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7619995 |
Transcoders and mixers for voice-over-IP conferencing
Transcoders and mixers having reduced algorithmic delay and processing complexity. An improved mixer for signals having encoded speech parameters wherein the parameters obtained through decoding...
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7617095 |
Systems and methods for detecting silences in audio signals
Silences are detected when a local signal power is below a given fixed or relative threshold value, the duration of the local signal power being below the given fixed or relative threshold value is...
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7617094 |
Methods, apparatus, and products for identifying a conversation
One aspect of the invention is a method of using a computer to identify a conversation. Another aspect is a method for an audio processing system that identifies conversations and enhances each...
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7599357 |
Method and apparatus for detecting and correcting electrical interference in a conference call
The present invention enables a network to detect electrical interference caused by cellular phones and correct the problem by playing a network announcement to the network operator if the...
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7574353 |
Transmit/receive data paths for voice-over-internet (VoIP) communication systems
The present invention is a method and apparatus in a data processing system that includes a Voice over Internet Protocol (VoIP) communication system for improving transmit and receive data paths....
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7555430 |
Selective multi-pass speech recognition system and method
Method and apparatus for multi-pass speech recognition. An input device receives spoken input. A processor performs a first pass speech recognition technique on the spoken input and forms first...
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7555429 |
Sound signal processing apparatus and degree of speech computation method
Speech likeliness or a degree of speech is determined with a simple configuration or with a small amount of processing, and speech parts are separated from an input sound signal. The input sound...
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7546238 |
Digital circuit transmission device
A digital line transmission unit can carry out switching between speech codecs during the same call to achieve balance between making effective use of a line and a high sound quality without...
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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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7526428 |
System and method for noise cancellation with noise ramp tracking
A system and method for noise cancellation with noise ramp tracking in the presence of severe or ramping acoustic noise. The system conducts an estimation of the noise level in the input signal and...
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7516065 |
Apparatus and method for correcting a speech signal for ambient noise in a vehicle
A speech correction apparatus includes a speaker for generating guidance speech; a microphone set at a hearing position; an acoustic-characteristic setting unit for separating ambient noise from...
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7487083 |
Method and apparatus for discriminating speech from voice-band data in a communication network
A method and an apparatus accurately discriminates between speech and voice-band data (VBD) in a communication network by calculating self similarity ratio (SSR) values, which indicate periodicity...
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7478042 |
Speech decoder that detects stationary noise signal regions
A first determiner 121 tentatively determines whether the current processing unit represents a stationary noise period, based on stationary properties of a decoded signal. Based on the tentative...
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7472058 |
Automatic audio source detection for capture devices
A method for selecting an audio source when capturing audio data with at least one capture device includes connecting an audio source to an audio input port of the capture device, turning off the...
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7469207 |
Method and system for providing automated audible backchannel responses
A voice processing system comprises a processing device that processes and receives a stream of voice input as a user is speaking. A software program executes program steps for determining a...
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7464029 |
Robust separation of speech signals in a noisy environment
A method for improving the quality of a speech signal extracted from a noisy acoustic environment is provided. In one approach, a signal separation process is associated with a voice activity...
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7433822 |
Method and apparatus for encoding and decoding pause information
At an audio source, pause information is added to audio data, the combination of which is subsequently packetized. The resulting packets are transmitted to an audio destination via a network in...
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7433358 |
Characterization of impaired intervals in a voice over packet session using audio frame loss concealment
An embodiment may include an apparatus comprising a dejitter buffer to receive packets containing audio data, a codec coupled with the dejitter buffer, the codec to receive coded audio frames from...
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7418156 |
Domain of definition in warper/morpher
An efficient way to perform rendering operations in an image processing environment includes a warping engine having a warping module and a domain of definition (DOD) module. When an object is...
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7412379 |
Time-scale modification of signals
Techniques utilising Time Scale Modification (TSM) of signals are described. The signal is analysed and divided into frames of similar signal types. Techniques specific to the signal type are then...
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7412376 |
System and method for real-time detection and preservation of speech onset in a signal
A “speech onset detector” provides a variable length frame buffer in combination with either variable transmission rate or temporal speech compression for buffered signal frames. The variable...
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7406096 |
Tandem-free intersystem voice communication
Techniques are presented herein to provide tandem-free operation between two wireless terminals through two otherwise incompatible wireless networks. Specifically, embodiments provide tandem-free...
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7403893 |
Method and apparatus for reconstructing voice information
A communication system includes a destination that receives voice samples and a voice parameter generated by a source. The destination uses the voice samples and voice parameter to reconstruct...
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7376556 |
Method for processing speech signal features for streaming transport
Speech signal information is formatted, processed and transported in accordance with a format adapted for TCP/IP protocols used on the Internet and other communications networks. NULL characters...
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7366667 |
Method and device for pause limit values in speech recognition
Method and device for the recognition of words and pauses in a voice signal. The words (W i ) spoken in a row and pauses (T i ) are thereby combined as to be appertaining to a word group as soon as...
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7356464 |
Method and device for estimating signal power in compressed audio using scale factors
Estimating a signal power in a compressed audio signal [A] is provided, the audio signal comprising blocks of quantized samples, a given block being provided with a set of scale factors. The...
