GB2118408A - System for maximum efficiency transfer of modulated signals utilizing line systems - Google Patents

System for maximum efficiency transfer of modulated signals utilizing line systems Download PDF

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Publication number
GB2118408A
GB2118408A GB08310309A GB8310309A GB2118408A GB 2118408 A GB2118408 A GB 2118408A GB 08310309 A GB08310309 A GB 08310309A GB 8310309 A GB8310309 A GB 8310309A GB 2118408 A GB2118408 A GB 2118408A
Authority
GB
United Kingdom
Prior art keywords
signal
primary
selectively
dynamic control
transmission line
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
GB08310309A
Other versions
GB2118408B (en
GB8310309D0 (en
Inventor
Graham Phillip Bloy
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.)
Alfred F Eberhardt
Marvin Coghill
Original Assignee
Alfred F Eberhardt
Marvin Coghill
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 Alfred F Eberhardt, Marvin Coghill filed Critical Alfred F Eberhardt
Publication of GB8310309D0 publication Critical patent/GB8310309D0/en
Publication of GB2118408A publication Critical patent/GB2118408A/en
Application granted granted Critical
Publication of GB2118408B publication Critical patent/GB2118408B/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G7/00—Volume compression or expansion in amplifiers
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G5/00—Tone control or bandwidth control in amplifiers
    • H03G5/02—Manually-operated control
    • H03G5/04—Manually-operated control in untuned amplifiers
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G9/00—Combinations of two or more types of control, e.g. gain control and tone control
    • H03G9/02—Combinations of two or more types of control, e.g. gain control and tone control in untuned amplifiers
    • H03G9/025—Combinations of two or more types of control, e.g. gain control and tone control in untuned amplifiers frequency-dependent volume compression or expansion, e.g. multiple-band systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/62—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission for providing a predistortion of the signal in the transmitter and corresponding correction in the receiver, e.g. for improving the signal/noise ratio
    • H04B1/64—Volume compression or expansion arrangements

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Reduction Or Emphasis Of Bandwidth Of Signals (AREA)

Abstract

A signal transfer and processing system for use with a transmission line. The system includes transmission line interface circuitry (A) and signal processing circuitry (100). The processing circuitry has an input (113) for receiving a signal to be processed, and a signal output (117) for providing a processed signal for further use. An input bandpass filter (119, SW7) filters the signal to be processed to selectively limit bandwidth thereof. A primary active frequency control (123) selectively controls the relative level of the signal provided from said primary bandpass filter means (123) for selectively controlling the relative level of signal dynamics within a plurality of different frequency bands thereby to provide a frequency controlled signal. A primary dynamic control circuit (127) dynamically compresses the frequency controlled signal to provide a primarily compressed signal. A secondary active frequency control (135) selectively controls the relative level of the primarily compressed signal within a plurality of different frequency bands to provide a frequency controlled primarily compressed signal. A secondary dynamic control circuit (137) dynamically compresses the last-said signal, supplying a secondarily compressed signal. A feedback circuit (128, 129, 140) interconnected between the primary and secondary dynamic control circuits limits dynamic compression by the primary dynamic control circuit as a time-delayed function of increase in the level of the secondarily compressed signal. An output bandpass filter (152, SW8) filters the secondarily compressed signal to selectively limit its bandwidth. The interface circuitry includes switching circuits (30) for interconnection of signal input and signal output of the signal processing circuitry with the transmission line.

