Bt829B/827B
VideoStreamII Decoders
Advance Information
This document contains information on a product under development. The parametric information contains target
parameters that are subject to change.
Bt829B– Video Capture Processor and Scaler for
TV/VCR Analog Input
Bt827B– Composite Video and S-Video Decoder
The Bt829B and Bt827B VideoStream™ Decoders are a family of single-chip, pin-
and register-compatible, composite NTSC/PAL/SECAM video and S-Video decod-
ers. They are also pin and register backward compatible with the Bt829A/827A
family of products. Low operating power consumption and power-down capabil-
ity make them ideal low-cost solutions for PC video capture applications on both
desktop and portable system platforms with a 3.3 V digital I/O interface. They
support square pixel and CCIR601 resolutions for NTSC, PAL, and SECAM video.
They have a flexible pixel port which supports a variety of system interface config-
urations, and they are offered in a 100-pin Plastic Quad Flat Pack (PQFP).
Functional Block Diagram
Distinguishing Features
•
Single-chip composite/S-Video NTSC/PAL/
SECAM to YCrCb digitizer
•
On-chip Ultralock
™
•
Square Pixel and CCIR601 Resolution for:
–
NTSC (M)
–
NTSC (M) without 7.5IRE pedestal
–
PAL (B, D, G, H, I, M, N, N
combination)
–
SECAM
•
Chroma comb filter
•
Arbitrary horizontal and 5-tap vertical
filtered scaling
•
Hardware closed-caption decoder
•
Vertical Blanking Interval (VBI) data
pass-through
•
Arbitrary temporal decimation for a
reduced frame-rate video sequence
•
Programmable hue, brightness, saturation,
and contrast
•
User-programmable cropping of the video
window
•
2x oversampling to simplify external
analog filtering
•
Two-wire Inter-Integrated Circuit (I2C) bus
interface
•
8- or 16-bit pixel interface
•
YCrCb (4:2:2) output format
•
Software selectable four-input analog MUX
•
4 fully programmable GPIO bits
•
Auto NTSC/PAL format detect
•
Automatic Gain Control (AGC)
•
3.3 V I/O
•
Typical power consumption 0.85 W
•
IEEE 1149.1 Joint Test Action Group
(JTAG) interface
•
100-pin PQFP
Related Products
•
Bt829A, Bt856/857, Bt864A/865A, Bt864/
865, Bt852
Applications
•
Multimedia
•
Image processing
•
Desktop video
•
Video phone
•
Teleconferencing
•
Interactive video
ADC
Ultralock
and
Clock
MUX0
MUX1
MUXOUT
SYNCDET
REFOUT
YREF+
YIN
16
Output
Luma-Chroma
Separation
and
Chroma
Output
Video
YREF–
Analog
MUX
ADC
CREF+
CIN
CREF–
AGC
Timing
Control
Data
I2C
JTAG
Demodulation
Spatial and
Temporal
Scaling
Video
Timing
Unit
Generation
XT0
XT1
40 MHz
40 MHz
MUX2
MUX3
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