Patent application number | Description | Published |
20090063139 | Signal modification method for efficient coding of speech signals - For determining a long-term-prediction delay parameter characterizing a long term prediction in a technique using signal modification for digitally encoding a sound signal, the sound signal is divided into a series of successive frames, a feature of the sound signal is located in a previous frame, a corresponding feature of the sound signal is located in a current frame, and the long-term-prediction delay parameter is determined for the current frame while mapping, with the long term prediction, the signal feature of the previous frame with the corresponding signal feature of the current frame. In a signal modification method for implementation into a technique for digitally encoding a sound signal, the sound signal is divided into a series of successive frames, each frame of the sound signal is partitioned into a plurality of signal segments, and at least a part of the signal segments of the frame are warped while constraining the warped signal segments inside the frame. For searching pitch pulses in a sound signal, a residual signal is produced by filtering the sound signal through a linear prediction analysis filter, a weighted sound signal is produced by processing the sound signal through a weighting filter, the weighted sound signal being indicative of signal periodicity, a synthesized weighted sound signal is produced by filtering a synthesized speech signal produced during a last subframe of a previous frame of the sound signal through the weighting filter, a last pitch pulse of the sound signal of the previous frame is located from the residual signal, a pitch pulse prototype of given length is extracted around the position of the last pitch pulse of the sound signal of the previous frame using the synthesized weighted sound signal, and the pitch pulses are located in a current frame using the pitch pulse prototype. | 03-05-2009 |
20090271204 | Audio Compression - For audio encoding and decoding, in order to enhance coded audio signals, the audio signal is divided into at least a low frequency band and a high frequency band, the high frequency band is divided into at least two high frequency sub-band signals, and parameters are generated that refer at least to the low frequency band signal sections which match best with high-frequency sub-band signals. | 10-29-2009 |
20100250260 | Encoder - A method including generating from a first audio signal, and via a first encoding and decoding of the first audio signal, a second audio signal; determining at least one energy difference value between the first audio signal and the second audio signal; and calculating at least one signal shaping factor dependent on the at least one energy difference value. | 09-30-2010 |
20100250261 | Encoder - An apparatus including at least one processor and at least one memory including computer program code the at least one memory and the computer program code configured to, with the at least one processor, cause the apparatus at least to select at least two single frequency components; generate an indicator, the indicator being configured to represent the at least two single frequency components and is configured to be dependent on the frequency separation between the two single frequency components. | 09-30-2010 |
20100274555 | Audio Coding Apparatus and Method Thereof - An apparatus comprising at least one processor and at least one memory including computer program code the at least one memory and the computer program code configured to, with the at least one processor, cause the apparatus at least to determine at least one characteristic of the audio signal; divide the audio signal into at least a low frequency portion and a high frequency portion, and generate from the high frequency portion a plurality of high frequency band signals dependent on the at least one characteristic of the audio signal; and determine for each of the plurality of high frequency band signals at least part of the low frequency portion which can represent the high frequency band signal. | 10-28-2010 |
20110010169 | Reduced-Complexity Vector Indexing and De-indexing - This invention relates to indexing an input vector contained in a set of vectors of a plurality of sets of vectors. The indexing comprises performing, in case that the input vector is contained in a set of vectors of a pre-defined group of one or more sets of vectors of the plurality of sets of vectors, a specific processing that is adapted to a characteristic of the sets of vectors in the pre-defined group of sets of vectors and is only applicable in case of input vectors contained in sets of vectors with the characteristic. The indexing further comprises performing, in case that the input vector is not contained in a set of vectors of the pre-defined group of sets of vectors, a general processing. The invention further relates to an according determining of a target vector contained in a set of vectors of a plurality of sets of vectors based on an index associated with said target vector. | 01-13-2011 |
20110093276 | APPARATUS - A method comprising receiving at a user equipment encrypted content. The content is stored in said user equipment in an encrypted form. At least one key for decryption of said stored encrypted content is stored in the user equipment. | 04-21-2011 |
20120232912 | Method, Apparatus and Computer Program Product for Audio Coding - The invention relates to a method and an apparatus in which samples of at least a part of an audio signal of a first channel and a part of an audio signal of a second channel are used to estimate a time delay between said part of the audio signal of said first channel and said part of the audio signal of said second channel. The method includes windowing the samples; performing a time-to-frequency domain transform; and determining an inter-channel time delay between said part of the audio signal of the first channel and said part of the audio signal of said second channel on the basis of the frequency domain representations. There is also disclosed a method and an apparatus for decoding the encoded samples. | 09-13-2012 |
