With Amplitude Control Patents (Class 381/102)
  • Patent number: 8903109
    Abstract: A multiband dynamics compressor implements a frequency-domain solution for addressing unwanted magnitude peaks which may occur at the crossover frequency (boundary) between two adjacent frequency bands. The solution proposes making slight adjustments to the frequency band boundary locations, for example on a frame-by-frame basis, in order to prevent a spectral peak in the input signal from being located midway between two frequency bands. The adjustment to the boundary location pushes the energy of the spectral peak substantially into one frequency band for compression.
    Type: Grant
    Filed: June 23, 2010
    Date of Patent: December 2, 2014
    Assignee: STMicroelectronics, Inc.
    Inventor: Earl C. Vickers
  • Patent number: 8903097
    Abstract: An information processing device includes: an output device configured to perform notification to a user by outputting ringing sound; a sound pickup device configured to pick up surrounding sound as ambient sound; an adaptive filtering process device configured to perform an adaptive filtering process using the picked-up ambient sound and the ringing sound output from the output device, to thereby extract, from the ambient sound, estimated environmental sound from which the ringing sound picked up by the sound pickup device has been removed; and a control device configured to control, on the basis of the feature quantity of a predetermined feature extracted from the estimated environmental sound, the adjustment of at least one of the sound volume and the sound quality of the ringing sound.
    Type: Grant
    Filed: February 8, 2011
    Date of Patent: December 2, 2014
    Assignee: Sony Corporation
    Inventor: Chisato Kemmochi
  • Publication number: 20140341394
    Abstract: A loudspeaker system with a transducer and an enclosure with at least one resonant chamber, including a resonant-chamber resonance frequency, at which a displacement characteristic of a vibratile diaphragm of the transducer has a minimum. The loudspeaker system further includes a multi-mode signal processor with a set of signal processes wherein in one example, a variable gain, frequency selective dynamic filter reduces the gain in a high displacement frequency range upon an output in the frequency range exceeding an overload amplitude threshold.
    Type: Application
    Filed: May 13, 2014
    Publication date: November 20, 2014
    Inventor: James J. Croft, III
  • Publication number: 20140334642
    Abstract: A method and apparatus for outputting an audio signal and a method of adjusting the volume of an audio signal are provided. An embodiment of the present invention provides a method for outputting an audio signal that includes: (a) determining an output level of a modulated signal to be outputted for each respective frequency band by using a hearing threshold measured for the respective frequency band; and (b) outputting the modulated signal and an audio signal simultaneously. An embodiment of the present invention can improve hearing ability by outputting an audio signal and a modulated signal together. Also, according to an embodiment of the present invention, a user can use visual signals to personally set the output level of audio signals that is optimal for each frequency band in accordance with changes in the user's dynamic hearing threshold for each respective frequency band, even while listening to audio signals of which the output level for each frequency band was determined previously.
    Type: Application
    Filed: July 3, 2014
    Publication date: November 13, 2014
    Inventor: Sang-Yeop Kwak
  • Patent number: 8885845
    Abstract: Microphones are provided at an air inlet of the engine and a vehicle-cabin-side wall surface of an engine room, and engine sounds are picked up. The engine sound is processed by a signal processing section, and the processed engine sound is output from a speaker provided in a vehicle cabin. The signal processing section is provided with a filter which simulates a sound insulation characteristic of the vehicle cabin and a transformation section for processing the engine sound according to driving condition. A spectrum transformation characteristic of the transformation section is determined according to values detected by a vehicle speed sensor, an engine speed sensor, and an accelerator depression sensor, and a spectrum of the engine sound is transformed by means of specification of the spectrum transformation characteristic, thereby enhancing an engine sound.
    Type: Grant
    Filed: February 16, 2012
    Date of Patent: November 11, 2014
    Assignee: Yamaha Corporation
    Inventors: Yoshikazu Honji, Yasuo Yoshioka, Tetsu Kobayashi
  • Patent number: 8880205
    Abstract: Integrated processing of multimedia signals can eliminate unnecessary signal processors and converters without losing the functionality of typical home entertainment system components. The integrated multimedia system includes a main player that captures and processes signals digitally. The main player may adjust the audio signal to provide audio output of equal loudness across all frequencies by accounting for sensitivity of the human ear for sounds of varying frequencies. The main player can also account for perceived differences in loudness based on the angle of a listener to a speaker by detecting the position of a user and making an adjustment accordingly. The invention further provides a speaker that has embedded performance characteristics or an identifier that allows the system to provide an optimal speaker driving current for a particular system or determine how that speaker would be best implemented in the integrated system.
    Type: Grant
    Filed: August 16, 2005
    Date of Patent: November 4, 2014
    Assignee: Mondo Systems, Inc.
