FR2302644A1 - Modification of television sound signal - is by conversion of sound signal standard without affecting vision signal and is for cable transmission (OE150576) - Google Patents

Modification of television sound signal - is by conversion of sound signal standard without affecting vision signal and is for cable transmission (OE150576)

Info

Publication number
FR2302644A1
FR2302644A1 FR7605256A FR7605256A FR2302644A1 FR 2302644 A1 FR2302644 A1 FR 2302644A1 FR 7605256 A FR7605256 A FR 7605256A FR 7605256 A FR7605256 A FR 7605256A FR 2302644 A1 FR2302644 A1 FR 2302644A1
Authority
FR
France
Prior art keywords
sound signal
frequency
modification
conversion
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
FR7605256A
Other languages
French (fr)
Other versions
FR2302644B1 (en
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Publication of FR2302644A1 publication Critical patent/FR2302644A1/en
Application granted granted Critical
Publication of FR2302644B1 publication Critical patent/FR2302644B1/fr
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/10—Adaptations for transmission by electrical cable
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/01—Conversion of standards, e.g. involving analogue television standards or digital television standards processed at pixel level

Abstract

The modifier circuit consists of a separation stage (3, 4, 5) which separates sound frequency from vision frequency. Modulator (7) with oscillator (8) converts sound carrier to intermediate frequency, amplified and band-limited by stages (9, 10, 11). Frequency displacement is achieved by an oscillator (13) and a modulator (12) to change the level relative to vision adjusted by a control (15). Enables different transmission standards to be received on a common aerial and to converted to the same frequency separation or to relative levels for reception by a standard receiver.
FR7605256A 1975-02-27 1976-02-25 Modification of television sound signal - is by conversion of sound signal standard without affecting vision signal and is for cable transmission (OE150576) Granted FR2302644A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT150675A AT341595B (en) 1975-02-27 1975-02-27 DEVICE FOR INFLUENCING THE SOUND CARRIER OF TELEVISION SIGNALS

Publications (2)

Publication Number Publication Date
FR2302644A1 true FR2302644A1 (en) 1976-09-24
FR2302644B1 FR2302644B1 (en) 1981-06-19

Family

ID=3515216

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7605256A Granted FR2302644A1 (en) 1975-02-27 1976-02-25 Modification of television sound signal - is by conversion of sound signal standard without affecting vision signal and is for cable transmission (OE150576)

Country Status (5)

Country Link
AT (1) AT341595B (en)
BE (1) BE839029A (en)
CH (1) CH603015A5 (en)
DE (1) DE2606985A1 (en)
FR (1) FR2302644A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI63508C (en) * 1981-02-11 1983-06-10 Salora Oy KOPPLING VID EN TELEVISIONSMOTTAGARE FOER DETEKTERING AV LJUDSIGNALER SOM SAENTS ENLIGT OLIKA SAENDNINGSNORMER
US4536798A (en) * 1983-06-20 1985-08-20 Motorola, Inc. Volume control for CATV and method therefor
DE4140029A1 (en) * 1991-12-04 1993-06-09 Kurt Wolf Gmbh, 7547 Wildbad, De Reducing TV signal tone carrier frequency amplitude - splitting input signal into two partial TV signals and subjecting to modification before recombining to obtain cable TV signal

Also Published As

Publication number Publication date
ATA150675A (en) 1976-05-15
DE2606985A1 (en) 1976-09-16
AT341595B (en) 1978-02-10
CH603015A5 (en) 1978-08-15
FR2302644B1 (en) 1981-06-19
BE839029A (en) 1976-06-16

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Legal Events

Date Code Title Description
ST Notification of lapse