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| Number | Title | Issue Date |
| 8190428 | Method for speech coding, method for speech decoding and their apparatuses 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... | 05/29/2012 |
| 8185385 | Method for searching fixed codebook based upon global pulse replacement The present research can decrease the amount of computation and enhance speech quality by using a global pulse replacement method in a fixed codebook search. The fixed codebook search method in a speech encoder based upon global pulse replacement, includes the steps... | 05/22/2012 |
| 8180632 | Method for limiting adaptive excitation gain in an audio decoder Decoder for an audio signal coded by a coder including a long-term prediction filter wherein the decoder comprises: a block (211) for detecting transmission frame losses; a module (222) for calculating values of an error indication function representat... | 05/15/2012 |
| 8180631 | Apparatus and method of processing an audio signal, utilizing a unique offset associated with each coded-coefficient In one embodiment of the method, a block of digital audio data is stored in a buffer, and a set of parcor values are calculated for the block of digital audio data. Then, the parcor values are entropy encoded for transmission. The entropy coding includes selecting a... | 05/15/2012 |
| 8160869 | Method and apparatus for encoding continuation sinusoid signal information of audio signal and method and apparatus for decoding same Provided are a method and apparatus for encoding an audio signal and a method and apparatus for decoding an audio signal. The method includes performing sinusoidal analysis on an audio signal in order to extract a sinusoidal signal of a current frame, determining co... | 04/17/2012 |
| 8160870 | Method, apparatus, program, and recording medium for long-term prediction coding and long-term prediction decoding A method and apparatus multiplies a past sample a time lag τ older than a current sample by a quantized multiplier ρ′ on a frame by frame basis, subtracts the multiplication result from the current sample, codes the subtraction result, and codes the time lag usi... | 04/17/2012 |
| 8150684 | Scalable decoder preventing signal degradation and lost data interpolation method A scalable decoder capable of preventing degradation of the quality of the decoded signal in a disappeared data interpolation in band scalable coding. A core layer decoding section (101) acquires a core layer decoded signal and narrow band spectrum informatio... | 04/03/2012 |
| 8135585 | Method and an apparatus for processing a signal An apparatus and method for processing an encoded signal are discussed. The method includes: if a coding type of an audio signal is a mixed signal coding type, extracting spectral data and a linear predictive coefficient from the audio signal; generating a residual ... | 03/13/2012 |
| 8135584 | Method and arrangements for coding audio signals According to the invention, an excitation signal is generated as a result of sampled excitation values in order to excite an audio synthesis filter, the generated sampled excitation values being continuously stored in an adaptive codebook. A noise generator is provi... | 03/13/2012 |
| 8126707 | Method and system for speech compression Methods, encoders, and digital systems are provided for predictive encoding of speech parameters in which an input frame is encoded by quantizing a parameter vector of the input frame with a strongly-predictive codebook and a weakly-predictive codebook to obtain a s... | 02/28/2012 |
| 8121832 | Method and apparatus for encoding and decoding high frequency signal Provided are a method and apparatus for encoding and decoding a high frequency signal by using a low frequency signal. The high frequency signal can be encoded by extracting a coefficient by linear predicting a high frequency signal, and encoding the coefficient, ge... | 02/21/2012 |
| 8121831 | Method, apparatus, and medium for bandwidth extension encoding and decoding Provided are a method, apparatus, and medium for encoding/decoding a high frequency band signal by using a low frequency band signal corresponding to an audio signal or a speech signal. Accordingly, since the high frequency band signal is encoded and decoded by usin... | 02/21/2012 |
| 8121833 | Signal modification method for efficient coding of speech signals The exemplary embodiments of the invention provide at least a method and an apparatus to perform operations including dividing a sound signal into a series of successive frames, dividing each frame into a number of subframes, producing a residual signal by filtering... | 02/21/2012 |
