Video
PCI Express Video Decoders
Features
• Support for the following audio formats – Stereo, Mono, Dual
Language (Mono), Tri Language (Trivox)
• Two I2C master ports (Two ports are provided for a two tuner
design to isolate I2C transactions to reduce noise.)
• Macrovision 1.0 Detection Compliant
• Support for the following video formats – Composite, S-Video,
480i YPrPb, RGB Packed, YCrCb Packed, 10-bit Packed, and
YCrCb/YUY2 Format
• Avanced Consumer IR functionality enables systems to learn,
receive and blast IR signals
• High-quality multi-tap horizontal and vertical image scaler for
decoded video or 4:2:2 sources
• I2s in/out
• Auxiliary Phase Locked Loop (PLL) clock for general use
• Integrated analog IF demodulator for low or high IF tuners
• Adaptive 3D comb filtering via host memory
• PCI Express 1.0a compliant bus
• Worldwide audio and video decoding
• Automatic video and broadcast audio standards detection
and configuration
• Flexible video input MUX supporting composite, S-Video,
and component inputs with integrated anti-alias filtering
• Integrated sigma-delta stereo audio ADCs with 4:2 MUX
• Audio sample rate converters on all inputs and outputs
• Two MPEG transport stream ports: Parallel and Serial
• Two program stream inputs accommodating Serial or
Parallel interfaces
• Programmable VBI data slicer for data services such as closed
caption, WSS, and program guides such as Gemstar 1x & 2x
• ITU-R BT.656 Input Port and ITU-R BT.656 Output Port
GPIO x24
SCL{1,2} /
SDA{1,2}
RS232
Tuner IF
High & Low
12-bit
IF/Audio
ADC
IF Video
Demod
3D/2D
Comb
Filter
GPIO
2x I
2
C
Master
UART
Four CVBS /
Luma Inputs
Two Chroma /
One PrPb /
One SIF
Inputs
Analog
Front
End
CVBS
Y/C
YPrPb
SIF
Video Decoder
NTSC/PAL/
SECAM
Baseband
Audio
Vol/Tone
Parallel TS/PS
Input Port or
BT.656/VIP1.1
Input or Output
Clock,
Data[7:0],
Start, Valid
Audio Decoder
BTSC/EIAJ/A
2/NICAM/
AM
Serial TS/PS
Input Port
Clock, Data,
Start, Valid
Left Audio In
Right Audio In
18-Bit
Audio
ADCs
I
2
S In/Out
X1 PCI Express DMA Interface
2x PLL
Audio
Master
Clock
16 - 24 Bit /
32, 44.1, 48, 96 kHz
PCI Express Bus
Single Crystal
Frequency
CX23888 Block Diagram
Conexant Product Portfolio
Conexant’s comprehensive product portfolio includes solutions for imaging, audio, and video applications, and analog modems that enable cost-
effective Internet access. The company’s broadband access products include end-to-end solutions for xDSL networks, and PON solutions for fiber
optic applications.
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in all its publications, this material may contain errors or omissions and is
subject to change without notice.
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