Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: There is inter alia a method comprising: receiving a request to change the coding rate of a multimode audio codec; determining that the request corresponds to a coding rate of another mode of operation of the multimode audio codec; determining a frame of an input audio signal of the multimode audio codec to be an active region of the audio signal; maintaining a current operating mode of the multimode audio codec; and reducing the coding rate of the multimode audio codec to a coding rate lower than the requested coding rate.

Abstract: An apparatus comprising: a channel analyser configured to determine at least one set of parameters defining a difference between at least two audio signal channels; a value analyser configured to analyse the at least one set of parameters to determine an initial trend; a mapper configured to map instances of the at least one set of parameters according to a first mapping to generate mapped instances with associated order position instances based on the initial trend; and an encoder configured to encode the mapped instances based on the order position of the mapped instances.

Abstract: It is inter alia disclosed to quantise a vector of a plurality of coefficients using a predictive mode of operation of a vector quantiser, wherein the vector quantiser can operate in either a predictive mode of operation or a non-predictive mode of operation, determine a vector of a plurality of recovered coefficients; compare the vector of the plurality of coefficients to the vector of the plurality of recovered coefficients; and determine the mode of operation of the vector quantiser for a vector of a plurality of coefficients associated with a subsequent frame of audio samples, wherein the mode of operation is dependent on the comparison.

Abstract: It is inter alia disclosed to generate a signal representation at least based on a noise reduced component from a signal and on a noise component from the signal, said signal representation comprising at least two channel representations.

Abstract: 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.

Abstract: It is inter alia disclosed to receive a set of encoded audio parameters for an audio frame, wherein the set comprises indices representing at least two quantized line spectral frequency coefficients, wherein the audio frame when decoded comprises audio samples digitally sampled at a sampling frequency, wherein the sampling frequency is one of a plurality of sampling frequencies for an audio decoder; to convert the indices to the at least two quantized line spectral frequency coefficients; and to determine the sampling frequency for the audio frame by checking the value of a highest order quantized line spectral frequency coefficient of the at least two quantized line spectral frequency coefficients.

Abstract: 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.

Abstract: 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.

Abstract: Methods, apparatuses, and computer program products are provided to indicate or automatically configure headphone channel orientation based on a physical orientation determination. An apparatus is provided that is configured to at least determine an orientation of the headphone device; analyze the determined orientation; and provide an indication of the determined orientation or adjust the output channel configuration of the apparatus for the headphone device. The apparatus may be further configured to determine the orientation of the headphone device based on at least one of: a head turn position; a direction of one or more audio signals; a direction of movement, wherein the movement is determined based on a determination of acceleration or trajectory of the headphone device; two or more compass data, wherein at least one compass is located in each of the apparatus and the headphone device; and a difference in characteristics of one or more audio signals.

Abstract: A method, apparatus computer program product are provided to facilitate the utilization of the spatial position of audio signals in order to improve voice quality. In the context of a method, a main mono signal is determined from one or more audio signals that were received. The method also includes determining one or more ambience signals from the one or more audio signals that were received, such as following removal of the main mono signal therefrom. The method also adjusts at least one of a virtual position of the main mono signal for provision to a recipient device or the one or more ambience signals for provision to the recipient device.

Abstract: 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.

Abstract: An apparatus comprising: a coding rate determiner configured to determine a first coding bitrate for at least one first frame audio signal multi-channel parameter and a second coding bitrate for at least one second frame audio signal multi-channel parameter, wherein the combined first and second coding bitrate is less than a bitrate limit; a channel analyser configured to determine for a first frame the at least one first frame audio signal multi-channel parameter and configured to determine for a second frame the at least one second frame audio signal multi-channel parameter; a multi-channel parameter determiner configured to generate an encoded first frame audio signal multi-channel parameter within the first coding bitrate from the at least one first frame audio signal multi-channel parameter and configured to generate an encoded at least one second frame audio signal parameter within the second coding bitrate from the at least one second frame audio signal multi-channel parameter; and a multiplexer config

Abstract: 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.

Abstract: 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.

Abstract: A method, apparatus and computer program product for changing a viewing angle of a video image. An indication to change a viewing angle of a first video image of a subject may be received, and in response, a second video image of the subject, captured from a different angle, is displayed. The indication is detected by user input such as selection of an area of an image, movement of a mobile device, or detection of a user's gaze. Display adjustments may be made by zooming and cropping, and audio adjustments may be made by changing a volume associated with an area of an image, allowing for a customizable viewing experience.

Abstract: 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.

Abstract: 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.