FI923975A - TV SAENDNINGSSYSTEM - Google Patents

TV SAENDNINGSSYSTEM Download PDF

Info

Publication number
FI923975A
FI923975A FI923975A FI923975A FI923975A FI 923975 A FI923975 A FI 923975A FI 923975 A FI923975 A FI 923975A FI 923975 A FI923975 A FI 923975A FI 923975 A FI923975 A FI 923975A
Authority
FI
Finland
Prior art keywords
disturbances
additional data
colour
amplitude
transmitted
Prior art date
Application number
FI923975A
Other languages
Finnish (fi)
Other versions
FI923975A0 (en
Inventor
Martin Plantholt
Original Assignee
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=FI923975(A) "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 Thomson Brandt Gmbh filed Critical Thomson Brandt Gmbh
Publication of FI923975A publication Critical patent/FI923975A/en
Publication of FI923975A0 publication Critical patent/FI923975A0/en

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

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.
FI923975A 1990-03-07 1992-09-04 TV SAENDNINGSSYSTEM. FI923975A0 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
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
PCT/EP1991/000397 WO1991014346A1 (en) 1990-03-07 1991-03-02 Television broadcasting system

Publications (2)

Publication Number Publication Date
FI923975A true FI923975A (en) 1992-09-04
FI923975A0 FI923975A0 (en) 1992-09-04

Family

ID=25890851

Family Applications (1)

Application Number Title Priority Date Filing Date
FI923975A FI923975A0 (en) 1990-03-07 1992-09-04 TV SAENDNINGSSYSTEM.

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)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2099127T3 (en) * 1990-06-06 1997-05-16 Philips Electronics Nv EXTENDED TELEVISION SYSTEM WITH MAILBOX PROCEDURE.
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

Family Cites Families (4)

* 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
US4882614A (en) * 1986-07-14 1989-11-21 Matsushita Electric Industrial Co., Ltd. Multiplex signal processing apparatus
US5053859A (en) * 1987-09-02 1991-10-01 Scientific-Atlanta, Inc. High definition B-MAC television signal transmission system
DE3930964A1 (en) * 1989-09-15 1991-03-28 Thomson Brandt Gmbh TELEVISION TRANSMISSION SYSTEM

Also Published As

Publication number Publication date
NO179350C (en) 1996-09-18
ES2082199T3 (en) 1996-03-16
HUT63724A (en) 1993-09-28
GR3018339T3 (en) 1996-03-31
EP0518946A1 (en) 1992-12-23
KR100212384B1 (en) 1999-08-02
JPH05505076A (en) 1993-07-29
DK0518946T3 (en) 1996-02-12
HK112396A (en) 1996-07-05
DE59107039D1 (en) 1996-01-18
MY108674A (en) 1996-10-31
AU7455491A (en) 1991-10-10
CN1027486C (en) 1995-01-18
ATE131336T1 (en) 1995-12-15
NO179350B (en) 1996-06-10
EP0518946B1 (en) 1995-12-06
FI923975A0 (en) 1992-09-04
NO923460D0 (en) 1992-09-04
NO923460L (en) 1992-09-04
WO1991014346A1 (en) 1991-09-19
AU642725B2 (en) 1993-10-28
BR9106110A (en) 1993-02-24
CN1054696A (en) 1991-09-18

Similar Documents

Publication Publication Date Title
MY109495A (en) Modulator/demodulator for compatible high definition television system
KR930702863A (en) NTSC Common Channel Interference Reduced VSB HDTV Transmission System
MY115343A (en) Carrier independent timing recovery system for a vestigial sideband modulated signal
KR890702390A (en) Television Signal Processing and Reception System
WO1991002431A3 (en) Transmitting auxiliary information in a television signal
WO2000027066A3 (en) Dual mode qam/vsb receiver
KR890007593A (en) Method and apparatus for transmitting video signal and system for generating high definition TV signal
FI923975A0 (en) TV SAENDNINGSSYSTEM.
US5534932A (en) Letterbox television system
FI895585A0 (en) Frequency generation for extended bandwidth television
KR880013393A (en) Demodulation Circuit for TV Voice Multiple Signals
GR3006920T3 (en)
US5402489A (en) Scrambled video signal transmission system with pulse-code modulated subcarrier
Sherratt et al. The concept of a new video detector for ghosted IF signals
ES405934A1 (en) Colour tv receivers
IT1248029B (en) Process of extracting a signal synchronous with the frequency of an amplitude- or angle-modulated carrier
KR890011451A (en) TV broadcasting system
AU6635390A (en) Process for transmitting a colour television signal
JPH0460393B2 (en)
GB1044091A (en) Improvements in or relating to circuit arrangements for restoring the missing sideband portion of a partially single-sideband electrical signal
KR910700592A (en) Color tv transmission system
JPH04176287A (en) Orthogonal multiple signal processing system and transmitting/receiving device
KR950016223A (en) NTSC Digital Color Demodulation Apparatus and Method
KR830002473A (en) TV set