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7343287 |
Method and apparatus for scalable encoding and method and apparatus for scalable decoding
An apparatus for scalable encoding a spectrum of a signal including audio and/or video information, with the spectrum comprising binary spectral values, includes a means for generating a first...
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7340394 |
Using quality and bit count parameters 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...
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7318023 |
Method for detecting the quantization of spectra
The invention comprises the retrieval of a quantized spectrum of audio-data, which had been compressed conforming to psychoacoustic principles. This spectrum can be identified with the aid of...
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7318028 |
Method and apparatus for determining an estimate
For determining an estimate of a need for information units for encoding a signal, a measure for the distribution of the energy in the frequency band is taken into account in addition to the...
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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....
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7308402 |
Error resistant scalable audio coding partitioned for determining errors
A scalable audio codec processes, quantizes and encodes audio signals into an embedded audio bitstream of bit-planes each having a data unit. The data unit has a beginning refinement bits...
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7302386 |
Focused search method of fixed codebook and apparatus thereof
There are provided a search method of a fixed codebook, and more particularly, a focused search method and apparatus thereof, for being applied to a speech codec for Voice over Internet Protocol...
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7299172 |
Systems and methods for sound compression
Embodiments of the invention achieve increased compression of audio data in comparison to prior art ADPCM compression schemes using modest processing power and resources. For one embodiment, an...
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7295978 |
Systems and methods for using one-dimensional gaussian distributions to model speech
A system for recognizing speech receives an input speech vector and identifies a Gaussian distribution. The system determines an address from the input speech vector ( 610 ) and uses the address to...
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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...
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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...
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7277849 |
Efficiency improvements in scalable audio coding
An audio encoding method of coding audio signals into a layered data stream having a first layer and a second layer is presented. The second layer serves as an enhancement of the first layer. The...
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7275031 |
Apparatus and method for encoding an audio signal and apparatus and method for decoding an encoded audio signal
When encoding an audio signal, the audio signal is first encoded with the first encoder to obtain a first encoder output signal. This first encoder output signal is written into a bit stream. It is...
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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...
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7272556 |
Scalable and embedded codec for speech and audio signals
A system and method for processing of audio and speech signals is disclosed, which provide compatibility over a range of communication devices operating at different sampling frequencies and/or bit...
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7269554 |
Method, apparatus, and system for efficient rate control in audio encoding
According to one aspect of the invention, a method is provided in which audio samples representing an input audio signal are received. The input audio samples are transformed into a vector of...
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7269564 |
Method and apparatus to indicate an encoding status for digital content
A method of determining an encoding rate for digital content. According to the method, the a sample of the content data is encoded for a predetermined period of time. The encoding rate is...
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7260525 |
Filtering of control parameters 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...
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7257226 |
Information management method and information management apparatus
An information management method and an information management apparatus can minimize the confusion and the degradation of signal quality that can arise in terms of the compatibility of an...
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7254533 |
Method and apparatus for a thin CELP voice codec
An apparatus and method for encoding and decoding a voice signal. The apparatus includes an encoder configured to generate an output bitstream signal from an input voice signal. The output...
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7249014 |
Apparatus, methods and articles incorporating a fast algebraic codebook search technique
An efficient method for codebook search, employed in speech coding, uses an optimal pulse-position grouping and a split track arrangement, based on a likelihood estimator. Also disclosed are...
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7243061 |
Multistage inverse quantization having a plurality of frequency bands
With respect to audio signal coding and decoding apparatuses, there is provided a coding apparatus that enables a decoding apparatus to reproduce an audio signal even through it does not use all of...
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7240001 |
Quality improvement techniques in an audio encoder
An audio encoder implements multi-channel coding decision, band truncation, multi-channel rematrixing, and header reduction techniques to improve quality and coding efficiency. In the multi-channel...
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7233624 |
Method and system for all digital gain control
An analog/digital gain control device avoid some of the requirements associated with the nature of a closed-loop AGC circuits and which meets the remaining requirements without much difficulty uses...
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7228274 |
Recognition of identification patterns
The invention relates to a method and to a device for identifying markers in data blocks. The method is characterized in that a number of data blocks ( 201 a 201 n ) are received by a receiver (...
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7222069 |
Voice code conversion apparatus
Disclosed is a voice code conversation apparatus to which voice code obtained by a first voice encoding method is input for converting this voice code to voice code of a second voice encoding...
