JPS56111400A - Sound field expanding apparatus - Google Patents

Sound field expanding apparatus

Info

Publication number
JPS56111400A
JPS56111400A JP1344180A JP1344180A JPS56111400A JP S56111400 A JPS56111400 A JP S56111400A JP 1344180 A JP1344180 A JP 1344180A JP 1344180 A JP1344180 A JP 1344180A JP S56111400 A JPS56111400 A JP S56111400A
Authority
JP
Japan
Prior art keywords
filter
output
channel
band
signal system
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.)
Pending
Application number
JP1344180A
Other languages
Japanese (ja)
Inventor
Yoshihiro Kitamura
Takashi Hamada
Osamu Yashima
Seiya Nikaido
Katsumi Nakabayashi
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.)
Mitsubishi Electric Corp
Japan Broadcasting Corp
Original Assignee
Mitsubishi Electric Corp
Nippon Hoso Kyokai NHK
Japan Broadcasting Corp
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 Mitsubishi Electric Corp, Nippon Hoso Kyokai NHK, Japan Broadcasting Corp filed Critical Mitsubishi Electric Corp
Priority to JP1344180A priority Critical patent/JPS56111400A/en
Publication of JPS56111400A publication Critical patent/JPS56111400A/en
Pending 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 enable to easily expand a sound field in case the space of speakers is narrow, by providing a specified filter on both the main signal system and the sub- signal system of each channel, respectively, compounding those outputs, and obtaining an output signal of each channel. CONSTITUTION:The stereophonic signals L, R of 2-channels are made to branch to the main signal system M and the sub-signal system S, respectively, the output of the sub-signal system S is compounded with the output of the main signal system M of the other channel, and it is made an output signal to the speaker of each channel. An all band-pass filter 13 whose phase only is varied in accordance with the frequency is provided on the system M, and a low-pass or band-pass filter 14 containing the frequency band of 500-2,000Hz, and an all band-pass filter 13 are provided on the system S. The filter 14 of the system S, among said filters must have an attenuation function for deciding the amplitude ratio of a crosstalk component, and the filter 13 of the system M must have a function for getting rid of the phase difference between the output of said filter 14 and that of the filter 13 of the system M by componsating a variation of phase by the filter 14 of the system S.
JP1344180A 1980-02-06 1980-02-06 Sound field expanding apparatus Pending JPS56111400A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1344180A JPS56111400A (en) 1980-02-06 1980-02-06 Sound field expanding apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1344180A JPS56111400A (en) 1980-02-06 1980-02-06 Sound field expanding apparatus

Publications (1)

Publication Number Publication Date
JPS56111400A true JPS56111400A (en) 1981-09-03

Family

ID=11833211

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1344180A Pending JPS56111400A (en) 1980-02-06 1980-02-06 Sound field expanding apparatus

Country Status (1)

Country Link
JP (1) JPS56111400A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4495637A (en) * 1982-07-23 1985-01-22 Sci-Coustics, Inc. Apparatus and method for enhanced psychoacoustic imagery using asymmetric cross-channel feed
US4567607A (en) * 1983-05-03 1986-01-28 Stereo Concepts, Inc. Stereo image recovery
US5692050A (en) * 1995-06-15 1997-11-25 Binaura Corporation Method and apparatus for spatially enhancing stereo and monophonic signals
US5912975A (en) * 1995-06-30 1999-06-15 Philips Electronics North America Corp Method and circuit for creating phantom sources using phase shifting circuitry

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4495637A (en) * 1982-07-23 1985-01-22 Sci-Coustics, Inc. Apparatus and method for enhanced psychoacoustic imagery using asymmetric cross-channel feed
US4567607A (en) * 1983-05-03 1986-01-28 Stereo Concepts, Inc. Stereo image recovery
US5692050A (en) * 1995-06-15 1997-11-25 Binaura Corporation Method and apparatus for spatially enhancing stereo and monophonic signals
US5912975A (en) * 1995-06-30 1999-06-15 Philips Electronics North America Corp Method and circuit for creating phantom sources using phase shifting circuitry

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