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| Number | Title | Issue Date |
| 8155954 | Device and method for generating a complex spectral representation of a discrete-time signal A filter bank device for generating a complex spectral representation of a discrete-time signal includes a generator for generating a block-wise real spectral representation, which, for example, implements an MDCT, to obtain temporally successive blocks of real spec... | 04/10/2012 |
| 8090575 | Voice modulation recognition in a radio-to-SIP adapter A radio-to-SIP adapter is shown to include a voice detection algorithm processor as well as other circuitry to provide an interface between a radio and SIP adapter to accommodate a transition from half duplex to full duplex and to cause a radio to transmit when huma... | 01/03/2012 |
| 8065139 | Method of audio encoding There is described a method of encoding an input signal (20) to generate a corresponding encoded output signal (30), and also encoders (10) arranged to implement the method. The method comprises steps of: (a) distributing the input signal to sub... | 11/22/2011 |
| 8032360 | System and method for high-quality variable speed playback of audio-visual media A system and method for high-quality variable speed playback of audio-visual (A/V) media is provided. The system receives an encoded visual signal and an encoded audio signal. The encoded visual signal is decoded to generate a decoded visual signal and the encoded a... | 10/04/2011 |
| 8019598 | Phase locking method for frequency domain time scale modification based on a bark-scale spectral partition This invention improves the perceived quality of frequency-domain time scale modification by selection of spectral bands used in phase locking based upon a Bark scale according to the variation in human hearing frequency response. A spectral peak is identified for e... | 09/13/2011 |
| 8005667 | Methods and systems for sample rate conversion Methods and systems for sample rate conversion convert a sampled signal to a higher data rate signal. Conversion pulses are received, having a conversion rate that is higher than the sample rate of the sampled signal. Sample points are then reconstructed from the sa... | 08/23/2011 |
| 7957960 | Audio time scale modification using decimation-based synchronized overlap-add algorithm A high-quality, low-complexity audio time scale modification (TSM) algorithm useful in speeding up or slowing down the playback of an encoded audio signal without changing the pitch or timbre of the audio signal. The TSM algorithm uses a modified synchronized overla... | 06/07/2011 |
| 7930172 | Global boundary-centric feature extraction and associated discontinuity metrics Portions from time-domain speech segments are extracted. Feature vectors that represent the portions in a vector space are created. The feature vectors incorporate phase information of the portions. A distance between the feature vectors in the vector space is deter... | 04/19/2011 |
| 7899668 | Method and apparatus to prepare listener-interest-filtered works An embodiment of the present invention is a method for testing an audience member's comprehension rate and presenting material in a media work at a rate determined from the comprehension rate, the method including: (a) determining a comprehension rate for materials ... | 03/01/2011 |
| 7856353 | Method for processing speech signal data with reverberation filtering Method for processing speech signal data. A speech signal is divided into frames. Each frame is characterized by a frame number T representing a unique interval of time. Each speech signal is characterized by a power spectrum with respect to frame T and frequency ba... | 12/21/2010 |
| 7848920 | Method and system of dynamically adjusting a speech output rate to match a speech input rate A method (10) and system of adjusting a speech output rate to match a speech input rate can include the steps of receiving (12) speech input, computing (14) a speech input rate, and dynamically adjusting (18 or 26) a speech output ... | 12/07/2010 |
| 7797153 | Speech signal separation apparatus and method A speech signal separation apparatus for separating an observation signal in a time domain of a plurality of channels wherein a plurality of signals having a speech signal are mixed using independent component analysis to produce a plurality of separation signals of... | 09/14/2010 |
| 7711555 | Method for compression and expansion of digital audio data Digital audio data are divided into a plurality of frames, each of which includes a desired number of sub-band samples, which are gradually increased in a range between “16” and “1024”, and are then compressed by way of psychoacoustics analysis and quantizat... | 05/04/2010 |
