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.
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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
blasting, are supported in Windows Vista operating systems. Quality video is
accomplished by using 10-bit video ADCs, a full 10-bit video data path, and an
adaptive 3D comb filter. The device also includes horizontal and 5-tap vertical
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.
Distinguishing Features
• PCI Express 1.0a Compliant Bus
• Adaptive 3D comb filtering via host
memory
• Integrated analog IF demodulator for low or
high IF tuners
• Worldwide Audio and Video Decoding
• Automatic Video and Broadcast Audio
Standard 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
– Serial or Parallel Interfaces
Part Number
CX23888
Description
PCI Express Broadcast Audio/Video
Decoder with 3D Comb and Analog
IF Demodulator
CONEXANT [ CONEXANT SYSTEMS, INC ]
