A universal component of the Conexant Set Top Box platform is the MPEG video processor. These MPEG devices serve as the basis of our Digital cable, Terrestrial and Direct Broadcast Satellite
end-to-end solutions.

Digital Cable
Conexant offers end-to-end solutions for the digital cable set top box. Ranging from the tuner input to the cable transceiver MAC to the MPEG-2 cores, Conexant’s products span all the key elements needed to complete a Digital Cable Set Top Box. In addition, Conexant is expanding its suite of technologies to address the emerging requirements for Digital Set Top Box platforms such as home networking, voice over IP, hard disk implementations and cable modem-based applications.

CX24109 Digital Satellite Tuner & QPSK/FEC Demodulator

Highly Integrated, Complete Broadband Satellite Front-End Solution
Conexant's broadband communications portfolio includes a comprehensive suite of semiconductor solutions that enable the digital home and information network. Combining extensive experience in broadband systems and mixed- signal integrated circuit design, Conexant introduces the CX24109 Digital Satellite Tuner creating the ideal satellite front-end solution for the world wide pay TV services. Several million Satellite Set-Top Boxes (STBs) are deployed in many different entertainment networks around the world today. This highly integrated combination of demodulator and satellite tuner reduces the BOM costs and simplifies RF layout.
The CX24109 is a highly integrated, direct down-conversion satellite tuner intended for high-volume digital video, audio and data receivers. When combined with Conexant's existing CX24110 QPSK demodulator/FEC decoder, the chipset provides a complete broadband satellite front-end solution capable of operating from 1 to 45 Msps in the most demanding satellite environments. It is compatible with international standards such as DVB and DSS and supports a BPSK mode as well as DCII. Combined with the CX24121 QPSK demodulator/FEC decoder, the chipset provides a complete broadband satellite front-end solutions capable of operating from 10 to 32 Msps specifically targeting the PayTV segment of the market with a very optimised BOM and cost effective solution.
Features
Zero-IF architecture eliminates the need for image reject filtering
Integrated LNA
Integrated LO with onboard VCO and synthesiser
Single +5 V supply
Oscillator output for demodulator
Does not require Balun
Applications
DBS set-top boxes
Commercial digital video, audio and data receivers
Digital VCRs

High-Performance, Low-Power Broadband Satellite Front-End Solution
Combining Conexant’s experience in broadband systems and mixed-signal integrated circuit design, the CX24110 is the ideal solution for a wide variety of applications in DVB/DSS set-top and PC receivers, digital VCRs, and single/multiple-channel per carrier receivers. When combined with the CX24108 satellite tuner RFIC, the CX2410 provides a complete broadband satellite front-end solution capable of operating from 1 to 45 Msps in the most demanding satellite environments.

The CX24110 is a QPSK/BPSK demodulator IC with internal dual analogue to digital converters, digital demodulation, and forward-error correction (FEC). The demodulator IC provides digital denotation, digital filtering, equalisation, and Viterbi/Reed-Solomon FEC. The CX24110 is compliant with the DVB (ETS 300-421) specification for satellite transmission.

The CX24110 provides many advanced features that enhance overall system performance. The demodulator IC automatically corrects for external quadrature gain/phase imbalances and for DC offsets. The input signal level variations (e.g., due to rain fade) are compensated for the Automatic Gain Control, and frequency offsets due to inexpensive consumer LNB’s are correct by a robust-carrier tracking loop. A unique feature of the CX24110 is an automatic acquisition, and performs a smart search to reacquire the carrier during fade conditions. The CX24110 has integrated SNR and BER monitors for channel-performance measurements.

Features
QPSK/BPSK demodulation
DVB/DSS complaint
Symbol rates: 1 to 45 MSP
Automatic acquisition
Adaptive (FIR) equaliser
Internal carrier and bit timing recovery
Internal Viterbi and Reed-Solomon FEC
Internal SNR and BER monitors
DiSEqC™ Level 1.1 LNB control
External crystal frequency:10 MHz
Sampling frequency: 45, 60, 80, 90 MHz
Quadrature equalisation compensation: ± 3 dB gain, ±13o phase
Viterbi decoding rates:
1/2, 2/3. 3/4, 4/5, 5/6, 6/7, and 7/8
Output data interface: serial or parallel
Supply voltage: +3.3V, +1.8V

CX24123 Digital Satellite Demodulator DVB/DDS/DCII

Low-power QPSK demodulator for worldwide satellite set-top box applications
Conexant's broadband communications portfolio includes a comprehensive suite of semiconductor solutions that enable the digital home and information network. The CX24123 is a DVB, DSS and DCII compliant demodulator and Forward Error Correction (FEC) decoder. When combined with a satellite tuner, such as the CX24109 tuner, the CX24123 provides a complete broadband satellite front-end solution capable of operating from 1 to 45 Msps.

