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| Number | Title | Issue Date |
| 8108210 | Apparatus and method to eliminate noise from an audio signal in a portable recorder by manipulating frequency bands A noise removing apparatus and method usable in a portable recorder to remove noise and enhance a voice signal when the voice signal with noise is input to the portable recorder. The noise removing method includes dividing an input signal into a high frequency compo... | 01/31/2012 |
| 8086449 | Vocal fry detecting apparatus A VF detecting apparatus capable of highly accurate vocal fry (VF) detection includes: a very-short-term peak detection processing unit framing a speech signal with a first frame of a first frame length and first frame shift amount and detecting each power peak; a s... | 12/27/2011 |
| 8073686 | Apparatus, method and computer program product for feature extraction A feature extraction apparatus includes a spectrum calculating unit that calculates, based on an input speech signal, a frequency spectrum having frequency components obtained at regular intervals on a logarithmic frequency scale for each of frames that are defined ... | 12/06/2011 |
| 8050910 | Pitch extraction with inhibition of harmonics and sub-harmonics of the fundamental frequency The fundamental frequency of a harmonic signal is estimated by forming a fundamental frequency hypothesis (f0′). A comb filter is provided based on the fundamental frequency hypothesis. The harmonic signal is filtered using the comb filter. The fundamental frequen... | 11/01/2011 |
| 8036885 | Method and device for adaptive bandwidth pitch search in coding wideband signals A pitch search method and device for digitally encoding a wideband signal, in particular but not exclusively a speech signal, in view of transmitting, or storing, and synthesizing this wideband sound signal. The new method and device which achieve efficient modeling... | 10/11/2011 |
| 8014999 | Frequency compensation for perceptual speech analysis The invention provides a softscaled frequency compensation function that allows the evaluation of a first quality measure indicating a global impact of all distortions in an audio transmission system, including linear frequency response distortions and second qualit... | 09/06/2011 |
| 8010350 | Decimated bisectional pitch refinement A method and system for refining an estimated pitch period estimate based on a coarse pitch useful for performing frame loss concealment in an audio decoder as well as for other applications. A normalized correlation at the coarse pitch lag is computed and used as t... | 08/30/2011 |
| 8010351 | Speech coding system to improve packet loss concealment A speech coding method of significantly reducing error propagation due to voice packet loss, while still greatly profiting from a pitch prediction or Long-Term Prediction (LTP), is achieved by limiting or reducing a pitch gain only for the first subframe or the firs... | 08/30/2011 |
| 8005666 | Automatic system for temporal alignment of music audio signal with lyrics An automatic system for temporal alignment between a music audio signal and lyrics is provided. The automatic system can prevent accuracy for temporal alignment from being lowered due to the influence of non-vocal sections. Alignment means of the system is provided ... | 08/23/2011 |
| 7996214 | System and method of exploiting prosodic features for dialog act tagging in a discriminative modeling framework Disclosed are a system and method for exploiting information in an utterance for dialog act tagging. An exemplary method includes receiving a user utterance, computing at periodic intervals at least one parameter in the user utterance, quantizing the at least one pa... | 08/09/2011 |
| 7974837 | Audio encoding apparatus, audio decoding apparatus, and audio encoded information transmitting apparatus The encoding apparatus includes an MDCT unit which transforms an inputted audio signal into a frequency parameter, for every predetermined time-frequency transformation frame length, and an MDCT coefficient encoding unit which encodes the frequency parameter. The en... | 07/05/2011 |
| 7974838 | System and method for pitch adjusting vocals A system and method to assist a singer or other user. An audio source is processed to extract the lead vocals from the audio signal. This vocal signal is fed to a pitch detection processor which estimates the pitch at each moment in time. A user singing into a micro... | 07/05/2011 |
| 7957958 | Pitch period equalizing apparatus and pitch period equalizing method, and speech coding apparatus, speech decoding apparatus, and speech coding method To provide a speech coding technology that realizes a low bit rate and can suppress distortion of reproduction speech as compared with a conventional technology. There are provided pitch detecting means 5 that detects a pitch frequency of an input spee... | 06/07/2011 |
