DVB-T Compliant Demodulation Overview L64781, second chip Logic's

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DVB-T Compliant Demodulation Overview L64781, second chip Logic's

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L64781 Single-Chip COFDM Receiver
DVB-T Compliant Demodulation
Overview L64781, second chip Logic's family highly integrated, highperformance solutions digital terrestrial broadcast, fully integrated, single-chip COFDM (Coded Orthogonal Frequency Division Multiplex) demodulator. L64781 channel receiver fully compliant with DVB-T standards follows highly successful L64780, widely used manufacturers producing set-top boxes current European digital terrestrial market (OnDigital, Nordig). Proven Solution Fast Time Market completeness this solution enables spectrum applications both 2K-only broadcasting multiple single frequency network broadcasting Scandinavia, Spain other emerging markets such Singapore. robust channel equalizer doppler immunity also allow manufacturers this solution mobile DVB-T applications. L64781 comprises COFDM demodulator, DVB-compliant decoder 10-bit analog-to-digital converter. With this device, digital set-top manufacturers have ready-proven, high-performance technology bring DTT-enabled products market quickly cost effectively. L64781 fully variable rate demodulator, supporting 8MHz channels. chip highly integrated (both timing frequency loops fully digital) capable delivering 31.7 Mbit/sec. This represents more than movie channels live video channels each 8MHz channel previously filled single analog channel.
Front
Tuner L64781 MPEG Transport Stream
Host Micro-controller
L64781 interfaces seamlessly tuner provide error corrected MPEG2-TS. This gives set-top manufacturers complete digital terrestrial receiver enables fast time-to-market
L64781, Logic's fully integrated single-chip COFDM demodulator, fully compliant DVB-T standard digital terrestrial television Europe
L64781 Single-Chip COFDM Receiver
Features
size Includes 10-bit Digital timing recovery 6MHz, 7MHz 8MHz variable bandwidth capability 64-QAM constellations hierarchical constellations with scale factors
Tuner
Tuner, optional)
Digital Down.
Freq. Sync Channel State Information
Implements non-hierarchical QPSK, 16-QAM
Interp. Freq. Shift Soft Delnt
Viterbi code rates 1/2, 2/3, 3/4, 5/6, Guard intervals: 1/4, 1/8, 1/16, 1/32 Includes digital common phase error
correction (CPE)
Digital Timing Loop
Timing Sync
SPI/
Channel state information protection
against multipath interference
board with COFDM demodulator, tuner
interface
L64781 applies error correcting codes deliver error-free MPEG2 transport stream source decoding chip
(4.57MHz) sampling with digital
baseband down-conversion allowing single
Serial microprocessor interface
Technical Description L64781 implements operational modes specified DVB-T specification, i.e., FFT, non-hierarchical hierarchical modulations, guard interval sizes Viterbi code rates. chip samples signal 4.57 MHz) converts digitally into baseband. L64781 then applies digital processing steps extract data from received signal, i.e., FFT, timing frequency synchronization, channel estimation equalization, generation optimal soft decisions using channel state information, symbol de-interleaving. also extracts system information carried pilots, stores into internal registers delivers external micro controller. L64781 finally applies error correcting codes deliver error-free MPEG2 transport stream source decoding chip. L64781 highly integrated device that contains both digital timing frequency loops. external components required operate demodulation, only cost required. tuner requires analog feedback, device also provides means analog timing frequency control signals form wire sigma-delta modulated signals. This requires minimal external circuitry interconnection. implements standard serial micro controller interface.
Complete Solution Fast Time Market accelerate development set-top solutions, L64781 available with developer's kit, allowing manufacturers select option best suited their target market application requirements. provides hardware software components shorten development cycles ensure fast time market. powerful Windows Graphical User Interface allows manufacturers easily perform validation tests store results intuitive way.
Benefits
Fully integrated single-chip COFDM DVB-T
compliant demodulator fast time-tomarket
Systems expertise support gained from
first-generation chip
Minimal effort required implementation
complete COFDM system
Rapid time frequency synchronization Excellent mobile reception (channel equalizer
handling varying channels)
Reduced systems costs through common
phase error compensation
Near theory high-performance demodulation
algorithm
Fast access circuit evaluation with local
field application engineering support
Simple microprocessor interface resulting
from high automation
NIM781 Evaluation Board provides full capabilities accelerated development fast time market
developer's consists complete evaluation board with interface MPEG2 transport stream output. Software enable system testing code optimization included, along with manual that provides test evaluation information board layout. also contains under Windows 95/97. NIM781 board also seamless interface Logic's Set-top Development Platform.
Components Logic's L64781 Developer's
Evaluation board with interface MPEG2-TS output Complete documentation Software, including driver interface under Windows Board layout Schematics Bill materials
L64781 Single-Chip COFDM Receiver
Logic Integra® Set-top Development Platform designers developing set-top solution using L64781 chip, Logic offers Integra Set-top Development Platform. This provides complete development environment, including complementary devices, such single-chip SC2000 source decoder. permits designers implement complete two-chip set-top solution. Integra component, L64781 features advantages this nextgeneration platform: Evolutionary product strategy, ensuring seamless cost-effective migration path future Software compatibility with legacy chipsets Support open, international industry standards Background L64780 L64781 were jointly developed Logic BBC. BBC, been influencer acceptance European DVB-T standard, implemented hardware prototypes COFDM modem successfully tested over experimental broadcasts other European locations. 1998, tests field trials carried other validation groups verified performance interoperability system highlighted L64780 best performing chipset marketplace. L64781 subsequently benefited from various field validations carried L64780, ensuring high-performance device.
more information please call: Europe +32.11.300.351 408.433.7700 Dept. www.lsilogic.com Logic Corporation North American Headquarters Milpitas, Tel: 1.408.433.8000 Fax: 1.408.433.8989 Logic Europe European Headquarters United Kingdom Tel: 44.1344.426544 Fax: 44.1344.481039 Logic Headquarters Tokyo, Japan Tel: 81.3.5463.7821 Fax: 81.3.5463.7820
9000 Certified
Logic logo design Integra registered trademarks Logic Corporation. other brand product names trademarks their respective companies. Logic Corporation reserves right make changes products services herein time without notice. Logic does assume responsibility liability arising application product service described herein, except expressly agreed writing Logic; does purchase, lease, product service from Logic convey license under patent rights, copyrights, trademark rights, other intellectual property rights Logic third parties. Copyright ©1999 Logic Corporation. rights reserved.
Order I20066 1199.1K.CM.TP Printed

DVB-T Compliant Demodulation Overview L64781, second chip Logic's

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