| 8117028 | Method and device for code conversion between audio encoding/decoding methods and storage medium thereof When performing audio communication by using different encoding/decoding methods, a code obtained by encoding audio by a certain method is converted into a code decodable by another method with a high audio quality and a small calculation amount. In a code conversio... | 02/14/2012 |
| 8086450 | Excitation vector generator, speech coder and speech decoder A code excited linear prediction type speech coder, which includes a seed storage that stores seeds used as an initial state of oscillation, and an oscillator that generates different vector sequences in accordance with values of the seeds stored in the seed storage... | 12/27/2011 |
| 8082146 | Noise canceller using forward and backward linear prediction with a temporally nonlinear linear weighting A noise canceller is constituted by a forward linear prediction processor that performs forward linear prediction for a reception signal in a noisy section where the reception signal includes noise, and a backward linear prediction processor that performs backward l... | 12/20/2011 |
| 8078458 | Packet loss concealment for sub-band predictive coding based on extrapolation of sub-band audio waveforms A technique is described for concealing the effect of a lost frame in a series of frames representing an encoded audio signal in a sub-band predictive coding system. In accordance with the technique, a first synthesized sub-band audio signal is synthesized, wherein ... | 12/13/2011 |
| 8078457 | Method for adapting for an interoperability between short-term correlation models of digital signals The invention relates to the code conversion of digital signals, particularly voice signals, and in particular coding according to a second format from information obtained by carrying out a coding according to a first format. These first and second formats use LPC ... | 12/13/2011 |
| 8065141 | Apparatus and method for processing signal, recording medium, and program A signal processing apparatus includes a decoding unit, an analyzing unit, a synthesizing unit, and a selecting unit. The decoding unit decodes an input encoded audio signal and outputs a playback audio signal. When loss of the encoded audio signal occurs, the analy... | 11/22/2011 |
| 8032362 | Audio signal encoding/decoding method and apparatus Provided is an audio signal encoding method including transforming an input signal from a time domain to a time/frequency domain using a first transformation method, extracting a stereo parameter from a signal of the time/frequency domain, encoding the stereo parame... | 10/04/2011 |
| 8024182 | Rate/diversity adaptation sending speech in first and second packets Packets of real-time information are sent with a source rate greater than zero kilobits per second, and a time or path or combined time/path diversity rate initially being zero kilobits per second. This results in a quality of service QoS, optionally measured at the... | 09/20/2011 |
| 8000960 | Packet loss concealment for sub-band predictive coding based on extrapolation of sub-band audio waveforms A technique is described for concealing the effect of a lost frame in a series of frames representing an encoded audio signal in a sub-band predictive coding system. In accordance with the technique, a first synthesized sub-band audio signal is synthesized, wherein ... | 08/16/2011 |
| 7991612 | Low complexity no delay reconstruction of missing packets for LPC decoder Lost frame reconstruction is described. A previous good or reconstructed frame may be analyzed to determine a category for the lost frame. A percentage Pi may be associated with the determined category of the lost frame. A top Pi percent magnit... | 08/02/2011 |
| 7979271 | Methods and devices for switching between sound signal coding modes at a coder and for producing target signals at a decoder Methods and devices are used for switching between sound signal coding modes and for producing from a decoded target signal, an overlap-add target signal in a current frame coded according to a first mode. On a coder side, switching is at the junction between a prev... | 07/12/2011 |
| 7979272 | System and methods for concealing errors in data transmission The present invention provides a frame erasure concealment device and method that is based on reestimating gain parameters for a code excited linear prediction (CELP) coder. During operation, when a frame in a stream of received data is detected as being erased, the... | 07/12/2011 |
| 7974839 | Method, medium, and apparatus encoding scalable wideband audio signal Provided is a method and apparatus for encoding a scalable wideband audio signal, the method including: filtering a voiced signal by performing linear prediction on the voiced signal and modulating the filtered signal; encoding the modulated signal in the time domai... | 07/05/2011 |
