CA2094391A1 - Co-channel interference reduction system for digital high definition television - Google Patents

Co-channel interference reduction system for digital high definition television

Info

Publication number
CA2094391A1
CA2094391A1 CA2094391A CA2094391A CA2094391A1 CA 2094391 A1 CA2094391 A1 CA 2094391A1 CA 2094391 A CA2094391 A CA 2094391A CA 2094391 A CA2094391 A CA 2094391A CA 2094391 A1 CA2094391 A1 CA 2094391A1
Authority
CA
Canada
Prior art keywords
channel interference
high definition
reduction system
definition television
digital high
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
CA2094391A
Other languages
French (fr)
Other versions
CA2094391C (en
Inventor
Richard W. Citta
Carl G. Eilers
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.)
Zenith Electronics 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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=24406486&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=CA2094391(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Individual filed Critical Individual
Publication of CA2094391A1 publication Critical patent/CA2094391A1/en
Application granted granted Critical
Publication of CA2094391C publication Critical patent/CA2094391C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00Details of television systems
    • H04N5/14Picture signal circuitry for video frequency region
    • H04N5/21Circuitry for suppressing or minimising disturbance, e.g. moiré or halo
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B1/00Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/06Receivers
    • H04B1/10Means associated with receiver for limiting or suppressing noise or interference
    • H04B1/12Neutralising, balancing, or compensation arrangements
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00Baseband systems
    • H04L25/38Synchronous or start-stop systems, e.g. for Baudot code
    • H04L25/40Transmitting circuits; Receiving circuits
    • H04L25/49Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/41Structure of client; Structure of client peripherals
    • H04N21/426Internal components of the client ; Characteristics thereof
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00Television systems
    • H04N7/24Systems for the transmission of television signals using pulse code modulation
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00Baseband systems
    • H04L25/02Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/03Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
    • H04L25/03006Arrangements for removing intersymbol interference
    • H04L2025/0335Arrangements for removing intersymbol interference characterised by the type of transmission
    • H04L2025/03375Passband transmission
    • H04L2025/03382Single of vestigal sideband

Abstract

A co-channel interference reduction system for digital high definition television includes a transmitter having a modulo 4 processing precode filter. A receiver includes a pair of selectable video processing modes. The first mode provides a comb filter for removing co-channel interference signals together with a modulo 4 interpreter for restoring the four level data signal despite the interference signal introduces by the comb filter segment. In the alternate mode operable in the absence of co-channel interfering signals, a level slicer and postcoder are used to restore the precoded signal to the original four level data signal.
CA002094391A 1990-10-19 1991-10-15 Co-channel interference reduction system for digital high definition television Expired - Lifetime CA2094391C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US601,169 1990-10-19
US07/601,169 US5086340A (en) 1990-10-19 1990-10-19 Co-channel interference reduction system for digital high definition television
PCT/US1991/007697 WO1992007442A1 (en) 1990-10-19 1991-10-15 Co-channel interference reduction system for digital high definition television

Publications (2)

Publication Number Publication Date
CA2094391A1 true CA2094391A1 (en) 1992-04-20
CA2094391C CA2094391C (en) 1999-06-08

Family

ID=24406486

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002094391A Expired - Lifetime CA2094391C (en) 1990-10-19 1991-10-15 Co-channel interference reduction system for digital high definition television

Country Status (8)

Country Link
US (1) US5086340A (en)
EP (1) EP0553252B1 (en)
JP (1) JP2718824B2 (en)
KR (1) KR0142584B1 (en)
CA (1) CA2094391C (en)
DE (1) DE69126139T2 (en)
HK (1) HK1000988A1 (en)
WO (1) WO1992007442A1 (en)

