ETC L64782

L64782 Single-Chip COFDM
• 2K and 8K FFT size
The L64782, a fully integrated, single-chip COFDM (Coded Orthogonal
Frequency Division Multiplex) receiver, is the third generation chip in LSI Logic’s
family of highly integrated, high-performance solutions for digital terrestrial TV
(DTT) broadcast. Following-on from the highly successful L64781 and L64780
receivers, the L64782 is fully compliant with DVB-T standards, as defined by
ETS 300 744 and exceeds all mandatory requirements of today’s broadcasters,
placing it at the forefront of DVB-T receiver design.
• DVB-T ETS 300-744 compliant
• Includes FEC and 10-bit ADC
• Choice of direct IF (36.167 MHz)
and low IF (4.57MHz) sampling
• Digital channel filter eliminates the
need for dual switchable bandwidth
SAW filter in tuner
• Digital timing recovery
The L64782 comprises the COFDM demodulator with direct IF sampling,
a DVB-compliant FEC decoder, a 10-bit analog-to-digital converter and an
integrated microcontroller. With this device, digital set-top box and TV
manufacturers have a ready-proven, high-performance technology to bring
DTT-enabled products to market quickly and cost effectively.
• 6MHz, 7MHz and 8MHz variable
• Includes digital common phase error
The L64782 adds to the robust channel equalizer and doppler immunity
characteristics of its predecessors. Performance has been enhanced in both of
these critical areas and a diversity combining interface has been added to
allow two L64782 devices to be interconnected, giving Maximum Ratio
Combination (MRC) like performance, where best-in-class mobile performance
is required.
Coupled with the small 64-pin TQFP package and low power features, the
L64782 is ideally suited to mobile reception.
Host Serial Bus
bandwidth capability
• Implements all non-hierarchical and
hierarchical constellations
• All code rates and guard intervals
correction (CPE)
• Dual AGC control
• New timing algorithm for near
optimal echo and SFN pre-echo
• Integrated microcontroller to automate acquisition, operating mode
determination and simplify chip
• Channel state information for
protection against multipath and
Real to
SD Bits
The L64782 is a highly integrated device that contains both digital timing and
frequency loops. No external components are needed to operate the demodulation
and only a low cost crystal is required.
L64782 Single-Chip COFDM Receiver
• Fully programmable digital channel
filter to reject adjacent NICAM
• Further improvement to current
industry-leading co-channel
interference rejection performance
• Expanded AFC acquisition range to
fully detect 1/6 MHz offset
• Diversity interface for optimum
Maximum Ratio Combination (MRC)
like performance with two L64782
• Reliable chip status reporting
• Serial microprocessor interface
• Low Profile 64-pin TQFP package
The L64782 implements all operational modes specified in the DVB-T
specification, i.e., 2K and 8K FFT, non-hierarchical and hierarchical modulations,
all guard interval sizes and Viterbi code rates. The chip supports a wide
range of either direct IF or low IF sampling (including 36.167 MHz and 4.57
MHz) and converts it digitally into baseband.
The L64782 then applies all digital processing steps to extract the data
from the received signal, i.e., FFT, timing and frequency synchronization,
channel estimation and equalization, generation of optimal soft decisions
using the channel state information plus symbol and bit de-interleaving. It also
extracts the system information carried by the TPS pilots. The L64782 finally
applies all error correcting codes to deliver an error-free MPEG2 transport
stream to the source decoding chip.
All aspects of the L64782 are controlled by its internal microcontroller,
which also provides direct control of the associated upstream tuner. This
results in much reduced host driver code complexity, faster acquisition and
simplified channel scanning with the host issuing high level instructions to the
front end such as “Channel Search” or “Channel Jump”.
To accelerate development of set-top box solutions, the L64782 development kit is available, which allows manufacturers to select the option best suited
to their target market and application requirements. The kit provides the hardware and software components necessary to shorten development cycles and
ensure a fast time-to-market. The powerful Windows Graphical User Interface
allows manufacturers to easily perform validation tests and store results in an
intuitive way. The development kit consists of a complete evaluation board
with a PC interface and MPEG2 transport stream output. Software to enable
system testing and code optimization, along with a manual that provides test
and evaluation information and a PC board layout are also included. The GUI
software can operate under Windows 95/98 and Windows NT/2000.
The NIM782 board also has a seamless interface to LSI Logic’s Set-top
Box Development Platform.
• Fully integrated single-chip COFDM
DVB-T compliant demodulator for fast
• Systems expertise and support gained
from first- and second- generation
• Minimal effort required for implementation in a complete COFDM system
• Rapid time and frequency
The NIM782 Evaluation Board provides full capabilities for accelerated
development and fast time-to-market
For designers developing a set-top box solution using the L64782 chip,
LSI Logic offers the Integra Set-top Development Platform. This provides a complete development environment, including complementary devices such as the
single-chip SC2005 source decoder, enabling designers to implement a complete two-chip set-top box solution.
• Excellent mobile reception
• Low power (Less than 800 mW)
• Reduced systems costs through
common phase error compensation
and direct IF sampling
• Near theory high-performance
demodulation algorithm
• Fast access to circuit evaluation with
local field application engineering
Components of LSI Logic’s L64782 Developer’s Kit
Evaluation board with PC interface and MPEG2-TS output
Complete documentation
Software, including driver and GUI interface under Windows
Microcode to download into the L64782’s integrated microcontroller
Board layout
Bill of materials
• Requires only a thin host driver with
L64782 integrated microcontroller
providing a high level of automation
including tuner control
L64782 Single-Chip COFDM Receiver
As an Integra component, the L64782 features all the advantages of this
next-generation platform:
• Evolutionary product strategy, ensuring a seamless and cost-effective
migration path to the future
• Software compatibility with legacy and new chipsets
• Support for open, international industry standards
For more information please call:
LSI Logic Corporation
North American Headquarters
Milpitas, CA
Tel: 866 574 5741
LSI Logic Europe Ltd.
T h e L64780 and L64781 were jointly developed by LSI Logic and BBC
Research and Development, a collaboration that has continued with the
L64782. The BBC, a key influencer in the acceptance of the European DVB-T
standard, has implemented hardware prototypes of the COFDM modem and
successfully tested it over experimental broadcasts in the UK and other
European locations.
In 1998, tests and field trials carried out by BBC Research and
Development and other validation groups verified performance and interoperability of the new system and highlighted the L64780 as the best performing
chipset in the marketplace. The L64781 subsequently benefited from various
field validations carried out on the L64780, ensuring a high-performance
In April 2001, BBC Research and Development and LSI Logic jointly
received the Queen's Award for Enterprise, in the category of Innovation, for
the L64780 and L64781.
European Headquarters
United Kingdom
Tel: 44 1344 426544
Fax: 44 1344 481039
LSI Logic KK Headquarters
Tokyo, Japan
Tel: 81 3 5463 7165
Fax 81 3 5463 7820
LSI: Logic web site:
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or registered trademarks of LSI Logic Corporation.
All other brand and product names may be trademarks of their respective companies.
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changes to any products and services herein at
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Copyright ©2002 by LSI Logic Corporation.
All rights reserved.
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