JPS5642495A - Acoustic reproducing device - Google Patents
Acoustic reproducing deviceInfo
- 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
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.
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)
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 |
-
1979
- 1979-08-20 JP JP54106358A patent/JPS5857960B2/en not_active Expired
Cited By (5)
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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