CA2177137A1 - Memory efficient method and apparatus for sync detection - Google Patents

Memory efficient method and apparatus for sync detection

Info

Publication number
CA2177137A1
CA2177137A1 CA002177137A CA2177137A CA2177137A1 CA 2177137 A1 CA2177137 A1 CA 2177137A1 CA 002177137 A CA002177137 A CA 002177137A CA 2177137 A CA2177137 A CA 2177137A CA 2177137 A1 CA2177137 A1 CA 2177137A1
Authority
CA
Canada
Prior art keywords
circuitry
synchronization
data
deinterleaving
memory
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002177137A
Other languages
French (fr)
Other versions
CA2177137C (en
Inventor
Tsai Lo
Randy K. Munich
Paul D. Nicholas
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Scientific Atlanta LLC
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of CA2177137A1 publication Critical patent/CA2177137A1/en
Application granted granted Critical
Publication of CA2177137C publication Critical patent/CA2177137C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/24—Systems for the transmission of television signals using pulse code modulation
    • H04N7/52—Systems for transmission of a pulse code modulated video signal with one or more other pulse code modulated signals, e.g. an audio signal or a synchronizing signal
    • H04N7/54—Systems for transmission of a pulse code modulated video signal with one or more other pulse code modulated signals, e.g. an audio signal or a synchronizing signal the signals being synchronous
    • H04N7/56—Synchronising systems therefor
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
    • H04L1/0045—Arrangements at the receiver end
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
    • H04L1/0045—Arrangements at the receiver end
    • H04L1/0052—Realisations of complexity reduction techniques, e.g. pipelining or use of look-up tables
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
    • H04L1/0056—Systems characterized by the type of code used
    • H04L1/0057—Block codes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
    • H04L1/0056—Systems characterized by the type of code used
    • H04L1/0071—Use of interleaving
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/41—Structure of client; Structure of client peripherals
    • H04N21/426—Internal components of the client ; Characteristics thereof
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/438—Interfacing the downstream path of the transmission network originating from a server, e.g. retrieving MPEG packets from an IP network
    • H04N21/4383—Accessing a communication channel
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/443—OS processes, e.g. booting an STB, implementing a Java virtual machine in an STB or power management in an STB
    • H04N21/4435—Memory management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards

Abstract

A receiver (79) is provided for receiving a digital data stream over a communication path. The digital data is arranged as a sequence of frames, each frame including a plurality of lines of data. The beginning of each frame is indicated by a frame synchronization word (42); the beginning of each line is indicated by a horizontal synchronization byte (46). The data is interleaved by an encoder (162) prior to transmission. The decoder (79-82, 84, 86, 88) contains circuitry (92) for locating the horizontal and frame synchronization data and contains circuitry (96) for deinterleaving the digital data. Both the synchronization locating circuitry and deinterleaving circuitry require access to a memory (86), but not at the same time. Therefore, a single memory is used with the synchronization recovery circuitry and deinterleaving circuitry alternatively addressing the memory.
CA002177137A 1993-12-03 1994-12-05 Memory efficient method and apparatus for sync detection Expired - Lifetime CA2177137C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US08/160,841 US5420640A (en) 1993-12-03 1993-12-03 Memory efficient method and apparatus for sync detection
US08/160,841 1993-12-03
PCT/US1994/013666 WO1995015645A1 (en) 1993-12-03 1994-12-05 Memory efficient method and apparatus for sync detection

Publications (2)

Publication Number Publication Date
CA2177137A1 true CA2177137A1 (en) 1995-06-08
CA2177137C CA2177137C (en) 2004-04-06

Family

ID=22578686

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002177137A Expired - Lifetime CA2177137C (en) 1993-12-03 1994-12-05 Memory efficient method and apparatus for sync detection

Country Status (8)

Country Link
US (1) US5420640A (en)
EP (1) EP0732025A4 (en)
KR (1) KR960706740A (en)
AU (1) AU1295795A (en)
CA (1) CA2177137C (en)
MA (1) MA23387A1 (en)
TW (1) TW288246B (en)
WO (1) WO1995015645A1 (en)