| 7949520 | Adaptive filter pitch extraction An enhancement system extracts pitch from a processed speech signal. The system estimates the pitch of voiced speech by deriving filter coefficients of an adaptive filter and using the obtained filter coefficients to derive pitch. The pitch estimation may be enhance... | 05/24/2011 |
| 7933767 | Systems and methods for determining pitch lag for a current frame of information Methods, computer code products, devices, modules, systems, and encoders are disclosed which are configured to use an adaptive lag search window for determining a lag estimate for a current frame of information in an audio encoding system. The system can determine i... | 04/26/2011 |
| 7925500 | Pitch conversion method and device for converting a pitch of an input signal into a desired pitch In a pitch conversion method and device which can reduce data throughput while suppressing a degradation of sound quality due to a pitch conversion as much as possible, an input signal pitch pattern per predetermined processing unit and a target pitch pattern are in... | 04/12/2011 |
| 7912709 | Method and apparatus for estimating harmonic information, spectral envelope information, and degree of voicing of speech signal A degree of voicing is extracted using the characteristic of harmonic peaks existing in a constant period by converting an input speech or audio signal to a speech signal of the frequency domain, selecting the greatest peak in a first pitch period of the converted s... | 03/22/2011 |
| 7912708 | Method for controlling duration in speech synthesis The present invention relates to a method of synthesizing of a speech signal, comprising: —assigning of a first identifier to a first class of intervals of an original speech signal and assigning of a second identifier to a second class of intervals of the origina... | 03/22/2011 |
| 7885808 | Pitch-estimation method and system, and pitch-estimation program A pitch-estimation method, a pitch-estimation system, and a pitch-estimation program are provided, which estimate a weight of a probability density function of a fundamental frequency and relative amplitude of a harmonic component through fewer computations than eve... | 02/08/2011 |
| 7869990 | Pitch prediction for use by a speech decoder to conceal packet loss There is provided a pitch lag predictor for use by a speech decoder to generate a predicted pitch lag parameter. The pitch lag predictor comprises a summation calculator configured to generate a first summation based on a plurality of previous pitch lag parameters, ... | 01/11/2011 |
| 7860708 | Apparatus and method for extracting pitch information from speech signal An apparatus and method for extracting pitch information from a speech signal. The apparatus includes a pilot pitch detector for extracting predicted pitch information from a frame of an input speech signal, a pitch candidate value selector for selecting one or more... | 12/28/2010 |
| 7853447 | Method for varying speech speed A method for varying speech speed is provided. The method includes the following steps: receive an original speech signal; calculate a pitch period of the original speech signal; define search ranges according to the pitch period; find a maximum within each of the s... | 12/14/2010 |
| 7822600 | Method and apparatus for extracting pitch information from audio signal using morphology A function of improving accuracy of the extraction of pitch information in an audio signal including voice and sound signals is implemented. To do this, a morphological operation is used. In detail, an input audio signal is converted to an audio signal in a frequenc... | 10/26/2010 |
| 7801725 | Method for speech quality degradation estimation and method for degradation measures calculation and apparatuses thereof A method for speech quality degradation estimation, a method for degradation measures calculation, and the apparatuses thereof are provided. The first method above estimates the speech quality of a speech signal that is modified by a pitch-synchronous prosody modifi... | 09/21/2010 |
| 7788091 | Methods, devices and systems for improved pitch enhancement and autocorrelation in voice codecs An electronic circuit includes a storage circuit and a microprocessor operable together with the storage circuit as a speech coder. The speech coder has a backward pitch enhancement in frames or subframes having a length and at least one main pulse and at least one ... | 08/31/2010 |
| 7778824 | Device and method for frame lost concealment A device and a method for frame lost concealment are disclosed. A pitch period of a current lost frame is obtained on the basis of a pitch period of the last good frame before the current lost frame. An excitation signal of the current lost frame is recovered on the... | 08/17/2010 |
| 7752037 | Pitch extraction methods and systems for speech coding using sub-multiple time lag extraction A method of determining a pitch period of an audio signal using a correlation-based signal derived from the audio signal. The correlation-based signal includes known peaks each corresponding to a respective one of known time lags. The known peaks includes a global m... | 07/06/2010 |
