Video
PCI Express Video Decoders
PCI Express Broadcast Audio/Video Decoder
with 3D Comb and Analog IF Demodulator
CX23888
Conexant’s portfolio includes a comprehensive suite of semiconductor
solutions for communications and consumer applications.
•
The CX23888 brings Conexant’s long heritage of audio and video capture
solutions to systems that enable PCI Express bus architectures. The device
integrates all functions required to perform television and external A/V capture
on personal computers or consumer electronic devices.
The integrated worldwide video decoder and audio decoder can be used
for a high performance, cost effective, basic analog television capture, or
can be used as the base for more complex multiple tuner configurations.
The devices can capture a single analog stream, two simultaneous digital
transport streams, or a combination of analog and digital programming.
In addition, analog, hybrid and combo configurations may be used in
conjunction with hardware MPEG encoders.
Highly Integrated
The CX23888 integrates an anti-aliasing, noise rejection filters, and automatic
gain control (AGC) and also includes an integrated analog IF demodulator
compatible with high or low IF tuners. Furthermore, the CX23888’s advanced
IR features, such as remote learning, remote system wake, and STB
Distinguishing Features
• PCI Express 1.0a Compliant Bus
• Adaptive 3D comb filtering via host memory
accomplished by using 10-bit video ADCs, a full 10-bit video data path, and an
• Integrated analog IF demodulator for low or high IF tuners
adaptive 3D comb filter. The device also includes horizontal and 5-tap vertical
• Worldwide Audio and Video Decoding
blasting, are supported in Windows Vista operating systems. Quality video is
scaling, hue, brightness, saturation, and contrast controls.
For high-quality audio, we have analog to digital converters for stereo audio
capture and a minimum of 16-bit audio resolution through the entire audio data
path. This ensures high fidelity audio, whether it comes from the integrated
broadcast audio decoder or external serial audio sources. The audio path
includes an automatic volume control function and two assignable stereo
processing units for control of volume, three-band equalization, and balance.
The level of audio and video integration provided by the CX23888 removes the
need for additional broadcast audio decoding and processing chips or external
sound demodulation chips. It also reduces the overall bill of materials (BOM)
for the system developer, without compromising audio and video performance.
• A
utomatic Video and Broadcast Audio
Standard Detection and Configuration
• F
lexible 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
• A
udio Sample-rate-converters on all
Inputs and Outputs
• Two MPEG Transport Stream Ports
– Serial or Parallel Interfaces
Part Number CX23888
Description
PCI Express Broadcast Audio/Video Decoder with 3D Comb and Analog IF Demodulator
Video
PCI Express Video Decoders
Features
• S
upport 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.)
• Adaptive 3D comb filtering via host memory
• Macrovision 1.0 Detection Compliant
• A
utomatic video and broadcast audio standards detection
and configuration
• Support for the following video formats – Composite, S-Video,
480i YPrPb, RGB Packed, YCrCb Packed, 10-bit Packed, and
YCrCb/YUY2 Format
• A
vanced Consumer IR functionality enables systems to learn,
receive and blast IR signals
• PCI Express 1.0a compliant bus
• Worldwide audio and video decoding
• F
lexible 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
• H
igh-quality multi-tap horizontal and vertical image scaler for
decoded video or 4:2:2 sources
• I2s in/out
• Two MPEG transport stream ports: Parallel and Serial
• Auxiliary Phase Locked Loop (PLL) clock for general use
• P
rogrammable VBI data slicer for data services such as closed
caption, WSS, and program guides such as Gemstar 1x & 2x
• Integrated analog IF demodulator for low or high IF tuners
• T
wo program stream inputs accommodating Serial or
Parallel interfaces
• ITU-R BT.656 Input Port and ITU-R BT.656 Output Port
GPIO x24
Tuner IF
High & Low
Four CVBS /
Luma Inputs
Two Chroma /
One PrPb /
One SIF
Inputs
Left Audio In
Right Audio In
12-bit
IF/Audio
ADC
Analog
Front
End
CVBS
Y/C
YPrPb
SIF
IF Video
Demod
3D/2D
Comb
Filter
Video Decoder
NTSC/PAL/
SECAM
Audio Decoder
BTSC/EIAJ/A
2/NICAM/
AM
18-Bit
Audio
ADCs
Baseband
Audio
Vol/Tone
GPIO
2x I2C
Master
UART
SCL{1,2} /
SDA{1,2}
RS232
Parallel TS/PS
Input Port or
BT.656/VIP1.1
Input or Output
Clock,
Data[7:0],
Start, Valid
Serial TS/PS
Input Port
Clock, Data,
Start, Valid
I2S In/Out
X1 PCI Express DMA Interface
16 - 24 Bit /
32, 44.1, 48, 96 kHz
PCI Express Bus
2x PLL
Audio
Master
Clock
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 costeffective 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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logo are registered trademarks of Conexant Systems, Inc. All other trademarks
are owned by their respective owners. Although Conexant strives for accuracy
in all its publications, this material may contain errors or omissions and is
subject to change without notice.
This material is provided AS IS and without
any express or implied warranties, including merchantability, fitness for a
particular purpose and non-infringement.
Conexant shall not be liable for any
special, indirect, incidental or consequential damages as a result of its use.
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Doc# PBR-200974