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Class Information
Number: 381/103
Name: Electrical audio signal processing systems and devices > Including frequency control > Having automatic equalizer circuit
Description: Subject matter designed to compensate for an undesired amplitude-frequency and/or phrase-frequency characteristic of the system.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7587223 |
Terminal for mobile phone and method for controlling the synchronism of terminal for mobile phone |
Sep. 8, 2009 |
| 7583809 |
Sound signal processing device and sound signal processing method |
Sep. 1, 2009 |
| 7583806 |
Convertible automobile sound system equalizing |
Sep. 1, 2009 |
| 7577263 |
System for audio signal processing |
Aug. 18, 2009 |
| 7564899 |
Multistage tuning-tolerant equalizer filter |
Jul. 21, 2009 |
| 7561619 |
Feedback filter |
Jul. 14, 2009 |
| 7561935 |
Integrated multimedia signal processing system using centralized processing of signals |
Jul. 14, 2009 |
| 7558390 |
Listening device |
Jul. 7, 2009 |
| 7545859 |
Adaptive channel equalization technique and method for wideband passive digital receivers |
Jun. 9, 2009 |
| 7542815 |
Extraction of left/center/right information from two-channel stereo sources |
Jun. 2, 2009 |
| 7529377 |
Loudspeaker with automatic calibration and room equalization |
May. 5, 2009 |
| 7519189 |
Processing of an audio signal for presentation in a high noise environment |
Apr. 14, 2009 |
| 7492817 |
Adaptive digital filter |
Feb. 17, 2009 |
| 7489784 |
Automatic sound field correcting device and computer program therefor |
Feb. 10, 2009 |
| 7483540 |
Automatic audio system equalizing |
Jan. 27, 2009 |
| 7474755 |
Automatic microphone equalization in a directional microphone system with at least three microphones |
Jan. 6, 2009 |
| 7469003 |
Method and apparatus for adaptive channel equalization using decision feedback |
Dec. 23, 2008 |
| 7466829 |
Dynamic bass equalization with modified sallen-key high pass filter |
Dec. 16, 2008 |
| 7466830 |
Equalizing circuit amplifying bass range signal |
Dec. 16, 2008 |
| 7466831 |
Audio processing |
Dec. 16, 2008 |
| 7463746 |
Narrow opening electroacoustical transducing |
Dec. 9, 2008 |
| 7460678 |
Digital audio processor |
Dec. 2, 2008 |
| 7457421 |
Circuit and program for processing multichannel audio signals and apparatus for reproducing same |
Nov. 25, 2008 |
| 7453932 |
Test device and setting method |
Nov. 18, 2008 |
| 7443913 |
High speed decision feedback equalizer |
Oct. 28, 2008 |
| 7428308 |
Transmitting and reproducing stereophonic audio signals |
Sep. 23, 2008 |
| 7409067 |
Method and apparatus for adjusting frequency characteristic of signal |
Aug. 5, 2008 |
| 7409066 |
Method of adjusting filter parameters and an associated playback system |
Aug. 5, 2008 |
| 7403626 |
Level adjustment apparatus |
Jul. 22, 2008 |
| 7390960 |
Electronic signal processor |
Jun. 24, 2008 |
| 7388959 |
Harmonic generator and pre-amp |
Jun. 17, 2008 |
| 7363096 |
Digital audio signal filtering mechanism and method |
Apr. 22, 2008 |
| 7352872 |
Filter circuit and method for processing an audio signal |
Apr. 1, 2008 |
| 7346326 |
Mobile communication terminal with equalizer function |
Mar. 18, 2008 |
| 7340069 |
System and method for split automatic gain control |
Mar. 4, 2008 |
| 7336793 |
Loudspeaker system for virtual sound synthesis |
Feb. 26, 2008 |
| 7333863 |
Recording and playback control system |
Feb. 19, 2008 |
| 7302062 |
Audio enhancement system |
Nov. 27, 2007 |
| 7289637 |
Method for automatically adjusting the filter parameters of a digital equalizer and reproduction device for audio signals for implementing such a method |
Oct. 30, 2007 |
| 7277550 |
Enhancing audio signals by nonlinear spectral operations |
Oct. 2, 2007 |
| 7274795 |
System for and method of audio signal processing for presentation in a high-noise environment |
Sep. 25, 2007 |
| 7266205 |
Linearized filter band equipment and processes |
Sep. 4, 2007 |
| 7254243 |
Processing of an audio signal for presentation in a high noise environment |
Aug. 7, 2007 |
| 7215784 |
Programmable audio system for automotive vehicles |
May. 8, 2007 |
| 7215787 |
Digital audio precompensation |
May. 8, 2007 |
| 7194096 |
Method and apparatus for adaptively pre-shaping audio signal to accommodate loudspeaker characteristics |
Mar. 20, 2007 |
| 7181021 |
Apparatus for acoustically improving an environment |
Feb. 20, 2007 |
| 7177432 |
Sound processing system with degraded signal optimization |
Feb. 13, 2007 |
| 7171005 |
P.A. system installation method |
Jan. 30, 2007 |
| 7171009 |
Method of correcting sound field in an audio system |
Jan. 30, 2007 |
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