| 7752038 | Pitch lag estimation Autocorrelation values are determined as a basis for an estimation of a pitch lag in a segment of an audio signal. A first considered delay range for the autocorrelation computations is divided into a first set of sections, and first autocorrelation values are deter... | 07/06/2010 |
| 7734463 | System and method for automated voice inflection for numbers The present invention is directed to systems and methods in which a speaker records strings of numbers in different string lengths. Advantage is taken of the fact that speakers typically break numbers into group sizes of two, three, or four. Thus, by way of example,... | 06/08/2010 |
| 7720677 | Time warped modified transform coding of audio signals A spectral representation of an audio signal having consecutive audio frames can be derived more efficiently, when a common time warp is estimated for any two neighboring frames, such that a following block transform can additionally use the warp information. Thus, ... | 05/18/2010 |
| 7693710 | Method and device for efficient frame erasure concealment in linear predictive based speech codecs The present invention relates to a method and device for improving concealment of frame erasure caused by frames of an encoded sound signal erased during transmission from an encoder (106) to a decoder (110), and for accelerating recovery of the decode... | 04/06/2010 |
| 7676361 | Apparatus, method and program for voice signal interpolation A voice signal interpolation apparatus is provided which can restore original human voices from human voices in a compressed state while maintaining a high sound quality. When a voice signal representative of a voice to be interpolated is acquired by a voice data in... | 03/09/2010 |
| 7672837 | Method and device for adaptive bandwidth pitch search in coding wideband signals A pitch search method and device for digitally encoding a wideband signal, in particular but not exclusively a speech signal, in view of transmitting, or storing, and synthesizing this wideband sound signal. The new method and device which achieve efficient modeling... | 03/02/2010 |
| 7672836 | Method and apparatus for estimating pitch of signal A pitch estimating method and apparatus in which mixture Gaussian distributions based on candidate pitches having high period estimating values are generated, a mixture Gaussian distribution having a high likelihood is selected and dynamic programming is executed so... | 03/02/2010 |
| 7664634 | System and method for voice user interface navigation A Voice User Interface (VUI) or Interactive Voice Response (IVR) system utilizes three levels of navigation (e.g. Main Menu, Services, and Helper Commands) in presenting information units arranged in sets. The units are “spoken” by a system in a group to a human... | 02/16/2010 |
| 7650280 | Voice packet loss concealment device, voice packet loss concealment method, receiving terminal, and voice communication system In a voice packet communication system, a voice packet loss concealment device compensates for the deterioration of voice quality due to voice packet loss. In the device, a detecting section detects a loss of a voice packet and outputting information; an estimating ... | 01/19/2010 |
| 7643988 | Method for analyzing fundamental frequency information and voice conversion method and system implementing said analysis method A method for analyzing fundamental frequency information contained in voice samples includes at least one analysis step (2) for the voice samples which are grouped together in frames in order to obtain information relating to the spectrum and information rela... | 01/05/2010 |
| 7630883 | Apparatus and method for creating pitch wave signals and apparatus and method compressing, expanding and synthesizing speech signals using these pitch wave signals A pitch wave signal creation method as a preliminary process for efficiently coding a speech wave signal having a fluctuated pitch period is provided. A speech signal compressing/expanding apparatus and a speech signal synthesizing apparatus using the method, and a ... | 12/08/2009 |
| 7606701 | Method and apparatus for determining emotional arousal by speech analysis An apparatus for determining emotional arousal of a subject by speech analysis, and an associated method. In the method, a speech sample is obtained, the speech sample is pre-processed into silent and active speech segments and the active speech segments are divided... | 10/20/2009 |
| 7603271 | Speech coding apparatus with perceptual weighting and method therefor A speech coding apparatus including a perceptual linear prediction (plp) analysis buffer configured to output a pitch period with respect to an original input speech signal and to analyze the input speech signal using a plp process to output a plp coefficient, an ex... | 10/13/2009 |
