BT818A Ver la hoja de datos (PDF) - Unspecified
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BT818A Datasheet PDF : 110 Pages
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FUNCTIONAL
DESCRIPTION
Functional Overview
Brooktree’s VideoStream products are a family of single-chip, pin and register
compatible solutions for processing analog NTSC/PAL video into digital 4:2:2
YCrCb video. They provide a comprehensive choice of capabilities to enable the
feature set and cost to be tailored to different system hardware configurations. All
solutions are housed in a 100-pin QFP package. A detailed block diagram is shown
in Figure 1.
Bt819A
Video Capture
Processor for TV/VCR
Analog Input
The Bt819A Video Capture Processor is a fully integrated single-chip decoding
and scaling solution for analog NTSC/PAL input signals from TV tuners, VCRs,
cameras, and other sources of composite or Y/C video. It is the first front-end input
solution for low-cost PC video/graphics systems to deliver complete integration
and high-performance video synchronization, Y/C separation, filtered scaling and
optional FIFOed output pixel data. The Bt819A has all the mixed signal and DSP
circuitry required to convert an analog composite waveform into a scaled digital
video stream supporting a variety of video formats, resolutions and frame rates.
Bt817A
Composite/S-Video
Decoder
The Bt817A provides full composite and S-video capability along with filtered
horizontal scaling. However, vertical scaling can be implemented by line-dropping
only, and there is no output FIFO option.
Bt815A
Composite Video
Decoder
The Bt815A has the minimum feature set with composite-only video decoding (no
S-video capability). As with the Bt817A, vertical scaling is implemented through
line dropping, and there is no output FIFO option.
See Table 1 for a comparison of Bt819A, Bt817A and Bt815A features.
Table 1. VideoStream Feature Options
Feature Options
Composite Video Decoding
S-Video Decoding
Filtered Vertical Scaling
Optional Output FIFO
Bt819A
Bt817A
Bt815A
1
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