BT868 Datasheet, PDF (1/104 Pages) List of Unclassifed Manufacturers – Flicker-Free Video Encoder with UltrascaleTM Technology

Bt868/Bt869
Flicker-Free Video Encoder with Ultrascale^TM Technology
The Bt868/869 is specifically designed for video systems requiring the generation of
high-quality flicker-free composite and Y/C (S-video) signals from various YCrCb or
RGB digital streams. The Bt868/869 accepts any input format from 640 x 480 to
800 x 600 resolution.
The Bt868/869 uses Conexant’s UltraScale™ technology to provide the most
advanced vertical and horizontal scaling necessary for the display of non-interlaced
data on interlaced devices such as the TV. The UltraScale™ technology converts the
lines of input pixel data to the appropriate number of output lines for producing a
full-screen, high-quality image.
The Bt868/869 performs 5-line vertical filtering, which includes poly phase
interpolation scaling for overscan compensation and flicker filtering. Horizontal
scaling for overscan compensation is achieved by altering the encoder clock
frequency. This approach preserves all of the high frequency components of the
input signals, which are essential for the highest quality display of text intensive
images such as web pages on TVs. The amount of flicker filtering and overscan
compensation is programmable.
Worldwide video standards are supported, including NTSC-M (N. America,
Taiwan, Japan), PAL-B,D,G,H,I (Europe, Asia), PAL-M (Brazil), PAL-N (Uruguay,
Paraguay), and PAL-Nc (Argentina). Bt868 and Bt869 are functionally identical, with
the exception that Bt869 can output Macrovision Level 7.0 anticopy algorithm.
Functional Block Diagram
P[23:0]
HSYNC*
VSYNC*
BLANK*
FIELD
SIC
SID
ALTADDR
RESET*
SLEEP
SLAVE
PAL
XTALIN
XTALOUT
Input
DEMUX
Color Space
Conversion
Flicker
Filter/Scaler
FIFO
Timing
Serial
Interface
Internal
Reference
Video
Encoder
DAC
MUX
XTAL
OSC
PLL
Clock
Generation
BIAS
GEN
FSADJUST
COMP
VREF
DACA
DACB
DACC
VBIAS
CLKO
CLKI
Distinguishing Features
• Digital RGB or YCrCb non-interlaced
input to interlaced or non-interlaced
analog TV output modes:
YCrCb Modes:
– 16-bit 4:2:2 multiplexed 8-bit
– 24-bit 4:4:4 multiplexed 12-bit
– 24-bit 4:4:4 non-multiplexed 24-bit
RGB Modes:
– 15/16 bit 5:6:5 RGB multiplexed 8-bit
– 24-bit 8:8:8 RGB mulitplexed 12-bit
– 24-bit 8:8:8 RGB non-multiplexed
24-bit
• Digital RGB non-interlaced input to
analog RGB noninterlaced (VGA/SVGA)
output modes:
– 15/16 bit 5:6:5 RGB multiplexed 8-bit
– 24-bit 8:8:8 RGB mulitplexed 12-bit
– 24-bit 8:8:8 RGB non-multiplexed
24-bit
• Support for NTSC/PAL outputs in the
following modes:
– Interlaced and non-interlaced outputs
– S-video output (simultaneous with
composite NTSC or PAL outputs)
– Component YUV analog output mode
• 5-line vertical filtering scaling for
overscan compensation and flicker
filtering
• CCIR601 compatible input mode
• Luma and chroma comb filtering
• 3 x 10-bit DACs
• 6 MHz Luma bandwidth
• Macrovision 7.0 copy protection
• 80-pin PQFP package
• 3.3 V operation with 5 V tolerant IOs
• 2-line serial programming interface
• Power-Down modes
• Master/slave video timing operation
• TV connected register flag
• Automatic configuration
Applications
• Desktop/Portable PCs with TV-Out
• Living-room PCs
• Internet PC/TVs
• Internet Appliances
Data Sheet
100123B
September 2000