CA2267679A1 - Ntsc co-channel interference detectors responsive to received q-channel signals in digital tv signal receivers - Google Patents

Ntsc co-channel interference detectors responsive to received q-channel signals in digital tv signal receivers

Info

Publication number
CA2267679A1
CA2267679A1 CA002267679A CA2267679A CA2267679A1 CA 2267679 A1 CA2267679 A1 CA 2267679A1 CA 002267679 A CA002267679 A CA 002267679A CA 2267679 A CA2267679 A CA 2267679A CA 2267679 A1 CA2267679 A1 CA 2267679A1
Authority
CA
Canada
Prior art keywords
received
channel
ntsc
signal
channel signal
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
CA002267679A
Other languages
French (fr)
Other versions
CA2267679C (en
Inventor
Allen Leroy Limberg
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.)
Samsung Electronics Co Ltd
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 CA2267679A1 publication Critical patent/CA2267679A1/en
Application granted granted Critical
Publication of CA2267679C publication Critical patent/CA2267679C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • 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
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/04—Systems for the transmission of one television signal, i.e. both picture and sound, by a single carrier
    • 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
    • H04L1/0054—Maximum-likelihood or sequential decoding, e.g. Viterbi, Fano, ZJ algorithms
    • 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
    • H04N5/00—Details of television systems
    • H04N5/14—Picture signal circuitry for video frequency region
    • H04N5/21—Circuitry for suppressing or minimising disturbance, e.g. moiré or halo
    • 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
    • H04N5/455—Demodulation-circuits
    • 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
    • H04N5/00—Details of television systems
    • H04N5/14—Picture signal circuitry for video frequency region
    • H04N5/21—Circuitry for suppressing or minimising disturbance, e.g. moiré or halo
    • H04N5/211—Ghost signal cancellation

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Artificial Intelligence (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Noise Elimination (AREA)

Abstract

An NTSC co-channel interference detector detects the presence of an interfering NTSC signal in the received Q-channel signal that is orthogonal to the received I-channel signal, rather than detecting the presence of an interfering NTSC
signal in the received T-channel signal. By determining whether or not a significant amount of NTSC co-channel interference accompanies the received Q-channel signal, it is inferentially determined whether or not a significant amount of NTSC co-channel interference accompanies the received I-channel signal, such as to cause too many errors in the trellis decoding of equalized received I-channel signal to be corrected by the Reed-Solomon decoder following the trellis decoder. The accurate determination of co-channel NTSC interference levels is simplified, because essentially no direct bias arises from the quadrature-phase synchronous detection of the pilot carrier of the VSB AM digital television signal.
CA002267679A 1996-10-02 1997-10-02 Ntsc co-channel interference detectors responsive to received q-channel signals in digital tv signal receivers Expired - Fee Related CA2267679C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US72479996A 1996-10-02 1996-10-02
US08/724,799 1996-10-02
PCT/US1997/016931 WO1998015120A1 (en) 1996-10-02 1997-10-02 Ntsc co-channel interference detectors responsive to received q-channel signals in digital tv signal receivers

Publications (2)

Publication Number Publication Date
CA2267679A1 true CA2267679A1 (en) 1998-04-09
CA2267679C CA2267679C (en) 2005-02-08

Family

ID=24911961

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002267679A Expired - Fee Related CA2267679C (en) 1996-10-02 1997-10-02 Ntsc co-channel interference detectors responsive to received q-channel signals in digital tv signal receivers

Country Status (4)

Country Link
KR (1) KR20000048803A (en)
CN (1) CN1115875C (en)
CA (1) CA2267679C (en)
WO (1) WO1998015120A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100893421B1 (en) * 2001-04-16 2009-04-17 톰슨 라이센싱 Demodulator for high definition television receiver
US20090185648A1 (en) * 2008-01-22 2009-07-23 Guo-Hau Gau Methods and devices for processing signals transmitted via communication system
CN112399097B (en) * 2019-08-13 2024-01-19 深圳Tcl数字技术有限公司 Signal interference processing method, digital television and storage medium

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5479449A (en) * 1994-05-04 1995-12-26 Samsung Electronics Co. Ltd. Digital VSB detector with bandpass phase tracker, as for inclusion in an HDTV receiver.
US5546132A (en) * 1994-12-07 1996-08-13 Goldstar Co., Ltd. NTSC interference detector

Also Published As

Publication number Publication date
CA2267679C (en) 2005-02-08
WO1998015120A1 (en) 1998-04-09
CN1232591A (en) 1999-10-20
KR20000048803A (en) 2000-07-25
CN1115875C (en) 2003-07-23

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Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed

Effective date: 20171002

MKLA Lapsed

Effective date: 20171002