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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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7302388 |
Method and apparatus for detecting voice activity
Method and apparatus detect voice activity for spectrum or power efficiency purposes. The method determines and tracks the instant, minimum and maximum power levels of the input signal. The method...
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7299173 |
Method and apparatus for speech detection using time-frequency variance
Speech presence is detected by first bandpass filtering ( 141, 143, 145 ) the speech to split it into banks of sub-bands. A matrix of shift registers ( 150 ) store each sub-band of speech. A power...
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7272552 |
Voice activity detection and silence suppression in a packet network
The present invention is a system and method that improves upon voice activity detection by packetizing actual noise signals, typically background noise. In accordance with the present invention an...
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7243063 |
Classifier-based non-linear projection for continuous speech segmentation
A method segments an audio signal including frames into non-speech and speech segments. First, high-dimensional spectral features are extracted from the audio signal. The high-dimensional features...
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7233895 |
Apparatus and method to compensate for unsynchronized transmission of synchrous data using a sorted list
A low energy detector maintains a sorted list that defines to the circuit removing samples from the queue the location and energy of all samples that fall below the predetermined energy level. This...
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7228271 |
Telephone apparatus
The telephone apparatus of the present invention comprises a first voice band expander for generating a voiced signal frequency component by shifting the frequency of the voice signal received, a...
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7203640 |
System and method for determining an intended signal section candidate and a type of noise section candidate
An input signal is input via an input part. A plurality of signal section candidate detecting parts having different detection algorithms detect an intended signal section candidate and a noise...
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7203638 |
Method for interoperation between adaptive multi-rate wideband (AMR-WB) and multi-mode variable bit-rate wideband (VMR-WB) codecs
A source-controlled Variable bit-rate Multi-mode WideBand (VMR-WB) codec, having a mode of operation that is interoperable with the Adaptive Multi-Rate wideband (AMR-WB) codec, the codec...
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7177810 |
Method and apparatus for performing prosody-based endpointing of a speech signal
A method and apparatus for finding endpoints in speech by utilizing information contained in speech prosody. Prosody denotes the way speakers modulate the timing, pitch and loudness of phones,...
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7162418 |
Presentation-quality buffering process for real-time audio
A buffering process for real-time digital audio is provided to effect of network “jitter” from inconsistent network packet delivery rates. The buffering algorithm is particularly useful for...
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7155385 |
Automatic gain control for adjusting gain during non-speech portions
An estimate is made of the power of a speech portion of a speech signal that includes speech portions separated by non-speech portions, the power for the speech portion being estimated based on a...
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7136630 |
Methods of recording voice signals in a mobile set
The present invention relates to a mobile set integrating a memory efficient data storage system for the real time recording of voice conversations, data transmission and the like. The data...
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7130797 |
Robust talker localization in reverberant environment
A method of locating a talker in a reverberant environment comprises receiving multiple audio signals from a microphone array that include direct path audio signal and reverberation signal...
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7130793 |
System and method for minimizing overrun and underrun errors in packetized voice transmission
When it is determined that a sample queue exceeds a first predefined level, samples being received from a IP switched network are modified such that samples are removed within the voiced region of...
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7127392 |
Device for and method of detecting voice activity
The present invention is a device for and method of detecting voice activity. First, the AM envelope of a segment of a signal of interest is determined. Next, the number of times the AM envelope...
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7092875 |
Speech transcoding method and apparatus for silence compression
A first CN code (silence code) obtained by encoding a silence signal, which is contained in an input signal, by a silence compression function of a first speech encoding scheme is transcoded to a...
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7080007 |
Apparatus and method for computing speech absence probability, and apparatus and method removing noise using computation apparatus and method
An apparatus and a method for computing a Speech Absence Probability (SAP), and an apparatus and a method for removing noise by using the SAP computing device and method are provided. The provided...
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7075907 |
Method for signalling DTX periods and allocation of new channels in a statistical multiplexed radio interface
A method for operating a wireless communications system includes a step of signalling, between a mobile station to a network, that the mobile station or the network is temporarily ceasing...
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7072831 |
Estimating the noise components of a signal
Enhanced estimation of the noise component of a signal is accomplished by using a plurality of filters. Each filter provides an estimate of a minimum sample in a sample set that includes a...
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7072828 |
Apparatus and method for improved voice activity detection
Problems of front-end clipping and excessively long holdover times in digitally encoded speech are resolved by the introduction of a queue at the transmitting end of a digital conversation. Samples...
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7065486 |
Linear prediction based noise suppression
Various time-domain noise suppression methods and devices for suppressing a noise signal in a speech signal are provided. For example, a time-domain noise suppression method comprises estimating a...
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7058889 |
Synchronizing text/visual information with audio playback
A method of synchronizing visual information with audio playback includes the steps of selecting a desired audio file from a list stored in memory associated with a display device, sending a signal...
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7024353 |
Distributed speech recognition with back-end voice activity detection apparatus and method
In a distributed voice recognition system, a back-end pattern matching unit 27 can be informed of voice activity detection information as developed through use of a back-end voice activity...
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