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| Number | Title | Issue Date |
| 8095360 | Speech post-processing using MDCT coefficients There is provided a method of post-processing a speech signal. The method comprises applying a time-domain post-processing to the speech signal, using LPC coefficients, for a low-band frequency range and applying a frequency-domain post-processing to the speech sign... | 01/10/2012 |
| 8090574 | Entropy encoding and decoding using direct level and run-length/level context-adaptive arithmetic coding/decoding modes An encoder performs context-adaptive arithmetic encoding of transform coefficient data. For example, an encoder switches between coding of direct levels of quantized transform coefficient data and run-level coding of run lengths and levels of quantized transform coe... | 01/03/2012 |
| 8069036 | Method and apparatus for processing audio for playback A method and apparatus for processing audio for playback to provide a smooth transition between a beginning region of an audio track and an end region of a previous audio track is disclosed. A quantity representative of a chromagram is calculated for each of the aud... | 11/29/2011 |
| 8069037 | System and method for frequency domain audio speed up or slow down, while maintaining pitch Presented herein are system(s) and method(s) for frequency domain audio speed up or slow down, while maintaining pitch. An encoded audio signal is received. Frames from the encoded audio signal are retrieved. The frames of the audio signal are transformed into a fre... | 11/29/2011 |
| 8069038 | System for bandwidth extension of narrow-band speech A system and method are disclosed for extending the bandwidth of a narrowband signal such as a speech signal. The method applies a parametric approach to bandwidth extension but does not require training. The parametric representation relates to a discrete acoustic ... | 11/29/2011 |
| 8065138 | Speech processing method and apparatus, storage medium, and speech system A speech processing apparatus includes a spectrum envelope extracting unit which extracts the spectrum envelope of an input speech signal, a spectrum envelope deforming unit which applies deformation to the spectrum envelope to generate a deformed spectrum envelope,... | 11/22/2011 |
| 8060361 | Communication device with a function of audio modulation and method for audio modulation A method for audio modulation is provided. The method including: obtaining the digital audio signals of the caller in the process of communications; analyzing the digital audio signals and obtain a voice frequency of the caller; reading a voice frequency of the user... | 11/15/2011 |
| 8036884 | Identification of the presence of speech in digital audio data The present invention provides a method, a computer-software-product and an apparatus for enabling a determination of speech related audio data within a record of digital audio data. The method comprises steps for extracting audio features from the record of digital... | 10/11/2011 |
| 8019597 | Scalable encoding apparatus, scalable decoding apparatus, and methods thereof A scalable encoding apparatus capable of reducing the bit rates of encoded parameters and also capable of efficiently encoding audio signals in which a plurality of harmonic structures are coexistent. In the apparatus, an MDCT analyzer MDCT analyzes an audio signal ... | 09/13/2011 |
| 8000958 | Device and method for improving communication through dichotic input of a speech signal The device and method of the present invention improves electronic communication which have behavioral consequences, including for example, flight communication, two-way closed circuit communication such as for fire, police, miners, scuba divers and other heath and ... | 08/16/2011 |
| 7991611 | Speech encoding apparatus and speech encoding method that encode speech signals in a scalable manner, and speech decoding apparatus and speech decoding method that decode scalable encoded signals An audio encoding device for correcting a component having insufficient encoding capability in a core layer by an extended layer. A core layer encoder encodes an audio signal. An extended layer encoder encodes an encoding residual of the core layer encoder. A charac... | 08/02/2011 |
| 7983904 | Scalable decoding apparatus and scalable encoding apparatus A scalable decoding apparatus capable of providing decoded audio signals of high quality having less degradation of a high frequency spectrum even when decoding audio signals by generating the high frequency spectrum by use of a low frequency spectrum. In the appara... | 07/19/2011 |
| 7979270 | Speech recognition apparatus and method Disclosed herein is a voice processing apparatus for recognizing an input voice on the basis of a prosody characteristic of said voice, said voice processing apparatus including: voice acquisition means for acquiring said input voice; acoustic analysis means for fin... | 07/12/2011 |
