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7509255 |
Apparatuses for adaptively controlling processing of speech signal and adaptively communicating speech in accordance with conditions of transmitting apparatus side and radio wave and methods thereof
An apparatus for processing a speech signal includes a receiver, a speech signal decoder, a speech rate conversion information detector, and a speech rate converting processor. The receiver...
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7415392 |
System for separating multiple sound sources from monophonic input with non-negative matrix factor deconvolution
A method and system separates components in individual signals, such as time series data streams. A single sensor acquires concurrently multiple individual signals. Each individual signal is...
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7395078 |
Voice over short message service
A method of sending a voice message via a mobile communication device, said method involving: receiving an utterance from a user of the mobile communication device; generating a non-text...
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7386695 |
Storage system with multiple copy targeting
A storage controller, cooperable with host computer apparatus, and a plurality of controlled storage apparatus, comprises a host write component operable to write a data object to a source data...
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7360048 |
Storage system with multiple copy targeting and disk failure protection
A method and apparatus is disclosed in which a storage controller cooperable with a host and a plurality of controlled storage is provided to localize an impact of a failure to a target disk in an...
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7343284 |
Method and system for speech processing for enhancement and detection
A method for discriminating noise from signal in a noise-contaminated signal involves decomposing a frame of samples of the signal into decorrelated components, and using a difference between...
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7266781 |
Method and apparatus for generating a graphical display report
A method and apparatus for generating a graphical display report. The method includes representing a plurality of events as one or more icons; and positioning the icons inside two or more...
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7205910 |
Signal encoding apparatus and signal encoding method, and signal decoding apparatus and signal decoding method
A signal encoding apparatus ( 10 ) limits an inputted time series signal to a low frequency band signal having a certain cut-off frequency or less to include the low frequency band signal into code...
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7062430 |
Designing boundary filters for a biorthogonal filter bank
A signal processing device includes a biorthogonal filter bank that processes a finite length signal including a left boundary and a right boundary. The biorthogonal filter bank includes an...
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7062445 |
Quantization loop with heuristic approach
A quantizer finds a quantization threshold using a quantization loop with a heuristic approach. Following the heuristic approach reduces the number of iterations in the quantization loop required...
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7050980 |
System and method for compressed domain beat detection in audio bitstreams
A system and method for detecting beats in a compressed audio domain is disclosed where a beat detector functions as part of an error concealment system in an audio decoding section used in audio...
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7006787 |
Mobile to mobile digital wireless connection having enhanced voice quality
This invention is directed toward improving the subjective voice quality of a mobile to mobile phone call having tandem vocoder processing by modifying the spectrum of the voice signal before it is...
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6883015 |
Apparatus and method for providing server state and attribute management for multiple-threaded voice enabled web applications
An application server generates and maintains a server-side data record, also referred to as a “brownie”, that includes application state information and user attribute information for multiple...
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6873955 |
Method and apparatus for recording/reproducing or producing a waveform using time position information
Partial waveform data representative of a waveform shape variation are extracted from supplied waveform data, and the extracted partial waveform data are stored along with time position information...
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6826528 |
Weighted frequency-channel background noise suppressor
A method for implementing a noise suppressor in a speech recognition system comprises a filter bank for separating source speech data into discrete frequency sub-bands to generate filtered channel...
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6801666 |
Device and method for transforming a digital signal
A trellis filtering of a digital signal is disclosed. A method is provided of analysis filtering of an original digital signal including original samples representing physical quantities. Original...
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6714907 |
Codebook structure and search for speech coding
A speech compression system with a special fixed codebook structure and a new search routine is proposed for speech coding. The system is capable of encoding a speech signal into a bitstream for...
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6681204 |
Apparatus and method for encoding a signal as well as apparatus and method for decoding a signal
An apparatus and a method for encoding an input signal on the time base through orthogonal transform involves removing the correlation of signal waveform on the basis of the parameters obtained by...
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6636830 |
System and method for noise reduction using bi-orthogonal modified discrete cosine transform
The invention provides a perceptual audio signal compression system and method. One aspect of the invention described herein includes transforming the signal into a plurality of bi-orthogonal...
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6604069 |
Signals having quantized values and variable length codes
Efficiently encoded signals wherein the compression ration can be high without a corresponding degradation of signal quality. The range of values of subband-based signal components for quantization...
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6587816 |
Fast frequency-domain pitch estimation
A method for estimating a pitch frequency of an audio signal includes computing a first transform of the signal to a frequency domain over a first time interval, and computing a second transform of...
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6539356 |
Signal encoding and decoding method with electronic watermarking
An encoder which encodes a voice in accordance with LD-CELP (Low-Delay Code Excited Linear Prediction) of the ITU-T Recommendation G.728. When a vibration wave is encoded by vector quantization,...
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6519558 |
Audio signal pitch adjustment apparatus and method
A signal processing method and apparatus is disclosed, which is capable of reproducing a coded audio signal by decoding it while shifting its pitch, and reproducing, from an original sound, a sound...
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6430529 |
System and method for efficient time-domain aliasing cancellation
The invention comprises an efficient system and method for performing the modified discrete cosine transform (MDCT) in support of time-domain aliasing cancellation (TDAC) perceptive encoding...
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6330531 |
Comb codebook structure
A speech encoding comb codebook structure for providing good quality reproduced low bit-rate speech signals in a speech encoding system. The codebook structure requires minimal training, if any,...
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6304847 |
Method of implementing an inverse modified discrete cosine transform (IMDCT) in a dial-mode audio decoder
A method of implementing a dual-mode audio decoder and filter is provided. The inverse modified discrete cosine transform (IMDCT) method and circuit for a dual-mode audio decoder perform the IMDCT...
