EP0323830A3 - Surround-sound system - Google Patents

Surround-sound system Download PDF

Info

Publication number
EP0323830A3
EP0323830A3 EP19890100047 EP89100047A EP0323830A3 EP 0323830 A3 EP0323830 A3 EP 0323830A3 EP 19890100047 EP19890100047 EP 19890100047 EP 89100047 A EP89100047 A EP 89100047A EP 0323830 A3 EP0323830 A3 EP 0323830A3
Authority
EP
European Patent Office
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
EP19890100047
Other languages
German (de)
French (fr)
Other versions
EP0323830B1 (en
EP0323830A2 (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.)
LucasArts Entertainment Co
Original Assignee
LucasArts Entertainment Co
Lucasfilm 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 LucasArts Entertainment Co, Lucasfilm Ltd filed Critical LucasArts Entertainment Co
Publication of EP0323830A2 publication Critical patent/EP0323830A2/en
Publication of EP0323830A3 publication Critical patent/EP0323830A3/en
Application granted granted Critical
Publication of EP0323830B1 publication Critical patent/EP0323830B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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

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.
EP89100047A 1988-01-06 1989-01-03 Surround-sound system Expired - Lifetime EP0323830B1 (en)

Applications Claiming Priority (2)

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

Publications (3)

Publication Number Publication Date
EP0323830A2 EP0323830A2 (en) 1989-07-12
EP0323830A3 true EP0323830A3 (en) 1991-07-24
EP0323830B1 EP0323830B1 (en) 1995-03-29

Family

ID=22496259

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89100047A Expired - Lifetime EP0323830B1 (en) 1988-01-06 1989-01-03 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

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2006583A (en) * 1977-10-14 1979-05-02 Dolby Lab Licensing Corp Multi-channel Sound Systems
EP0249640A1 (en) * 1985-11-22 1987-12-23 Sony Corporation Multi-channel stereo reproducing apparatus

Family Cites Families (6)

* 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
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
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

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2006583A (en) * 1977-10-14 1979-05-02 Dolby Lab Licensing Corp Multi-channel Sound Systems
EP0249640A1 (en) * 1985-11-22 1987-12-23 Sony Corporation Multi-channel stereo reproducing apparatus

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
FUNKSCHAU, vol. 58, no. 17, August 1986, pages 88-92, Munich, DE; "Live-Atmosphäre von der Videokassette" *
JOURNAL OF THE AUDIO ENGINEERING SOCIETY, vol. 23, no. 3, April 1975, pages 178-186, New York, US; R.B. SCHULEIN: "In situ measurement and equalization of sound reproduction systems" *

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
AU2776989A (en) 1989-07-06
KR890012501A (en) 1989-08-26

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