GB1391290A - Four channel stereophonic system - Google Patents

Four channel stereophonic system

Info

Publication number
GB1391290A
GB1391290A GB5457873A GB5457873A GB1391290A GB 1391290 A GB1391290 A GB 1391290A GB 5457873 A GB5457873 A GB 5457873A GB 5457873 A GB5457873 A GB 5457873A GB 1391290 A GB1391290 A GB 1391290A
Authority
GB
United Kingdom
Prior art keywords
subcarrier
filter
sideband
frequency
channel stereophonic
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.)
Expired
Application number
GB5457873A
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.)
General Electric Co
Original Assignee
General Electric Co
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
Priority claimed from US05/311,195 external-priority patent/US3934092A/en
Application filed by General Electric Co filed Critical General Electric Co
Publication of GB1391290A publication Critical patent/GB1391290A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
    • H04H20/86—Arrangements characterised by the broadcast information itself
    • H04H20/88—Stereophonic broadcast systems
    • H04H20/89—Stereophonic broadcast systems using three or more audio channels, e.g. triphonic or quadraphonic

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Transmitters (AREA)
  • Stereo-Broadcasting Methods (AREA)

Abstract

1391290 Stereophonic broadcasting systems GENERAL ELECTRIC CO 23 Nov 1973 [1 Dec 1972] 54578/73 Addition to 1391289 Heading H4L The transmitter of the parent Specification 1,391,289 for transmitting four stereophonically related signals, in which the input to the main carrier frequency modulator includes a filter for removing all but a relatively small portion of the upper sideband of the third (76 kHz) subcarrier and for attenuating the uppermost portion of the lower sideband of the third subcarrier is arranged so that the filter has a centre frequency at about the lower edge of the lower sideband of the third subcarrier and an upper skirt which provides an attenuation of about 6 db. at the frequency of the third subcarrier.
GB5457873A 1972-12-01 1973-11-23 Four channel stereophonic system Expired GB1391290A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/311,195 US3934092A (en) 1971-09-21 1972-12-01 Four channel stereophonic broadcasting system

Publications (1)

Publication Number Publication Date
GB1391290A true GB1391290A (en) 1975-04-23

Family

ID=23205826

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5457873A Expired GB1391290A (en) 1972-12-01 1973-11-23 Four channel stereophonic system

Country Status (4)

Country Link
JP (1) JPS4989502A (en)
DE (1) DE2359254A1 (en)
FR (1) FR2211821B2 (en)
GB (1) GB1391290A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5263379B2 (en) 2011-12-15 2013-08-14 三浦工業株式会社 Drain collection system

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR727097A (en) * 1931-02-05 1932-06-13 Radio Electr Soc Fr Improvements to transmitters emitting modulated waves and receivers
CA984007A (en) * 1971-09-21 1976-02-17 Antal Csicsatka Four channel stereophonic system

Also Published As

Publication number Publication date
FR2211821B2 (en) 1981-08-21
JPS4989502A (en) 1974-08-27
FR2211821A2 (en) 1974-07-19
DE2359254A1 (en) 1974-06-06

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee