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| Number | Title | Issue Date |
| 8175871 | Apparatus and method of noise and echo reduction in multiple microphone audio systems Multiple microphone noise suppression apparatus and methods are described herein. The apparatus and methods implement a variety of noise suppression techniques and apparatus that can be selectively applied to signals received using multiple microphones. The micropho... | 05/08/2012 |
| 8175872 | Geotagged and weighted environmental audio for enhanced speech recognition accuracy Enhancing noisy speech recognition accuracy by receiving geotagged audio signals that correspond to environmental audio recorded by multiple mobile devices in multiple geographic locations, receiving an audio signal that corresponds to an utterance recorded by a par... | 05/08/2012 |
| 8150686 | System and method for sending a message type identifier through an in-band modem A system and method is provided for sending a message type identifier through a speech codec (in-band) such as found in a wireless communication network. A first predetermined sequence with noise-like characteristics identifies a first message type. A second predete... | 04/03/2012 |
| 8145479 | Improving the quality of output audio signal,transferred as coded speech to subscriber's terminal over a network, by speech coder and decoder tandem pre-processing A method of pre-processing an audio signal transmitted to a user terminal via a communication network and an apparatus using the method are provided. The method of pre-processing the audio signal may prevent deterioration of a sound quality of the audio signal trans... | 03/27/2012 |
| 8086452 | Scalable coding apparatus and scalable coding method A scalable coding apparatus is provided to suppress deterioration of a quality of a coded signal in a normal frame next to a frame compensated for the occurrence of a data loss. The scalable coding apparatus is provided with a core-layer coding section (11) t... | 12/27/2011 |
| 8060363 | Audio signal encoding For an audio coding, noise suppression is applied to an original audio signal to obtain an audio signal with reduced noise. A coding mode is selected based on the audio signal with reduced noise. The original audio signal is then encoded using this selected coding m... | 11/15/2011 |
| 8024184 | Speech recognition device, speech recognition method, computer-executable program for causing computer to execute recognition method, and storage medium A speech recognition device and method configured to include a computer, for recognizing speech, including: a storage location for storing a feature quantity acquired from a speech signal for each frame; storage portions for storing acoustic model data and language ... | 09/20/2011 |
| 7983907 | Headset for separation of speech signals in a noisy environment A headset is constructed to generate an acoustically distinct speech signal in a noisy acoustic environment. The headset positions a pair of spaced-apart microphones near a user's mouth. The microphones each receive the user's speech, and also receive acoustic envir... | 07/19/2011 |
| 7822602 | Adaptive reduction of noise signals and background signals in a speech-processing system An audio input signal is filtered using an adaptive filter to generate a prediction output signal with reduced noise, wherein the filter is implemented using a plurality of coefficients to generate a plurality of prediction errors and to generate an error from the p... | 10/26/2010 |
| 7752040 | Stationary-tones interference cancellation An “Interference Canceller” provides a computationally efficient real-time technique for removing stationary-tone interference from signals. Typical sources of stationary tone contamination of signals include noise from power wiring (i.e., 50/60 Hz or 400 Hz and... | 07/06/2010 |
| 7739109 | System and process for muting audio transmission during a computer network-based, multi-party teleconferencing session A system and process for muting the audio transmission from a location of a participant engaged in a multi-party, computer network-based teleconference when that participant is working on a keyboard, is presented. The audio is muted as it is assumed the participant ... | 06/15/2010 |
| 7680653 | Background noise reduction in sinusoidal based speech coding systems A method and apparatus to reduce background noise in speech signals in order to improve the quality and intelligibility of processed speech. In mobile communications environment, speech signals are degraded by additive random noise. A randomness of the noise, which ... | 03/16/2010 |
| 7454332 | Gain constrained noise suppression A gain-constrained noise suppression for speech more precisely estimates noise, including during speech, to reduce musical noise artifacts introduced from noise suppression. The noise suppression operates by applying a spectral gain G(m, k) to each short-time spectr... | 11/18/2008 |
| 7437284 | Methods and systems for language boundary detection Disclosed are methods and systems for detecting boundaries between areas of different languages in a body of text. ... | 10/14/2008 |
| 7436786 | Telecommunications system for minimizing the effect of white noise data packets for the generation of required white noise on transmission channel utilization Minimizing the effects of the requisite AGWN packets on transmission channel utilization without diminishing any of the aesthetic quality of the AGWN white noise on the voice or audio communication. A system for minimizing the effect of required generated background... | 10/14/2008 |
| 7430255 | Impulse noise suppression device Digital audio data with error detection bits added thereto is inputted to an error detecting and correcting device (4). The correcting device (4) corrects an error when the error is detected in the digital audio data. The digital audio data outputted f... | 09/30/2008 |
| 7426464 | Signal processing apparatus and method for reducing noise and interference in speech communication and speech recognition The present invention uses a method of processing signals in which signals received from an array of sensors are subject to system having a first adaptive filter arranged to enhance a target signal and a second adaptive filter arranged to suppress unwanted signals. ... | 09/16/2008 |
| 7383178 | System and method for speech processing using independent component analysis under stability constraints A system and method for separating a mixture of audio signal into desired audio signals (430) (e.g., speech) and a noise sign (440) is disclosed. Microphones (310, 320) are positioned to receive the mixed audio signals, and an independent compon... | 06/03/2008 |
| 7379863 | Method and device for reducing scheduling delay in a digital communication system A method and device within a speech processing unit (SPU) for reducing scheduling delay between the SPU and a radio network node. Within the SPU, data packets are processed in a plurality of time slots that are subunits of frames. The device receives timing informat... | 05/27/2008 |