| 7970605 | Method, apparatus, program and recording medium for long-term prediction coding and long-term prediction decoding A method and apparatus multiplies a past sample a time lag τ older than a current sample by a quantized multiplier ρ′ on a frame by frame basis, subtracts the multiplication result from the current sample, codes the subtraction result, and codes the time lag usi... | 06/28/2011 |
| 7957961 | Method and apparatus for obtaining an attenuation factor The present invention discloses a method for obtaining an attenuation factor. The method is adapted to process the synthesized signal in packet loss concealment, and includes: obtaining a change trend of a pitch of a signal; obtaining an attenuation factor, accordin... | 06/07/2011 |
| 7937266 | Audio reproduction circuit An audio reproduction circuit has an input buffer for holding MP3 data. The audio reproduction circuit also has an MP3 decoder for reading and decoding, in certain processing units, the MP3 data held in the input buffer, and generating voice data. The audio reproduc... | 05/03/2011 |
| 7937267 | Method and apparatus for decoding In a speech decoding method and apparatus, an adaptive code vector is obtained from an adaptive codebook, and a time series vector is obtained from an excitation codebook. Gains of the adaptive code vector and an excitation code vector are respectively decoded from ... | 05/03/2011 |
| 7933769 | Methods and devices for low-frequency emphasis during audio compression based on ACELP/TCX In a method and device for low-frequency emphasis, where the spectrum of a sound signal is transformed in a frequency domain and comprises transform coefficients grouped in a number of blocks, a maximum energy for one block having a position index is calculated. Als... | 04/26/2011 |
| 7912711 | Method and apparatus for speech data There is disclosed a speech processing device in which prediction taps for finding prediction values of the speech of high sound quality are extracted from the synthesized sound obtained on affording linear prediction coefficients and residual signals, generated fro... | 03/22/2011 |
| 7904292 | Scalable encoding device, scalable decoding device, and method thereof A scalable encoding device for realizing scalable encoding by CELP encoding of a stereo sound signal and improving the encoding efficiency. In this device, an adder and a multiplier obtain an average of a first channel signal CH1 and a second channel signal C... | 03/08/2011 |
| 7895035 | Scalable decoding apparatus and method for concealing lost spectral parameters There is provided a scalable decoding device capable of improving resistance against a transmission error. In the device, a narrow band LSP decoding unit (108) decodes narrow band LSP encoded information corresponding to a core layer of the current encoded in... | 02/22/2011 |
| 7869992 | Method and apparatus for using a waveform segment in place of a missing portion of an audio waveform A method for using a waveform segment in place of a missing portion of an audio waveform generated in response to a packet stream encoding portions of the audio waveform, the method comprising: phase matching a trailing portion of the waveform segment with a trailin... | 01/11/2011 |
| 7860709 | Audio encoding with different coding frame lengths The invention relates to a method for supporting an encoding of an audio signal, wherein at least one section of the audio signal is to be encoded with a coding model that allows the use of different coding frame lengths. In order to enable a simple selection of the... | 12/28/2010 |
| 7860710 | Methods, devices and systems for improved codebook search for voice codecs An electronic circuit (1100) including a processor circuit (1110) and a storage circuit establishing a speech coder (1170) for execution by said processor (1110), the speech coder (1170) for approximating speech by pulses having pu... | 12/28/2010 |
| 7848922 | Method and apparatus for a thin audio 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 bitstream signal is associated with at least a first standard of a first plur... | 12/07/2010 |
| 7844451 | Spectrum coding/decoding apparatus and method for reducing distortion of two band spectrums A coding apparatus capable of coding a spectrum at a low bit rate and with high quality without producing any disturbance in a harmonic structure of the spectrum. In this apparatus, internal state setting section (106) sets an internal state of filtering sect... | 11/30/2010 |
| 7840402 | Audio encoding device, audio decoding device, and method thereof There is disclosed an audio encoding device capable of realizing effective encoding while using audio encoding of the CELP method in an extended layer when hierarchically encoding an audio signal. In this device, a first encoding section (115) subjects an inp... | 11/23/2010 |