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US5710783A (en) * 1995-06-07 1998-01-20 Luthi; Daniel A. Optimization of synchronization control in concatenated decoders
US5835165A (en) * 1995-06-07 1998-11-10 Lsi Logic Corporation Reduction of false locking code words in concatenated decoders
KR0147661B1 (en) * 1995-08-30 1998-09-15 김광호 Detect circuit and method of data segment synchronization
US6415398B1 (en) 1995-09-29 2002-07-02 Kabushiki Kaisha Toshiba Coding system and decoding system
US6493838B1 (en) 1995-09-29 2002-12-10 Kabushiki Kaisha Toshiba Coding apparatus and decoding apparatus for transmission/storage of information
US6571361B1 (en) * 1995-09-29 2003-05-27 Kabushiki Kaisha Toshiba Encoder and decoder
US5862153A (en) * 1995-09-29 1999-01-19 Kabushiki Kaisha Toshiba Coding apparatus and decoding apparatus for transmission/storage of information
US5966120A (en) * 1995-11-21 1999-10-12 Imedia Corporation Method and apparatus for combining and distributing data with pre-formatted real-time video
JPH09266499A (en) * 1996-01-26 1997-10-07 Oki Electric Ind Co Ltd Digital demodulating circuit, maximum detecting circuit, and reception device
US5996103A (en) * 1996-07-31 1999-11-30 Samsung Information Systems America Apparatus and method for correcting errors in a communication system
US5812603A (en) * 1996-08-22 1998-09-22 Lsi Logic Corporation Digital receiver using a concatenated decoder with error and erasure correction
US5953636A (en) * 1996-10-30 1999-09-14 Lsi Logic Corporation Single-chip DBS receiver
JPH10303854A (en) * 1997-04-23 1998-11-13 Matsushita Electric Ind Co Ltd De-interleave device
GB2332345B (en) * 1997-12-09 2002-12-11 Sony Uk Ltd A digital video receiver a conditional access module and a method of transmitting data therebetween
US20040160906A1 (en) 2002-06-21 2004-08-19 Aware, Inc. Multicarrier transmission system with low power sleep mode and rapid-on capability
JP3359291B2 (en) * 1998-07-17 2002-12-24 株式会社ケンウッド Deinterleave circuit
EP1061746A1 (en) 1999-06-14 2000-12-20 Sony International (Europe) GmbH Channel decoder for a digital broadcast receiver
US6741659B1 (en) 1999-10-25 2004-05-25 Freesystems Pte. Ltd. Wireless infrared digital audio transmitting system
US6614849B1 (en) 1999-10-25 2003-09-02 Free Systems Pte. Ltd. Wireless infrared digital audio receiving system
US6510182B1 (en) 1999-10-25 2003-01-21 Freesystems Pte. Ltd. Wireless infrared digital audio system
US6961369B1 (en) 1999-11-09 2005-11-01 Aware, Inc. System and method for scrambling the phase of the carriers in a multicarrier communications system
ATE343879T1 (en) 2000-01-07 2006-11-15 Aware Inc DIAGNOSTIC METHODS AND SYSTEMS FOR MULTI CARRIER MODEMS
WO2003032555A2 (en) 2001-10-05 2003-04-17 Aware, Inc. Systems and methods for multi-pair atm over dsl
KR100546398B1 (en) * 2003-11-25 2006-01-26 삼성전자주식회사 Method for searching sync word in the encoded audio bitstream and computer readable medium thereof
JP4158701B2 (en) * 2003-12-26 2008-10-01 松下電工株式会社 Video transmission system
WO2005086405A2 (en) 2004-03-03 2005-09-15 Aware, Inc. Impulse noise management
US7283176B2 (en) * 2004-03-12 2007-10-16 Broadcom Corporation Method and system for detecting field ID
ATE517477T1 (en) 2004-09-25 2011-08-15 Aware Inc CRC COUNTER NORMALIZATION
CA2869452C (en) 2004-10-12 2016-01-19 Tq Delta, Llc Resource sharing in a telecommunications environment
US7796705B2 (en) 2004-10-15 2010-09-14 Aware, Inc. DMT symbol repetition in the presence of impulse noise
EP2173071B1 (en) 2006-04-12 2013-06-26 TQ Delta, LLC Packet retransmission and memory sharing
KR100805814B1 (en) * 2006-12-08 2008-02-21 한국전자통신연구원 A frame synchronization and structure detection method in dvb-s2 system
US20110166968A1 (en) * 2010-01-06 2011-07-07 Richard Yin-Ching Houng System and method for activating display device feature
US8769373B2 (en) 2010-03-22 2014-07-01 Cleon L. Rogers, JR. Method of identifying and protecting the integrity of a set of source data
KR101135871B1 (en) * 2010-05-07 2012-04-19 주식회사 실리콘웍스 Boost converter for liquid crystal display

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Also Published As

Publication number Publication date
EP0732025A1 (en) 1996-09-18
MA23387A1 (en) 1995-07-01
WO1995015645A1 (en) 1995-06-08
US5420640A (en) 1995-05-30
TW288246B (en) 1996-10-11
EP0732025A4 (en) 1997-02-26
AU1295795A (en) 1995-06-19
CA2177137C (en) 2004-04-06
KR960706740A (en) 1996-12-09

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Legal Events

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EEER Examination request
MKEX Expiry

Effective date: 20141205

MKEX Expiry

Effective date: 20141205