    Inventor: Chul Chung
  • Patent number: 8873763
    Abstract: This invention discloses a method and a plurality of compressive amplitude distortion units for enhancing the perceptibility of the low-frequency portion of a sound by introducing residue harmonics of low-frequency signal components into the sound, where the residue harmonics are generated by a nonlinear function emulating the middle-ear response of a human being. The low-frequency portion in the resultant sound is perceivable to a human listener even if this portion is removed from this sound.
    Type: Grant
    Filed: June 29, 2011
    Date of Patent: October 28, 2014
    Inventor: Wing Hon Tsang
  • Patent number: 8873772
    Abstract: The present invention relates to a process for adjusting the sound volume of a digital sound recording characterized in that it comprises: a step consisting of determining, in absolute values, for a recording, the maximum amplitude values for sound frequencies audible for the human ear, a step consisting of calculating the possible gain for a specified sound level setting, between the maximum amplitude value determined above and the maximum amplitude value for all frequencies combined, a step consisting of reproducing the recording with a sound card by automatically adjusting the amplification gain level making it possible to obtain a sound level for the recording of a specified value so that it corresponds to the gain calculated for this recording.
    Type: Grant
    Filed: March 19, 2012
    Date of Patent: October 28, 2014
    Assignee: TouchTunes Music Corporation
    Inventors: Guy Nathan, Dominique Dion
  • Patent number: 8848943
    Abstract: A signal processing device for supplying sound signals to a first speaker for emitting a sound on a low-pitched sound side and a second speaker for emitting a sound on a high-pitched sound side higher than the low-pitched sound side, includes a control portion that controls a characteristic of the sound signal supplied to the first speaker so that an output level of the first speaker is maintained at a crossover frequency between the first speaker and the second speaker, when an output level of the sound signal supplied to the first speaker is changed.
    Type: Grant
    Filed: September 1, 2009
    Date of Patent: September 30, 2014
    Assignee: Yamaha Corporation
    Inventor: Masaki Katayama
  • Patent number: 8804976
    Abstract: A content reproduction device including: a microphone that collects noise in the surroundings of a casing; a feature amount extractor that extracts a plurality of feature amounts; a distance calculator that calculates an intervector distance between the extracted feature amount vector and a feature amount vector with the same dimensions which is set in advance as a feature amount of a waveform of a music signal; a determinator that determines whether or not music is included in the sounds collected by the microphone; a processor that processes the signal of the sounds collected by the microphone to change the volume or frequency characteristics of the sounds collected by the microphone; and an adder that adds and outputs the signal of the sounds collected by the microphone and the signal of sounds of reproduced content.
    Type: Grant
    Filed: December 14, 2011
    Date of Patent: August 12, 2014
    Assignee: Sony Corporation
    Inventors: Emiru Tsunoo, Kyosuke Matsumoto, Akira Inoue
  • Patent number: 8804975
    Abstract: Devices and methods for digital sound leveling are disclosed. The subject devices and methods can be used to reduce the risk of noise induced hearing loss. According to an embodiment, an audio file can be parsed into frames that are filtered using an A-weighted digital filter and scaled to a desired power level. Accordingly, the dynamic range of an audio output at a particular volume level can be controlled.
    Type: Grant
    Filed: February 12, 2010
    Date of Patent: August 12, 2014
    Assignee: University of Florida Research Foundation, Incorporated
    Inventors: John G. Harris, Colleen Garbe Le Prell, Qing Yang
  • Patent number: 8798279
    Abstract: A degree of seal of an ear about a speaker port may be estimated by detecting touch contact between the ear and at least one touch sensor in fixed relation to the speaker port. The degree of seal is estimated based on the detected touch contact. Based upon the estimated degree of seal, the acoustic output of the speaker may be adjusted. The adjustment may compensate for perceived changes to the quality of the acoustic output resulting from the degree of seal. The at least one touch sensor may be a plurality of touch sensors spaced around the speaker port. Each sensor may have a truncated wedge shape, with a narrow end closest to the speaker port. Upon receipt of user input indicative of a high degree of ear seal, a sample of the sensor(s) may be taken and stored for using during future estimation of the degree of seal.
    Type: Grant
    Filed: February 14, 2012
    Date of Patent: August 5, 2014
    Assignee: Blackberry Limited
    Inventor: Craig Eric Ranta
  • Patent number: 8779962
    Abstract: This document discusses, among other things, apparatus and methods including an analog-to-digital controller (ADC) configured to receive an enable signal and to provide an ADC output signal to control logic, wherein the control logic is configured to provide a control voltage to a control input of a switch. In an example, the control voltage includes the ADC output signal when the ADC output signal is below a first threshold or above a second threshold. In certain examples, the control logic is configured to transition the control voltage from the first threshold to the second threshold when the ADC output signal is between the first and second thresholds.