20130346073 | AUDIO ENCODER/DECODER APPARATUS - Apparatus comprising a noise estimator configured to determine a noise estimate for a first part of an audio signal, a comparator configured to compare the noise estimate to an energy threshold parameter, a damping factor determiner configured to determine a damping factor for at least one sub band gain value of a second part of an audio signal, wherein the damping factor is dependent on a result of the comparison and a gain modifier configured to apply the damping factor to the sub band gain value. | 12-26-2013 |
20140052440 | CODING THROUGH COMBINATION OF CODE VECTORS - It is inter alia disclosed to determine a single code vector index based on combining at least two code vector indexes, each code vector index being associated with a code vector of a respective codebook. | 02-20-2014 |
20140258864 | AUDIO DRIVER USER INTERFACE - A method for an audio driver user interface comprising: capturing at least two audio signals ( | 09-11-2014 |
20140337741 | APPARATUS AND METHOD FOR AUDIO REACTIVE UI INFORMATION AND DISPLAY - A method includes determining, using signals captured from two or more microphones ( | 11-13-2014 |
20140379108 | VISUAL SPATIAL AUDIO - A method comprising: receiving at least one audio channel signal; receiving at least one user interface input; generating a visualisation of the at least one audio channel signal dependent on the at least one user interface input; and rendering the at least one audio channel signal to generate a rendered audio signal dependent on the at least one user interface input wherein the rendered audio channel signal is substantially synchronised with the visualisation of the at least one audio channel signal. | 12-25-2014 |
Patent application number | Description | Published |
20120128174 | Converting multi-microphone captured signals to shifted signals useful for binaural signal processing and use thereof - A method includes, for each of a number of subbands of a frequency range and for at least first and second frequency-domain signals that are frequency-domain representations of corresponding first and second audio signals: determining a time delay of the first frequency-domain signal that removes a time difference between the first and second frequency-domain signals in the subband. The method includes forming a first resultant signal including, for each of the number of subbands, a sum of one of the first or second frequency-domain signals shifted by the time delay and of the other of the first or second frequency-domain signals; and forming a second resultant signal including, for each of the number of subbands, a difference between the shifted one of the first or second frequency-domain signals and the other of the first or second frequency-domain signals. Apparatus and program products are also disclosed. | 05-24-2012 |
20130044884 | Apparatus and Method for Multi-Channel Signal Playback - Techniques are presented for creating multichannel output signals from input audio signals. A first signal is determined based on a number of subbands into which the input audio signals are divided and based at least in part on a directional estimation wherein the subbands having dominant sound source directions are emphasized relative to subbands having directional estimates that deviate from directional estimates of the dominant sound source directions. A second signal is determined based on the number of subbands wherein an ambient component is introduced to create a perception of an externalization for a sound image. A resultant audio signal is created using the first and second signals. The resultant audio signal is one of a number of multichannel signals. Additionally, it is determined whether binaural audio output or multichannel audio output (or both) is to be output, and the appropriate number of audio output signals are determined and output. | 02-21-2013 |
20130132845 | Spatial Visual Effect Creation And Display Such As For A Screensaver - Techniques are presented that include determining, using signals captured from two or more microphones configured to detect an acoustic signal from one or more sound sources, one or more prominent sound sources based on the one or more sound sources. The techniques also include determining one or more directions relative to a position of one or more of the two or more microphones for prominent sound source(s). The techniques further include outputting information suitable to be viewed on a display, the information providing for the prominent sound source(s) a visual effect indicating at least in part the one or more directions, relative to a position of one or more of the microphones, of the prominent sound source(s) in the acoustic signal. The information and the corresponding visual effect(s) may be presented on a display, e.g., as part of a screensaver. | 05-23-2013 |
20130202114 | Controllable Playback System Offering Hierarchical Playback Options - A first apparatus performs the following: determining, using at least two microphone signals corresponding to left and right microphone signals and using at least one further microphone signal, directional information of the left and right microphone signals; outputting a first signal corresponding to the left microphone signal; outputting a second signal corresponding to the right microphone signal; and outputting a third signal corresponding to the determined directional information. Another apparatus performs the following: performing at least one of the following: outputting first and second signals as stereo output signals; or converting the first and second signals to mid and side signals, and converting, using directional information for the first and second signals, the mid and side signals to at least one of binaural signals or multi-channel signals, and outputting the corresponding binaural signals or multi-channel signals. Additional apparatus, program products, and methods are disclosed. | 08-08-2013 |
