Patent application number | Description | Published |
20110142257 | Reparation of Corrupted Audio Signals - Corrupted portions of an audio signal are detected and repaired. An audio signal may be received from an audio input device. The audio signal may include numerous sequential frames. One or more corrupted frames included in the audio signal may be identified. A frame approximating an uncorrupted frame and corresponding to each corrupted frame may be constructed. Each corrupted frame may be replaced with a corresponding constructed frame to generate a repaired audio signal. The repaired audio signal may be outputted via an audio output device. | 06-16-2011 |
20110182436 | Adaptive Noise Reduction Using Level Cues - An array of microphones utilizes two sets of two microphones for noise suppression. A primary microphone and secondary microphone of the three microphones may be positioned closely spaced to each other to provide acoustic signals used to achieve noise cancellation. A tertiary microphone may be spaced with respect to either the primary microphone or the secondary microphone in a spread-microphone configuration for deriving level cues from audio signals provided by tertiary and the primary or secondary microphone. Signals from two microphones may be used rather than three microphones. The level cues are expressed via an inter-microphone level difference (ILD) which is used to determine one or more cluster tracking control signals. The ILD based cluster tracking signals are used to control the adaptation of null-processing noise cancellation modules. A noise cancelled primary acoustic signal and ILD based cluster tracking control signals are used during post filtering to adaptively generate a mask to be applied against a speech estimate signal. | 07-28-2011 |
20120027218 | Multi-Microphone Robust Noise Suppression - A robust noise reduction system may concurrently reduce noise and echo components in an acoustic signal while limiting the level of speech distortion. The system may receive acoustic signals from two or more microphones in a close-talk, hand-held or other configuration. The received acoustic signals are transformed to cochlea domain sub-band signals and echo and noise components may be subtracted from the sub-band signals. Features in the acoustic sub-band signals are identified and used to generate a multiplicative mask. The multiplicative mask is applied to the noise subtracted sub-band signals and the sub-band signals are reconstructed in the time domain. | 02-02-2012 |
20120116758 | Systems and Methods for Enhancing Voice Quality in Mobile Device - Provided are methods and systems for enhancing the quality of voice communications. The method and corresponding system may involve classifying an audio signal into speech, and speech and noise and creating speech-noise classification data. The method may further involve sharing the speech-noise classification data with a speech encoder via a shared memory or by a Least Significant Bit (LSB) of a Pulse Code Modulation (PCM) stream. The method and corresponding system may also involve sharing acoustic cues with the speech encoder to improve the speech noise classification and, in certain embodiments, sharing scaling transition factors with the speech encoder to enable the speech encoder gradually change data rate in the transitions between the encoding modes. | 05-10-2012 |
20120123775 | Post-noise suppression processing to improve voice quality - Provided are methods and systems for improving quality of speech communications. The method may be for improving quality of speech communications in a system having a speech encoder configured to encode a first audio signal using a first set of encoding parameters associated with a first noise suppressor. A method may involve receiving a second audio signal at a second noise suppressor which provides much higher quality noise suppression than the first noise suppressor. The second audio signal may be generated by a single microphone or a combination of multiple microphones. The second noise suppressor may suppress the noise in the second audio signal to generate a processed signal which may be sent to a speech encoder. A second set of encoding parameters may be provided by the second noise suppressor for use by the speech encoder when encoding the processed signal into corresponding data. | 05-17-2012 |
20130322643 | Multi-Microphone Robust Noise Suppression - A robust noise reduction system may concurrently reduce noise and echo components in an acoustic signal while limiting the level of speech distortion. The system may receive acoustic signals from two or more microphones in a close-talk, hand-held or other configuration. The received acoustic signals are transformed to frequency domain sub-band signals and echo and noise components may be subtracted from the sub-band signals. Features in the acoustic sub-band signals are identified and used to generate a multiplicative mask. The multiplicative mask is applied to the noise subtracted sub-band signals and the sub-band signals are reconstructed in the time domain. | 12-05-2013 |
20140105411 | METHODS AND SYSTEMS FOR KARAOKE ON A MOBILE DEVICE - Systems and methods for providing karaoke recording and playback on mobile devices are provided. The mobile device may play music audio and associated video, and receive via one or more microphones a mix of a user voice, the music, and background noise. The mix is stored both in its original form and as processed to enhance voice and sound through noise suppression and other processing. Stored audio may be uploaded through a communications network to a cloud based computing environment for listening on other mobile devices. Selectable playing control and recording options may be provided. Audio cues may be determined during signal processing of the original acoustic sound and be stored on the mobile device. During playback of recorded audio and, optionally, associated video, the original acoustic sound, recorded cues, and user selectable optional processing may be used to remix during playback, while retaining the original recording. | 04-17-2014 |
20140112496 | MICROPHONE PLACEMENT FOR NOISE CANCELLATION IN VEHICLES - Systems and methods for processing acoustic signals in vehicles are provided. An example system comprises one or more microphones and a voice monitoring device. The voice monitoring device can receive, via the one or more microphones, an acoustic signal and suppress noise in the acoustic signal to obtain a clean speech component. The obtained clean speech component can be provided to one or more vehicle systems. In some embodiments, two microphones selected from the one or more microphones can be positioned on an inner side of a roof of the vehicle, above a windshield, in front of a driver's seat, and directed towards a driver. The two microphones can be equidistant with respect to a symmetry plane of the driver's seat. | 04-24-2014 |
20140114665 | KEYWORD VOICE ACTIVATION IN VEHICLES - Systems and methods for keyword voice activation in vehicles are provided. In one example, a system comprises one or more microphones, a voice monitoring device, and an automatic speech recognition (ASR) system. The voice monitoring device can receive an acoustic signal from the microphones. A noise in the acoustic signal is reduced or suppressed to obtain a clean speech component. The ASR system may detect one or more keywords in the clean speech component and provide a command associated with the one or more keywords to vehicle systems. The system can associated a profile with the one or more keywords. The profile can include parameters specific to one operator or a group of operators. The parameters associated with the operator's profile can be used in the noise suppression, identification of the operator, and/or detecting keywords in the clean speech component. | 04-24-2014 |
20140205107 | ADAPTIVE NOISE REDUCTION USING LEVEL CUES - A system utilizing two pairs of microphones for noise suppression. Primary and secondary microphones may be positioned closely spaced to each other to provide acoustic signals used to achieve noise cancellation/suppression. An additional, tertiary microphone may be spaced with respect to either the primary microphone or the secondary microphone in a spread-microphone configuration for deriving level cues from audio signals provided by the tertiary and the primary or secondary microphone. The level cues are expressed via a level difference used to determine one or more cluster tracking control signal(s). The level difference-based cluster tracking signals are used to control adaptation of noise suppression. A noise cancelled primary acoustic signal and level difference-based cluster tracking control signals are used during post filtering to adaptively generate a mask to be applied to a speech estimate signal. | 07-24-2014 |
20140241702 | DYNAMIC AUDIO PERSPECTIVE CHANGE DURING VIDEO PLAYBACK - Systems and methods for a dynamic audio perspective change during video playback are provided. A pre-recorded video is played with an associated raw audio signal. The audio signal is modified in real time based on an audio processing mode. The audio processing mode can be selected during the video playback via a graphic user interface. By selecting the audio processing mode, a user can attenuate one or more components of the pre-recorded raw audio signal. The components include near source sounds, distant source sounds, and a noise. After the desired audio processing mode is selected the entire audio signal is reprocessed according to the selected mode in a background process and stored in a memory. | 08-28-2014 |