| 7373297 | Automated speech recognition filter An automated speech recognition filter is disclosed. The automated speech recognition filter device provides a speech signal to an automated speech platform that approximates an original speech signal as spoken into a transceiver by a user. In providing the speech s... | 05/13/2008 |
| 7366662 | Separation of target acoustic signals in a multi-transducer arrangement The present invention provides a process for separating a good quality information signal from a noisy acoustic environment. The separation process uses a set of at least two spaced-apart transducers to capture noise and information components. The transducer signal... | 04/29/2008 |
| 7359838 | Method of processing a noisy sound signal and device for implementing said method The invention relates to a method of processing a noisy sound signal and to a device for implementing said method. The inventive method includes the following steps which are performed for each frame of a noisy sound signal, consisting in: applying a frequency-domai... | 04/15/2008 |
| 7343283 | Method and apparatus for coding a noise-suppressed audio signal An unfiltered frame portion (2) from a second frame (503) is blended together with a filtered frame portion (1) from a first frame (501) to produce a combined frame portion (507). The combined frame portion (507) is then buf... | 03/11/2008 |
| 7330738 | Apparatus and method for canceling residual echo in a mobile terminal of a mobile communication system An apparatus for canceling an echo signal in a mobile terminal of a mobile communication system. A double talk detector (DTD) receives a first signal by canceling an estimated echo signal from a signal received through a microphone, outputs the first signal, and out... | 02/12/2008 |
| 7321559 | System and method of noise reduction in receiving wireless transmission of packetized audio signals A receiver for receiving wireless packetized audio signals having packet headers, and packet payloads including encoded audio signals is provided. The receiver includes an audio decoder for decoding the encoded audio signals into digital audio signals, an audio erro... | 01/22/2008 |
| 7319954 | Multi-channel codebook dependent compensation Methods and apparatus, in the context of speech recognition, for compensating in the cepstral domain for the effect of an interfering signal by using a reference signal. ... | 01/15/2008 |
| 7318028 | Method and apparatus for determining an estimate For determining an estimate of a need for information units for encoding a signal, a measure for the distribution of the energy in the frequency band is taken into account in addition to the admissible interference for a frequency band and an energy of the frequency... | 01/08/2008 |
| 7318023 | Method for detecting the quantization of spectra The invention comprises the retrieval of a quantized spectrum of audio-data, which had been compressed conforming to psychoacoustic principles. This spectrum can be identified with the aid of sorted (and logarithmized) differences of the magnitude of the amplitude. ... | 01/08/2008 |
| 7305337 | Method and apparatus for speech coding and decoding The present invention includes a method for speech encoding and decoding and a design of speech coder and decoder. The characteristic of speech encoding method relies on the type of data with high compression rate after the whole speech data is compressed. The prese... | 12/04/2007 |
| 7283956 | Noise suppression A method and apparatus for noise suppression is described herein. The channel gain is controlled based on a degree of variability of the background noise. The noise variability estimate is used in conjunction with a variable attenuation concept to produce a family o... | 10/16/2007 |
| 7277848 | Measuring and using reliability of complexity estimates during quality and rate control for digital audio An audio encoder regulates quality and bitrate with a control strategy. The strategy includes several features. First, an encoder regulates quantization using quality, minimum bit count, and maximum bit count parameters. Second, an encoder regulates quantization usi... | 10/02/2007 |
| 7272557 | Method and apparatus for quantizing model parameters A method of quantizing a model parameter includes applying the model parameter to a non-linear scaling function to produce a scaled model parameter and quantizing the scaled model parameter to form a quantized model parameter. In further embodiments, likelihoods for... | 09/18/2007 |
| 7266494 | Method and apparatus for identifying noise environments from noisy signals A method and apparatus are provided for identifying a noise environment for a frame of an input signal based on at least one feature for that frame. To identify the noise environment, a probability for a noise environment is determined by applying the noisy input fe... | 09/04/2007 |
| 7266236 | Accelerated handwritten symbol recognition in a pen based tablet computer The present invention provides a method and apparatus for accelerated handwritten symbol recognition in a pen based tablet computer. In one embodiment, handwritten symbols are translated into machine readable characters using special purpose hardware. In one embodim... | 09/04/2007 |
| 7246058 | Detecting voiced and unvoiced speech using both acoustic and nonacoustic sensors Systems and methods are provided for detecting voiced and unvoiced speech in acoustic signals having varying levels of background noise. The systems receive acoustic signals at two microphones, and generate difference parameters between the acoustic signals received... | 07/17/2007 |
| 7239713 | Wireless transmission system for hearing devices A transmission system for rearing devices is provided that, in spite of having less energy available, allows for a transmission relatively safe from interference. Such a gearing device has a self-exciting oscillation circuit as an antenna that enables an inductive c... | 07/03/2007 |
| 7240207 | Fingerprinting media entities employing fingerprint algorithms and bit-to-bit comparisons A system and methods for the creation, management, and distribution of media entity fingerprinting are provided. In connection with a system that convergently merges perceptual and digital signal processing analysis of media entities for purposes of classifying the ... | 07/03/2007 |
| 7236640 | Fixed, variable and adaptive bit rate data source encoding (compression) method According to the invention, quantization encoding is conducted using the probability density function of the source, enabling fixed, variable and adaptive rate encoding. To achieve adaptive encoding, an update is conducted with a new observation of the data source, ... | 06/26/2007 |
| 7228274 | Recognition of identification patterns The invention relates to a method and to a device for identifying markers in data blocks. The method is characterized in that a number of data blocks (201a 201n) are received by a receiver (202) and one specific data block from the... | 06/05/2007 |
| 7227960 | Robot and controlling method of the same An attention direction of a robot, indicated by a face, eyes or the like thereof, can be aligned with a directivity direction of a microphone array. Specifically, an acoustic signal from a sound source can be captured, and input signals for individual microphones ca... | 06/05/2007 |