    Type: Grant
    Filed: April 10, 2013
    Date of Patent: July 15, 2014
    Assignee: Fairchild Semiconductor Corporation
    Inventors: John L. Carpentier, Julie Lynn Stultz, Steven Macaluso
  • Patent number: 8774425
    Abstract: A method and an apparatus for controlling gain in a multi-audio channel system as well as a voice processing system are disclosed. The method includes: judging whether signals on any audio channels are similar or correlated; sorting audio channels of similar or correlated signals into one group if the similar or correlated signals exist on the audio channels, and using the same Automatic Gain Control (AGC) unit to process signals of this group of audio channels; and using different AGC units to process other non-similar or non-correlated signals on audio channels. The gain control apparatus includes: a judging unit, a grouping unit, a control processing unit, and at least two AGC units. Therefore, in a multi-audio channel communication, the perception of the sound locations of similar or correlated audio channels is not damaged, and the non-similar or non-correlated audio channels doe not interfere with each other.
    Type: Grant
    Filed: July 5, 2011
    Date of Patent: July 8, 2014
    Assignee: Huawei Device Co., Ltd.
    Inventors: Shuian Yu, Cong Geng
  • Patent number: 8774426
    Abstract: In a signal processing apparatus, a high frequency level detecting unit detects a level of a high frequency component adjusted with a first adjusting unit, and a first control unit controls a first gain of the adjusting unit according to the level of the high frequency component thus detected. Further, a low frequency level detecting unit detects a level of a low frequency component adjusted with a second adjusting unit. A second control unit controls a second gain according to the level of the high frequency component and the level of the low frequency component thus adjusted, so that a difference between the level of the high frequency component adjusted with the first adjusting unit and the level of the low frequency component adjusted with the second adjusting unit becomes smaller than a specific level determined in advance.
    Type: Grant
    Filed: June 29, 2011
    Date of Patent: July 8, 2014
    Assignee: Lapis Semiconductor Co., Ltd.
    Inventors: Masanori Inazumi, Naotaka Saito
  • Patent number: 8761406
    Abstract: An audio signal processing device includes: a microphone configured to collect noise; an analyzing unit configured to analyze an audio signal collected by the microphone to detect the level and frequency property of the collected audio signal; and a signal processing unit configured to subject an audio signal to be reproduced to signal processing based on the analysis results of the analyzing unit.
    Type: Grant
    Filed: June 16, 2009
    Date of Patent: June 24, 2014
    Assignee: Sony Corporation
    Inventors: Kazunobu Ohkuri, Kohei Asada, Shiro Suzuki, Tetsunori Itabashi, Hiroki Kawanishi
  • Patent number: 8755538
    Abstract: Disclosed is a tuning sound (TS) feedback apparatus. The tuning sound (TS) feedback apparatus includes: a TS pick-up casing which is disposed and fixed inside or near the hearing organ of a sound engineer who manages tuning operations for sound output from a sound output terminal of a sound device having an equalizer; a sound/electric conversion element which is included in the TS pick-up casing, picks up the TS output from the sound output terminal of the sound device, and converts the picked-up TS into an electrical signal; and a TS output module which is included in the TS pick-up casing, converts the TS converted into the electrical signal by the sound/electric conversion element into wired or wireless communication data to be used for external communication, and transmits the data to the sound device.
    Type: Grant
    Filed: September 18, 2008
    Date of Patent: June 17, 2014
    Inventor: Dae Hoon Kwon
  • Publication number: 20140161283
    Abstract: An audio signal is conveyed more efficiently by transmitting or recording a baseband of the signal with an estimated spectral envelope and a noise-blending parameter derived from a measure of the signal's noise-like quality. The signal is reconstructed by translating spectral components of the baseband signal to frequencies outside the baseband, adjusting phase of the regenerated components to maintain phase coherency, adjusting spectral shape according to the estimated spectral envelope, and adding noise according to the noise-blending parameter. Preferably, the transmitted or recorded signal also includes an estimated temporal envelope that is used to adjust the temporal shape of the reconstructed signal.
    Type: Application
    Filed: May 31, 2013
    Publication date: June 12, 2014
    Inventors: Michael Mead Truman, Mark Stuart Vinton
  • Patent number: 8750538
    Abstract: A frequency band of an audio input signal is analyzed to determine if a transient is present. When transients are detected, modifications are made to the intensity levels corresponding to the frequency band for a brief time period.
    Type: Grant
    Filed: May 4, 2007
    Date of Patent: June 10, 2014
    Assignee: Creative Technology Ltd
    Inventors: Carlos Avendano, Jean Laroche, Michael M. Goodwin
  • Patent number: 8731215
    Abstract: Scaling, by a desired amount sm, the overall perceived loudness Lm of a multichannel audio signal, wherein perceived loudness is a nonlinear function of signal power P, by scaling the perceived loudness of each individual channel Lc by an amount substantially equal to the desired amount of scaling of the overall perceived loudness of all channels sm subject to accuracy in calculations and the desired accuracy of the overall perceived loudness scaling sm. The perceived loudness of each individual channel may be scaled by changing the gain of each individual channel, wherein gain is a scaling of a channel's power. Optionally, in addition, the loudness scaling applied to each channel may be modified so as to reduce the difference between the actual overall loudness scaling and the desired amount of overall loudness scaling.
