GB1441150A - Tone signal detection methods and apparatus - Google Patents

Tone signal detection methods and apparatus

Info

Publication number
GB1441150A
GB1441150A GB5054773A GB5054773A GB1441150A GB 1441150 A GB1441150 A GB 1441150A GB 5054773 A GB5054773 A GB 5054773A GB 5054773 A GB5054773 A GB 5054773A GB 1441150 A GB1441150 A GB 1441150A
Authority
GB
United Kingdom
Prior art keywords
signal detection
detection methods
tone signal
tone
methods
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
GB5054773A
Other languages
English (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.)
Lanier Electronic Laboratories Inc
Original Assignee
Lanier Electronic Laboratories Inc
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 Lanier Electronic Laboratories Inc filed Critical Lanier Electronic Laboratories Inc
Publication of GB1441150A publication Critical patent/GB1441150A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
    • G11B27/10—Indexing; Addressing; Timing or synchronising; Measuring tape travel
    • G11B27/19—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier
    • G11B27/28—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording
    • G11B27/32—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording on separate auxiliary tracks of the same or an auxiliary record carrier
GB5054773A 1972-11-15 1973-10-31 Tone signal detection methods and apparatus Expired GB1441150A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US306544A US3882545A (en) 1972-11-15 1972-11-15 Apparatus and method for detecting tone signals occuring within a predetermined frequency range

Publications (1)

Publication Number Publication Date
GB1441150A true GB1441150A (en) 1976-06-30

Family

ID=23185769

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5054773A Expired GB1441150A (en) 1972-11-15 1973-10-31 Tone signal detection methods and apparatus

Country Status (4)

Country Link
US (1) US3882545A (ja)
JP (1) JPS5416844B2 (ja)
CA (1) CA1030258A (ja)
GB (1) GB1441150A (ja)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4024414A (en) * 1973-10-31 1977-05-17 Bertram Frederick McCarthy Electrical circuit means for detecting the frequency of input signals
GB1457294A (en) * 1974-01-05 1976-12-01 Ferranti Ltd Pulse-frequency sensitive switching circuit arrangements felx
JPS51101715A (ja) * 1975-03-06 1976-09-08 Nippon Kokan Kk Renzokushodonnyorukoirunagatehokono zaishitsukinitsuseinisugureta aruminiumukirudoreienkohannoseizohoho
US4015082A (en) * 1975-03-13 1977-03-29 Westinghouse Electric Corporation Multi-channel signal decoder
US4179714A (en) * 1975-09-30 1979-12-18 Olympus Optical Company, Ltd. Method of recording an index signal in dictating tape recorder
US4167004A (en) * 1978-03-30 1979-09-04 Bethlehem Steel Corporation Apparatus for detecting plural repetitive signals
US4399527A (en) * 1979-04-09 1983-08-16 Lanier Business Products, Inc. Dictation display device
US4352173A (en) * 1979-04-09 1982-09-28 Lanier Business Products, Inc. Dictation display device
US4301330A (en) * 1979-09-28 1981-11-17 Zenith Radio Corporation Loudspeaker protection circuit
US4348669A (en) * 1980-05-05 1982-09-07 Braun Dudley E Load energizing and de-energizing control system and method
US4357549A (en) * 1980-12-02 1982-11-02 U.S. Government As Represented By The Director Of National Security Agency Automatic frequency alteration circuit
US4818989A (en) * 1984-03-27 1989-04-04 Rockwell International Corporation Selective calling decoder
US4893202A (en) * 1988-03-16 1990-01-09 Lectrolarm Custom Systems, Inc. Video tape recorder control system
AT393569B (de) * 1988-10-13 1991-11-11 Philips Nv System zum aufzeichnen und auswerten von markiersignalen
JP6654155B2 (ja) 2017-01-10 2020-02-26 Kddi株式会社 光伝送システム、ｐｏｎシステムおよび伝送方法
KR102562540B1 (ko) * 2022-11-07 2023-08-02 주식회사 이시엘 활성탄 재생 방법

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3509549A (en) * 1965-09-03 1970-04-28 Victor Company Of Japan Magnetic recording and reproducing of cue signals,including pulse width discrimination for cue signal selection
US3581217A (en) * 1968-11-05 1971-05-25 Wayne R Isaacs Frequency to direct current converter circuit
US3678221A (en) * 1969-09-11 1972-07-18 Minnesota Mining & Mfg Detection of recorded control signals upon reproduction from recording medium

Also Published As

Publication number Publication date
JPS5416844B2 (ja) 1979-06-26
US3882545A (en) 1975-05-06
JPS50811A (ja) 1975-01-07
CA1030258A (en) 1978-04-25

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee