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| Number | Title | Issue Date |
| 7921008 | Methods and apparatus for voice activity detection A method for detecting voice activity comprises pre-processing a first frame in an audio frame sequence, receiving a subsequent frame as a current frame, calculating weighted linear prediction energy of the current frame based on Nth-order linear predicti... | 04/05/2011 |
| 7912710 | Apparatus and method for changing reproduction speed of speech sound A method for changing reproduction speed of speech sound, includes the steps of: storing an input sound signal in a buffer; leaving a sound signal from the buffer as it is or extending the sound signal from the buffer in a sound section where a power of the input so... | 03/22/2011 |
| 7869991 | Mobile terminal and operation control method for deleting white noise voice frames A mobile terminal and method of eliminating a call sound noise thereof are disclosed, by which a user can have a call of a clear sound quality by removing a frame including a white noise from a voice frame received from an originator terminal. The present invention ... | 01/11/2011 |
| 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 detector. The voice activity detector is a two-channel detector, which ena... | 12/09/2008 |
| 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 the dejitter buffer and decode them, and a concealed seconds meter co... | 10/07/2008 |
| 7424427 | Systems and methods for classifying audio into broad phoneme classes An audio classification system classifies sounds in an audio stream as belonging to one of a relatively small number of classes. The audio classification system includes a signal analysis component [301] and a decoder [302]. The decoder [302] in... | 09/09/2008 |
| 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 length buffer buffers frames that are not clearly identified as either... | 08/12/2008 |
| 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 applied to the frames thereby optimising the modification process. Th... | 08/12/2008 |
| 7373293 | Quantization noise shaping method and apparatus A method and apparatus for shaping quantization noise generated when compressing audio data at a low bit rate is disclosed. A predetermined quantization noise threshold allowed during quantization of sampled audio data and quantization noise energy information of a ... | 05/13/2008 |
| 7366658 | Noise pre-processor for enhanced variable rate speech codec An enhanced noise pre-processor in a speech codec smoothes channel energy estimate moving toward a first smoothing constant if a prior signal to noise ratio estimate for more than five channels are above a threshold and toward a second smaller smoothing constant oth... | 04/29/2008 |
| 7366461 | Method and apparatus for improving the quality of a recorded broadcast audio program Recordings of broadcast audio content often contain errors (e.g., noise, signal loss, interference, talkover). A method and apparatus are provided for improving the quality of such a recording. Multiple recordings of a broadcast audio program are identified, and are... | 04/29/2008 |
| 7359979 | Packet prioritization and associated bandwidth and buffer management techniques for audio over IP The present invention is directed to voice communication devices in which an audio stream is divided into a sequence of individual packets, each of which is routed via pathways that can vary depending on the availability of network resources. All embodiments of the ... | 04/15/2008 |
| 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 |
| 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 estimating is performed by extracting the set of scale factors from the com... | 04/08/2008 |
| 7349844 | Minimizing resource consumption for speech recognition processing with dual access buffering In a processor system for audio processing, such as voice recognition and text-to-speech, a dedicated front-end processor, a core processor and a dedicated back-end processor are provided which are coupled by dual access stack. When an analog audio signal is inputte... | 03/25/2008 |
| 7319761 | Method and apparatus for locating and correcting sound overload The invention describes a graphical method for detecting and adjusting audio overload conditions. The graphical user interface provides a user complete playback control of several audio tracks, detection of overload conditions such as audio clipping, and graphical m... | 01/15/2008 |
| 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 selects a first range of signals to be considered as noise, and a sec... | 11/27/2007 |
| 7292543 | Speaker tracking on a multi-core in a packet based conferencing system A distributed intelligence conferencing system having a plurality of conferencing nodes to connect groups of participants to a conference. Each of the conferencing nodes provides for the connection of one or more participants to the conference. Each node includes a ... | 11/06/2007 |
| 7286980 | Speech processing apparatus and method for enhancing speech information and suppressing noise in spectral divisions of a speech signal A speech processing apparatus and method may identify divisions of a signal spectrum as having a speech component or having no speech component. A comb filter is generated, based on a high-accuracy speech pitch obtained in the identified speech component divisions, ... | 10/23/2007 |
| 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 |
| 7283953 | Process for identifying excess noise in a computer system The method of identifying excess noise in a computer system includes first recording a silence sample; second recording an isolated noise sample while operating a computer system component in isolation from other computer system components; comparing signal characte... | 10/16/2007 |
