|
Match
|
Document |
Document Title |
|
|
7606711 |
Audio signal processing device, signal recovering device, audio signal processing method and signal recovering method
The pitch extracting part generates a pitch waveform signal in a manner making the time interval of the pitch of the input audio sound data to be the same. After the number of samples in each...
|
|
|
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...
|
|
|
7596492 |
Apparatus and method for concealing highband error in split-band wideband voice codec and decoding
An apparatus for concealing a highband error in a spilt-band wideband voice codec in accordance with the present invention is disclosed. The apparatus includes: a lowband LPC coefficient extracting...
|
|
|
7596491 |
Layered CELP system and method
Layered (embedded) code-excited linear prediction (CELP) speech encoders/decoders with adaptive plus algebraic codebooks applied in each layer with fixed codebook pulses of one layer used in higher...
|
|
|
7596490 |
Low bit-rate audio encoding
In a sinusoidal audio encoder a number of sinusoids are estimated per audio segment. A sinusoid is represented by frequency, amplitude and phase. The invention uses a track dependent quantization...
|
|
|
7590525 |
Frame erasure concealment for predictive speech coding based on extrapolation of speech waveform
A method and system are provided for synthesizing a number of corrupted frames output from a decoder including one or more predictive filters. The corrupted frames are representative of one segment...
|
|
|
7587315 |
Concealment of frame erasures and method
A decoder for code excited LP encoded frames with both adaptive and fixed codebooks; erased frame concealment uses repetitive excitation plus a smoothing of pitch gain in the next good frame, plus...
|
|
|
7587313 |
Audio coding
The method creates an audio stream comprising tracks of sinusoidal components linked across a plurality of sequential time segments. Segments in each track are weighted with a normal window (WI, W...
|
|
|
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 ...
|
|
|
7558224 |
Management of packet-based audio devices within acoustic spaces
A system includes multiple packet-based communication devices that support audio output and other suitable functionality and an acoustic space management device that manages these devices to...
|
|
|
7548852 |
Quality of decoded audio by adding noise
The present invention relates to a method of encoding and decoding an audio signal. The invention further relates to an arrangement for encoding and decoding an audio signal. The invention further...
|
|
|
7525952 |
Method and apparatus for determining the source of user-perceived voice quality degradation in a network telephony environment
Techniques for finding the source of perceptual audio degradation in an IP telephony environment provide a hop-by-hop analysis of a network over which IP telephony is laid, and may be performed by...
|
|
|
7523032 |
Speech coding method, device, coding module, system and software program product for pre-processing the phase structure of a to be encoded speech signal to match the phase structure of the decoded signal
The invention relates to a method for use in parametric speech coding. In order to enable an improved parametric coding of speech signals, the method comprises a first step of pre-processing a to...
|
|
|
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...
|
|
|
7496504 |
Method and apparatus for searching for combined fixed codebook in CELP speech codec
Provided are a combined, fixed codebook searching method and apparatus used in a code excited linear prediction (CELP) speech codec. The method is used in a code excited linear prediction (CELP)...
|
|
|
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...
|
|
|
7483830 |
Speech decoder and a method for decoding speech
A speech decoder comprises a decoder ( 103 ) for converting a linear prediction encoded speech signal into a first sample stream having a first sampling rate and representing a first frequency...
|
|
|
7475011 |
Greedy algorithm for identifying values for vocal tract resonance vectors
A method and apparatus identify values for components of a vocal tract resonance vector by sequentially determining values for each component of the vocal tract resonance vector. To determine a...
|
|
|
7472059 |
Method and apparatus for robust speech classification
A speech classification technique for robust classification of varying modes of speech to enable maximum performance of multi-mode variable bit rate encoding techniques. A speech classifier...
|
|
|
7472056 |
Transcoder for speech codecs of different CELP type and method therefor
A transcoder for use between speech codecs using different Code-Excited Linear Prediction (CELP) type and a method therefor are disclosed. The transcoder includes a decoding unit of an input CELP...
|
|
|
7467083 |
Data processing apparatus
The present invention relates to a data processing apparatus capable of obtaining high-quality sound data. A tap generation section 121 generates a prediction tap used for a process in a...
|
|
|
7454328 |
Speech encoding system, and speech encoding method
A speech encoding apparatus calculates encoding distortion of a noise-like fixed code vector and multiplies the encoding distortion by a fixed weight corresponding to the noise-like degree of the...
