GB927252A - Improvements relating to stereophonic reproducers - Google Patents

Improvements relating to stereophonic reproducers

Info

Publication number
GB927252A
GB927252A GB2141558A GB2141558A GB927252A GB 927252 A GB927252 A GB 927252A GB 2141558 A GB2141558 A GB 2141558A GB 2141558 A GB2141558 A GB 2141558A GB 927252 A GB927252 A GB 927252A
Authority
GB
United Kingdom
Prior art keywords
representing
control signal
outputs
sound
source
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
GB2141558A
Inventor
Eric Wilfred Taylor
David Ernest Kent
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.)
EMI Ltd
Electrical and Musical Industries Ltd
Original Assignee
EMI Ltd
Electrical and Musical Industries Ltd
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 EMI Ltd, Electrical and Musical Industries Ltd filed Critical EMI Ltd
Priority to GB2141558A priority Critical patent/GB927252A/en
Priority to BE580089A priority patent/BE580089A/en
Publication of GB927252A publication Critical patent/GB927252A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04S—STEREOPHONIC SYSTEMS 
    • H04S1/00—Two-channel systems

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Circuit For Audible Band Transducer (AREA)
  • Stereophonic Arrangements (AREA)
  • Magnetic Bearings And Hydrostatic Bearings (AREA)

Abstract

927,252. Stereophonic transmissions. ELECTRIC & MUSICAL INDUSTRIES Ltd. June 12, 1959 [July 4, 1958], No. 21415/58. Class 40 (4). [Also in Group XXXVI] A stereo receiver (Fig. 6) receives an audio signal V A representing sound and a control signal (V<SP>11</SP> L - V<SP>11</SP> R ) / (V<SP>11</SP> L + V R <SP>11</SP> representing the position of the source of the sound where V L <SP>11</SP>V R <SP>11</SP> are signals derived from the outputs of two directional microphones. V A is passed to a tone control circuit 25 and amplifier 27 to one input of a multiplier 29 of the Hall plate type while the control signal is supplied from filter 24 to an F.M. detector 26 through an amplifier to the other input of 29. The product is applied with opposite polarities to 6, 7, V A being additionally supplied to the outputs by multiplier 29 so that two output signals are produced. These outputs are equal (=V A ) when the control signal is zero representing a source of sound placed centrally and one decreases as the other increases, depending on whether the control signal decreases or increases, representing a source displaced from the centre. Specification 871,992 is referred to.
GB2141558A 1958-07-04 1958-07-04 Improvements relating to stereophonic reproducers Expired GB927252A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB2141558A GB927252A (en) 1958-07-04 1958-07-04 Improvements relating to stereophonic reproducers
BE580089A BE580089A (en) 1958-07-04 1959-06-26 Improvements relating to multiplier circuits.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2141558A GB927252A (en) 1958-07-04 1958-07-04 Improvements relating to stereophonic reproducers

Publications (1)

Publication Number Publication Date
GB927252A true GB927252A (en) 1963-05-29

Family

ID=10162556

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2141558A Expired GB927252A (en) 1958-07-04 1958-07-04 Improvements relating to stereophonic reproducers

Country Status (2)

Country Link
BE (1) BE580089A (en)
GB (1) GB927252A (en)

Also Published As

Publication number Publication date
BE580089A (en) 1959-10-16

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