| 7970604 | System and method for switching between a first filter and a second filter for a received audio signal System, method and computer-readable medium are disclosed for using filters signal processing. The system includes a module that receives information regarding a first filter, a module that receives information regarding a second filter, and a module that receives d... | 06/28/2011 |
| 7949519 | Information communication apparatus, transmission apparatus and receiving apparatus The acoustic signal transmission method is based on generating a synthesized sound electrical signal by electrically synthesizing an audible sound signal and another signal different than the audible sound signal at the sending side, and transmitting the synthesized... | 05/24/2011 |
| 7908134 | Automatic volume control to compensate for speech interference noise A microphone detects acoustic waves from speakers, or for a two-way voice communication device, a user's voice and background noise, and produces a corresponding signal; a subtractor finds the difference between the microphone signal and a desired audio signal; a tr... | 03/15/2011 |
| 7908135 | Music-piece classification based on sustain regions Audio data representative of a music piece is converted into data components in respective different frequency bands for every unit time interval to generate time frequency data pieces assigned to the respective different frequency bands. From the generated time fre... | 03/15/2011 |
| 7899667 | Waveform interpolation speech coding apparatus and method for reducing complexity thereof A waveform interpolation speech coding apparatus and method for reducing complexity thereof are disclosed. The waveform interpolation speech coding apparatus includes: a waveform interpolation encoding unit for receiving a speech signal, calculating parameters for a... | 03/01/2011 |
| 7881592 | Digital audio/video playback system capable of controlling audio and video playback speed A digital audio/video playback system capable of controlling audio and video playback speed for decoding a digital audio/video signal and then outputting such signal. The system includes: a loader configured to receive the digital audio/video signals, a parser confi... | 02/01/2011 |
| 7877252 | Automatic speech recognition method and apparatus, using non-linear envelope detection of signal power spectra An automatic speech recognition method includes converting an acoustic signal into a digital signal; determine a power spectrum of at least one portion of the digital signal; and non-linearly determining envelope values of the power spectrum at a plurality of respec... | 01/25/2011 |
| 7873511 | Audio encoder, audio decoder and audio processor having a dynamically variable warping characteristic An audio encoder, an audio decoder or an audio processor includes a filter for generating a filtered audio signal, the filter having a variable warping characteristic, the characteristic being controllable in response to a time-varying control signal, the control si... | 01/18/2011 |
| 7822599 | Method for synthesizing speech The present invention relates to a method for analyzing speech, the method comprising the steps of: a) inputting a speech signal, b) obtaining the first harmonic of the speech signal, c) determining the phase-difference Df between the speech signal and the first har... | 10/26/2010 |
| 7805294 | Wireless communication apparatus and wireless communication method When a sound presence/absence detector (12) detects a sound absence interval, a non-modulated carrier signal is outputted in an area used to transmit speech data that are included in transmission data having a frame structure and that correspond to the sound ... | 09/28/2010 |
| 7805293 | Band correcting apparatus A voice band correcting apparatus in which the signal level of limit bands is amplified by a correction filter, the signal level of a correction signal supplied is compared by a level detector to a preset level, and the result of decision is sent as level informatio... | 09/28/2010 |
| 7783478 | Two stage frequency subband decomposition A method for multifunctional processing of signals in frequency subbands performs subband decomposition and signal processing in two stages. A fullband signal is first splitted, with downsampling, into wide frequency subband (WFS) signals. Processing algorithms not ... | 08/24/2010 |
| 7765099 | Device for recovering missing frequency components A band recovering device recovers frequency components lying in a frequency band lost due to band-limitation of a sound signal. The device includes a peak-limiting amplifier for amplifying an input narrow-band signal while preventing the resulting amplified signal f... | 07/27/2010 |