20140029761 | Method and Apparatus for Microphone Beamforming - In accordance with an example embodiment of the present invention, an apparatus is disclosed. The apparatus includes a camera system and an optimization system. The optimization system is configured to communicate with the camera system. At least one microphone is connected to the optimization system. The optimization system is configured to adjust a beamform of the at least one microphone based, at least in part, on camera focus information of the camera system. | 01-30-2014 |
20140086414 | EFFICIENT AUDIO CODING HAVING REDUCED BIT RATE FOR AMBIENT SIGNALS AND DECODING USING SAME - An apparatus creates first data stream(s) by processing first audio signal(s) and creates second data stream(s) by processing second audio signal(s). The processing includes detecting phase information from at least one of the second audio signal(s) so as to eliminate the phase information. The second data stream(s) are created without the phase information from the at least one second audio signal. The first and second data streams are output. Another apparatus receives first data stream(s) including first audio signal(s) and receives second data stream(s) including second audio signal(s). The second audio signal(s) include at least one second audio signal where phase information has been eliminated. Phase information is detected from one of a selected first audio signal or a selected second audio signal and is added into the at least one second audio signal. Output audio is rendered using the first and second audio signal(s). | 03-27-2014 |
Patent application number | Description | Published |
20090313028 | METHOD, APPARATUS AND COMPUTER PROGRAM PRODUCT FOR PROVIDING IMPROVED AUDIO PROCESSING - An apparatus for performing improved audio processing may include a processor. The processor may be configured to divide respective signals of each channel of a multi-channel audio input signal into one or more spectral bands corresponding to respective analysis frames, select a leading channel from among channels of the multi-channel audio input signal for at least one spectral band, determine a time shift value for at least one spectral band of at least one channel, and time align the channels based at least in part on the time shift value. | 12-17-2009 |
20100014577 | METHOD AND APPARATUS FOR FAST NEAREST NEIGHBOR SEARCH FOR VECTOR QUANTIZERS - A method comprises identifying a component k of a codevector from a codebook C having one or more codevectors, the component k introducing highest variance for an input vector; allowing ordering of codevectors in the codebook C; and searching for a best match vector for the input vector using ordered codevectors. | 01-21-2010 |
20100115370 | METHOD AND APPARATUS FOR ERROR CONCEALMENT OF ENCODED AUDIO DATA - A method of frame error concealment in encoded audio data comprises receiving encoded audio data in a plurality of frames; and using saved one or more parameter values from one or more previous frames to reconstruct a frame with frame error. Using the saved one or more parameter values comprises deriving parameter values based at least part on the saved one or more parameter values and applying the derived values to the frame with frame error. | 05-06-2010 |
20110016077 | AUDIO SIGNAL CLASSIFIER - An apparatus for classifying an audio signal configured to: estimate at least one shaping parameter value for a plurality of samples of the audio signal; generate at least one audio signal classification value by mapping the at least one shaping parameter value to one of at least two interval estimates; and determine at least one audio signal classification decision based on the at least one audio signal classification value. | 01-20-2011 |
20120134511 | MULTICHANNEL AUDIO CODER AND DECODER - An apparatus configured to: determine at least one time delay between a first signal and a second signal; generate a third signal from the second signal dependent on the at least one time delay; and combine the first and third signal to generate a fourth signal; divide the first and second signals into a plurality of time frames; determine for each time frame a first delay associated with a start of the time frame of the first signal and a second time delay associated with an end of the time frame of the first signal; select from the second signal at least one sample in a block defined as starting at the combination of the start of the time frame and the first time delay and finishing at the combination of the end of the time frame and the second time delay; and stretch the selected at least one sample to equal the number of samples of the first frame. | 05-31-2012 |
20120197649 | Audio Coding - A method for encoding an audio signal including: processing a selected subset of a lower series of samples forming a lower frequency spectral band of the audio signal and a higher series of samples forming a higher frequency spectral band of the audio signal to parametrically encode the higher series of samples forming the higher frequency spectral band by identifying a sub-series of the lower series of samples. | 08-02-2012 |
20130226598 | AUDIO ENCODER OR DECODER APPARATUS - An apparatus comprising at least one processor and at least one memory including computer program code the at least one memory and the computer program code configured to, with the at least one processor, cause the apparatus at least to perform: determining from an audio signal at least a first part and a second part; encoding the first part of the audio signal with a first encoder for generating a first encoded audio signal; encoding the second part of the audio signal with a second encoder configured to generate a second encoded audio signal comprising for a first section of the second part an indicator to at least part of the first part of the audio signal; and determining the first section of the second part of the audio signal such that the first encoded audio signal and second encoded audio signal is within a defined encoding efficiency parameter. | 08-29-2013 |
