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| Number | Title | Issue Date |
| 8423358 | Method and apparatus for performing packet loss or frame erasure concealment A method for performing packet loss or Frame Erasure Concealment (FEC) for a speech coder receives encoded frames of compressed speech information transmitted from an encoder. The method determines whether an encoded frame has been lost, corrupted in transmission, o... | 04/16/2013 |
| 8417519 | Synthesis of lost blocks of a digital audio signal, with pitch period correction The present invention relates to signal modification before pitch period repetition for the synthesis of blocks lost on decoding digital audio signals. The effects of repetition of transitories, such as the plosives of a speech signal, are avoided by comparing the s... | 04/09/2013 |
| 8417520 | Attenuation of overvoicing, in particular for the generation of an excitation at a decoder when data is missing The invention proposes the synthesis of a signal consisting of consecutive blocks. It proposes more particularly, on receipt of such a signal, to replace, by synthesis, lost or erroneous blocks of this signal. To this end, it proposes an attenuation of the overvoici... | 04/09/2013 |
| 8401845 | System and method for enhancing a decoded tonal sound signal A system and method for enhancing a tonal sound signal decoded by a decoder of a speech-specific codec in response to a received coded bit stream, in which a spectral analyser is responsive to the decoded tonal sound signal to produce spectral parameters representat... | 03/19/2013 |
| 8374856 | Method and apparatus for concealing packet loss, and apparatus for transmitting and receiving speech signal A method and apparatus for concealing frame loss and an apparatus for transmitting and receiving a speech signal that are capable of reducing speech quality degradation caused by packet loss are provided. In the method, when loss of a current received frame occurs, ... | 02/12/2013 |
| 8364479 | System for speech signal enhancement in a noisy environment through corrective adjustment of spectral noise power density estimations A system estimates the spectral noise power density of an audio signal includes a spectral noise power density estimation unit, a correction term processor, and a combination processor. The spectral noise power density estimation unit may provide a first estimate of... | 01/29/2013 |
| 8364480 | Method and apparatus for controlling echo in the coded domain A method and corresponding apparatus for coded-domain acoustic echo control is presented. An echo control problem is considered as that of perceptually matching an echo signal to a reference signal. A perceptual similarity function that is based on the coded spectra... | 01/29/2013 |
| 8355911 | Method of lost frame concealment and device A device for lost frame concealment comprises: a lost frame detector for detecting whether a voice frame is lost, a decoding module for decoding the current voice frame, a low band delay module for delaying the low band signal, a low band signal recovering module fo... | 01/15/2013 |
| 8346546 | Packet loss concealment based on forced waveform alignment after packet loss A packet loss concealment method and system is described that attempts to reduce or eliminate destructive interference that can occur when an extrapolated waveform representing a lost segment of a speech or audio signal is merged with a good segment after a packet l... | 01/01/2013 |
| 8335686 | Method and apparatus of audio switching A method for speech switching, including: extracting mute flags from encoded speech data transmitted by each of the terminals respectively in order to determine one or more non-mute terminals; decoding the encoded speech data of each non-mute terminal respectively; ... | 12/18/2012 |
| 8321216 | Time-warping of audio signals for packet loss concealment avoiding audible artifacts Packet loss concealment (PLC) systems and methods are described that use time-warping to merge a concealment signal generated to replace one or more bad frames of an audio signal with a received signal representing one or more subsequent good frames of the audio sig... | 11/27/2012 |
| 8315863 | Post filter, decoder, and post filtering method A post filter and a decoder enabling improvement of the sound quality of a decoded signal even when the sound quality of the decoded signal is different from the bands are disclosed. A frequency converting section determines a decoded spectrum. A power spectrum comp... | 11/20/2012 |
| 8301440 | Bit error concealment for audio coding systems A bit error concealment (BEC) system and method is described herein that detects and conceals the presence of click-like artifacts in an audio signal caused by bit errors introduced during transmission of the audio signal within an audio communications system. A par... | 10/30/2012 |