    Type: Grant
    Filed: December 27, 2011
    Date of Patent: May 20, 2014
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Alan Jeffrey Seefeldt, Michael John Smithers
  • Publication number: 20140112483
    Abstract: An automatic gain control derives the gain from the distance between the sound source and the microphone. The distance-based automatic gain control normalizes signal level changes caused by a speaker not maintaining a constant distance with respect to the microphone. Also, a proximity-effect compensation that derives the adaptive filter from the distance between the sound source and the microphone. The proximity-effect compensation corrects frequency response changes due to undesired proximity-effect variations. Determination of the distance between a sound source and a microphone permits accurate compensation for both frequency response changes and distance-related signal level changes.
    Type: Application
    Filed: October 24, 2012
    Publication date: April 24, 2014
    Applicant: ALCATEL-LUCENT USA INC.
    Inventor: Walter Etter
  • Patent number: 8666093
    Abstract: An audio input signal is processed to produce a processed audio output signal. An audio input signal is received as an original signal. The audio input signal is dynamically filtered to produce a first stage signal consisting of a selected frequency band of the input signal. Gain applied to the first stage signal is dynamically controlled in response to a control signal to produce a second stage signal. The control signal is derived from the first stage signal. Processing the original signal in combination with the second stage signal to produce a processed audio output signal. Processing the original signal in combination with the second stage signal and the first stage signal to produce a processed audio output signal.
    Type: Grant
    Filed: December 7, 2011
    Date of Patent: March 4, 2014
    Assignee: Red Lion 49 Limited
    Inventors: Christopher Sefton Jenkins, Mark Nicholas Stow
  • Publication number: 20140050334
    Abstract: A method or apparatus for delivering audio programming such as music to listeners may include identifying, capturing and applying a listener's audio perception characteristics (sometimes referred to as the listener's Personal Waveform Profile) to transform audio content so that the listener perceives the content similarly to how the content would be perceived by a different listener. An audio testing tool may be implemented as software application to identify and capture respective listeners' Personal Waveform Profiles. A signal processor may operate an algorithm processing source audio content using the respective listeners' Personal Waveform Profiles to provide audio output based on a difference between different profiles.
    Type: Application
    Filed: August 15, 2012
    Publication date: February 20, 2014
    Applicant: Warner Bros. Entertainment Inc.
    Inventors: Darcy Antonellis, Lewis Ostrover
  • Publication number: 20140044282
    Abstract: An instrument amplification system provides improved low frequency enhancement. A powered subwoofer system enhances the low frequency components of a standard instrument amplifier by incorporating a speaker level high-pass filter crossover network 5 prior to connection to a standard instrument speaker. The speaker level instrument amplifier output is also attenuated, low-pass filtered and re-amplified to drive a dedicated low frequency subwoofer speaker. In one embodiment, a single speaker cabinet connects via a single speaker cable and includes both typical instrument speakers and an active powered subwoofer system. In another embodiment, a stand alone active powered 10 subwoofer connects to a standard instrument amplifier and includes a speaker level high-pass crossover output for connection to a standard instrument speaker cabinet. The instrument amplifier speaker output is attenuated, low-pass filtered, re-amplified and connected to a low frequency subwoofer speaker.
    Type: Application
    Filed: October 21, 2013
    Publication date: February 13, 2014
    Inventors: James K. Waller, JR., Jon J. Waller
  • Publication number: 20140044270
    Abstract: System, method, and computer program product to provide targeted and variable information during a remote conference, by: responsive to a first person joining the remote conference, playing a first tone having a first acoustical characteristic indicating an arrival of the first person, responsive to a second person joining the remote conference, playing a second tone having a second acoustical characteristic indicating an arrival of the second person, the second acoustical characteristic different than the first, and responsive to one of the first person and the second person leaving the remote conference, playing a third tone having a third acoustical characteristic indicating a departure of one of the first person and the second person, the third acoustical characteristic different than the second, a type of the first, second, and third acoustical characteristics being the same, the first, second, and third tone audible to at least one person on the remote conference.
    Type: Application
    Filed: August 10, 2012
    Publication date: February 13, 2014
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Thomas E. Creamer, Kevin G. Paterson, Theodore J. L. Shrader, Nagarjuna R. Vemireddy
  • Patent number: 8638954
    Abstract: An audio signal processing apparatus includes: a first filtering unit which outputs an audio signal while attenuating frequency components except for preset frequency components; a detecting unit which detects a sound volume level; an amplitude limiting unit which calculates an amplitude limiting level corresponding to the sound volume level, and which limits a part of a waveform of the audio signal output from the first filtering unit; a second filtering unit which outputs the audio signal output from the amplitude limiting unit while attenuating frequency components except for preset frequency components including a part of the frequency band of the audio signal output from the first filtering unit, and a part of the frequency band of the harmonics; a compressing unit which compresses a dynamic range of the audio signal; and an adding unit which adds the audio signal output from the compressing unit to the input audio signal.
