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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:

Class Number Class Name Patents
381/28 Amplifier 141
381/2 Broadcast or multiplex stereo 308
381/27 Center channel 156
381/23.1 Hearing aid 145
381/17 Pseudo stereophonic 792
381/19 Quadrasonic 202
381/26 Stereo sound pickup device (microphone) 161
381/300 Stereo speaker arrangement 299


Patents under this class:
1 2 3 4 5 6 7 8 9 10 11 12

Patent Number Title Of Patent Date Issued
8027494 Acoustic image creation system and program therefor Sep. 27, 2011
8023659 Mixing system, method and program Sep. 20, 2011
8024187 Pulse allocating method in voice coding Sep. 20, 2011
8019093 Stream segregation for stereo signals Sep. 13, 2011
8009834 Sound reproduction apparatus and method of enhancing low frequency component Aug. 30, 2011
7986801 Device having a point and a spatial sound generating-means for providing stereo sound sensation over a large area Jul. 26, 2011
7983429 Speaker system utilizing input from a transducer in proximity to a separate speaker Jul. 19, 2011
7983922 Apparatus and method for generating multi-channel synthesizer control signal and apparatus and method for multi-channel synthesizing Jul. 19, 2011
7978860 Playback apparatus and playback method Jul. 12, 2011
7974417 Multi-channel bass management Jul. 5, 2011
7974424 Speaker array system Jul. 5, 2011
7974418 Virtualizer with cross-talk cancellation and reverb Jul. 5, 2011
7970144 Extracting and modifying a panned source for enhancement and upmix of audio signals Jun. 28, 2011
7965978 Transmitting/receiving method, transmitter/receiver, and recording medium therefor Jun. 21, 2011
7961888 Method and system for enhancing bass effect in audio signals Jun. 14, 2011
7957545 Stereo speaker system having acoustic filter for improving low frequency characteristic Jun. 7, 2011
7945054 Method and apparatus to reproduce wide mono sound May. 17, 2011
7936886 Speaker system to control directivity of a speaker unit using a plurality of microphones and a method thereof May. 3, 2011
7929709 Sound image localization apparatus Apr. 19, 2011
7925030 Crosstalk cancellation using load impedence measurements Apr. 12, 2011
7920710 Loudspeaker apparatus Apr. 5, 2011
7920707 Audio system Apr. 5, 2011
7907736 Acoustic correction apparatus Mar. 15, 2011
7894609 Stereo signal processing apparatus Feb. 22, 2011
7889870 Method and apparatus to simulate 2-channel virtualized sound for multi-channel sound Feb. 15, 2011
7889871 Apparatus for multichannel sound reproduction system Feb. 15, 2011
7881817 Method and apparatus for processing an audio signal Feb. 1, 2011
7862418 Voucher gaming systems and methods Jan. 4, 2011
7856106 System and method for determining a representation of an acoustic field Dec. 21, 2010
7853021 Decoding apparatus and decoding method for multiple audio standards Dec. 14, 2010
7840014 Sound apparatus with howling prevention function Nov. 23, 2010
7835535 Virtualizer with cross-talk cancellation and reverb Nov. 16, 2010
7826626 Cross-over frequency selection and optimization of response around cross-over Nov. 2, 2010
7817812 Compact audio reproduction system with large perceived acoustic size and image Oct. 19, 2010
7813513 Multi-channel encoder Oct. 12, 2010
7801312 Audio signal processing circuit Sep. 21, 2010
7801317 Apparatus and method of reproducing wide stereo sound Sep. 21, 2010
7796764 Method and device for reproducing a binaural output signal generated from a monaural input signal Sep. 14, 2010
7792674 System and method for providing virtual spatial sound with an audio visual player Sep. 7, 2010
7783064 Hearing aid system Aug. 24, 2010
7778427 Phase compensation techniques to adjust for speaker deficiencies Aug. 17, 2010
7764805 Apparatus for generating surround signal from two-channel stereo signal Jul. 27, 2010
7702111 Audio stereo processing method, device and system Apr. 20, 2010
7676043 Audio bandwidth expansion Mar. 9, 2010
7664272 Sound image control device and design tool therefor Feb. 16, 2010
7664271 Method and apparatus for processing sound signal Feb. 16, 2010
7664270 3D audio signal processing system using rigid sphere and method thereof Feb. 16, 2010
7650000 Audio device and playback program for the same Jan. 19, 2010
7636443 Audio enhancement system Dec. 22, 2009
7634093 Head related transfer functions for panned stereo audio content Dec. 15, 2009

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