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CX23103 USB Audio/Video Decoder
Features
USB 1.1/2.0 compliant bus
Support for the following audio
formats: Stereo, Mono, Dual
Language (Mono), Tri Language
(Trivox)
2
Three I
C master ports (two ports are
provided for a two-tuner design to
2
isolate I
C transactions to reduce
noise)
Macrovision 1.0 Detection Compliant
Support for the following video
formats: Composite, S-Video, 480i
YPrPb, RBG Packed, YCrCb Packed,
10-bit Packed, and YCrCb/YUY2
Format
Advanced consumer IR functionality
enables systems to receive, learn, and
blast IR signals
High-quality multi-tap horizontal and
vertical image scaler for decoded
video or 4:2:2 sources
2
I
S out
Auxiliary Phase Locked Loop (PLL)
clock for general use
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
ITU-R BT.656 output port
Overview
The CX23103 brings Conexant’s
long heritage of audio and video
capture solutions to systems that
enable universal serial bus
architectures. The CX23103
integrates all the functions
required to perform external
A/V capture on personal
computers or consumer electronic
devices.
The CX23103 decoder enables
the capture of analog and digital
broadcast streams on personal
computers through an integrated
Universal Serial Bus (USB) interface. The device can capture a single analog
stream, two simultaneous digital television 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.
The CX23103 integrates anti-aliasing, noise rejection filters and automatic gain
control (AGC). Quality video is accomplished by using 10-bit video ADCs, a full
10-bit video data path, and a horizontal and 5-tap vertical scaling, hue,
brightness, saturation, and contrast controls.
For high-quality audio, the CX23103 has analog to digital converters for stereo
audio capture and a minimum of 16-bit audio resolution through the entire audio
data path which ensures high fidelity audio. 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 CX23103 removes the need for additional
audio ADCs and processsing chips or USB bridge chip. It also reduces the
overall bill of materials (BOM) for the system developer, without compromising
audio and video performance.