    Type: Grant
    Filed: February 25, 2010
    Date of Patent: January 28, 2014
    Assignee: Yamaha Corporation
    Inventor: Ryotaro Aoki
  • Patent number: 8626322
    Abstract: A computer-implemented method and system are provided for profiling or analyzing audio data based on an audio parameter. The audio data is divided into audio data into segments. Each segment is characterized by the audio parameter in a defined range. Effects are selected according to the segments meeting criteria for the audio parameter of the effects. A media presentation is authored or generated using the selected effects.
    Type: Grant
    Filed: July 2, 2009
    Date of Patent: January 7, 2014
    Assignee: Apple Inc.
    Inventors: Ralf Weber, Guillaume Vergnaud
  • Patent number: 8618403
    Abstract: When a signal representing a first set value or more is received from a detecting section, a determination is made whether a boost value is a predetermined value or more. When the boost value is the predetermined value or more, a currently set boost value is reduced by a predetermined step, so that a new boost value is set. Further, when the boost value is less than the predetermined value, a currently set volume level is reduced by a predetermined step, and a new volume level is set. Therefore, in a case when the set boost value is gradually reduced and the boost value is finally less than the predetermined value, the audio signal is still the first set value or more, the volume level is further reduced by each predetermined step. Therefore, an audio signal can be securely prevented from being clipped.
    Type: Grant
    Filed: December 5, 2011
    Date of Patent: December 31, 2013
    Assignee: Onkyo Corporation
    Inventors: Yoshio Misu, Hiroyuki Fukuma
  • Patent number: 8619998
    Abstract: The present invention describes techniques that can be used to provide novel methods of spatial audio rendering using adapted M-S matrix shuffler topologies. Such techniques include headphone and loudspeaker-based binaural signal simulation and rendering, stereo expansion, multichannel upmix and pseudo multichannel surround rendering.
    Type: Grant
    Filed: August 7, 2007
    Date of Patent: December 31, 2013
    Assignee: Creative Technology Ltd
    Inventors: Martin Walsh, Jean Marc Jot, Edward Stein
  • Patent number: 8600074
    Abstract: Scaling, by a desired amount sm, the overall perceived loudness Lm of a multichannel audio signal, wherein perceived loudness is a nonlinear function of signal power P, by scaling the perceived loudness of each individual channel Lc by an amount substantially equal to the desired amount of scaling of the overall perceived loudness of all channels sm, subject to accuracy in calculations and the desired accuracy of the overall perceived loudness scaling sm. The perceived loudness of each individual channel may be scaled by changing the gain of each individual channel, wherein gain is a scaling of a channel's power. Optionally, in addition, the loudness scaling applied to each channel may be modified so as to reduce the difference between the actual overall loudness scaling and the desired amount of overall loudness scaling.
    Type: Grant
    Filed: August 22, 2011
    Date of Patent: December 3, 2013
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Alan Seefeldt, Michael Smithers
  • Patent number: 8594345
    Abstract: Systems and method for adapting a gain of an audio signal containing at least two different tracks with different signal level ranges. An example system includes a loudness determination unit for determining a perceived loudness of the audio input signal based on a psychoacoustic model of a human hearing. The system further includes a loudness adaptation unit configured to determine a loudness adaptation indicator based on the perceived loudness and a predetermined loudness, and to introduce the loudness adaptation indicator into the audio signal to generate an adapted gain signal. A gain determination unit is configured to adapt the gain for outputting the audio signal containing the at least two tracks based on the loudness adaptation indicators in the adapted gain signal at about the predetermined loudness.
    Type: Grant
    Filed: March 11, 2011
    Date of Patent: November 26, 2013
    Assignee: Harman Becker Automotive Systems GmbH
    Inventor: Wolfgang Hess
  • Patent number: 8588433
    Abstract: There is disclosed a microphone, a circuit, and a method. A microphone capsule may include an electret microphone and a field effect transistor (FET). A floating DC voltage source may have a first end connected to a drain terminal of the electret microphone capsule and a second end. A load resistor may be connected between the second end of the floating DC voltage source and a source terminal of the electret microphone capsule. A voltage follower may have an output connected to the source terminal of the electret microphone capsule and the first end of the floating DC voltage source. A coupling capacitor may couple an audio signal from the source terminal of the electret microphone capsule to an input of the voltage follower.
    Type: Grant
    Filed: March 17, 2010
    Date of Patent: November 19, 2013
    Assignee: Baltic Latvian Universal Electronics, LLC
    Inventors: Martins Saulespurens, Felikss Stanevics
  • Patent number: 8588430
    Abstract: It is described a method for controlling an adaptation of a behavior of an audio device (100) to a current acoustic environmental condition. The method comprises (a) monitoring an audio output signal (x(t), x?(t)) being provided to an acoustic output device (110) of the audio device (100) for outputting an acoustic output signal, (b) measuring an audio input signal (z(t)) being provided by an acoustic input device (120) of the audio device (100), wherein the audio input signal (z(t)) is indicative for a feedback portion of the acoustic output signal and for the current acoustic environmental condition, (c) determining a relation between the audio output signal (x?(t)) and the audio input signal (z(t)) and (d) adapting the behavior of the audio device (100) based on the determined relation.
