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GB942459A - Improvements relating to apparatus for deriving pseudostereophonic signals - Google Patents

Improvements relating to apparatus for deriving pseudostereophonic signals

Info

Publication number
GB942459A
GB942459A GB755060A GB755060A GB942459A GB 942459 A GB942459 A GB 942459A GB 755060 A GB755060 A GB 755060A GB 755060 A GB755060 A GB 755060A GB 942459 A GB942459 A GB 942459A
Authority
GB
United Kingdom
Prior art keywords
amplitude
source
signals
difference
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.)
Expired
Application number
GB755060A
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.)
PATHE MARCONI IND MUSIC
Original Assignee
PATHE MARCONI IND MUSIC
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 PATHE MARCONI IND MUSIC filed Critical PATHE MARCONI IND MUSIC
Publication of GB942459A publication Critical patent/GB942459A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04S—STEREOPHONIC SYSTEMS 
    • H04S5/00—Pseudo-stereo systems, e.g. in which additional channel signals are derived from monophonic signals by means of phase shifting, time delay or reverberation 
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L7/00—Rotary or oscillatory slide valve-gear or valve arrangements
    • F01L7/12—Rotary or oscillatory slide valve-gear or valve arrangements specially for two-stroke engines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
    • F02D9/02—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits concerning induction conduits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B75/00—Other engines
    • F02B75/02—Engines characterised by their cycles, e.g. six-stroke
    • F02B2075/022—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle
    • F02B2075/025—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle two
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
    • F02D9/02—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits concerning induction conduits
    • F02D2009/0201—Arrangements; Control features; Details thereof
    • F02D2009/0206—Arrangements; Control features; Details thereof specially positioned with relation to engine or engine housing

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Circuit For Audible Band Transducer (AREA)
  • Stereophonic System (AREA)

Abstract

942,459. Binaural systems. INDUSTRIES MUSICALES ET ELECTRIQUES PATHE MARCONI. March 3, 1960 [March 3, 1959], No. 7550/60. Heading H4R. In apparatus for obtaining pseudostereophonic output signals from an audio-frequency signal of the monaural type provided by a source 2, Fig. 1, a converter 1 derives from a signal obtained from the source 2 two further electrical signals which differ in amplitude and feeds them by channels 3, 4 to an arrangement 5 for deriving a difference signal proportional to the difference in amplitude between the two further signals, or between two modified signals respectively derived from the further signals, and this difference signal is applied to a network 7 which derives the two pseudo-stereophonic output signals, one of which is proportional to the sum of the amplitude of a signal obtained from the source and the amplitude of the difference signal and the other of which is proportional to the difference between the amplitude of said latter signal obtained from the source and the amplitude of the difference signal. The converter 1 may comprise filters F1 to F5, Fig. 2, respectively connected in series with phase-shift elements H1 to H5 and potentiometers K1 to K5 and L1 to L5. Filters F1 and F5 are high and low pass devices respectively and filters F2, F3 and F4 are of the band-pass type. All the potentiometers K are connected to a phase-adjusting element N1 and all the potentiometers L are connected to a phase-adjusting element N2. Transformers P1 and P2 constitute the arrangement 5 and their primary windings are respectively connected in series additive and subtractive arrangement. Transformer P1 is terminated by a load resistor 65 whilst transformer P2 feeds a primary winding of each of transformers Q1 and Q2 (network 7), the other primary windings of which are supplied from the source 2 through a potentiometer 9. The secondary windings of transformers Q1 and Q2 respectively provide signals proportional to the sum and difference between the amplitude of the signal from the source 2 and the output of the secondary winding of transformer P2. In a modification, Fig. 3 (not shown), each channel 3, 4 includes an echo chamber fed by a loud-speaker and housing a microphone. The pseudo-stereophonic output signals may be recorded on tape or disc or may be applied to spaced loud-speakers.
GB755060A 1959-03-03 1960-03-03 Improvements relating to apparatus for deriving pseudostereophonic signals Expired GB942459A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR788183A FR1228158A (en) 1959-03-03 1959-03-03 Centrifugal speed limiter for two-stroke engines

Publications (1)

Publication Number Publication Date
GB942459A true GB942459A (en) 1963-11-20

Family

ID=8711944

Family Applications (1)

Application Number Title Priority Date Filing Date
GB755060A Expired GB942459A (en) 1959-03-03 1960-03-03 Improvements relating to apparatus for deriving pseudostereophonic signals

Country Status (2)

Country Link
FR (1) FR1228158A (en)
GB (1) GB942459A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5046097A (en) * 1988-09-02 1991-09-03 Qsound Ltd. Sound imaging process
WO1991020167A1 (en) * 1990-06-15 1991-12-26 Northwestern University Method and apparatus for creating de-correlated audio output signals and audio recordings made thereby
US5095507A (en) * 1990-07-24 1992-03-10 Lowe Danny D Method and apparatus for generating incoherent multiples of a monaural input signal for sound image placement
US5105462A (en) * 1989-08-28 1992-04-14 Qsound Ltd. Sound imaging method and apparatus
US5233665A (en) * 1991-12-17 1993-08-03 Gary L. Vaughn Phonetic equalizer system
US5418856A (en) * 1992-12-22 1995-05-23 Kabushiki Kaisha Kawai Gakki Seisakusho Stereo signal generator

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1248365B (en) * 1961-11-13 1967-08-24 Peugeot Cycles Control of the crankcase pump of two-stroke internal combustion engines

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5046097A (en) * 1988-09-02 1991-09-03 Qsound Ltd. Sound imaging process
US5105462A (en) * 1989-08-28 1992-04-14 Qsound Ltd. Sound imaging method and apparatus
WO1991020167A1 (en) * 1990-06-15 1991-12-26 Northwestern University Method and apparatus for creating de-correlated audio output signals and audio recordings made thereby
US5235646A (en) * 1990-06-15 1993-08-10 Wilde Martin D Method and apparatus for creating de-correlated audio output signals and audio recordings made thereby
US5095507A (en) * 1990-07-24 1992-03-10 Lowe Danny D Method and apparatus for generating incoherent multiples of a monaural input signal for sound image placement
US5233665A (en) * 1991-12-17 1993-08-03 Gary L. Vaughn Phonetic equalizer system
US5418856A (en) * 1992-12-22 1995-05-23 Kabushiki Kaisha Kawai Gakki Seisakusho Stereo signal generator

Also Published As

Publication number Publication date
FR1228158A (en) 1960-08-26

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