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7613612 Voice synthesizer of multi sounds  
In a voice synthesizer, an envelope acquisition portion obtains a spectral envelope of a reference frequency spectrum of a given voice. A spectrum acquisition portion obtains a collective frequency...
7546237 Bandwidth extension of narrowband speech  
A system extends the bandwidth of a narrowband speech signal into a wideband spectrum. The system includes a high-band generator that generates a high frequency spectrum based on a narrowband...
7529672 Speech synthesis using concatenation of speech waveforms  
A method of synthesizing a speech signal by providing a first speech unit signal having an end interval and a second speech unit signal having a front interval, wherein at least some of the periods...
7403894 Annotating programs for automatic summary generations  
Audio/video programming content is made available to a receiver from a content provider, and meta data is made available to the receiver from a meta data provider. The meta data corresponds to the...
7305068 Telephone communication with silent response feature  
A telephone call may be received or made by the user of telephony-enabled apparatus in circumstances, such as during a meeting, where spoken responses by the user to what the other party to the...
7283961 High-quality speech synthesis device and method by classification and prediction processing of synthesized sound  
There is disclosed a speech processing device in which prediction taps for finding prediction values of the speech of high sound quality are extracted from the synthesized sound obtained on...
7272555 Fine granularity scalability speech coding for multi-pulses CELP-based algorithm  
A method for speech processing in a code excitation linear prediction (CELP) based speech system having a plurality of modes including at least a first mode and a consecutive second mode. The...
7269559 Speech decoding apparatus and method using prediction and class taps  
The present invention relates to a data processing apparatus capable of obtaining high-quality sound, etc. A tap generation section 121 generate a prediction tap from synthesized speech data for...
7257535 Parametric speech codec for representing synthetic speech in the presence of background noise  
A system and method are provided for processing audio and speech signals using a pitch and voicing dependent spectral estimation algorithm (voicing algorithm) to accurately represent voiced speech,...
7092885 Sound encoding method and sound decoding method, and sound encoding device and sound decoding device  
A high quality speech is reproduced with a small data amount in speech coding and decoding for performing compression coding and decoding of a speech signal to a digital signal. In speech coding...
7003454 Method and system for line spectral frequency vector quantization in speech codec  
A method and system for quantizing LSF vectors in a speech coder, wherein predicted LSF values based on previously decoded output values are used to estimate spectral distortion, along with the...
6873954 Method and apparatus in a telecommunications system  
Audio artifacts due to overrun or underrun in a playout buffer caused by the sampling rates at a sending and receiving side not being at the same rate are reduced. An LPC-residual is modified on a...
6859775 Joint optimization of excitation and model parameters in parametric speech coders  
A speech synthesis system is provided that optimizes a synthesis filter. Optimization is achieved by minimizing a synthesis error between the original speech sample and a synthesized speech sample....
6826527 Concealment of frame erasures and method  
A decoder for code excited LP encoded frames with both adaptive and fixed codebooks; erased frame concealment uses muted repetitive excitation, threshold-adapted bandwidth expanded repetitive...
6813604 Methods and apparatus for speaker specific durational adaptation  
A text to speech system modeling durational characteristics of a target speaker is addressed herein. A body of target speaker training text is selected having maximum possible information about...
6804649 Expressivity of voice synthesis by emphasizing source signal features  
Voice synthesis with improved expressivity is obtained in a voice synthesiser of source-filter type by making use of a library of source sound categories in the source module. Each source sound...
6785646 Method and system for performing a codebook search used in waveform coding  
The present invention provides a method and system to improve the cookbook search algorithm used in a coding/decoding device or routine. The codebook search algorithm is performed by a processing...
6754630 Synthesis of speech from pitch prototype waveforms by time-synchronous waveform interpolation  
In a method of synthesizing voiced speech from pitch prototype waveforms by time-synchronous waveform interpolation (TSWI), one or more pitch prototypes is extracted from a speech signal or a...
6708154 Method and apparatus for using formant models in resonance control for speech systems  
A model is provided for formants found in human speech. Under one aspect of the invention, the model is used to synthesize speech. Under this aspect of the invention, the formant model is used to...
6691083 Wideband speech synthesis from a narrowband speech signal  
Wideband speech is synthesized from a bandlimited speech signal, for example from speech which has been transmitted via the public switched telephone network. Due to the nature of the vocal tract,...
6675144 Audio coding systems and methods  
An audio signal is decomposed into lower and upper sub-band and at least the noise component of the sub-band is encoded. At the decoder the audio signal is synthesised by a decoding means which...
6594626 Voice encoding and voice decoding using an adaptive codebook and an algebraic codebook  
Disclosed is a voice encoding method having a synthesis filter implemented using linear prediction coefficients obtained by dividing an input signal into frames each of a fixed length, and...
6509850 Method and system for sampling rate conversion in digital audio applications  
A method for upsampling a digital audio signal is described. The method includes receiving a first digital audio signal including samples and having a first sampling rate. The method also includes...
6336092 Targeted vocal transformation  
The invention is a method for transforming a source individual's voice so as to adopt the characteristics of a target individual's voice. The excitation signal component of the target individual's...
6219637 Speech coding/decoding using phase spectrum corresponding to a transfer function having at least one pole outside the unit circle  
A decoder for speech signals receives magnitude spectral information for synthesis of a time-varying signal. From the magnitude spectral information, phase spectrum information is computed...
6208969 Electronic data processing apparatus and method for sound synthesis using transfer functions of sound samples  
A method and an electronic data processing apparatus for wave synthesis that retains the true qualities of naturally occurring sounds, such as those of musical instruments, speech, or other sounds....
