CA2270664A1 - Multi-channel audio enhancement system for use in recording and playback and methods for providing same - Google Patents

Multi-channel audio enhancement system for use in recording and playback and methods for providing same

Info

Publication number
CA2270664A1
CA2270664A1 CA002270664A CA2270664A CA2270664A1 CA 2270664 A1 CA2270664 A1 CA 2270664A1 CA 002270664 A CA002270664 A CA 002270664A CA 2270664 A CA2270664 A CA 2270664A CA 2270664 A1 CA2270664 A1 CA 2270664A1
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CA
Canada
Prior art keywords
signals
playback
channel audio
audio
pair
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
CA002270664A
Other languages
French (fr)
Other versions
CA2270664C (en
Inventor
Arnold I. Klayman
Alan D. Kraemer
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.)
DTS LLC
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Individual
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 Individual filed Critical Individual
Publication of CA2270664A1 publication Critical patent/CA2270664A1/en
Application granted granted Critical
Publication of CA2270664C publication Critical patent/CA2270664C/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
    • H04S3/002—Non-adaptive circuits, e.g. manually adjustable or static, for enhancing the sound image or the spatial distribution
    • 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
    • H04S3/008—Systems employing more than two channels, e.g. quadraphonic in which the audio signals are in digital form, i.e. employing more than two discrete digital channels
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04S—STEREOPHONIC SYSTEMS 
    • H04S2400/00—Details of stereophonic systems covered by H04S but not provided for in its groups
    • H04S2400/01—Multi-channel, i.e. more than two input channels, sound reproduction with two speakers wherein the multi-channel information is substantially preserved
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04S—STEREOPHONIC SYSTEMS 
    • H04S2420/00—Techniques used stereophonic systems covered by H04S but not provided for in its groups
    • H04S2420/01—Enhancing the perception of the sound image or of the spatial distribution using head related transfer functions [HRTF's] or equivalents thereof, e.g. interaural time difference [ITD] or interaural level difference [ILD]

Abstract

An audio enhancement system and method (10) for use receives a group of multi-channel audio signals (18) and provides a simulated surround sound environment through playback of only two output signals (26 and 28). The multi-channel audio signals (18) comprise a pair of front signals intended for playback from a forward sound stage and a pair of rear signals intended for playback from a rear sound stage. The front and rear signals are modified in pairs by a multi-channel audio immersion processor (24). The multi-channel audio immersion processor (24) separates an ambient component of each pair of signals from a direct component and processing at least some of the components with a head-related transfer function.
Processing of the individual audio signal components is determined by an intended playback position of the corresponding original audio signals. The individual audio signal components are then selectively combined with the original audio signals to form two enhanced output signals L OUT and R OUT for generating a surround sound experience upon playback.
CA002270664A 1996-11-07 1997-10-31 Multi-channel audio enhancement system for use in recording and playback and methods for providing same Expired - Lifetime CA2270664C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US08/743,776 US5912976A (en) 1996-11-07 1996-11-07 Multi-channel audio enhancement system for use in recording and playback and methods for providing same
US08/743,776 1996-11-07
PCT/US1997/019825 WO1998020709A1 (en) 1996-11-07 1997-10-31 Multi-channel audio enhancement system for use in recording and playback and methods for providing same

Publications (2)

Publication Number Publication Date
CA2270664A1 true CA2270664A1 (en) 1998-05-14
CA2270664C CA2270664C (en) 2006-04-25

Family

ID=24990122

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002270664A Expired - Lifetime CA2270664C (en) 1996-11-07 1997-10-31 Multi-channel audio enhancement system for use in recording and playback and methods for providing same

Country Status (14)

Country Link
US (4) US5912976A (en)
EP (1) EP0965247B1 (en)
JP (1) JP4505058B2 (en)
KR (1) KR100458021B1 (en)
CN (1) CN1171503C (en)
AT (1) ATE222444T1 (en)
AU (1) AU5099298A (en)
CA (1) CA2270664C (en)
DE (1) DE69714782T2 (en)
ES (1) ES2182052T3 (en)
HK (1) HK1011257A1 (en)
ID (1) ID18503A (en)
TW (1) TW396713B (en)
WO (1) WO1998020709A1 (en)

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