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| Number | Title | Issue Date |
| 8190429 | Providing a codebook for bandwidth extension of an acoustic signal A codebook spectral envelope may be used to extend the bandwidth of a bandwidth limited signal. A system includes codebooks that list codebook spectral envelopes. A codebook spectral envelope may be selected based on a characteristic of the spectral envelope of the ... | 05/29/2012 |
| 8175870 | Dual-pulse excited linear prediction for speech coding The invention proposed a Dual-Pulse Excitation Model; wherein two pulses of each pair of pulses are always adjacent each other. Only one position index for each pair of pulses needs to be sent to the decoder, which saves bits to code all pulse positions. The magnitu... | 05/08/2012 |
| 8160871 | Speech coding method and apparatus which codes spectrum parameters and an excitation signal A wideband speech coding apparatus which causes an input speech signal to be represented by spectrum parameters and an excitation signal. The apparatus includes a coding unit configured to select a plurality of pulses from given pulse position candidates, and to cod... | 04/17/2012 |
| 8155955 | Speech decoding method and apparatus which generates an excitation signal and a synthesis filter A speech decoding method which generates an excitation signal and a synthesis filter from coded data and which obtains a speech signal based on the excitation signal and the synthesis filter. The method includes acquiring identification information used for determin... | 04/10/2012 |
| 8112271 | Audio encoding device and audio encoding method Provided is an audio encoding device capable of improving performance of an adaptive codebook and improving quality of a decoded audio. In this audio encoding device, an adaptive codebook cuts out a vector specified by a comparator from adaptive code vectors stored ... | 02/07/2012 |
| 8078459 | Method and device for updating status of synthesis filters A method and device for updating statuses of synthesis filters are provided. The method includes: exciting a synthesis filter corresponding to a first encoding rate by using an excitation signal of the first encoding rate, outputting reconstructed signal information... | 12/13/2011 |
| 8046216 | Method and device for updating status of synthesis filters A method and device for updating statuses of synthesis filters are provided. The method includes: exciting a synthesis filter corresponding to a first encoding rate by using an excitation signal of the first encoding rate, outputting reconstructed signal information... | 10/25/2011 |
| 8010352 | Method and apparatus for adaptively encoding and decoding high frequency band Provided are a method and apparatus for encoding and decoding an audio signal. According to the present application, a signal of a high frequency band above a preset frequency band is adaptively encoded or decoded in the time domain or in the frequency domain by usi... | 08/30/2011 |
| 7957963 | Voice transcoder First encoded voice bits are transcoded into second encoded voice bits by dividing the first encoded voice bits into one or more received frames, with each received frame containing multiple ones of the first encoded voice bits. First parameter bits for at least one... | 06/07/2011 |
| 7957962 | 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 represented by a lower triangular matrix and realizes a quasi-optimal fixe... | 06/07/2011 |
| 7949521 | 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 represented by a lower triangular matrix and realizes a quasi-optimal fixe... | 05/24/2011 |
| 7921009 | Method and device for updating status of synthesis filters A method and device for updating statuses of synthesis filters are provided. The method includes: exciting a synthesis filter corresponding to a first encoding rate by using an excitation signal of the first encoding rate, outputting reconstructed signal information... | 04/05/2011 |
| 7778827 | Method and device for gain quantization in variable bit rate wideband speech coding The present invention relates to a gain quantization method and device for implementation in a technique for coding a sampled sound signal processed, during coding, by successive frames of L samples, wherein each frame is divided into a number of subframes and each ... | 08/17/2010 |
| 7778826 | Beamforming codebook generation system and associated methods A codebook generation system and associated methods are generally described herein. For instance, a codebook generation agent (CGA) may implement techniques for generating one or more matrix codebooks from vector codebooks. The CGA may be implemented in mobile devic... | 08/17/2010 |
| 7752039 | Method and device for low bit rate speech coding A method for coding speech or other generic signals includes dividing a speech signal into a plurality of frames, and dividing at least one of the plurality of frames into at least two subframe units. A search for a fixed codebook contribution and an adaptive codebo... | 07/06/2010 |
| 7747433 | Method and apparatus for speech encoding by evaluating a noise level based on gain information A high quality speech is reproduced with a small data amount in speech coding and decoding for performing compression coding and decoding of a speech signal to a digital signal. In speech coding method according to a code-excited linear prediction (CELP) speech codi... | 06/29/2010 |
| 7747432 | Method and apparatus for speech decoding by evaluating a noise level based on gain information A high quality speech is reproduced with a small data amount in speech coding and decoding for performing compression coding and decoding of a speech signal to a digital signal. In speech coding method according to a code-excited linear prediction (CELP) speech codi... | 06/29/2010 |