6202048 Phonemic unit dictionary based on shifted portions of source codebook vectors, for text-to-speech synthesis  
A speech synthesis apparatus synthesize a speech signal by filtering a speech source signal through a synthesis filter. A speech source signal codebook stores a plurality of speech source signals...
6185533 Generation and synthesis of prosody templates  
A method of separating high-level prosodic behavior from purely articulatory constraints so that timing information can be extracted from human speech is presented. The extracted timing information...
6161091 Speech recognition-synthesis based encoding/decoding method, and speech encoding/decoding system  
A speech recognition synthesis based encoding/decoding method recognizes phonetic segments, syllables, words or the like as character information from an input speech signal and detects pitch...
6125344 Pitch modification method by glottal closure interval extrapolation  
The present invention relates to an improved pitch modification method by glottal closure interval extrapolation. It is an object of the present invention to modify pitches of speech signals by the...
RE36721 Speech coding and decoding apparatus  
A speech signal is input to an excitation signal generating section, a prediction filter and a prediction parameter calculator. The prediction parameter calculator calculates a predetermined number...
6067519 Waveform speech synthesis  
6041298 Method for synthesizing a frame of a speech signal with a computed stochastic excitation part  
The invention describes one way of coding a speech signal without the elaborate searhing of a stochastic codebook. An "ideal" Regular Pulse Excitation (RPE) is used as the starting point for the...
6029133 Pitch synchronized sinusoidal synthesizer  
A pitch synchronous sinusoidal synthesizer for multi-band excitation vocoders will produce excitation signals necessary to artificially mimic speech from input data. The input data will contain the...
6029128 Speech synthesizer  
A post-processor 317 and method substantially for enhancing synthesised speech is disclosed. The post-processor 317 operates on a signal ex(n) derived from an excitation generator 211 typically...
6009395 Synthesizer and method using scaled excitation signal  
A synthesizer may synthesize speech by receiving an adaptive codebook excitation signal and an adaptive codebook gain. The adaptive codebook excitation signal may be scaled using the adaptive...
6006180 Method and apparatus for recognizing deformed speech  
An apparatus and method for recognizing deformed speech signals outputted from a microphone includes a module for comparing deformed signals with simulated deformed signals that are generated from...
5930755 Utilization of a recorded sound sample as a voice source in a speech synthesizer  
One or more prerecorded sounds are used as a voice source in a speech synthesizer to provide unique synthetic speech sounds. Recording one or more sound samples and then utilizing a speech...
5905970 Speech coding device for estimating an error of power envelopes of synthetic and input speech signals  
In a speech coding device for coding an input speech with an AbS (Analysis by Synthesis) system and one of a forward type and a backward type configuration, a vocal tract prediction coefficient...
5893061 Method of synthesizing a block of a speech signal in a celp-type coder  
A new scheme to generate the stochastic excitation for a CELP-type speech codec based upon a hybrid stochastic codebook search technique including use of regular pulse excitation codebooks is...
5893060 Method and device for eradicating instability due to periodic signals in analysis-by-synthesis speech codecs  
A method and device eradicate the occasional instability inherent in analysis-by-synthesis speech/audio codecs and caused in particular by channel errors during transmission of highly periodic...
5864797 Pitch-synchronous speech coding by applying multiple analysis to select and align a plurality of types of code vectors  
A speech coder using a pitch synchronous innovation code excited linear prediction (PSI-CELP) speech coding system. The speech coder is capable of representing a portion which is not sufficiently...
5809459 Method and apparatus for speech excitation waveform coding using multiple error waveforms  
A method and apparatus (100) for pitch-epoch-synchronous source-filter speech encoding by means of error component modeling methods (310) which capture fundamental orthogonal (uncorrelated) basis...
5797118 Learning vector quantization and a temporary memory such that the codebook contents are renewed when a first speaker returns  
An encoding/decoding system employing vector quantization realizes a high quality encoding and decoding with decreased quantizing errors, employing a small sized codebook which faithfully...
5794185 Method and apparatus for speech coding using ensemble statistics  
A speech coder (100) computes scalar statistics (180), ensemble statistics (190), spectral parameters (150), and a normalized excitation waveform (270) which describe a frame of speech samples. The...
5787388 Frame-count-dependent smoothing filter for reducing abrupt decoder background noise variation during speech pauses in VOX  
In a speech decoding apparatus, a conversion unit converts a received encoded signal into a parameter in units of frames. A memory repeatedly updates and stores the parameter representing a pause...
5778335 Method and apparatus for efficient multiband celp wideband speech and music coding and decoding  
A method of digitally compressing speech and music by use of multiple band ("multiband") fixed excitations stored in codebooks. The use of multiband fixed excitations, along with a coupling method...
5765128 Apparatus for synchronizing a voice coder and a voice decoder of a vector-coding type  
An apparatus synchronizes a voice coder and a voice decoder which are of the vector-coding type in order to prevent a false synchronization even when a signal having the same period as a string of...
5752223 Code-excited linear predictive coder and decoder with conversion filter for converting stochastic and impulsive excitation signals  
A code-excited linear predictive coder or decoder for a speech signal has an adaptive codebook, a stochastic codebook, and a pulse codebook. A constant excitation signal is obtained by choosing...
5745650 Speech synthesis apparatus and method for synthesizing speech from a character series comprising a text and pitch information  
A speech synthesis method and apparatus for synthesizing speech from a character series comprising a text and pitch information. The apparatus includes a parameter generator for generating power...
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