    Type: Grant
    Filed: February 9, 2010
    Date of Patent: November 19, 2013
    Assignee: NXP B.V.
    Inventors: Wouter Joos Tirry, Peterjan Schreurs, Ralf Funken
  • Patent number: 8582784
    Abstract: A method and device for enhancing low frequency content of an input signal (X), e.g. bass boosting of an audio signal. An overdriving (ODR) of a low frequency signal part (LS1) of the input signal (X) is performed to produce a boosted low frequency signal (LS3), wherein the overdriving (ODR) includes amplifying the low frequency signal part (LS1) by a first gain (G1) to form an amplified low frequency signal (LS2), and hard-clipping (CLP) the amplified low frequency signal (LS2) to form the boosted low frequency signal (LS3). A first low-pass filtering (LPF1) is then performed, resulting in a processed low frequency signal (LS4). A cut-off frequency of the first low-pass filtering (LPF1) is selected so as to reduce distortion components introduced by the overdriving (ODR). Finally, the processed low frequency signal (LS4) is combined with at least part of the input signal (X) to form an output signal (Y).
    Type: Grant
    Filed: August 20, 2008
    Date of Patent: November 12, 2013
    Assignee: AM3D A/S
    Inventor: Paulus Jacobus Minnaar
  • Patent number: 8571236
    Abstract: A volume control system comprises: an amplifying apparatus; and a controller connectable to the amplifying apparatus. The amplifying apparatus includes; a first receiving section for receiving a volume value from the controller, a first input section into which an instruction for changing the volume value is input by a user's operation, a first transmitting section for transmitting the volume value input into the first input section to the controller, and a volume control section for, when the first receiving section receives the volume value or the changed volume value is input into the first input section, controlling a volume value of the amplifying apparatus based on the volume value.
    Type: Grant
    Filed: August 24, 2010
    Date of Patent: October 29, 2013
    Assignee: Onkyo Corporation
    Inventors: Takashi Yamada, Kazushige Otsu
  • Patent number: 8553906
    Abstract: There is provided an apparatus for enabling karaoke. The apparatus includes a casing for the apparatus; a microphone array incorporated within the casing, the microphone array being concealed from a user by the casing; a controller coupled to the microphone array to at least process audio signals from the user input at the microphone array; a data storage device coupled to the controller, the data storage device being for storing pre-recorded songs used for karaoke, and for storing songs as sung by the user; and an image capturing device coupled to the controller, the image capturing device being for capturing images of the user while the user is singing, with the captured images of the user being stored on the data storage device.
    Type: Grant
    Filed: February 2, 2010
    Date of Patent: October 8, 2013
    Assignee: Creative Technology Ltd
    Inventors: Wong Hoo Sim, Yew Teng Too, Tieh Cheng Goh
  • Patent number: 8548614
    Abstract: This invention describes a method for adjusting the loudness and the spectral content of digital audio signals in a real-time using warped spectral filtering. A warped processing module modifies a spectral content of a digital audio signal with a set of gains for a plurality of non-linearly-scaled frequency bands determined by a warping factor ? of a warped delay line. Warped delay line signals, generated by the warped delay line, are processed by a warped filter block containing multiple warped finite impulse response filters, e.g., Mth band filters, using individual warped spectral filtering in said plurality of the non-linearly-scaled frequency bands, which is followed by a conventional processing by a dynamic range control/equalization block. The present invention describes another innovation, that is embedding the warped processing module in a two-channel quadrature mirror filter (QMF) bank for improving processing efficiency at high sample rates.
    Type: Grant
    Filed: June 25, 2009
    Date of Patent: October 1, 2013
    Assignee: Nokia Corporation
    Inventors: Ole Kirkeby, Jarmo Hiipakka
  • Patent number: 8538041
    Abstract: An audio-video (AV) reproduction apparatus capable of analyzing the spectrum of the audio component of an input or reproduced AV signal. The audio component is fed into an unused electronic graphic equalizer (106), the audio frequency bands corresponding to the frequency bands of the electronic graphic equalizer (106) are sampled one frequency band at a time, to obtain the peak level input of each frequency band. The collected peak level input for each frequency band is used to render graphics in the form of equal number segmented spiking bars, where the length of each segmented bar is rendered according to the peak level input of each frequency band. While the rendering is ongoing, another set of peak level input is collected to render the next set of segmented bars. The continuous process of collecting the peak level input and rendering the segmented bars creates a dynamic spectrum analyzer. The spectrum display is superimposed as a graphic over the video signal being reproduced by the apparatus.
