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7617096 Robust quantization and inverse quantization using illegal space  
A quantizer for quantization of a vector comprises a codevector generator that generates a set of candidate codevectors and a memory for storing an illegal space definition representing illegal...
7613605 Audio signal encoding apparatus and method  
An audio signal encoding apparatus includes a frame dividing unit ( 1 ), an auditory psychological arithmetic unit ( 2 ), a filter bank unit ( 3 ), a scale factor calculation unit ( 4 ) which...
7590527 Speech coder using an orthogonal search and an orthogonal search method  
A code excited linear prediction speech decoder includes an adaptive codebook configured to generate an adaptive code vector. The decoder also includes a random codebook configured to generate a...
7587314 Single-codebook vector quantization for multiple-rate applications  
This invention relates to a method, a device and a software application product for N-level quantization of vectors, wherein N is selectable prior to said quantization from a set of at least two...
7584095 REW parametric vector quantization and dual-predictive SEW vector quantization for waveform interpolative coding  
An enhanced analysis-by-synthesis waveform interpolative speech coder able to operate at 2.8 kbps. Novel features include dual-predictive analysis-by-synthesis quantization of the slowly-evolving...
7577567 Multimode speech coding apparatus and decoding apparatus  
Square sum calculator 603 calculates a square sum of evolution in smoothed quantized LSP parameter for each order. A first dynamic parameter is thereby obtained. Square sum calculator 605 ...
7546239 Speech coder and speech decoder  
A dispersed vector generator used for a speech encoder or a speech decoder includes a pulse vector provider that provides a pulse vector having a signed unit pulse on one element of a vector axis....
7542898 Pitch cycle search range setting apparatus and pitch cycle search apparatus  
An apparatus sets a pitch cycle search object in pitch cycle search processing for searching for a pitch cycle included in a linear predictive residual on a per subframe basis. A pitch cycle...
7519533 Fixed codebook searching apparatus and fixed codebook searching method  
A fixed codebook searching apparatus which slightly suppresses an increase in the operation amount, even if the filter applied to the excitation pulse has the characteristic that it cannot be...
7509254 Encoding device and decoding device  
An encoding device ( 200 ) includes an MDCT unit ( 202 ) that transforms an input signal in a time domain into a frequency spectrum including a lower frequency spectrum, a BWE encoding unit ( 204 )...
7493255 Generating LSF vectors  
To alleviate problems of signal aliasing and to reduce complexity, Linear Predictive Coefficients (LPCS) are calculated from samples of audio signals and Line Spectral Frequency (LSF) vectors are...
7464030 Vector search method  
Each of the M basic vectors in a noise code book 260 is multiplied by a factor ±1 in a sign adder 270 and combined in an adder 280 to create 2 M noise signed vectors. The characteristic of...
7454329 Method and apparatus for classifying signals, method and apparatus for generating descriptors and method and apparatus for retrieving signals  
The input signal can be quickly and accurately classified and a descriptor can be generated according to the result of classification. Then, the input signal can be retrieved on the basis of the...
7451091 Method for determining time borders and frequency resolutions for spectral envelope coding  
A frame type for a current SBR frame is determined according to a type of end border of a previous frame, as well as presence of a transient in the current SBR frame. A start border is determined...
7421376 Comparison of data signals using characteristic electronic thumbprints  
A characteristic thumbprint is extracted from a data signal, the thumbprint based on statistics relating to the data signal. The data signal can be compared indirectly by matching this thumbprint...
7412381 Method and apparatus for diversity control in multiple description voice communication  
A method and apparatus for performing multiple descriptive source coding in which a plurality of homogeneous encoders are advantageously employed in combination with a corresponding plurality of...
7406410 Encoding and decoding method and apparatus using rising-transition detection and notification  
A decoding apparatus is provided. The decoding apparatus has a first decoding part for decoding a code word obtained by encoding an input signal using a Code-Excited Linear Prediction encoding...
7392179 LPC vector quantization apparatus  
The present invention carries out pre-selection on many LPC codevectors stored in an LSF codebook 101 using a weighted Euclidean distortion as a measure and carries out a full-code selection on...
7391918 Fixed, variable and adaptive bit rate data source encoding (compression) method  
According to the invention, quantization encoding is conducted using the probability density function of the source, enabling fixed, variable and adaptive rate encoding. To achieve adaptive...
7389227 High-speed search method for LSP quantizer using split VQ and fixed codebook of G.729 speech encoder  
A high-speed search method in a speech encoder using an order character of LSP (Line Spectrum Pair) parameters in an LSP parameter quantizer using SVQ (Split Vector Quantization) used in a...
7383241 System and method for estimating performance of a classifier  
A method for estimating the performance of a statistical classifier. The method includes inputting a first set of business data in a first format from a real business process and storing the first...
7343292 Audio encoder utilizing bandwidth-limiting processing based on code amount characteristics  
A mapping transform unit subjects input audio signals to a mapping transform and generates frequency region signals that take frequency as a variable; a code amount designation unit supplies a...
7337110 Structured VSELP codebook for low complexity search  
A codebook excited linear prediction coding system providing improved digital speech coding for high quality speech at low bit rates with side-by-side codebooks for segments of the modeled input...
7310598 Energy based split vector quantizer employing signal representation in multiple transform domains  
The invention relates to representation of one and multidimensional signal vectors in multiple nonorthogonal domains and design of Vector Quantizers that can be chosen among these representations....
7310597 System and method for enhancing bit error tolerance over a bandwidth limited channel  
A system and method reduces the effects of the bit-error induced distortion of decoded voice transmission by assigning vectors that are close or similar in Euclidean distance to respective indices...
