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7613607 |
Audio enhancement in coded domain
Method and apparatus for enhancing a coded audio signal comprising indices which represent audio signal parameters which comprise at least a first parameter representing a first characteristic of...
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7613606 |
Speech codecs
A method of encoding a frame in a communication network using multiple codec modes, wherein the frame encoded by each codec mode is represented by multiple parameters. The method includes at least...
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7599834 |
Method and apparatus of voice mixing for conferencing amongst diverse networks
A conferencing system is provided that utilizes both time domain signal mixing and direct signal fast transcoding. An exemplary embodiment of the present invention utilizes both time domain signal...
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7599833 |
Apparatus and method for coding residual signals of audio signals into a frequency domain and apparatus and method for decoding the same
Provided is a residual signal coding/decoding apparatus and method. The residual signal coding apparatus includes a transformer, an LPC coefficient extractor, an LPC coefficient quantizer, an LP...
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7596493 |
System and method for supporting multiple speech codecs
A method for performing a search of a codebook is provided. The codebook includes a plurality of tracks each having a plurality of even pulse positions. The method includes partitioning a...
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7580834 |
Fixed sound source vector generation method and fixed sound source codebook
At the speech encoding end, upon generation of an fixed excitation vector, the shape of an excitation vector output from pulse excitation codebook 301 is identified in pulse excitation vector...
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7577566 |
Method for encoding sound source of probabilistic code book
A stochastic codebook associates a pulse position of a predetermined channel with a pulse position of another channel, searches for a pulse position by means of a predetermined algorithm, and...
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7571094 |
Circuits, processes, devices and systems for codebook search reduction in speech coders
An electronic circuit includes storage circuitry and a speech coder coupled with the storage circuitry to have a codebook with sets of track location numbers for respective pulses, the speech coder...
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7565287 |
Methods and apparatus for efficient vocoder implementations
Techniques for implementing vocoders in parallel digital signal processors are described. A preferred approach is implemented in conjunction with the BOPS® Manifold Array (ManArray™) processing...
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7562021 |
Modification of codewords in dictionary used for efficient coding of digital media spectral data
Coding of spectral data by representing certain portions of the spectral data as a scaled version of a code-vector, where the code-vector is chosen from either a fixed predetermined codebook or a...
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7546238 |
Digital circuit transmission device
A digital line transmission unit can carry out switching between speech codecs during the same call to achieve balance between making effective use of a line and a high sound quality without...
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7536305 |
Mixed lossless audio compression
A mixed lossless audio compression has application to a unified lossy and lossless audio compression scheme that combines lossy and lossless audio compression within a same audio signal. The mixed...
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7529663 |
Method for flexible bit rate code vector generation and wideband vocoder employing the same
Provided are a flexible bit rate code vector generation method and a wideband vocoder employing the same. This invention implements a flexible bit rate by getting three code vectors which are...
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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...
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7519532 |
Transcoding EVRC to G.729ab
Transcoding from EVRC to G.729ab with LSP parameters interpolated from EVRC to G.729ab, EVRC pitch used as input to G.729ab closed-loop pitch search, and G.729ab fixed codebook pulses found from a...
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7505764 |
Method for retransmitting a speech packet
The invention provides a method of retransmitting a speech packet. In one embodiment, the method includes receiving (S 702 ) at a transmitting device ( 140 ) a first negative acknowledgement (NACK)...
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7499403 |
Control component removal of one or more encoded frames from isochronous telecommunication stream based on one or more code rates of the one or more encoded frames to create non-isochronous telecommunications stream
An isochronous telecommunication stream comprises a plurality of frames encoded by a variable rate isochronous coder-decoder (codec) at a plurality of code rates of multiple available code rates. A...
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7496505 |
Variable rate speech coding
A method and apparatus for the variable rate coding of a speech signal. An input speech signal is classified and an appropriate coding mode is selected based on this classification. For each...
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7490036 |
Adaptive equalizer for a coded speech signal
A speech communication system provides a speech encoder that generates a set of coded parameters representative of the desired speech signal characteristics. The speech communication system also...
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7486719 |
Transcoder and code conversion method
A two-way conversion transcoder comprising a spectrum parameter calculation circuit that calculates a spectrum parameter for a signal produced by decoding a first code; a coefficient calculation...
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7480614 |
Energy feature extraction method for noisy speech recognition
The present invention provides an energy feature extraction method for noisy speech recognition. At first, noisy speech energy of an input noisy speech is computed. Next, the noise energy in the...
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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...
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7433815 |
Method and apparatus for voice transcoding between variable rate coders
A variable-rate voice transcoder that transcodes a bitstream representing frames of data encoded according to a first compression standard to a bitstream representing frames of data according to a...
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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...
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7398205 |
Code excited linear prediction speech decoder and method thereof
An excitation vector generator includes an input vector providing system that is capable of providing an input vector having at least one pulse, each pulse having a predetermined position and a...