    Type: Grant
    Filed: August 15, 2008
    Date of Patent: September 17, 2013
    Assignee: Sony EMCS (Malaysia) Sdn. Bhd.
    Inventors: Hironori Tagawa, Chee Hun Tang
  • Patent number: 8526638
    Abstract: A gain control circuit includes a comparator that compares an input gain value with a count value to generate a comparison result signal, a counter that counts up or counts down the count value in accordance with the comparison result signal, and a gain modulator circuit that modulates the count value to generate a gain control signal which changes in a time-divided manner. The gain modulator circuit modulates the count value so that a gain obtained by time-averaging a gain corresponding to the gain control signal matches a gain based on the count value.
    Type: Grant
    Filed: January 25, 2010
    Date of Patent: September 3, 2013
    Assignee: Fujitsu Semiconductor Limited
    Inventor: Toshiya Kamibayashi
  • Patent number: 8520863
    Abstract: An image display apparatus includes: an image information input section; an image display section for displaying an image corresponding to the image information; a first sound input section adapted to input a first sound signal; a first sound amplification section adapted to amplify the first sound signal to generate a first amplified sound signal; a second sound input section adapted to input a second sound signal; a second sound amplification section adapted to amplify the second sound signal to generate a second amplified sound signal; a sound mixing section adapted to mix the first amplified sound signal and the second amplified sound signal with each other; an audio output section adapted to output an audio corresponding to a sound signal input from the sound mixing section; and an operation mode setting section adapted to set an operation mode, wherein the sound mixing section mixes the first amplified sound signal and the second amplified sound signal based on the operation mode set by the operation mo
    Type: Grant
    Filed: September 2, 2009
    Date of Patent: August 27, 2013
    Assignee: Seiko Epson Corporation
    Inventors: Hirokazu Kamatori, Satoru Nasukawa
  • Patent number: 8515085
    Abstract: A signal processing apparatus is configured to change volume level or frequency characteristics of an input signal with a limited bandwidth in a first frequency range. The apparatus includes: an information extracting unit configured to extract second frequency characteristic information from a collection signal with a limited bandwidth in a second frequency range different from the first frequency range; a frequency characteristic information extending unit configured to estimate first frequency characteristic information from the second frequency characteristic information extracted by the information extracting unit, the first frequency characteristic information including the first frequency range; and a signal correcting unit configured to change volume level or frequency characteristics of the input signal according to the first frequency characteristic information obtained by the frequency characteristic information extending unit.
    Type: Grant
    Filed: September 15, 2009
    Date of Patent: August 20, 2013
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Takashi Sudo, Masataka Osada
  • Patent number: 8515257
    Abstract: A method of automatic announcer voice removal from a televised sporting event. A sound processing circuit divides an audio input signal of a televised sporting event into multiple audio segments. The audio input signal includes crowd noise and announcer commentary. If an audio segment does not exceed a pre-defined amplitude threshold, a voice removal utility adds the audio segment to a recent crowd noise library and stores the segment in an output buffer. If the amplitude of a segment exceeds the threshold, the utility adds the segment to a recent announcer voice library. The sound processing circuit generates an attenuated version of the segment and blends the attenuated version with one or more mixed segments from the recent crowd noise library. The voice removal utility stores the attenuated and blended segment in the output buffer and outputs one or more audio segments from the buffer in a chronological order.
    Type: Grant
    Filed: October 17, 2007
    Date of Patent: August 20, 2013
    Assignee: International Business Machines Corporation
    Inventor: Nathan J. Harrington
  • Patent number: 8515093
    Abstract: A system includes a plurality of inputs each configured to receive a filtered version of a source signal. The system extracts the energy information from each input signal and compares the energy information of a plurality of input signals. Alternatively, the system extracts energy information from a signal that is the difference of two input signals. Based on the energy information, the system determines at least one parameter that may be changed in at least one circuit in a plurality of circuits to minimize the differences in energy of the input signals or to minimize the energy of the difference signal. Parameters may include for example amplification, delay, and corner frequency values. The set of circuits may include microphone interface circuits. Merely by way of example, a system with microphone interface circuits may be included in a hearing enhancement device or in a hands-free earpiece.
    Type: Grant
    Filed: October 7, 2010
    Date of Patent: August 20, 2013
    Assignee: National Acquisition Sub, Inc.
    Inventors: Sanjay M. Bhandari, Paul D. Smith, Jiang (Jennifer) Yu, Sheng-Yu Peng, Priscilla E. Escobar-Bowser
  • Patent number: 8509456
    Abstract: A circuit configured to adjust the level of an audio signal includes filters each of which is configured to receive an audio signal, and to pass a band set for the filter. Variable gain amplifiers are severally provided to the respective filters, and each variable gain amplifier amplifies the output signal of the corresponding filter. An adder sums the input audio signal and the output signals of the variable gain amplifiers. A control unit controls the level of the output signal of each of the variable gain amplifiers, and controls the gain of each variable gain amplifier according to the level thus monitored.