20130238346 | LOW COMPLEXITY TARGET VECTOR IDENTIFICATION - It is inter alia disclosed to identify one or more target vectors from a plurality of candidate vectors, each candidate vector having sorted elements and being associated with a respective class of one or more code vectors of a codebook and at least one of the candidate vectors being associated with a respective class of two or more code vectors that comprise the respective candidate vector and at least one code vector obtainable from the respective candidate vector by one of permutation and signed permutation, the target vectors having, among all candidate vectors of the plurality of candidate vectors, smallest distances towards a at least sorted representation of an input vector. The identifying comprises checking, for a candidate vector of the plurality of candidate vectors, at least based on a distance between the candidate vector and a reference vector and on a distance between the reference vector and the at least sorted representation of the input vector, if a distance between the at least sorted representation of the input vector and the candidate vector is larger than a distance between the at least sorted representation of the input vector and the reference vector. The identifying further comprises computing, for the candidate vector, the distance between the at least sorted representation of the input vector and the candidate vector only if the checking yields a negative result. | 09-12-2013 |
20130246076 | CODING OF STRINGS - It is inter alia disclosed to apply a function on a string in accordance with a rule of a set of rules, the string comprising first and second representatives, wherein the function ensures that the string comprises at least one of a predetermined representative at an end of the string after the function has been applied; and to determine a representation of the string, wherein said representation comprises at least one encoded representative, each of said at least one encoded representative being associated with at least one representative of the string, wherein said representation does not comprise an encoded representative being associated with at least one of the at least one predetermined representative at the end of the string. | 09-19-2013 |
20140114653 | PITCH ESTIMATOR - An apparatus comprising an analysis window definer configured to define at least one analysis window for a first audio signal, wherein the at least one analysis window definer is configured to be dependent on the first audio signal and a pitch estimator configured to determine a first pitch estimate for the first audio signal, wherein the pitch estimator is dependent on the first audio signal sample values within the analysis window. | 04-24-2014 |
20140129216 | MULTIPLE SCALE CODEBOOK SEARCH - It is inter alia disclosed to determine, for each set of basis code vectors of a plurality of sets of basis code vectors, a potential basis code vector for encoding an input vector, wherein each set of basis code vectors is associated with at least one scale representative of a plurality of scale representatives, and to determine a code vector for encoding the input vector from a subset of code vectors, said subset of code vectors comprising, for each determined potential basis code vector and each scale representative associated with the set of basis code vectors of the respective potential basis code vector, a code vector based on the respective potential basis code vector scaled by the respective scale representative. | 05-08-2014 |
20140270282 | MULTICHANNEL AUDIO CALIBRATION METHOD AND APPARATUS - A method comprising: generating at least one audio signal to be output by at least one speaker for a multi-speaker system; receiving at least two output signals, the at least two output signals provided by at least two microphones and based on the at least one acoustic wave output by the at least one speaker in response to the at least one audio signal; determining a directional component associated with the at least two output signals; and comparing the directional component with an expected location of the at least one speaker. | 09-18-2014 |
20140359450 | ACTIVATING A SELECTION AND A CONFIRMATION METHOD - An apparatus, method, and computer program product for: receiving an indication of a pre-defined gesture detected by a motion tracking device, in response to receiving the indication of the detected pre-defined gesture, activating a selection method, wherein the selection method is dependent on motion detected by the motion tracking device, and activating a confirmation method for confirming a selection, wherein the confirmation method is independent of motion detected by the motion tracking device. | 12-04-2014 |
20140376728 | AUDIO SOURCE PROCESSING - It is inter alia disclosed to check whether an audio signal captured from an environment of the apparatus comprises arriving sound from an audio source of interest, and to provide a direction identifier being indicative on the direction of the arriving sound from the audio source of interest via a user interface when said check yields a positive result. | 12-25-2014 |
20150016641 | AUDIO PROCESSING APPARATUS - An apparatus comprising: a spatial audio analyser configured to determine, using at least one audio signal, at least one acoustic source; a location determiner configured to determining at least one point of interest location associated with the at least one acoustic source; a trajectory determiner configured to determine a trajectory of the at least one point of interest location associated with the at least one acoustic source; and a processor configured to reproduce the at least one audio signal from at least one sound playback transducer based on the determined trajectory. | 01-15-2015 |
20150077421 | CREATING A CINEMAGRAPH - An apparatus receives first image data that is based on image data captured by a first camera and second image data that is based on image data captured by a second camera. The apparatus then creates a cinemagraph using the first image data for a static part of the cinemagraph and using the second image data for an animated part of the cinemagraph. Another apparatus could provide at least one of the first and second image data based on a detected corresponding element. | 03-19-2015 |