AU642725B2 - Television broadcasting system - Google Patents

Television broadcasting system

Info

Publication number
AU642725B2
AU642725B2 AU74554/91A AU7455491A AU642725B2 AU 642725 B2 AU642725 B2 AU 642725B2 AU 74554/91 A AU74554/91 A AU 74554/91A AU 7455491 A AU7455491 A AU 7455491A AU 642725 B2 AU642725 B2 AU 642725B2
Authority
AU
Australia
Prior art keywords
disturbances
additional data
colour
amplitude
transmitted
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.)
Ceased
Application number
AU74554/91A
Other versions
AU7455491A (en
Inventor
Martin Plantholt
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.)
Deutsche Thomson Brandt GmbH
Original Assignee
Deutsche Thomson Brandt GmbH
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=25890851&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=AU642725(B2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Priority claimed from DE4007092A external-priority patent/DE4007092A1/en
Priority claimed from DE4021698A external-priority patent/DE4021698A1/en
Application filed by Deutsche Thomson Brandt GmbH filed Critical Deutsche Thomson Brandt GmbH
Publication of AU7455491A publication Critical patent/AU7455491A/en
Application granted granted Critical
Publication of AU642725B2 publication Critical patent/AU642725B2/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/007—Systems with supplementary picture signal insertion during a portion of the active part of a television signal, e.g. during top and bottom lines in a HDTV letter-box system
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N11/00—Colour television systems
    • H04N11/06—Transmission systems characterised by the manner in which the individual colour picture signal components are combined
    • H04N11/12—Transmission systems characterised by the manner in which the individual colour picture signal components are combined using simultaneous signals only
    • H04N11/14—Transmission systems characterised by the manner in which the individual colour picture signal components are combined using simultaneous signals only in which one signal, modulated in phase and amplitude, conveys colour information and a second signal conveys brightness information, e.g. NTSC-system
    • H04N11/16—Transmission systems characterised by the manner in which the individual colour picture signal components are combined using simultaneous signals only in which one signal, modulated in phase and amplitude, conveys colour information and a second signal conveys brightness information, e.g. NTSC-system the chrominance signal alternating in phase, e.g. PAL-system
    • H04N11/167—Transmission systems characterised by the manner in which the individual colour picture signal components are combined using simultaneous signals only in which one signal, modulated in phase and amplitude, conveys colour information and a second signal conveys brightness information, e.g. NTSC-system the chrominance signal alternating in phase, e.g. PAL-system a resolution-increasing signal being multiplexed to the PAL-system signal, e.g. PAL-PLUS-system
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N11/00—Colour television systems
    • H04N11/24—High-definition television systems
    • H04N11/28—High-definition television systems involving bandwidth reduction, e.g. subsampling

Landscapes

  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Engineering & Computer Science (AREA)
  • Color Television Systems (AREA)
  • Television Systems (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Closed-Circuit Television Systems (AREA)
  • Lubrication Of Internal Combustion Engines (AREA)
  • Fire-Extinguishing Compositions (AREA)
  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
  • Details Of Television Systems (AREA)
  • Measurement And Recording Of Electrical Phenomena And Electrical Characteristics Of The Living Body (AREA)
  • Telephonic Communication Services (AREA)
  • Studio Devices (AREA)

Abstract

In the letterbox colour television system, additional data are transmitted with an appreciably reduced amplitude for reasons of compatibility, low frequency components having a relatively high amplitude. This results, however, in a reduction in the signal-to-noise ratio and disturbances in synchronization occur in known television receivers. The amplitude of the additional data can be increased without the disturbances in synchronization that occur in known television receivers if the additional data are transmitted in the form of a vestigial sideband modulation of the colour carrier. The frequency response of known IF filters can be exploited advantageously to form a Nyquist flank on the colour carrier. If the phase used is a constant V-phase of the colour carrier, any disturbances in the compatible reception are advantageously slight.
AU74554/91A 1990-03-07 1991-03-02 Television broadcasting system Ceased AU642725B2 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE4007092 1990-03-07
DE4007092A DE4007092A1 (en) 1990-03-07 1990-03-07 TV video signal transmission system of letter-box type - modulates chrominance carrier by extra information signals using filters
DE4021698A DE4021698A1 (en) 1990-07-07 1990-07-07 Letter-box colour television system
DE4021698 1990-07-07