| 7739106 | Sinusoidal coding including a phase jitter parameter Encoding (2) a signal (A) is provided, wherein frequency and amplitude information of at least one sinusoidal component in the signal (A) is determined (20), and sinusoidal parameters (f,a) representing the frequency and amplitude information are trans... | 06/15/2010 |
| 7716044 | Sound collecting method and sound collecting device Upon detecting an utterance period by a state decision part 14, a sound source position detecting part 15 detects the positions of sound sources 91 to 9K are detected by a sound source position detecting part 15 | 05/11/2010 |
| 7702502 | Apparatus for signal decomposition, analysis and reconstruction The present invention provides a system and method for representing quasi-periodic (“qp”) waveforms comprising, representing a plurality of limited decompositions of the qp waveform, wherein each decomposition includes a first and second amplitude value and at l... | 04/20/2010 |
| 7693709 | Reordering coefficients for waveform coding or decoding Techniques and tools for reordering of spectral coefficients in encoding and decoding are described herein. For certain types and patterns of content, coefficient reordering reduces redundancy that is due to periodic patterns in the spectral coefficients, making sub... | 04/06/2010 |
| 7676360 | Method for scale-factor estimation in an audio encoder A method, system and computer program product for computationally efficient estimation of the scale factors of one or more frequency bands in an encoder. These scale factors are dependant on a plurality of variables. One of the variables is approximated according to... | 03/09/2010 |
| 7672835 | Voice analysis/synthesis apparatus and program An FFT unit performs an FFT process on high-frequency-eliminated, pitch-shifted voice data for one frame. A time scaling unit calculates a frequency amplitude, a phase, a phase difference between the present and immediately preceding frames, and an unwrapped version... | 03/02/2010 |
| 7657426 | System and method for deploying filters for processing signals A system, method and computer-readable medium are disclosed for using filters signal processing. The system includes a module that calculates a filter for each of a plurality of frequency bands, a module that groups the filters into a plurality of groups, a module t... | 02/02/2010 |
| 7653534 | Apparatus and method for determining a type of chord underlying a test signal An apparatus for determining a type of chord has a means for providing a reference vector for the type of chord, a means for providing a reference vector from a test signal, and a means for comparing the reference vector with the test signal vector. The means for pr... | 01/26/2010 |
| 7650279 | Sound source separation apparatus and sound source separation method To shorten an output delay while a high sound source separation performance is ensured when a sound separation process based on an ICA method is performed. A second Fourier transform process execution cycle t2 for obtaining a second frequency-domain signal S | 01/19/2010 |
| 7636659 | Computer-implemented methods and systems for modeling and recognition of speech In accordance with the present invention, computer implemented methods and systems are provided for representing and modeling the temporal structure of audio signals. In response to receiving a signal, a time-to-frequency domain transformation on at least a portion ... | 12/22/2009 |
| 7634400 | Device and process for use in encoding audio data A mask generation process for use in encoding audio data, including generating linear masking components from the audio data, generating logarithmic masking components from the linear masking components, and generating a global masking threshold from the logarithmic... | 12/15/2009 |
| 7630882 | Frequency segmentation to obtain bands for efficient coding of digital media Frequency segmentation is important to the quality of encoding spectral data. Segmentation involves breaking the spectral data into units called sub-bands or vectors. Homogeneous segmentation may be suboptimal. Various features are described for providing spectral d... | 12/08/2009 |
| 7613604 | System for bandwidth extension of narrow-band speech A system and method are disclosed for extending the bandwidth of a narrowband signal such as a speech signal. The method applies a parametric approach to bandwidth extension but does not require training. The parametric representation relates to a discrete acoustic ... | 11/03/2009 |
| 7587312 | Method and apparatus for pitch modulation and gender identification of a voice signal A method and apparatus for modulating pitch and identifying gender of a voice signal is provided. The voice modulation apparatus includes an LPC analyzer for obtaining vocal track filter coefficients reflecting characteristics of an input voice signal, a pitch detec... | 09/08/2009 |
