L64704 LSI Logic Corporation, L64704 Datasheet - Page 17

• Manufacturer Part Number: L64704
• Description: Satellite Decoder Technical Manual 5/97
• Manufacturer: LSI Logic Corporation

1.1
General
Description
Chapter 1
Introduction
This chapter introduces the L64704 Satellite Decoder from LSI Logic.
The L64704 is designed specifically to meet the needs of satellite broad-
cast digital TV.
The sections in this chapter are:
The L64704 Satellite Decoder contains two main blocks: a BPSK/QPSK
Demodulator and a Concatenated FEC decoder.
The BPSK/QPSK module performs binary and quadrature phase-shift
keying (BPSK/QPSK) demodulation, a method of extracting a digital sig-
nal from a phase-modulated analog signal. The BPSK/QPSK module is
designed specifically for a satellite broadcast digital TV receiver, and is
compliant with the European digital video broadcast (DVB) standard
(DTVB 1110 Rev. 7).
The FEC Decoder pipeline is a complete concatenated Forward Error
Correction decoder that utilizes a Viterbi inner code and a Reed-Solomon
outer code. The FEC decoding pipeline also contains all of the necessary
synchronization, deinterleaving, and scrambling functions for a complete
decoding solution.
The L64704 is compliant with specifications of the “Baseline
Modulation/Channel Coding System” by the Digital Video Broadcast
Section 1.1, “General Description,”
tecture of the L64704 Satellite Decoder.
Section 1.2, “Typical Application,”
in a typical satellite decoder system.
Section 1.3, “Features Summary,”
the L64704.
describes how the L64704 is used
summarizes the main features of
provides an overview of the archi-
1-1