| 8296136 | Dynamic controller for improving speech intelligibility A system improves the speech intelligibility and the speech quality of a speech segment. The system includes a dynamic controller that detects a background noise from an input by modeling a signal. A variable gain amplifier adjusts the variable gain of the amplifier... | 10/23/2012 |
| 8285543 | Circular frequency translation with noise blending An audio signal is conveyed more efficiently by transmitting or recording a baseband of the signal with an estimated spectral envelope and a noise-blending parameter derived from a measure of the signal's noise-like quality. The signal is reconstructed by translatin... | 10/09/2012 |
| 8260613 | Double talk detector A double talk detector for controlling the echo path estimation in a telecommunication system by indicating when a received coded speech signal is dominated by a non-echo signal; i.e., that so-called double talk exists. This is determined by extracting LSPs from a c... | 09/04/2012 |
| 8255210 | Audio/music decoding device and method utilizing a frame erasure concealment utilizing multiple encoded information of frames adjacent to the lost frame An audio/music decoding device capable of improving quality of a decoded signal generated by conceal processing of a frame erase using a scalable encoding method. The audio/music decoding device includes a frame loss detector that determines whether encoded informat... | 08/28/2012 |
| 8219395 | Frame compensation method and system A frame compensation method is provided. The method includes: obtaining a length of a lost frame and a length of a correct frame; determining that the length of the correct frame is integral power of 2 times of the length of the lost frame, and then obtaining a data... | 07/10/2012 |
| 8214206 | Constrained and controlled decoding after packet loss A technique is described herein for reducing audible artifacts in an audio output signal generated by decoding a received frame in a series of frames representing an encoded audio signal in a predictive coding system. In accordance with the technique, it is determin... | 07/03/2012 |
| 8204879 | System and method for aggregation and monitoring of multimedia data stored in a decentralized way System and method for aggregation and monitoring of multimedia data stored in a decentralized way for triggering upcoming class action events, whereas source databases of the network node are accessed by a filter module, and for at least one rating parameter in conn... | 06/19/2012 |
| 8200484 | Elimination of cross-channel interference and multi-channel source separation by using an interference elimination coefficient based on a source signal absence probability Cross-channel interference is eliminated and multi-channel sources are separated by estimating a source absence probability for a current frame of a first channel output, and determining an interference elimination coefficient for matching a secondary signal of the ... | 06/12/2012 |
| 8185388 | Apparatus for improving packet loss, frame erasure, or jitter concealment The invention presents a method to improve the recovering from packet loss, frame erasure or jitter concealment during signal communication, especially for VoIP (Voice Over Internet Protocol) applications. A variable delay concept (instead of constant delay) is intr... | 05/22/2012 |
| 8160874 | Speech frame loss compensation using non-cyclic-pulse-suppressed version of previous frame excitation as synthesis filter source An audio decoding device performs frame loss compensation capable of obtaining a decoded audio which is natural for ears with little noise. The audio decoding device includes a non-cyclic pulse waveform detection unit for detecting a non-cyclic pulse waveform sectio... | 04/17/2012 |
| 8145480 | Method and apparatus for implementing speech decoding in speech decoder field of the invention The present disclosure relates to a decoding method and apparatus. The method includes: receiving data frames from the coder; if any erroneous frame appears, calculating a pitch lag parameter of the erroneous frame; decoding the data frames according to the calculat... | 03/27/2012 |
| 8126709 | Broadband frequency translation for high frequency regeneration An audio signal is conveyed more efficiently by transmitting or recording a baseband of the signal with an estimated spectral envelope and a noise-blending parameter derived from a measure of the signal's noise-like quality. The signal is reconstructed by translatin... | 02/28/2012 |
| 8041562 | Constrained and controlled decoding after packet loss A technique is described herein for reducing audible artifacts in an audio output signal generated by decoding a received frame in a series of frames representing an encoded audio signal in a predictive coding system. In accordance with the technique, it is determin... | 10/18/2011 |