7310596 Method and system for embedding and extracting data from encoded voice code  
When a voice encoding apparatus embeds any data in encoded voice code, the apparatus determines whether data embedding condition is satisfied using a first element code from among element codes...
7298305 Delta sigma modulator analog-to-digital converters with quantizer output prediction and comparator reduction  
The quantizers of delta sigma modulators in the signal processing systems described herein use a reduced set of comparators for quantization by predetermining and maintaining a maximum per cycle...
7295974 Encoding in speech compression  
Linear predictive system with classification of LP residual Fourier coefficients into two or more overlapping classes, and each class has its own vector quantization codebook(s). The use of strong...
7295971 Accounting for non-monotonicity of quality as a function of quantization in quality and rate control for digital audio  
An audio encoder regulates quality and bitrate with a control strategy. The strategy includes several features. First, an encoder regulates quantization using quality, minimum bit count, and...
7280959 Indexing pulse positions and signs in algebraic codebooks for coding of wideband signals  
The indexing method comprises forming a set of tracks of pulse positions, restraining the positions of the non-zero-amplitude pulses of the combinations of the codebook in accordance with the set...
7272557 Method and apparatus for quantizing model parameters  
A method of quantizing a model parameter includes applying the model parameter to a non-linear scaling function to produce a scaled model parameter and quantizing the scaled model parameter to form...
7269555 Unsupervised incremental adaptation using maximum likelihood spectral transformation  
In a speech recognition system, a method of transforming speech feature vectors associated with speech data provided to the speech recognition system includes the steps of receiving likelihood of...
7263481 Method and apparatus for improved quality voice transcoding  
A method and apparatus for a voice transcoder that converts a bitstream representing frames of data encoded according to a first voice compression standard to a bitstream representing frames of...
7249015 Classification of audio as speech or non-speech using multiple threshold values  
A portion of an audio signal is separated into multiple frames from which one or more different features are extracted. These different features are used, in combination with a set of rules, to...
7209878 Noise feedback coding method and system for efficiently searching vector quantization codevectors used for coding a speech signal  
A system for performing a computationally efficient method of searching through N Vector Quantization (VQ) codevectors for a preferred one of the N VQ codevectors predicts a speech signal to derive...
7206740 Efficient excitation quantization in noise feedback coding with general noise shaping  
In a Noise Feedback Coding (NFC) system operable in a ZERO-STATE condition and a ZERO-INPUT condition, the NFC system including at least one filter having a filter memory, a method of updating the...
7206352 ATSC digital television system  
This disclosure describes a flexible digital transmission system that improves upon the ATSC A/53 HDTV signal transmission standard. The system includes a digital television signal transmitter for...
7197093 Digital signal processing apparatus and digital signal processing method  
A digital signal of which input data has been segmented as block each having a predetermined data amount and highly efficiently encoded along with an adjacent block is decoded, edited, and then...
7194407 Audio coding method and apparatus  
A method of coding an audio signal comprises receiving an audio signal x to be coded and transforming the received signal from the time to the frequency domain. A quantised audio signal {tilde over...
7139702 Encoding device and decoding device  
An encoding device ( 200 ) includes an MDCT unit ( 202 ) that transforms an input signal in a time domain into a frequency spectrum including a lower frequency spectrum, a BWE encoding unit ( 204 )...
7110942 Efficient excitation quantization in a noise feedback coding system using correlation techniques  
A method of performing an excitation Vector Quantization (VQ) in a Noise Feedback Coding environment involves reorganizing a calculation of an energy of an error vector for each of a plurality of...
7096181 Method for searching codebook  
A method for searching a codebook which predicts a residual element of an input voice signal includes combining each track of the input signal, forming track units including at least two tracks,...
7085714 Receiver for encoding speech signal using a weighted synthesis filter  
A method for processing speech in a spread spectrum communication system uses CELP speech encoded signals. A speech input receives samples of a speech signal and a codebook analysis block for...
7085712 Method and apparatus for subsampling phase spectrum information  
Method and apparatus for subsampling phase spectrum information by analyzing and reconstructing a prototype of a frame. The prototype is analyzed by correlating phase parameters generated from the...
7072830 Audio coder  
An audio coder that improves audio quality by reducing a quantization error. When a code corresponding to a sampled value of an audio signal is determined, a candidate code storage section stores...
7072829 Speech recognition from concurrent visual and audible inputs  
With respect to each of codes corresponding to code vectors in a code book stored in a code book storage section, an expectation degree storage section stores an expectation degree at which...
7065338 Method, device and program for coding and decoding acoustic parameter, and method, device and program for coding and decoding sound  
In coding and decoding an acoustic parameter, a weighted vector is generated by multiplying a code vector output in a past frame and a code vector selected in a present frame by weighting factors...
7062431 Speech analyzing stage and method for analyzing a speech signal  
A speech analyzing stage ( 12 ) and a method for analyzing a speech signal is described. The speech analyzing stage ( 12 ) is part of an automatic speech recognition system ( 10 ) and is adapted...
7047189 Sound source separation using convolutional mixing and a priori sound source knowledge  
Sound source separation, without permutation, using convolutional mixing independent component analysis based on a priori knowledge of the target sound source is disclosed. The target sound source...
7013270 Determining linear predictive coding filter parameters for encoding a voice signal  
The present invention is a method for determining linear predictive coding filter parameters for encoding a voice signal. The method includes sampling a voice signal, grouping the samples into a...
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