| 7742917 | Method and apparatus for speech encoding by evaluating a noise level based on pitch information A high quality speech is reproduced with a small data amount in speech coding and decoding for performing compression coding and decoding of a speech signal to a digital signal. In speech coding method according to a code-excited linear prediction (CELP) speech codi... | 06/22/2010 |
| 7684978 | Apparatus and method for transcoding between CELP type codecs having different bandwidths The present invention overcomes problems of tandem coding method such as degradation of speech quality, increased system latency and computations. An apparatus for trans-coding between code excited linear prediction (CELP) type codecs with different bandwidths, incl... | 03/23/2010 |
| 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 unit for extracting a lowband linear predictive coding (LPC) coeffic... | 09/29/2009 |
| 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 codevector having a plurality of pulses into a first subset of pulses and a se... | 09/29/2009 |
| 7593848 | Auto-correlators with DC and CW cancellation Embodiments of methods and means for correcting auto-correlated wireless signal samples are provided. Such embodiments include isolating and subtracting an interference vector from auto-correlated signal samples so that a corrected signal sample data set is derived.... | 09/22/2009 |
| 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 random code vector. The decoder also includes a synthesis filter that r... | 09/15/2009 |
| 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 multilevel voicing classification with multiple thresholds of correla... | 09/08/2009 |
| 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 calculates a square sum using a square value of each order. The ... | 08/18/2009 |
| 7574354 | Transcoding between the indices of multipulse dictionaries used in compressive coding of digital signals The invention relates to compressive transcoding between pulse coders using multipulse dictionaries in which each pulse occupies a position marked by an index. For each current pulse position supplied by a first coder, a neighborhood (Vge, V | 08/11/2009 |
| 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. A dispersion pattern determiner determines a dispersion pattern of a ... | 06/09/2009 |
| 7533016 | Speech coder and speech decoder A target vector is coded by multi-stage vector quantization. A first stage of the coding of the target vector is performed using a first code vector stored in a first codebook. A scalar associated with a code of each first code vector is stored in an amplifier stori... | 05/12/2009 |
| 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 composed of 24, 16, and 8 pulses, at a time in a search process, through i... | 05/05/2009 |
| 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 represented by a lower triangular matrix and realizes a quasi-optimal fixe... | 04/14/2009 |
| 7499854 | Speech coder and speech decoder A code excited linear prediction speech decoder is provided. An adaptive codebook generates an adaptive code vector. A random codebook generates a random code vector. A synthesis filter receives a signal based on the adaptive code vector and the random code vector, ... | 03/03/2009 |
| 7493256 | Method and apparatus for high performance low bit-rate coding of unvoiced speech A low-bit-rate coding technique for unvoiced segments of speech, without loss of quality compared to the conventional Code Excited Linear Prediction (CELP) method operating at a much higher bit rate. A set of gains are derived from a residual signal after whitening ... | 02/17/2009 |
| 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 prediction section 125 by extracting decoded speech data in a pre... | 12/16/2008 |
| 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 advantageously substantially identical decoders. In particular, diversi... | 08/12/2008 |
| 7403894 | Annotating programs for automatic summary generations Audio/video programming content is made available to a receiver from a content provider, and meta data is made available to the receiver from a meta data provider. The meta data corresponds to the programming content, and identifies, for each of multiple portions of... | 07/22/2008 |
| 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 respective polarity. A fixed waveform storage system is capable of stori... | 07/08/2008 |
| 7398206 | Speech coding apparatus and speech decoding apparatus First codebook and second codebook respectively have two subcodebooks, and in respective codebooks, addition sections obtain respective excitation vectors by adding sub-excitation vectors fetched from respective two subcodebooks. Addition section obtains an excitati... | 07/08/2008 |
| 7392180 | System and method of coding sound signals using sound enhancement A system and method of processing sound signals are disclosed. In one embodiment, a speech coder applies a first sound signal enhancement process to a first part of a sound signal and applies a second sound signal enhancement process to a second part of the sound si... | 06/24/2008 |
| 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 low-speed transmission speech encoder, includes the steps of rearranging a co... | 06/17/2008 |
| 7386444 | Hybrid speech coding and system Hybrid linear predictive speech coding system with phase alignment predictive quantization zero phase alignment of speech prior to waveform coding aligns synthesized speech frames of a waveform coder with frames synthesized with a parametric coder. Inter-frame inter... | 06/10/2008 |
