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| Number | Title | Issue Date |
| 8185383 | Methods and apparatus for adapting speech coders to improve cochlear implant performance Cochlear implant performance is improved by extracting pitch information and encoding such pitch information into the processor of a cochlear implant. One embodiment of the invention is to explicitly extract the pitch and deliver it to the cochlear implant by co-var... | 05/22/2012 |
| RE43406 | Method and device for speech analysis A device and a method for speech analysis are provided, comprising measuring fundamental notes of a speech sequence to be analysed and identifying frequency intervals between at least some of said fundamental notes. An assessment is then made as to the frequency at ... | 05/22/2012 |
| 8185384 | Signal pitch period estimation A method and apparatus for estimating the pitch period of a signal. The method includes identifying a first candidate pitch period by performing a search only over a first range of potential pitch periods. The method further includes determining a second candidate p... | 05/22/2012 |
| 8175866 | Methods and apparatus for post-processing of speech signals A method for post-processing of speech signals includes using a pitch correction filter, a pitch weight parameter adjustor, and a first pitch enhancement filter to process the input signal into a first output signal; summing both the input signal and the first outpu... | 05/08/2012 |
| 8170870 | Apparatus for and program of processing audio signal In an audio signal processing apparatus, a generation section generates an audio signal representing a voice. A distribution section distributes the audio signal generated by the generation section to a first channel and a second channel, respectively. A delay secti... | 05/01/2012 |
| 8165872 | Method and system for improving speech quality A method and system for improving speech quality may include estimating at least one component of a distorted portion of a speech signal from at least one component of an undistorted portion of the speech signal and reinforcing the component of the distorted portion... | 04/24/2012 |
| 8165873 | Speech analysis apparatus, speech analysis method and computer program A speech analysis apparatus analyzing prosodic characteristics of speech information and outputting a prosodic discrimination result includes an input unit inputting speech information, an acoustic analysis unit calculating relative pitch variation and a discriminat... | 04/24/2012 |
| 8150682 | 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... | 04/03/2012 |
| 8145477 | Systems, methods, and apparatus for computationally efficient, iterative alignment of speech waveforms Systems, methods, and apparatus described include waveform alignment operations in which a single set of evaluated cosines and sines is used to calculate cross-correlations of two periodic waveforms at two different phase shifts. ... | 03/27/2012 |
| 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 |
| 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 |
| 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 |
| 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 |
