Bt819A/817A/815A
VideoStream™ Decoders
Distinguishing Features
Bt819A – Video Capture Processor for
TV/VCR Analog Input
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Single-Chip Composite/S-Video
NTSC/PAL to YCrCb Digitizer
On-Chip UltralockTM
Square Pixel and CCIR601 Resolu-
tion for NTSC and PAL
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Bt817A – Composite Video and S-Video Decoder
Bt815A – Composite Video Decoder
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Chroma Comb Filtering
Arbitrary Horizontal Scaling and
Vertical Scaling (using line store)
Arbitrary Temporal Decimation
for a Reduced Frame-Rate Video
Sequence
The Bt819A, Bt817A and Bt815A VideoStream Decoders are a family of single-
chip, pin and register compatible, composite NTSC/PAL video and S-video
decoders. Low operating power consumption and power down capability make
them ideal low-cost solutions for PC video capture applications on both desktop
and portable system platforms. They support square pixel and CCIR601 resolu-
tions for both NTSC and PAL. They have a flexible pixel port which supports a
variety of system interface configurations, and they are offered in both a 100-pin
PQFP and 100-pin TQFP.
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Programmable Hue, Brightness,
Saturation, and Contrast
User-Programmable Cropping of
the Video Window
2x Oversampling to Simplify
External Analog Filtering
Two-Wire I2C Bus Interface
On-Chip 40-Pixel-Deep
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Functional Block Diagram
Asynchronous Output FIFO
8- or 16-Bit Pixel Interface
YCrCb (4:2:2) Output Format
Software Selectable Three-Input
Analog Mux
Auto NTSC/PAL Format Detect
Automatic Gain Control
XT0
XT1
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MUX0
MUX1
ANALOG
MUX
I2C
JTAG
ULTRALOCKTM
AND
MUX2
VIDEO
TIMING
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•
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MUXOUT
CLOCK
GENERATION
VIDEO
TIMING
UNIT
SYNCDET
REFOUT
AGC
IEEE 1149.1 (JTAG) Interface
100-Pin PQFP and TQFP Packages
OUTPUT
CONTROL
YREF+
YIN
40 MHZ
ADC
LUMA-CHROMA
SEPARATION
SPATIAL AND
TEMPORAL
SCALING
YREF–
Related Products
AND
CHROMA
DEMODULATION
CREF+
CIN
16
OUTPUT
DATA
•
•
Bt812, Bt858, Bt855,
Bt856, Bt857
Bt851
40 MHZ
ADC
CREF–
Applications
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Multimedia
Image Processing
Desktop Video
Video Phone
Teleconferencing
Interactive Video