|
|
|
7450699 |
Method and system for call answer while connected to voice mail
A method and system for call answer while connected to voice mail includes generating real-time packets for transmission of a message toward a voice mail system. Generation of the real-time packets...
|
|
|
7430507 |
Frequency domain format enhancement
A method for enhancing speech prediction coefficient signals, including: a) receiving a set of prediction coefficient signals; b) calculating a set of amplitude spectrum coefficient signals based...
|
|
|
7424423 |
Method and apparatus for formant tracking using a residual model
A method of tracking formants defines a formant search space comprising sets of formants to be searched. Formants are identified for a first frame in the speech utterance by searching the entirety...
|
|
|
7379866 |
Simple noise suppression model
An approach for efficiently reducing background noise from speech signal in real-time applications is presented. A noisy input speech signal is processed through an inverse filter when the spectrum...
|
|
|
7373298 |
Apparatus and method for coding excitation signal
An excitation signal coding apparatus capable of improving an error resilience by changing an excitation vector search method (more specifically, an error minimization criterion during a search)....
|
|
|
7366661 |
Information extracting device
The present invention relates to an information extraction apparatus capable of analyzing an acoustic signal with accuracy and high efficiency. An amplitude analysis section 32 determines...
|
|
|
7363217 |
Method for analyzing energy consistency to process data
A method for analyzing energy consistency to process data, for use with an electronic apparatus, includes the steps of analyzing energy consistency to process data, performing a data-buffering...
|
|
|
7356465 |
Perfected device and method for the spatialization of sound
The invention relates to a computer device comprising a memory 108 for storing audio signals 114 , in part pre-recorded, each corresponding to a defined source, by means of spatial position data...
|
|
|
7353168 |
Method and apparatus to eliminate discontinuities in adaptively filtered signals
A method to eliminate discontinuities in an adaptively filtered signal includes filtering a beginning portion of a current signal frame using a past set of filter coefficients, thereby producing a...
|
|
|
7346503 |
Transmitter and receiver for speech coding and decoding by using additional bit allocation method
The present invention relates to a transmitter and a receiver for speech coding and decoding by using an additional bit allocation method. The transmitter and the receiver according to the present...
|
|
|
7337109 |
Multiple step adaptive method for time scaling
A multiple step adaptive method for time scaling. Synthesizing S 3 [n] signal from signal S 1 [n]signal and S 2 [n]signal. Comprising following steps: (a) calculating a first magnitude of a...
|
|
|
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...
|
|
|
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...
|
|
|
7289953 |
Apparatus and method for speech coding
A speech encoder includes an LPC synthesizer that obtains synthesized speech by filtering an adaptive excitation vector and a stochastic excitation vector stored in an adaptive codebook and in a...
|
|
|
7283955 |
Source coding enhancement using spectral-band replication
The present invention proposes a new method and apparatus for the enhancement of source coding systems. The invention employs bandwidth reduction ( 101 ) prior to or in the encoder ( 103 ),...
|
|
|
7280960 |
Sub-band voice codec with multi-stage codebooks and redundant coding
Techniques and tools related to coding and decoding of audio information are described. For example, redundant coded information for decoding a current frame includes signal history information...
|
|
|
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...
|
|
|
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...
|
|
|
7260523 |
Sub-band speech coding system
An improved sub-band speech coding system is provided by subdividing signals into a lower an higher subband, downsampling the lower subband before coding and coding the higher subband without...
|
|
|
7254534 |
Method and device for encoding wideband speech
The speech is sampled in such a way as to obtain successive voice frames each including a predetermined number of samples, and with each voice frame are determined parameters of a code-excited...
|
|
|
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...
|
|
|
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 )...
|
|
|
7228272 |
Continuous time warping for low bit-rate CELP coding
A signal modification technique facilitates compact voice coding by employing a continuous, rather than piece-wise continuous, time warp contour to modify an original residual signal to match an...
|
|
|
7212971 |
Control apparatus for enabling a user to communicate by speech with a processor-controlled apparatus
A control apparatus controls the display of text data which includes a speech link that can be activated by spoken command. The shape of a pointing device cursor displayed on a display is then...
|
|
|
7212965 |
Robust parameters for noisy speech recognition
A method of automatic processing of noise-affected speech captures and digitizes speech in the form of at least one digitised signal and extracts several time-based sequences or frames...
|
|
|
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...
|
|
|
7200552 |
Gradient descent optimization of linear prediction coefficients for speech coders
An optimization algorithm is provided for linear prediction based speech coding systems. The optimization algorithm minimizes the error between original speech samples and synthesized speech...
|