| 8032365 | Method and apparatus for controlling echo in the coded domain A method and corresponding apparatus for coded-domain acoustic echo control is presented. An echo control problem is considered as that of perceptually matching an echo signal to a reference signal. A perceptual similarity function that is based on the coded spectra... | 10/04/2011 |
| 8032366 | Method and apparatus for low bit rate speech coding detection To increase channel capacity, mobile phone carriers have deployed speech coders, such as Advanced MultiBand Excitation coding (AMBE), in networks to reduce the bit rate of each call. One undesired consequence of employing such speech coders is that the voice quality... | 10/04/2011 |
| 8005670 | Audio glitch reduction To reduce audio glitch rendering buffer of an audio application is pre-filled with natural sounding audio rather than zeros. For every frame of audio sent for rendering, the rendering buffer is also pre-filled or the signal is stretched in the buffer in anticipation... | 08/23/2011 |
| 7983908 | Noise-canceling device for voice communication terminal using configurable multiple digital filters A noise-canceling device of a voice communication terminal that removes noise elements included in received voice signals. The device comprises: a digital filter array that exhibits filter qualities in response to a coefficient setting signal showing each supplied a... | 07/19/2011 |
| 7962335 | Robust decoder Techniques and tools related to delayed or lost coded audio information are described. For example, a concealment technique for one or more missing frames is selected based on one or more factors that include a classification of each of one or more available frames ... | 06/14/2011 |
| 7949523 | Apparatus, method, and computer program product for processing voice in speech A speech processing apparatus includes a rule storing unit that stores therein a rule that correlates one another causes of errors in speech recognition, responding methods each of which is used when an error has occurred during the speech recognition, and respondin... | 05/24/2011 |
| 7930176 | Packet loss concealment for block-independent speech codecs A technique for performing frame erasure concealment (FEC) in a speech decoder. One or more non-erased frames of a speech signal are decoded in a block-independent manner. When an erased frame is detected, a short-term predictive filter and a long-term predictive fi... | 04/19/2011 |
| 7925503 | Method and apparatus for dynamically providing comfort noise A method and apparatus for dynamically enabling the activation and deactivation of comfort noise over a VoIP media path or channel are disclosed. The present method detects all sound levels in the media path and only activates the comfort noise in the absence of sou... | 04/12/2011 |
| 7908140 | Method and apparatus for performing packet loss or frame erasure concealment The invention concerns a method and apparatus for performing packet loss or Frame Erasure Concealment (FEC) for a speech coder that does not have a built-in or standard FEC process. A receiver with a decoder receives encoded frames of compressed speech information t... | 03/15/2011 |
| 7873515 | System and method for error reconstruction of streaming audio information A method includes receiving a sequence of frames containing audio information and determining that a frame is missing in the sequence of frames. The method also includes comparing the frame that precedes the missing frame to the received frames to identify a selecte... | 01/18/2011 |
| 7856355 | Speech quality assessment method and system In one embodiment, distortion in a received speech signal is estimated using at least one model trained based on subjective quality assessment data. A speech quality assessment for the received speech signal is then determined based on the estimated distortion. ... | 12/21/2010 |
| 7844453 | Robust noise estimation An enhancement system improves the estimate of noise from a received signal. The system includes a spectrum monitor that divides a portion of the signal at more than one frequency resolution. Adaptation logic derives a noise adaptation factor of the received signal.... | 11/30/2010 |
| 7831421 | Robust decoder Techniques and tools related to delayed or lost coded audio information are described. For example, a concealment technique for one or more missing frames is selected based on one or more factors that include a classification of each of one or more available frames ... | 11/09/2010 |
| 7827030 | Error management in an audio processing system An audio processing system includes a voice decoder and an audio processor. In one exemplary embodiment, the audio processing system is embedded in a headset unit that is wirelessly coupled to a game console. The voice decoder is used to decode a stream of incoming ... | 11/02/2010 |