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USRE42643E1 (en) 1991-03-27 2011-08-23 Panasonic Corporation Communication system
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USRE39890E1 (en) 1991-03-27 2007-10-23 Matsushita Electric Industrial Co., Ltd. Communication system
US5260793A (en) * 1991-07-18 1993-11-09 Zenith Electronics Corporation Receiver post coder selection circuit
US5802241A (en) 1992-03-26 1998-09-01 Matsushita Electric Industrial Co., Ltd. Communication system
US7158577B1 (en) 1992-03-26 2007-01-02 Matsushita Electric Industrial Co., Ltd. Communication system
CN1032099C (en) * 1992-03-26 1996-06-19 松下电器产业株式会社 System of communication
US5892879A (en) 1992-03-26 1999-04-06 Matsushita Electric Industrial Co., Ltd. Communication system for plural data streams
US6728467B2 (en) * 1992-03-26 2004-04-27 Matsushita Electric Industrial Co., Ltd. Communication system
US7894541B2 (en) * 1992-03-26 2011-02-22 Panasonic Corporation Communication system
US6724976B2 (en) 1992-03-26 2004-04-20 Matsushita Electric Industrial Co., Ltd. Communication system
USRE38513E1 (en) 1992-03-26 2004-05-11 Matsushita Electric Industrial Co., Ltd. Communication system
US5400084A (en) * 1992-05-14 1995-03-21 Hitachi America, Ltd. Method and apparatus for NTSC signal interference cancellation using recursive digital notch filters
US5325204A (en) * 1992-05-14 1994-06-28 Hitachi America, Ltd. Narrowband interference cancellation through the use of digital recursive notch filters
US5282023A (en) * 1992-05-14 1994-01-25 Hitachi America, Ltd. Apparatus for NTSC signal interference cancellation through the use of digital recursive notch filters
US5325188A (en) * 1992-05-14 1994-06-28 Hitachi America, Ltd. Apparatus for NTSC signal interference cancellation through the use of digital recursive notch filters
US5410569A (en) * 1992-08-19 1995-04-25 Zenith Electronics Corp. Data slicing system for HDTV receiver
US5438369A (en) * 1992-08-17 1995-08-01 Zenith Electronics Corporation Digital data interleaving system with improved error correctability for vertically correlated interference
US5453797A (en) * 1993-02-22 1995-09-26 Massachusetts Institute Of Technology Method and apparatus for decoding broadcast digital HDTV in the presence of quasi-cyclostationary interference
US5619534A (en) * 1993-05-07 1997-04-08 Philips Electronics North America Corporatioin Method and apparatus for reducing precoding loss when using a post-comb filtering approach to reduce co-channel interference in high definition television transmission
US5565926A (en) * 1993-05-07 1996-10-15 Philips Electronics North America Corporation Method and apparatus for communicating digital television signals using a signal constellation formed by four signal constellations placed in the quadrants
US5452015A (en) * 1994-02-10 1995-09-19 Philips Electronics North America Corporation Method and apparatus for combating co-channel NTSC interference for digital TV transmission
US5572249A (en) * 1994-07-07 1996-11-05 Philips Electronics North America Corporation Method and apparatus for optimal NTSC rejection filtering and transmitter and receiver comprising same
US5583889A (en) * 1994-07-08 1996-12-10 Zenith Electronics Corporation Trellis coded modulation system for HDTV
KR100320449B1 (en) * 1994-12-16 2002-05-13 구자홍 Interference discrimination device of NCC adjacent channel in high definition receiver
US5510845A (en) * 1994-12-23 1996-04-23 Samsung Electronics Co., Ltd. Receivers for digital signals buried within the trace and retrace intervals of NTSC television signals
US5572262A (en) * 1994-12-29 1996-11-05 Philips Electronics North America Corporation Receiver based methods and devices for combating co-channel NTSC interference in digital transmission
US5602583A (en) * 1995-02-10 1997-02-11 Zenith Electronics Corporation NTSC rejection filter with switched tomlinson precoder for reducing NTSC co-channel interference in ATV receivers
US5648822A (en) * 1995-05-19 1997-07-15 Philips Electronics North America Corporation Method and apparatus for combating co-channel NTSC interference using a variable-comb filter for digital TV transmission
US5594496A (en) * 1995-06-07 1997-01-14 Zenith Electronics Corporation Detection of co-channel interference in digital television signals
KR0172885B1 (en) * 1995-08-25 1999-03-20 구자홍 Integrated trellis decoder for hdtv
US5923711A (en) * 1996-04-02 1999-07-13 Zenith Electronics Corporation Slice predictor for a signal receiver
KR0170345B1 (en) * 1996-06-11 1999-03-20 김광호 Auto-gain control circuit and method of hdtv receiver
US6084642A (en) * 1996-10-07 2000-07-04 Zenith Electronics Corporation Receiver for adjusting sync levels in VSB systems
US5848108A (en) * 1996-11-29 1998-12-08 Northern Telecom Limited Selective filtering for co-channel interference reduction
KR100247967B1 (en) * 1997-07-09 2000-03-15 윤종용 Co-channel interference detector and method terefor
KR100238311B1 (en) * 1997-08-04 2000-01-15 윤종용 Co-channel interference canceller and method therefor
CN1148958C (en) 1998-02-06 2004-05-05 齐尼思电子公司 VSB encoder and RF modulator for digital television receiver
US6667760B1 (en) * 1998-02-20 2003-12-23 Samsung Electronics Co., Ltd. Receiver for digital television signals having carriers near upper frequency boundaries of TV broadcasting channels
FI115864B (en) * 1999-09-06 2005-07-29 Nokia Corp Serial interface and method for transferring digital data over a serial interface
US7109939B2 (en) * 2002-05-14 2006-09-19 Hrl Laboratories, Llc Wideband antenna array
US7940839B2 (en) * 2004-01-26 2011-05-10 Diablo Technologies Inc. Fully adaptive equalization for high loss communications channels
KR100721776B1 (en) * 2005-07-20 2007-05-25 노키아 코포레이션 Method, system and network entity for providing digital broadband transmission
US7693501B2 (en) * 2006-12-21 2010-04-06 Intel Corporation Techniques to deterministically reduce signal interference
US20110166968A1 (en) * 2010-01-06 2011-07-07 Richard Yin-Ching Houng System and method for activating display device feature
US8938041B2 (en) 2012-12-18 2015-01-20 Intel Corporation Techniques for managing interference in multiple channel communications system

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Also Published As

Publication number Publication date
DE69126139T2 (en) 1997-11-27
KR0142584B1 (en) 1998-07-15
EP0553252B1 (en) 1997-05-14
CA2094391C (en) 1999-06-08
WO1992007442A1 (en) 1992-04-30
JPH06502520A (en) 1994-03-17
DE69126139D1 (en) 1997-06-19
KR930702855A (en) 1993-09-09
EP0553252A1 (en) 1993-08-04
HK1000988A1 (en) 1998-05-15
US5086340A (en) 1992-02-04
JP2718824B2 (en) 1998-02-25

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Legal Events

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EEER Examination request
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MKEX Expiry

Effective date: 20111015