    Type: Grant
    Filed: September 9, 2010
    Date of Patent: August 13, 2013
    Assignee: Rohm Co., Ltd.
    Inventor: Moto Yamada
  • Patent number: 8502821
    Abstract: The system for three-dimensional rendering of signals has a computer system having acquired, streaming, or previously stored data in its memory representing multiple channels of signals in which each channel has a value which varies over a domain, e.g., time or frequency, and a display coupled to the computer. For each channel, the computer system segments the data of the channel into segments, orders the segments, renders on the display each of the segments, in which each of the rendered segments are aligned in such order along a three-dimensional perspective with gaps between adjacently rendered segments, and lines are rendered extending from each line of each one of the rendered segments to form a three-dimensional plane in the gap to the next successive one of the rendered ordered segments to form a three-dimensional continuous or discontinuous surface characterizing the channel.
    Type: Grant
    Filed: February 4, 2008
    Date of Patent: August 6, 2013
    Assignee: C Speed, LLC
    Inventors: Justin Ralph Louise, Kevin Roy Francis, David James Yaw
  • Patent number: 8498430
    Abstract: Systems and method for adapting a gain of an audio signal containing at least two different tracks with different signal level ranges. An example system includes a loudness determination unit for determining a perceived loudness of the audio input signal based on a psychoacoustic model of a human hearing. The system further includes a loudness adaptation unit configured to determine a loudness adaptation indicator based on the perceived loudness and a predetermined loudness, and to introduce the loudness adaptation indicator into the audio signal to generate an adapted gain signal. A gain determination unit is configured to adapt the gain for outputting the audio signal containing the at least two tracks based on the loudness adaptation indicators in the adapted gain signal at about the predetermined loudness.
    Type: Grant
    Filed: March 11, 2011
    Date of Patent: July 30, 2013
    Assignee: Harman Becker Automotive Systems GmbH
    Inventors: Wolfgang Hess, Frank Bähren
  • Patent number: 8488801
    Abstract: An audio compensation unit includes a detection subunit and a compensation subunit. The detection subunit is for detecting an audio signal to obtain an original frequency. The detection subunit defines a predetermined low frequency band and a predetermined high frequency band. The detection subunit is also for generating a first control signal when the original frequency is within the low frequency band, and a second control signal when the original frequency is within the high frequency band. The compensation subunit includes an electronic switch, a first compensation circuit, and a second compensation circuit. The electronic switch enables the first compensation circuit according to the first control signal, for compensating the audio signal. The electronic switch is further enables the second compensation circuit according to the second control signal, for compensating the audio signal.
    Type: Grant
    Filed: March 31, 2010
    Date of Patent: July 16, 2013
    Assignees: Hong Fu Jin Precision Industry (ShenZhen) Co., Ltd., Hon Hai Precision Industry Co., Ltd.
    Inventor: Shi-Quan Lin
  • Patent number: 8483408
    Abstract: A mobile communication device and a method of setting tone color, which allow a user to set the tone color of received sound. Provided are a normal mode, which sets the equalizer using GCF standards stored in an internal memory or equalizer setting values selected by a provider, a country-specific mode, which uses country-specific setting, and a user mode, in which a user can set frequency-specific gains of the received sound, and one mode is selected from the provided mode, so that the tone color of the received sound can be adjusted according to the selection. Telephone speech quality can be optimized for user preference, network environments and language characteristics.
    Type: Grant
    Filed: September 16, 2008
    Date of Patent: July 9, 2013
    Assignee: Samsung Electronics Co,. Ltd.
    Inventor: Tae-Jin Kang
  • Patent number: 8428270
    Abstract: In one disclosed aspect, dynamic gain modifications are applied to an audio signal at least partly in response to auditory events. In another aspect, an input channel is divided into auditory events by detecting changes in a measurable characteristic of the input signal with respect to time.
    Type: Grant
    Filed: May 4, 2012
    Date of Patent: April 23, 2013
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Brett Graham Crockett, Alan Jeffrey Seefeldt
  • Patent number: 8416958
    Abstract: A signal processing apparatus is configured to change volume level or frequency characteristics of an input signal with a limited bandwidth in a first frequency range. The apparatus includes: an information extracting unit configured to extract second frequency characteristic information from a collection signal with a limited bandwidth in a second frequency range different from the first frequency range; a frequency characteristic information extending unit configured to estimate first frequency characteristic information from the second frequency characteristic information extracted by the information extracting unit, the first frequency characteristic information including the first frequency range; and a signal correcting unit configured to change volume level or frequency characteristics of the input signal according to the first frequency characteristic information obtained by the frequency characteristic information extending unit.
    Type: Grant
    Filed: September 15, 2009
    Date of Patent: April 9, 2013
    Assignee: Kabushika Kaisha Toshiba
    Inventors: Takashi Sudo, Masataka Osada