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7395202 |
Method and apparatus to facilitate vocoder erasure processing
Upon receiving ( 101 ) a vocoded voice frame and detecting ( 102 ) that the received vocoded voice frame comprises an erased frame, one automatically replaces ( 103 ) the erased frame with a valid...
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7386447 |
Speech coder and method
An overflow problem of LSF quantization in G.729 Annex B speech encoding which may lead to non-assignment of a codebook index. Preferred embodiments fix the problem with default or limited random...
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7363218 |
Method and apparatus for fast CELP parameter mapping
An apparatus and method for mapping CELP parameters between a source codec and a destination codec. The apparatus includes an LSP mapping module, an adaptive codebook mapping module coupled to the...
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7315814 |
Method and apparatus providing adaptive multi-rate speech coding
A wireless telecommunications system comprises a mobile station (MS) and a network. The mobile station has a multi-rate speech encoder which produces an encoded speech signal which is transmitted...
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7295970 |
Unsupervised speaker segmentation of multi-speaker speech data
Systems and methods for unsupervised segmentation of multi-speaker speech or audio data by speaker. A front-end analysis is applied to input speech data to obtain feature vectors. The speech data...
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7266496 |
Speech recognition system
The present invention discloses a complete speech recognition system having a training button and a recognition button, and the whole system uses the application specific integrated circuit (ASIC)...
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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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7251598 |
Speech coder/decoder
A coding parameter control circuit 31 computes a frame length from a bit rate and coding delay, and provides the computed frame length data to a CELP coding circuit 32. Based on the computed...
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7233896 |
Regular-pulse excitation speech coder
A method for providing synthesized speech using regular-pulse excitation includes a first step ( 300 ) of processing input speech to provide a residual excitation signal. A next step ( 302 )...
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7227994 |
Method and apparatus for imbedded pattern recognition using dual alternating pointers
A method and apparatus for finding a reference pattern (RP) with K elements imbedded in an input pattern IP with repeating substrings uses dual pointers to point to elements in the RP to compare...
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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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7203650 |
Telecommunication system, speech recognizer, and terminal, and method for adjusting capacity for vocal commanding
In telecommunication systems including a terminal and a speech recognizer for vocal commanding, an indication signal originating from the terminal is detected, e.g., a telephone number dialed or a...
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7191126 |
Sound encoder and sound decoder performing multiplexing and demultiplexing on main codes in an order determined by auxiliary codes
A sound encoder and sound decoder that encode and decode, respectively, variable length codes on a frame by frame basis, the coding including main codes and auxiliary codes in which auxiliary codes...
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7184953 |
Transcoding method and system between CELP-based speech codes with externally provided status
An apparatus for processing CELP-based frames includes a first module for extracting a CELP parameter from a source codec, a second module coupled to the first module adapted to interpolate between...
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7181000 |
Voice transmission device and voice transmission system
A voice transmission device has a tandem pass through function in an STM, ATM, IP network, and a noise canceller ( 21 ) is provided at a latter stage of an echo canceller ( 12 ) in a coding part,...
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7177863 |
System and method for determining internal parameters of a data clustering program
A system and associated method for tuning a data clustering program to a clustering task, determine at least one internal parameter of a data clustering program. The determination of one or more of...
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7143030 |
Parametric compression/decompression modes for quantization matrices for digital 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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7139700 |
Hybrid speech coding and system
Linear predictive speech coding system with classification of frames and a hybrid coder using both waveform coding and parametric coding for different classes of frames. Phase alignment for a...
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7136812 |
Variable rate speech coding
A method and apparatus for the variable rate coding of a speech signal. An input speech signal is classified and an appropriate coding mode is selected based on this classification. For each...
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7136811 |
Low bandwidth speech communication using default and personal phoneme tables
A voice coding and decoding system 300 and method uses a personal phoneme table ( 320, 344 ) associated with a voice signature identifier ( 348 ) to permit encoding of true sounding voice by...
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7127390 |
Rate determination coding
A speech encoding system and method for encoding a speech data signal including a number of frames. The speech encoding system includes a speech data rate determinator and a number of speech data...
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7120578 |
Silence description coding for multi-rate speech codecs
Speech coding systems include multi-rate speech codecs having an encoder and a decoder. Silence description coding for multi-rate speech coding systems that employ discontinued transmission is...
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7107208 |
Dual mode radio mobile terminal in which an analog or digital mode is determined by request of a voice function
A method for operating a voice function of a dual-mode mobile communication apparatus including a speaker's voice recognition function and a voice output function of stored information while the...
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7092875 |
Speech transcoding method and apparatus for silence compression
A first CN code (silence code) obtained by encoding a silence signal, which is contained in an input signal, by a silence compression function of a first speech encoding scheme is transcoded to a...
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7085724 |
Linking in parametric encoding
The invention relates to a linking unit 100 , a parametric encoder 400 and a method for generating linking information L indicating components of consecutive extended segments sp and sc which...
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