EP0412725A3 - Sound reproduction apparatus - Google Patents

Sound reproduction apparatus Download PDF

Info

Publication number
EP0412725A3
EP0412725A3 EP19900308534 EP90308534A EP0412725A3 EP 0412725 A3 EP0412725 A3 EP 0412725A3 EP 19900308534 EP19900308534 EP 19900308534 EP 90308534 A EP90308534 A EP 90308534A EP 0412725 A3 EP0412725 A3 EP 0412725A3
Authority
EP
European Patent Office
Prior art keywords
reproduction apparatus
sound reproduction
sound
reproduction
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.)
Withdrawn
Application number
EP19900308534
Other versions
EP0412725A2 (en
Inventor
Seiichi Ishikawa
Ryoh Tagami
Tomio Shiota
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Publication of EP0412725A2 publication Critical patent/EP0412725A2/en
Publication of EP0412725A3 publication Critical patent/EP0412725A3/en
Withdrawn legal-status Critical Current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 
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04S—STEREOPHONIC SYSTEMS 
    • H04S1/00—Two-channel systems
    • 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
EP19900308534 1989-08-05 1990-08-02 Sound reproduction apparatus Withdrawn EP0412725A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP20337489 1989-08-05
JP203374/89 1989-08-05

Publications (2)

Publication Number Publication Date
EP0412725A2 EP0412725A2 (en) 1991-02-13
EP0412725A3 true EP0412725A3 (en) 1991-10-09

Family

ID=16472975

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19900308534 Withdrawn EP0412725A3 (en) 1989-08-05 1990-08-02 Sound reproduction apparatus

Country Status (2)

Country Link
EP (1) EP0412725A3 (en)
JP (1) JPH03163999A (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5617478A (en) * 1994-04-11 1997-04-01 Matsushita Electric Industrial Co., Ltd. Sound reproduction system and a sound reproduction method
DE4442147C2 (en) * 1994-11-26 2002-02-14 Harman Becker Automotive Sys Mobile radio receiver
DE69635466T2 (en) * 1995-01-25 2006-08-17 Victor Company of Japan, Ltd., Yokohama Raumklangbzw. Surround signal processing apparatus
US5692050A (en) * 1995-06-15 1997-11-25 Binaura Corporation Method and apparatus for spatially enhancing stereo and monophonic signals
US5892831A (en) * 1995-06-30 1999-04-06 Philips Electronics North America Corp. Method and circuit for creating an expanded stereo image using phase shifting circuitry
US5974153A (en) * 1997-05-19 1999-10-26 Qsound Labs, Inc. Method and system for sound expansion
US6373954B1 (en) * 1997-10-14 2002-04-16 Cirrus Logic, Inc. Single-chip audio circuitry, method, and systems using the same

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4151369A (en) * 1976-11-25 1979-04-24 National Research Development Corporation Sound reproduction systems
GB2074823A (en) * 1980-03-12 1981-11-04 Cohen J M Stereophonic audio reproduction system
US4394536A (en) * 1980-06-12 1983-07-19 Mitsubishi Denki Kabushiki Kaisha Sound reproduction device
EP0142213A1 (en) * 1983-11-17 1985-05-22 Koninklijke Philips Electronics N.V. Apparatus for generating a pseudo-stereo signal
GB2180727A (en) * 1985-09-12 1987-04-01 Sgs Microelettronica Spa Non-recursive system for expanding the stereo base of stereophonic acoustic diffusion apparatus
US4841573A (en) * 1987-08-31 1989-06-20 Yamaha Corporation Stereophonic signal processing circuit

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS619100A (en) * 1984-06-25 1986-01-16 Hitachi Ltd Monaural recorded orchestral accompaniment play
JPS63292800A (en) * 1987-05-25 1988-11-30 Nippon Columbia Co Ltd Sound image enlarging and forming device
JPH01220600A (en) * 1988-02-27 1989-09-04 Fujitsu Ten Ltd System for constituting acoustic field in car room

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4151369A (en) * 1976-11-25 1979-04-24 National Research Development Corporation Sound reproduction systems
GB2074823A (en) * 1980-03-12 1981-11-04 Cohen J M Stereophonic audio reproduction system
US4394536A (en) * 1980-06-12 1983-07-19 Mitsubishi Denki Kabushiki Kaisha Sound reproduction device
EP0142213A1 (en) * 1983-11-17 1985-05-22 Koninklijke Philips Electronics N.V. Apparatus for generating a pseudo-stereo signal
GB2180727A (en) * 1985-09-12 1987-04-01 Sgs Microelettronica Spa Non-recursive system for expanding the stereo base of stereophonic acoustic diffusion apparatus
US4841573A (en) * 1987-08-31 1989-06-20 Yamaha Corporation Stereophonic signal processing circuit

Also Published As

Publication number Publication date
JPH03163999A (en) 1991-07-15
EP0412725A2 (en) 1991-02-13

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