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7630902 |
Apparatus and methods for digital audio coding using codebook application ranges
A low bit rate digital audio coding system includes an encoder which assigns codebooks to groups of quantization indexes based on their local properties resulting in codebook application ranges...
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7627468 |
Apparatus and method for extracting syllabic nuclei
An apparatus enabling automatic determination of a portion that reliably represents a feature of a speech waveform includes: an acoustic/prosodic analysis unit calculating, from data, distribution...
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7603273 |
Simultaneous multi-user real-time voice recognition system
This invention is a combination of software and hardware components and methodologies that enable voice recognition for multiple users simultaneously. It introduces the concept of a...
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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....
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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...
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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, W...
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7584106 |
Method and apparatus for reducing access delay in discontinuous transmission packet telephony systems
A system, method and computer-readable medium are disclosed for operating a communications network. The method aspect comprises receiving a signal and removing a first portion of a frame of the...
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7580893 |
Acoustic signal coding method and apparatus, acoustic signal decoding method and apparatus, and acoustic signal recording medium
Acoustic signal encoder is provided which comprises a subband filter band to divide an original signal into a plurality of frequency bands, a spectrum transformation circuit to detect the amplitude...
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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...
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7542897 |
Condensed voice buffering, transmission and playback
This disclosure is directed to techniques for condensed voice buffering, transmission and playback. The techniques may involve identification of encoded voice frames as either speech or a pause,...
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7523037 |
Data synthesis apparatus and program
A data synthesis apparatus detects the start of a period of voice waveform data, stores the voice waveform data in a first storage device, starting with its part indicative of the start of the...
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7519538 |
Audio signal encoding or decoding
Encoding an audio signal is provided wherein the audio signal includes a first audio channel and a second audio channel, the encoding comprising subband filtering each of the first audio channel...
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7516066 |
Audio coding
According to a first aspect of the invention, at least part of an audio signal is coded in order to obtain an encoded signal, the coding comprising predictive coding the at least part of the audio...
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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...
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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...
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7496517 |
Method and device for generating a scalable data stream and method and device for decoding a scalable data stream with provision for a bit saving bank function
In a method for generating a scalable data stream from one or several blocks of output data of a first encoder and from one or several blocks of output data of a second encoder a determining data...
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7480613 |
Method of supporting the proof-reading of speech-recognized text with a replay speed adapted to the recognition reliability
The invention relates to a method of supporting the proof-reading of a text ( 2, 30 ) obtained in particular by speech recognition from a speech signal ( 1 ), of which at least one text component...
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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...
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7457756 |
Method of generating time-frequency signal representation preserving phase information
A method of generating a time-frequency representation of a signal that preserves phase information by receiving the signal, calculating a joint time-frequency domain of the signal, estimating...
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7454354 |
Hierarchical lossless encoding/decoding method, hierarchical lossless encoding method, hierarchical lossless decoding method, its apparatus and program
A hierarchical lossless encoding and decoding technology for digital signals such as of music data, audio data, or the like. A lossless reproduced signal is made identical to an input signal even...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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7346502 |
Adaptive noise state update for a voice activity detector
There is provided a method of updating a noise state of a voice activity detector (VAD) for indicating an active voice mode and an inactive voice mode. The method comprises receiving an input...
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7333619 |
Fast wavelet estimation of weak bio-signals using novel algorithms for generating multiple additional data frames
A method and apparatus for de-noising weak bio-signals having a relatively low signal to noise ratio utilizes an iterative process of wavelet de-noising a data set comprised of a new set of frames...
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7328149 |
Audio segmentation and classification
A portion of an audio signal is separated into multiple frames from which one or more different features are extracted. These different features are used, in combination with a set of rules, to...
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7324944 |
Systems and methods for dynamically analyzing temporality in speech
Systems and methods for dynamically analyzing temporality in an individual's speech in order to selectively categorize the speech fluency of the individual and/or to selectively provide speech...
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7321851 |
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...
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7305338 |
Apparatus and method for concealing erased periodic signal data
Circuitry and a method compensate the erasure of speech signal data or similar periodic signal data, by substitution using past periodic signal data input. After a predetermined number of latest...
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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...
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7302064 |
Fast estimation of weak bio-signals using novel algorithms for generating multiple additional data frames
A method and apparatus for de-noising weak bio-signals having a relatively low signal to noise ratio utilizes an iterative process of de-noising a data set comprised of a new set of frames. The...
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7299184 |
Method and apparatus to prepare listener-interest-filtered works
An embodiment of the present invention is a method for generating a listener-interest-filtered work for an audio or audio-visual work, which method includes steps of: (a) generating one or more...
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7277847 |
Method for determining intensity parameters of background noise in speech pauses of voice signals
A method for determining intensity characteristics of background noise during speech pauses of speech signals includes determining a proportion of speech pauses in the undisturbed source speech...
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7254532 |
Method for making a voice activity decision
The invention relates to a method for determining voice activity in a signal section of an audio signal. The result, i.e., whether voice activity is present in the section of the signal thus...
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7251596 |
Method and device for analyzing a wave signal and method and apparatus for pitch detection
The present invention provides a unique wave-trigon transformation (WTT) method for performing transformation process over a wave signal. The present invention also provides a pitch detecting...
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7239999 |
Speed control playback of parametric speech encoded digital audio
A method of pitch corrected speed control (PCSC) playback in which a decoder rate controller receives a desired playback speed from a PCSC controller and determines the number of decoded digital...
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7231344 |
Method and apparatus for gradient-descent based window optimization for linear prediction analysis
The shape of windows used during linear predictive analysis can be optimized through the use of gradient-descent based window optimization procedures. Window optimization may be achieved fairly...
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7219061 |
Method for detecting the time sequences of a fundamental frequency of an audio response unit to be synthesized
Predetermined macrosegments of the fundamental frequency are determined by a neural network, and these predefined macrosegments are reproduced by fundamental-frequency sequences stored in a...
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7197464 |
Method and apparatus for reducing access delay in discontinuous transmission packet telephony systems
A system, method and computer-readable medium are disclosed for operating a communications network. The method aspect comprises receiving an audio signal and to remove a first portion of a frame of...
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7143047 |
Time-scale modification of data-compressed audio information
A data-compressed audio waveform is temporally modified without requiring complete decompression of the audio signal. Packets of compressed audio data are first unpacked, to remove scaling that was...
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7143029 |
Apparatus and method for changing the playback rate of recorded speech
An apparatus for changing the playback rate of recorded speech includes memory storing a plurality of recorded speech messages and a plurality of feature tables. Each feature table is associated...
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7139699 |
Method for analysis of vocal jitter for near-term suicidal risk assessment
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...
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7120577 |
Virtual presence
A system and terminal for facilitating a “virtual presence” allows users on a communication network to simply begin speaking through other users. A system immediately detects the destination...
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