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6253165 |
System and method for modeling probability distribution functions of transform coefficients of encoded signal
The coder/decoder (codec) system of the present invention includes a coder and a decoder. The coder includes a multi-resolution transform processor, such as a modulated lapped transform (MLT)...
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6240380 |
System and method for partially whitening and quantizing weighting functions of audio signals
The coder/decoder (codec) system of the present invention includes a coder and a decoder. The coder includes a multi-resolution transform processor, such as a modulated lapped transform (MLT)...
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6230122 |
Speech detection with noise suppression based on principal components analysis
A method for effectively suppressing background noise in a speech detection system comprises a filter bank for separating source speech data into discrete frequency sub-bands to generate filtered...
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6209015 |
Method of implementing dual-mode audio decorder and filter therefor
A method of implementing a dual-mode audio decoder and filter is provided. The inverse modified discrete cosine transform (IMDCT) method and circuit for a dual-mode audio decoder perform the IMDCT...
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6208962 |
Signal coding system
For voice and musical signal, a signal coding system which can obtain good sound quality even at a low bit rate is provided. The signal coding system predicts an input signal in a predicting...
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6199041 |
System and method for sampling rate transformation in speech recognition
A method and system for transforming a sampling rate in speech recognition systems, in accordance with the present invention, includes the steps of providing cepstral based data including...
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6167093 |
Method and apparatus for encoding the information, method and apparatus for decoding the information and method for information transmission
A method and apparatus for encoding input digital data by high-efficiency encoding, a method for transmitting the encoded information and a method and apparatus for reproducing and decoding the...
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6163765 |
Subband normalization, transformation, and voiceness to recognize phonemes for text messaging in a radio communication system
A radio communication system includes a voice recognition system (221) for converting (400) a caller's voice message to a textual speech message. The textual speech message is then transmitted to...
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6141637 |
Speech signal encoding and decoding system, speech encoding apparatus, speech decoding apparatus, speech encoding and decoding method, and storage medium storing a program for carrying out the method
A speech encoding and decoding system comprises a speech coding apparatus and a speech decoding apparatus. The speech encoding apparatus orthogonally transforms an input speech signal represented...
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6115689 |
Scalable audio coder and decoder
The coder/decoder (codec) system of the present invention includes a coder and a decoder. The coder includes a multi-resolution transform processor, such as a modulated lapped transform (MLT)...
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6029136 |
Band dividing/synthesizing filter with reduced memory requirements
A coding process having a band dividing filter and a decoding process having a subband synthesizing filter are arranged so that the operating accuracy is enhanced only in a specific subband, for...
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6028889 |
Pipelined fast hadamard transform
A pipelined Fast Hadamard Transform ("FHT") architecture is disclosed that comprises log 2 N identical pipeline stages, which are ideally suited for implementation in application-specific...
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5991715 |
Perceptual audio signal subband coding using value classes for successive scale factor differences
A method of transmitting digitized block coded audio signals includes forming scale factors of the digitized audio signals. The n(k-1) differences are formed from k successively in-time scale...
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5970461 |
System, method and computer readable medium of efficiently decoding an AC-3 bitstream by precalculating computationally expensive values to be used in the decoding algorithm
A method and system for providing an inverse transform for an audio compression decoding algorithm in software precalculates a plurality of identified values; each of which is computationally...
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5946038 |
Method and arrangement for coding and decoding signals
A transform coder wherein different segments of signal samples to be transmitted to a receiver are encoded using different coding transforms. In order to avoid problems encountered with signal...
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5924064 |
Variable length coding using a plurality of region bit allocation patterns
Samples of an audio signal are converted into grouped frames of transformed transform coefficients, each frame having a plurality of regions (subbands). The power in each region is determined,...
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5913186 |
Discrete one dimensional signal processing apparatus and method using energy spreading coding
PONS comprises a transform coder and decoder for discrete time electrical signals, in particular acoustic signals. The PONS coder utilizes an integer coefficient transform coder which is not...
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5901234 |
Gain control method and gain control apparatus for digital audio signals
A signal encoding method and apparatus for encoding an acoustic signal, a recording medium having the encoded signals, a method for transmitting the encoded signals, and a signal decoding apparatus...
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5890107 |
Sound signal processing circuit which independently calculates left and right mask levels of sub-band sound samples
A sound signal processing circuit which independently calculates left and right mask levels of sub-band sound samples. A fast Fourier transform circuit performs a fast Fourier transform on input...
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5890111 |
Enhancement of esophageal speech by injection noise rejection
Injection noise and silence are detected in an input speech signal and an external amplifier is switched on or off based on the detected injection noise or silence. The input speech signal is...
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5832424 |
Speech or audio encoding of variable frequency tonal components and non-tonal components
Frequency components are broken into a first signal made up of a plurality of tonal components and a second signal made up of other components. The number of the frequency components making up the...
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5819211 |
Adaptive transform acoustic coding circuit formed in a single application specific integrated circuit of a mini disk system
The present invention relates to an adaptive transform acoustic coding circuit capable of ensuring the reliability of decoded audio data. The adaptive transform acoustic coding circuit is employed...
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5799270 |
Speech coding system which uses MPEG/audio layer III encoding algorithm
A speech coding system is shown, which comprises a linear transform unit 50 for executing linear transform on an input signal Si with a predetermined block length Sb and an FFT unit 10, 30 for...
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5799131 |
Speech coding and decoding system
A speech coding and decoding system, where the system is operated under a known code-excited linear prediction (CELP) coding method. The CELP coding is achieved by selecting an optimum pitch...
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