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7212973 |
Encoding method, encoding apparatus, decoding method, decoding apparatus and program
In a quantization step information encoding unit, an average value of the quantization step information is found in an approximate shape extraction unit ( 20 ), first of all, from one set of a...
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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...
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7155383 |
Quantization matrices for jointly coded channels of audio
Quantization matrices facilitate digital audio encoding and decoding. An audio encoder generates and compresses quantization matrices; an audio decoder decompresses and applies the quantization...
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7149683 |
Method and device for robust predictive vector quantization of linear prediction parameters in variable bit rate speech coding
The present invention relates to a method and device for quantizing linear prediction parameters in variable bit-rate sound signal coding, in which an input linear prediction parameter vector is...
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7146313 |
Techniques for measurement of perceptual audio quality
An audio processing tool measures the quality of reconstructed audio data. For example, an audio encoder measures the quality of a block of reconstructed frequency coefficient data in a...
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7136842 |
Method and device for adapting a signal for the detection of the movement of an object
Systems and methods for adjusting a signal used for the detection of the movement of an object in a space represented by a set of data A ij , associated with pixels forming a multidimensional space...
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7127391 |
Method and apparatus for slice point determination
A method and apparatus is disclosed for reducing the error rate in a received signal by determining and establishing an optimal slice point for a decision device, or optimal operational parameters....
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7124076 |
Encoding apparatus and decoding apparatus
The present invention relates to encoding apparatuses which allow encoding to be performed such that the occurrence of pre-echo and post-echo is suppressed. A predetermined waveform analysis is...
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7117147 |
Method and system for improving voice quality of a vocoder
The invention concerns a method ( 300 ) and system ( 100 ) for improving voice quality of a vocoder ( 138, 158 ). The method includes the steps of monitoring ( 312 ) a pitch of a voice signal ( 400...
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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...
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7099823 |
Coded voice signal format converting apparatus
A coded voice signal format converting apparatus is provided which is capable of converting a signal format of a coded voice signal by computations in reduced amounts. In the coded voice signal...
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7092879 |
Techniques for quantization of spectral data in transcoding
A transcoder reduces excess requantization error in quantization of spectral data. The transcoder phase shifts data decompressed by a decompressor. The phase shifting causes a change to...
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7092878 |
Speech synthesis using multi-mode coding with a speech segment dictionary
Speech segment data are encoded in accordance with their respective optimum encoding schemes. The speech segment data thus encoded are registered in a speech segment dictionary along with...
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7088779 |
Method and apparatus for reducing the word length of a digital input signal and method and apparatus for recovering a digital input signal
A method and signal processing apparatus for reducing the number of bits of a digital input signal (M i ), includes adding a pseudo-random noise signal (N a ) to the digital input signal (M i ) to...
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7076260 |
Unbalanced coding for cordless telephony
In a digital cordless telephone system, a different speech coding scheme is used in the audio path from the base unit to its remote handset than that which is used in the audio path in the opposite...
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7072832 |
System for speech encoding having an adaptive encoding arrangement
In accordance with one aspect of the invention, a selector supports the selection of a first encoding scheme or the second encoding scheme based upon the detection or absence of the triggering...
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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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7050972 |
Enhancing the performance of coding systems that use high frequency reconstruction methods
An apparatus for encoding an audio signal to obtain an encoded audio signal to be used by a decoder having a high frequency reconstruction module for performing a high frequency reconstruction for...
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7031912 |
Speech coding apparatus capable of implementing acceptable in-channel transmission of non-speech signals
A speech coding apparatus includes a frequency parameter generating unit that generates LSP coefficients of an input signal. When the input signal is a non-speech signal, it generates the LSP...
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7027982 |
Quality and rate control strategy 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...
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7013269 |
Voicing measure for a speech CODEC system
A system and method is provided that employs a frequency domain interpolative CODEC system for low bit rate coding of speech which comprises a linear prediction (LP) front end adapted to process an...
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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...
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6999919 |
Fast convergence method for bit allocation stage of MPEG audio layer 3 encoders
A method for an improved QSS (bit allocator) algorithm is disclosed. The disclosed method is capable of greatly improving determination time; thereby, improving the efficiency of converting a...
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6996521 |
Auxiliary channel masking in an audio signal
A method is provided for embedding data into an audio signal and determining data embedded into an audio signal. In the method for embedding data into an audio signal, the audio signal is based on...
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