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Class Information
Number: 381/1
Name: Electrical audio signal processing systems and devices > Binaural and stereophonic
Description: Subject matter where there are two or more independent sound signals which are to be separately reproduced so as to create a sense of depth.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 6044307 |
Method of entering audio signal, method of transmitting audio signal, audio signal transmitting apparatus, and audio signal receiving and reproducing apparatus |
Mar. 28, 2000 |
| 6038323 |
Stereophonic image enhancement system for use in automobiles |
Mar. 14, 2000 |
| 6035045 |
Sound image localization method and apparatus, delay amount control apparatus, and sound image control apparatus with using delay amount control apparatus |
Mar. 7, 2000 |
| 6026168 |
Methods and apparatus for automatically synchronizing and regulating volume in audio component systems |
Feb. 15, 2000 |
| 6009178 |
Method and apparatus for crosstalk cancellation |
Dec. 28, 1999 |
| 6005947 |
Technique for enhancing stereo sound |
Dec. 21, 1999 |
| 6002774 |
Arrangement, a system, a circuit and a method for enhancing a stereo image |
Dec. 14, 1999 |
| 6002775 |
Method and apparatus for electronically embedding directional cues in two channels of sound |
Dec. 14, 1999 |
| 5995631 |
Sound image localization apparatus, stereophonic sound image enhancement apparatus, and sound image control system |
Nov. 30, 1999 |
| 5991385 |
Enhanced audio teleconferencing with sound field effect |
Nov. 23, 1999 |
| 5987141 |
Stereo expander |
Nov. 16, 1999 |
| 5983087 |
Distributed digital signal processing for vehicle audio systems |
Nov. 9, 1999 |
| 5974152 |
Sound image localization control device |
Oct. 26, 1999 |
| 5974153 |
Method and system for sound expansion |
Oct. 26, 1999 |
| 5970152 |
Audio enhancement system for use in a surround sound environment |
Oct. 19, 1999 |
| 5946400 |
Three-dimensional sound processing system |
Aug. 31, 1999 |
| 5943427 |
Method and apparatus for three dimensional audio spatialization |
Aug. 24, 1999 |
| 5937071 |
Sound field expanding apparatus with improved tone control system |
Aug. 10, 1999 |
| 5930733 |
Stereophonic image enhancement devices and methods using lookup tables |
Jul. 27, 1999 |
| 5917916 |
Audio reproduction systems |
Jun. 29, 1999 |
| 5912975 |
Method and circuit for creating phantom sources using phase shifting circuitry |
Jun. 15, 1999 |
| 5912976 |
Multi-channel audio enhancement system for use in recording and playback and methods for providing same |
Jun. 15, 1999 |
| 5910990 |
Apparatus and method for automatic equalization of personal multi-channel audio system |
Jun. 8, 1999 |
| 5896456 |
Automatic stereophonic manipulation system and apparatus for image enhancement |
Apr. 20, 1999 |
| 5892830 |
Stereo enhancement system |
Apr. 6, 1999 |
| 5892831 |
Method and circuit for creating an expanded stereo image using phase shifting circuitry |
Apr. 6, 1999 |
| 5890125 |
Method and apparatus for encoding and decoding multiple audio channels at low bit rates using adaptive selection of encoding method |
Mar. 30, 1999 |
| 5889867 |
Stereophonic Reformatter |
Mar. 30, 1999 |
| 5889843 |
Methods and systems for creating a spatial auditory environment in an audio conference system |
Mar. 30, 1999 |
| 5883962 |
Method and apparatus for spatially enhancing stereo and monophonic signals |
Mar. 16, 1999 |
| 5883961 |
Sound system |
Mar. 16, 1999 |
| 5878145 |
Electronic circuit and process for creation of three-dimensional audio effects and corresponding sound recording |
Mar. 2, 1999 |
| 5872851 |
Dynamic stereophonic enchancement signal processing system |
Feb. 16, 1999 |
| 5850455 |
Discrete dynamic positioning of audio signals in a 360.degree. environment |
Dec. 15, 1998 |
| 5850453 |
Acoustic correction apparatus |
Dec. 15, 1998 |
| 5850454 |
Method and apparatus for spatially enhancing stereo and monophonic signals |
Dec. 15, 1998 |
| 5844993 |
Surround signal processing apparatus |
Dec. 1, 1998 |
| 5838800 |
Apparatus for enhancing stereo effect with central sound image maintenance circuit |
Nov. 17, 1998 |
| 5835895 |
Infinite impulse response filter for 3D sound with tap delay line initialization |
Nov. 10, 1998 |
| 5822437 |
Signal modification circuit |
Oct. 13, 1998 |
| 5822438 |
Sound-image position control apparatus |
Oct. 13, 1998 |
| 5818418 |
Audio equipment and method of displaying operation thereof |
Oct. 6, 1998 |
| 5815578 |
Method and apparatus for canceling leakage from a speaker |
Sep. 29, 1998 |
| 5812672 |
Method for reducing data in the transmission and/or storage of digital signals of several dependent channels |
Sep. 22, 1998 |
| 5812677 |
Acoustic signal processing method and apparatus |
Sep. 22, 1998 |
| 5799094 |
Surround signal processing apparatus and video and audio signal reproducing apparatus |
Aug. 25, 1998 |
| 5796845 |
Sound field and sound image control apparatus and method |
Aug. 18, 1998 |
| 5768394 |
Surround audio signal reproducing apparatus having a sub-woofer signal mixing function |
Jun. 16, 1998 |
| 5764775 |
Audio processing unit for mixing L channel and R channel of CD/CD-1 audio signal |
Jun. 9, 1998 |
| 5761315 |
Surround signal processing apparatus |
Jun. 2, 1998 |
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