JPS5642495A - Acoustic reproducing device - Google Patents

Acoustic reproducing device

Info

Publication number
JPS5642495A
JPS5642495A JP10635879A JP10635879A JPS5642495A JP S5642495 A JPS5642495 A JP S5642495A JP 10635879 A JP10635879 A JP 10635879A JP 10635879 A JP10635879 A JP 10635879A JP S5642495 A JPS5642495 A JP S5642495A
Authority
JP
Japan
Prior art keywords
directivity
left channels
sound
creating circuit
judging circuits
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
JP10635879A
Other languages
Japanese (ja)
Other versions
JPS5857960B2 (en
Inventor
Yoshinobu Kikuchi
Akiyoshi Yamada
Yoichi Kimura
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
Priority to JP54106358A priority Critical patent/JPS5857960B2/en
Publication of JPS5642495A publication Critical patent/JPS5642495A/en
Publication of JPS5857960B2 publication Critical patent/JPS5857960B2/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04S—STEREOPHONIC SYSTEMS 
    • H04S1/00—Two-channel systems

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Stereophonic System (AREA)

Abstract

PURPOSE:To obtain the clearness and presence of sound image localization and also to prevent sound-quality deterioration due to sound-image expansion by dividing the subtraction signal of the outputs of directivity judgingcircuits for right and left channels into two by a both-ear difference creating circuit and then by adding them to right and left channels out of phase. CONSTITUTION:Directivity judging circuits F are connected to right and left channels RIN and LIN respectively and the subtraction signal of the outputs of those directivity judging circuits F is divided by both-ear difference creating circuit G into two, which are applied to the right and left channels being out of phase. Directivity judging circuits F and both-ear difference creating circuit G are given transfer characteristics fixed by expressions 15 and 16, so that even when a sound image is expanded, the same acoustic reproducing effect can be realized. In expressions 15 and 16, A and B are transfer functions between loudspeakers SP1 and SP2, and between ears 23 and 24, and C and D are those between immaginary loudspeaker SP3 and the ears.
JP54106358A 1979-08-20 1979-08-20 sound reproduction device Expired JPS5857960B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP54106358A JPS5857960B2 (en) 1979-08-20 1979-08-20 sound reproduction device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP54106358A JPS5857960B2 (en) 1979-08-20 1979-08-20 sound reproduction device

Publications (2)

Publication Number Publication Date
JPS5642495A true JPS5642495A (en) 1981-04-20
JPS5857960B2 JPS5857960B2 (en) 1983-12-22

Family

ID=14431521

Family Applications (1)

Application Number Title Priority Date Filing Date
JP54106358A Expired JPS5857960B2 (en) 1979-08-20 1979-08-20 sound reproduction device

Country Status (1)

Country Link
JP (1) JPS5857960B2 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61178242A (en) * 1985-02-04 1986-08-09 Koito Mfg Co Ltd Head lamp device for vehicle
JPH01175500A (en) * 1987-12-29 1989-07-11 Matsushita Electric Ind Co Ltd Image expanding circuit
US6198826B1 (en) 1997-05-19 2001-03-06 Qsound Labs, Inc. Qsound surround synthesis from stereo
US6236730B1 (en) 1997-05-19 2001-05-22 Qsound Labs, Inc. Full sound enhancement using multi-input sound signals
US7003119B1 (en) 1997-05-19 2006-02-21 Qsound Labs, Inc. Matrix surround decoder/virtualizer

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61178242A (en) * 1985-02-04 1986-08-09 Koito Mfg Co Ltd Head lamp device for vehicle
JPH01175500A (en) * 1987-12-29 1989-07-11 Matsushita Electric Ind Co Ltd Image expanding circuit
US6198826B1 (en) 1997-05-19 2001-03-06 Qsound Labs, Inc. Qsound surround synthesis from stereo
US6236730B1 (en) 1997-05-19 2001-05-22 Qsound Labs, Inc. Full sound enhancement using multi-input sound signals
US7003119B1 (en) 1997-05-19 2006-02-21 Qsound Labs, Inc. Matrix surround decoder/virtualizer

Also Published As

Publication number Publication date
JPS5857960B2 (en) 1983-12-22

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