AU2776989A - Surround-sound system - Google Patents

Surround-sound system

Info

Publication number
AU2776989A
AU2776989A AU27769/89A AU2776989A AU2776989A AU 2776989 A AU2776989 A AU 2776989A AU 27769/89 A AU27769/89 A AU 27769/89A AU 2776989 A AU2776989 A AU 2776989A AU 2776989 A AU2776989 A AU 2776989A
Authority
AU
Australia
Prior art keywords
surround
sound
channel
loudspeakers
equalization
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
AU27769/89A
Other versions
AU624347B2 (en
Inventor
Tomlinson Holman
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.)
LUCAS ARTS ENTERTAINMENT Co
Original Assignee
LUCAS ARTS ENTERTAINMENT 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
Application filed by LUCAS ARTS ENTERTAINMENT Co filed Critical LUCAS ARTS ENTERTAINMENT Co
Publication of AU2776989A publication Critical patent/AU2776989A/en
Application granted granted Critical
Publication of AU624347B2 publication Critical patent/AU624347B2/en
Anticipated expiration legal-status Critical
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04S—STEREOPHONIC SYSTEMS 
    • H04S3/00—Systems employing more than two channels, e.g. quadraphonic
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04S—STEREOPHONIC SYSTEMS 
    • H04S3/00—Systems employing more than two channels, e.g. quadraphonic
    • H04S3/02—Systems employing more than two channels, e.g. quadraphonic of the matrix type, i.e. in which input signals are combined algebraically, e.g. after having been phase shifted with respect to each other
    • 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 
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04S—STEREOPHONIC SYSTEMS 
    • H04S7/00—Indicating arrangements; Control arrangements, e.g. balance control
    • H04S7/30—Control circuits for electronic adaptation of the sound field
    • H04S7/307—Frequency adjustment, e.g. tone control

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • General Physics & Mathematics (AREA)
  • Mathematical Optimization (AREA)
  • Mathematical Physics (AREA)
  • Pure & Applied Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Mathematical Analysis (AREA)
  • Algebra (AREA)
  • Stereophonic System (AREA)
  • Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)

Abstract

Spectral imbalance (alteration in timbre) when playing home video versions of motion pictures is overcome by re-equalization according to a unique correction response curve which compensates for the equalization for playback in large theater-sized auditoriums inherent in motion picture soundtracks. Surround-sound home playback of motion pictures is enhanced by employing main channel loudspeakers that produce generally direct sound fields and surround channel loudspeakers that produce generally diffuse sound fields. Preferably, further equalization is applied to the reproduced surround channel to compensate for the differences in perceived timbre between direct and diffuse sound fields. In addition, the reproduced surround-sound channel is further enhanced by decreasing the interaural cross-correlation of the surround-sound channel sound field at listening positions within the room, preferably by introducing slight pitch shifting in the signals applied to multiple surround loudspeakers.
AU27769/89A 1988-01-06 1989-01-06 Surround-sound system Expired AU624347B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US14157088A 1988-01-06 1988-01-06
US141570 1988-01-06

Publications (2)

Publication Number Publication Date
AU2776989A true AU2776989A (en) 1989-07-06
AU624347B2 AU624347B2 (en) 1992-06-11

Family

ID=22496259

Family Applications (1)

Application Number Title Priority Date Filing Date
AU27769/89A Expired AU624347B2 (en) 1988-01-06 1989-01-06 Surround-sound system

Country Status (7)

Country Link
EP (1) EP0323830B1 (en)
JP (1) JP2727339B2 (en)
KR (1) KR890012501A (en)
AT (1) ATE120605T1 (en)
AU (1) AU624347B2 (en)
CA (1) CA1310919C (en)
DE (1) DE68921899T2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5043970A (en) * 1988-01-06 1991-08-27 Lucasarts Entertainment Company Sound system with source material and surround timbre response correction, specified front and surround loudspeaker directionality, and multi-loudspeaker surround

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5517393B2 (en) * 1972-07-26 1980-05-10
JPS5333601A (en) * 1976-09-10 1978-03-29 Pioneer Electronic Corp Stereophonic system
GB2006583B (en) * 1977-10-14 1982-04-28 Dolby Lab Licensing Corp Multi-channel sound systems
JPS5773600A (en) * 1980-10-24 1982-05-08 Pioneer Electronic Corp Stereophonic reproducing device
JPH0720309B2 (en) * 1984-12-06 1995-03-06 松下電器産業株式会社 Sound quality adjustment device for speakers
US4799260A (en) * 1985-03-07 1989-01-17 Dolby Laboratories Licensing Corporation Variable matrix decoder
JPS62122500A (en) * 1985-11-22 1987-06-03 Sony Corp Multi-channel stereo reproducing device
DK152478C (en) * 1985-12-06 1988-07-25 Ole Sparkjaer PROCEDURE AND CIRCUIT FOR DECODING FOUR CHANNEL SIGNALS WHICH ARE THE MATRIX CODE AND EXISTING IN THE FORM OF A TWO CHANNEL SIGNAL

Also Published As

Publication number Publication date
DE68921899T2 (en) 1995-09-21
JPH02141100A (en) 1990-05-30
JP2727339B2 (en) 1998-03-11
CA1310919C (en) 1992-12-01
EP0323830B1 (en) 1995-03-29
ATE120605T1 (en) 1995-04-15
EP0323830A2 (en) 1989-07-12
AU624347B2 (en) 1992-06-11
DE68921899D1 (en) 1995-05-04
EP0323830A3 (en) 1991-07-24
KR890012501A (en) 1989-08-26

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