Description

The application was originally made under the Patent Cooperation Treaty
with the United States of America Patent Office acting as the receiving office on (86) 26August 1981, being given an application number PCT/US1311011147. The application was searched by the United States of America Patent Office acting as the International Search Authority (ISA), and published by the Internationa I B urea u an (87)51 March 1983 under seria I number W083100787 in the E ng fish language. The text of the application is contained in the publication made by the Intemationa I Burea as above identified.
(12)UK Patent Application (19)G13 (11)2 118 408A (54) System for maximum efficiency transfer of modulated signals utilizing line systems (57) A signal transfer and processing system for use with a transmission line. The system includes transmission line interface circuitry (A) and signal processing circuitry (100). The processing circuitry has an input (113) for receiving a signal to be processed, and a signal output (117) for providing a processed signal for further use. An input bandpass filter (119, SW7) filters the signal to be processed to selectively limit bandwidth thereof. A primary active frequency control (123) selectively controls the relative level of the signal provided from said primary bandpass filter means (123) for selectively controlling thejelative level of signal dynamics within a plurality of different frequency bands thereby to provide a frequency controlled signal. A primary dynamic control circuit (127) dynamically corn- (21) Application No 8310309 (22) Date of filing 26 Aug 1981 (43) Date of issue 26 Oct 1983 (51) INT. CL.' as given by ISA H04B 1162 1164 H04M 1100 (52) Domestic classification H4R 22 B PCX (56) Documents cited by]SA US A 4025723 US A 4249042 US A 4061874 US A 3795876 US A 3729693 (58) Field of search by ISA US 17911D,1P,1R,IVIL 3281168,171333114 (71) Applicants Alfred F. Eberhardt, 19-5 Sulkhurnvit (31) Road, GPO Box 2181, Bangkok. Marvin Coghill, Apt 24 Chanint Court, Sol, Ton Son, Ploenchit Road, Bangkok.
(72) Inventors Graham Philip Bloy Agent andlor Address for Service Serjeants, The Crescent, King Street, Leicester.
PATENTS ACT 1977 SPECIFICATION NO 2118408A
The following corrections were allowed under Section 117 on 20 August 1984:
presses the frequency controlled signal to provide a primarily compressed signal. A secondary active frequency control (135) selectively controls the relative level of the primarily compressed signal within a plurality of different frequency bands to provide a frequency controlled primarily compressed signal. A secondary dynamic control circuit (137) dynamically compresses the lastsaid signal, supplying a secondarily compressed signal. Afeedback circuit (128,129,140) interconnected between the primary and secondary dynamic control circuits limits dynamic compression by the primary control circuit as a time-delayed function of increase in the level of the secondarily compressed signal. An output bandpass filter (152, SW8) filters the secondarily compressed signal to selectively limit its bandwidth. The interface circuitry includes switching circuits (30) for interconnection of signal input and signal output of the signal processing circuitry with the transmission line.
00 40 A ri rplAnNE OR OTHER Front page, Heading (71) Applicants below Bangkok (second occurrence) insert 82/3 Soi 40, Sukhumvit Road, Bangkok, Thailand.
THE PATENT OFFICE 19 September 1984 Graham Pffilip Bloy, Bas 258859/6 Sp7C; G) 00 00 >
GB08310309A 1981-08-26 1981-08-26 System for maximum efficiency transfer of modulated signals utilizing line systems Expired GB2118408B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US1981/001147 WO1983000787A1 (en) 1981-08-26 1981-08-26 System for maximum efficiency transfer of modulated signals utilizing line systems

Publications (3)

Publication Number Publication Date
GB8310309D0 GB8310309D0 (en) 1983-05-18
GB2118408A true GB2118408A (en) 1983-10-26
GB2118408B GB2118408B (en) 1985-06-19

Family

ID=22161396

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08310309A Expired GB2118408B (en) 1981-08-26 1981-08-26 System for maximum efficiency transfer of modulated signals utilizing line systems

Country Status (6)

Country Link
EP (1) EP0086777A1 (en)
JP (1) JPS59500297A (en)
AU (1) AU7585581A (en)
DE (1) DE3152946T1 (en)
GB (1) GB2118408B (en)
WO (1) WO1983000787A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU577709B2 (en) * 1985-07-19 1988-09-29 Celcom Cellular Pty. Ltd. Interface for mobile telephone system

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1367002A (en) * 1971-04-06 1974-09-18 Victor Company Of Japan Compression and/or expansion system and circuit
US3729693A (en) * 1971-08-02 1973-04-24 R Dolby Compressor/expander switching methods and apparatus
US3896379A (en) * 1974-06-10 1975-07-22 Gen Electric Intercom circuit for a radio transmitter and receiver
US4038494A (en) * 1975-06-17 1977-07-26 Fmc Corporation Digital serial transmitter/receiver module
US4025723A (en) * 1975-07-07 1977-05-24 Hearing Health Group, Inc. Real time amplitude control of electrical waves
US4061874A (en) * 1976-06-03 1977-12-06 Fricke J P System for reproducing sound information
DE2842945C3 (en) * 1978-10-02 1981-11-19 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Circuit for generating a control signal for controlling the transmission rate of electronically controllable amplifying or attenuating elements
US4249042A (en) * 1979-08-06 1981-02-03 Orban Associates, Inc. Multiband cross-coupled compressor with overshoot protection circuit

Also Published As

Publication number Publication date
AU7585581A (en) 1983-03-08
JPS59500297A (en) 1984-02-23
GB2118408B (en) 1985-06-19
DE3152946T1 (en) 1983-12-01
WO1983000787A1 (en) 1983-03-03
GB8310309D0 (en) 1983-05-18
EP0086777A1 (en) 1983-08-31

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Legal Events

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