multiple composite and S-video inputs
- Supports different destinations for even and odd
fields
- Supports different colorspace/scaling factors for
even and odd fields
- Supports mapping of video to 225 color palette
- VBI data capture for closed captioning teletext
and intercast data decoding
Evaluation System
- Bt848EVK Evaluation Kit
- Reference design material
Applications
- PC TV
- Intercast receiver
- Desktop video phone
- Motion video capture
- Still-frame capture
- VBI data services capture
|