| 7272213 | Method, system and article of manufacture for bookmarking voicemail messages A voicemail system includes a voicemail bookmarking procedure that permits users to bookmark voicemail messages during message playback. Upon receiving a bookmark request from a user, the procedure generates a bookmark pointer defining a starting point for subsequen... | 09/18/2007 |
| 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 access network receives an input voice signal (including noise) and ... | 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 |
| 7263485 | Robust detection and classification of objects in audio using limited training data A method (200) and apparatus (100) for classifying a homogeneous audio segment are disclosed. The homogeneous audio comprises a sequence of audio samples (x(n)). The method (200) starts by forming a sequence of frames (701-704) alo... | 08/28/2007 |
| 7260190 | System and method for managing voicemails using metadata A system and method for managing voicemails using metadata is presented. The metadata includes an audible introduction which a user records and associates the audible introduction to a voicemail. The user is also able to associate other types of metadata to a voicem... | 08/21/2007 |
| 7236929 | Echo suppression and speech detection techniques for telephony applications Various methods and apparatus are described for implementing effective echo suppression in a wide variety of telephony system architectures. These methods and apparatus include broadband and multi-band techniques for speech detection, estimation of near-end transmis... | 06/26/2007 |
| 7236926 | System and method for voice transmission over network protocols A system and method for voice transmission over high level network protocols. On the Internet and the World Wide Web, such high level protocols are HTTP/TCP. The restrictions imposed by firewalls and proxy servers are avoided by using HTTP level connections to trans... | 06/26/2007 |
| 7233899 | Speech recognition system using normalized voiced segment spectrogram analysis Computer comparison of one or more dictionary entries with a sound record of a human utterance to determine whether and where each dictionary entry is contained within the sound record. The record is segmented, and for each vocalized segment a spectrogram is obtaine... | 06/19/2007 |
| 7231350 | Speaker verification system using acoustic data and non-acoustic data A method and system for speech characterization. One embodiment includes a method for speaker verification which includes collecting data from a speaker, wherein the data comprises acoustic data and non-acoustic data. The data is used to generate a template that inc... | 06/12/2007 |
| 7230955 | System and method for improved use of voice activity detection The present invention is a system and method for packetizing actual noise signals, typically background noise, received by an access gateway from a speaking party and transmitting these packetized noise signals via a network to an egress gateway. The egress gateway ... | 06/12/2007 |
| 7222069 | Voice code conversion apparatus Disclosed is a voice code conversation apparatus to which voice code obtained by a first voice encoding method is input for converting this voice code to voice code of a second voice encoding method. The apparatus includes a code separating unit for separating, from... | 05/22/2007 |
| 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 signal section candidate from the input signal. A signal section classif... | 04/10/2007 |
| 7191127 | System and method for speech enhancement A method and apparatus for reducing noise in a speech signal. A handset or remote unit provides to users with a hearing deficiency, a first mode of operation where noise suppressant/speech enhancement algorithms are used during any auditory-related service. There is... | 03/13/2007 |
| 7184952 | Method and system for masking speech A simple and efficient method for producing an obfuscated speech signal which may be used to mask a stream of speech, is disclosed. A speech signal representing the speech stream to be masked is obtained. The speech signal is then temporally partitioned into segment... | 02/27/2007 |
| 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, words, and phrases to convey certain aspects of meaning; informally, pros... | 02/13/2007 |
| 7174291 | Noise suppression circuit for a wireless device An adaptive noise suppression system includes an input A/D converter, an analyzer, a filter, and a output D/A converter. The analyzer includes both feed-forward and feedback signal paths that allow it to compute a filtering coefficient, which is input to the filter.... | 02/06/2007 |
| 7171018 | Portable devices and methods employing digital watermarking Media objects are transformed into active, connected objects via identifiers embedded into them or their containers. In the context of a user's playback experience, a decoding process extracts the identifier from a media object and possibly additional context inform... | 01/30/2007 |
| 7161905 | Method and system for managing time-sensitive packetized data streams at a receiver According to one embodiment of the invention, a method for managing time-sensitive packetized data streams at a receiver includes receiving a time-sensitive packet of a data stream, analyzing an energy level of a payload signal of the packet, and determining whether... | 01/09/2007 |
| 7162426 | Computer motherboard architecture with integrated DSP for continuous and command and control speech processing The invention is essentially a motherboard design for personal computers which uses DSP hardware in conjunction with a general or specific purpose CPU to process command and continuous speech. The DSP hardware serves as a bridge between the audio input of the sound ... | 01/09/2007 |