Publications (2)

Publication Number Publication Date
AU7455491A AU7455491A (en) 1991-10-10
AU642725B2 true AU642725B2 (en) 1993-10-28

Family

ID=25890851

Family Applications (1)

Application Number Title Priority Date Filing Date
AU74554/91A Ceased AU642725B2 (en) 1990-03-07 1991-03-02 Television broadcasting system

Country Status (17)

Country Link
EP (1) EP0518946B1 (en)
JP (1) JPH05505076A (en)
KR (1) KR100212384B1 (en)
CN (1) CN1027486C (en)
AT (1) ATE131336T1 (en)
AU (1) AU642725B2 (en)
BR (1) BR9106110A (en)
DE (1) DE59107039D1 (en)
DK (1) DK0518946T3 (en)
ES (1) ES2082199T3 (en)
FI (1) FI923975A0 (en)
GR (1) GR3018339T3 (en)
HK (1) HK112396A (en)
HU (1) HUT63724A (en)
MY (1) MY108674A (en)
NO (1) NO179350C (en)
WO (1) WO1991014346A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU647792B2 (en) * 1990-06-06 1994-03-31 Philips Electronics N.V. Letterbox extended television system

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4111979A1 (en) 1991-04-12 1992-10-15 Thomson Brandt Gmbh DEVICE FOR IMAGE SIGNAL RECORDING AND / OR PLAYBACK
EP0543038A1 (en) * 1991-11-19 1993-05-26 Samsung Electronics Co., Ltd. Color-under chroma channel encoded with auxiliary signals

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU582053B2 (en) * 1986-07-14 1989-03-09 Matsushita Electric Industrial Co., Ltd. Multiplex signal processing apparatus
AU6294790A (en) * 1989-09-15 1991-04-18 Deutsche Thomson-Brandt Gmbh Tv transmission system
AU626765B2 (en) * 1988-10-11 1992-08-06 Scientific-Atlanta, Inc. High definition b-mac television signal transmission system

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3414452C1 (en) * 1984-04-17 1985-10-10 Robert Bosch Gmbh, 7000 Stuttgart Method for compatibly transmitting a colour television signal containing additional information

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU582053B2 (en) * 1986-07-14 1989-03-09 Matsushita Electric Industrial Co., Ltd. Multiplex signal processing apparatus
AU626765B2 (en) * 1988-10-11 1992-08-06 Scientific-Atlanta, Inc. High definition b-mac television signal transmission system
AU6294790A (en) * 1989-09-15 1991-04-18 Deutsche Thomson-Brandt Gmbh Tv transmission system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU647792B2 (en) * 1990-06-06 1994-03-31 Philips Electronics N.V. Letterbox extended television system

Also Published As

Publication number Publication date
DE59107039D1 (en) 1996-01-18
BR9106110A (en) 1993-02-24
ES2082199T3 (en) 1996-03-16
KR100212384B1 (en) 1999-08-02
GR3018339T3 (en) 1996-03-31
NO923460L (en) 1992-09-04
AU7455491A (en) 1991-10-10
WO1991014346A1 (en) 1991-09-19
FI923975A (en) 1992-09-04
DK0518946T3 (en) 1996-02-12
HK112396A (en) 1996-07-05
EP0518946B1 (en) 1995-12-06
EP0518946A1 (en) 1992-12-23
CN1054696A (en) 1991-09-18
NO923460D0 (en) 1992-09-04
HUT63724A (en) 1993-09-28
CN1027486C (en) 1995-01-18
MY108674A (en) 1996-10-31
NO179350B (en) 1996-06-10
JPH05505076A (en) 1993-07-29
NO179350C (en) 1996-09-18
FI923975A0 (en) 1992-09-04
ATE131336T1 (en) 1995-12-15

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Legal Events

Date Code Title Description
MK14 Patent ceased section 143(a) (annual fees not paid) or expired