| 7711554 | Sound packet transmitting method, sound packet transmitting apparatus, sound packet transmitting program, and recording medium in which that program has been recorded Input speech is coded in an encoder (11), the coded speech is decoded in a decoder (12), compensatory speech which compensates the speech of the current frame is generated in a compensatory speech generating part (20) by using past decoded speec... | 05/04/2010 |
| 7707030 | Device and method for generating a complex spectral representation of a discrete-time signal A filter bank device for generating a complex spectral representation of a discrete-time signal includes a generator for generating a block-wise real spectral representation, which, for example, implements an MDCT, to obtain temporally successive blocks of real spec... | 04/27/2010 |
| 7684977 | User adaptive system and control method thereof In an interface unit, an input section obtains an input signal of user's speech or the like and an input processing section processes the input signal and detects information relating to the user. On the basis of the detection result, a response contents determinati... | 03/23/2010 |
| 7664635 | Adaptive voice detection method and system A system for detecting a voice signal includes: a first integrator for receiving an input signal and for providing a first integrator output signal, wherein the first integrator includes a first attack time; a second integrator for receiving the input signal and for... | 02/16/2010 |
| 7657428 | System and method for seamless switching of compressed audio streams A system and method for seamless switching and concatenation of compressed audio streams in Internet, Digital Radio, Digital Television, DVD, storage, and other applications. The technology allows switching between streams at pre-determined points without the introd... | 02/02/2010 |
| 7643990 | Global boundary-centric feature extraction and associated discontinuity metrics Portions from time-domain speech segments are extracted. Feature vectors that represent the portions in a vector space are created. The feature vectors incorporate phase information of the portions. A distance between the feature vectors in the vector space is deter... | 01/05/2010 |
| 7590525 | Frame erasure concealment for predictive speech coding based on extrapolation of speech waveform A method and system are provided for synthesizing a number of corrupted frames output from a decoder including one or more predictive filters. The corrupted frames are representative of one segment of a decoded signal (sq(n)) output from the decoder. The method comp... | 09/15/2009 |
| 7590526 | Method for processing speech signal data and finding a filter coefficient Method and computing apparatus for processing speech signal data. A speech signal is divided into frames. Each frame is characterized by a frame number T representing a unique interval of time. Each speech signal is characterized by a power spectrum with respect to ... | 09/15/2009 |
| 7587313 | Audio coding The method creates an audio stream comprising tracks of sinusoidal components linked across a plurality of sequential time segments. Segments in each track are weighted with a normal window (WI, W2, W3), and consecutive segments have a normal period of... | 09/08/2009 |
| 7565285 | Detecting near-term suicidal risk utilizing vocal jitter Method and apparatus to measure jitter (period-to-period fluctuations in fundamental frequency) among the voices of suicidal, major depressed, and non-suicidal patients to predict near-term suicidal risk. ... | 07/21/2009 |
| 7536300 | Method and apparatus to determine and use audience affinity and aptitude Embodiments of the present invention provide method and apparatus for determining audience affinity and/or aptitude in portions of media works and for developing information that represent measures of the audience affinity and/or aptitude. Further embodiments of pre... | 05/19/2009 |
| 7512534 | Optimized windows and methods therefore for gradient-descent based window optimization for linear prediction analysis in the ITU-T G.723.1 speech coding standard Primary and alternate optimization procedures are used to improve the ITU-T G.723.1 speech coding standard (the “Standard”) by replacing the Hamming window of the Standard with an optimized window, with two windows, or with two windows and an additional performa... | 03/31/2009 |
| 7509253 | Device for determining latency between stimulus and response A device which uses an input of speech and measures latency between stimulus and response. The device generally includes an input transducer for converting a stimulus speech sound into an electrical signal and transmits the electrical signal to an electric circuit. ... | 03/24/2009 |
| 7502733 | Method and arrangement in a communication system The present invention relates to the decoding/playback part of received sound data packets in systems for transmission of sound over packet switched networks. According to the invention, the lengths of received signal frames are manipulated by performing time expans... | 03/10/2009 |