The CX24123 is the ideal solution for a wide variety of applications in digital satellite set-top box, personal computer receivers and residential gateways. This DiSEqC™ 2.x compliant demodulator enables two-way communication between the set-top box and peripheral satellite equipment such as Low- Noise Block Converters (LNB) and switches.

Providing digital denotation, digital filtering, equalisation, and Viterbi/Reed- Solomon FEC, the CX24123 provides many advanced features that enhance overall system performance. The CX24123 automatically corrects for external quadrature gain/phase imbalances and for DC offsets. Input signal level variations (e.g. due to rain fade) are compensated by automatic gain control (AGC). Frequency offsets due to inexpensive consumer LNBs are corrected by a robust Carrier-Tracking Loop.

Features
DVB//DSS/DCII-compliant
Symbol rates 1 to 45 Msps
Internal PLL, only a single low-frequency crystal or clock is required
Automatic acquisition
± 10 MHz acquisition range
Carrier tracking: ±5 MHz
6-bit Analogue-to-Digital Converters (ADCs)
4-bit soft decision
Digital matched filtering
Multi-rate decimation filter
Internal carrier and bit-timing recovery
Boundary scan test function
Serial or parallel output data interface
External symbol clock reference
Internal SNR and BER monitors
DiSEqC™ level 2.x two-way
Low-Noise Block Converter (LNB) control
Power-down mode
Quadrature equalisation compensation
  - ±3.0 dB gain imbalance
  - ±13 degree phase offset

Applications
DVB//DSS/DCII set-top box and PC receivers
Residential gateways

CX24152/3/4/5/6 Satellite System IC

Single-Chip Interactive Set-top Box Solutions
Conexant's broadband communications portfolio includes a comprehensive suite of semiconductor solutions that enable the digital home and information network. Conexant's interactive TV decoder products provide complete single IC system solutions for the core electronics of high-performance set-top boxes deployed in digital satellite, cable or terrestrial TV networks. The CX2415x IC family offers a high performance embedded 32-bit RISC CPU, a complete DVB/DIRECTV broadcast service decoder system and advanced 2D graphics and display composition performance. This combination enables consumer electronics manufacturers to build low-cost digital TV set-top boxes to support a wide range of advanced, interactive, consumer entertainment services.

Features
MPEG-2 MP@ML video decoder supporting NTSC and PAL CCIR601 image   resolution
MPEG-1/MPEG-2 and Dolby Digital (AC-3) audio decoder
MPEG-2/DVB/DIRECTV transport stream demultiplexing 1-45 Msym/sec QPSK/BPSK demodulator/FEC with DiSEqC 2.x signalling support
NTSC channel 3/4 RF modulator
NTSC/PAL/SECAM TV encoder supporting simultaneous CVBS, YC & RGB/YPrPb analogue video output signals
3DES ciphering engine & integrated OTP memory for unique, IC security  personalisation
On-chip boot ROM for secure STB S/W authentication
Integrated DVB common descrambler & DES ECB descrambler
NDS Videoguard conditional access hardware support
200 MHz 224 MIPS 32-bit ARM920 CPU with 16KB I & D caches and MMU
Advanced 2D graphics rendering engine for alphablt, bitblt, textblt, line draw   and colour expansion acceleration
Unified memory architecture supporting 16 or 32-bit SDRAM
MPEG picture and still plane upscaling and downscaling
Multiplane video/graphics image composition with colour key or 256-level alpha   blending
Video-picture-in-graphics with flexible picture size and aspect ratio
Flicker filtering, aspect ratio conversion and hardware cursor
4/8/16-bit ARGB/A YCrCb graphics
Integrated 32-bit 33 MHz PCI 2.1 bus bridge controller