| 7460991 | System and method for shaping a data signal for embedding within an audio signal There is described a number of encoders for encoding a data signal within an audio signal. In some of the encoders, the audio signal is separated into a tonal part and a residual part, and the data signal is shaped based on the residual part. In other encoders, the ... | 12/02/2008 |
| 7444281 | Method and communication apparatus generation packets after sample rate conversion of speech stream A method for generating speech packets and a communication apparatus implementing the method and functioning as a first node of a communication system. A first stream of digital speech samples having a first sample rate is provided (201). If the first sample ... | 10/28/2008 |
| 7412378 | Method and system of dynamically adjusting a speech output rate to match a speech input rate A method (10) and system of adjusting a speech output rate to match a speech input rate can include the steps of receiving (12) speech input, computing (14) a speech input rate, and dynamically adjusting (18 or 26) a speech output ... | 08/12/2008 |
| 7409339 | Methods and systems for sample rate conversion Methods and systems for sample rate conversion convert a sampled signal to a higher data rate signal. Conversion pulses are received, having a conversion rate that is higher than the sample rate of the sampled signal. Sample points are then reconstructed from the sa... | 08/05/2008 |
| 7406409 | System and method for recording and reproducing multimedia based on an audio signal A system and method summarizes multimedia stored in a compressed multimedia file partitioned into a sequence of segments, where the content of the multimedia is, for example, video signals, audio signals, text, and binary data. An associated metadata file includes i... | 07/29/2008 |
| 7392178 | Chaos theoretical diagnosis sensitizer The present invention is a preprocessing apparatus including a voice input apparatus for acquiring an uttered voice, an analog-digital conversion apparatus for converting the acquired uttered voice to digital voice data, and a comparator for selecting voice data, ha... | 06/24/2008 |
| 7389226 | Optimized windows and methods therefore for gradient-descent based window optimization for linear prediction analysis in the ITU-T G.723.1 speech coding standard Primary and alternate optimization procedures are used to improve the ITU-T G.723.1 speech coding standard (the “Standard”) by replacing the Hamming window of the Standard with an optimized window, with two windows, or with two windows and an additional performa... | 06/17/2008 |
| 7376555 | Encoding and decoding of overlapping audio signal values by differential encoding/decoding Coding a signal is provided, wherein a first set of values is provided related to subsequent times in a first time interval of the signal, a second set of values is provided related to subsequent times in a second time interval of the signal, the first time interval... | 05/20/2008 |
| 7373294 | Intonation transformation for speech therapy and the like The intonation of speech is modified by an appropriate combination of resampling and time-domain harmonic scaling. Resampling increases (upsampling) or decreases (downsampling) the number of data points in a signal. Harmonic scaling adds or removes pitch cycles to o... | 05/13/2008 |
| 7373298 | Apparatus and method for coding excitation signal An excitation signal coding apparatus capable of improving an error resilience by changing an excitation vector search method (more specifically, an error minimization criterion during a search). This coding apparatus is allowed to choose either of an ordinary searc... | 05/13/2008 |
| 7366659 | Methods and devices for selectively generating time-scaled sound signals Time-scaled, sound signals (i.e. sounds output at differing speeds) are generated by mixing weighted time-and frequency-domain processed signals, the former signal generally representing speech-based signals while the latter representing music-based signals. The wei... | 04/29/2008 |
| 7363232 | Method and system for enabling audio speed conversion The present invention provides a method and system for processing an audio signal. According to an exemplary method, an audio signal such as a digital voice signal is received and divided into one or more individual unit cycles. An audio speed conversion operation i... | 04/22/2008 |
| 7359006 | Audio module supporting audio signature A system and method embed an audio signature in a video frame. An audio signature is generated from one bit a buffer input data. Two registers store an audio signature and reference count. According to an embodiment, the audio signature is generated left/right (L/R)... | 04/15/2008 |
