Abstract: There is herein provided a method comprising capturing spatial audio signals by a plurality of microphones using a first capture setting and generating a set of audio encoder input format data comprising a representation of the spatial audio signals and associated metadata, the metadata including, in part, a set of descriptive metadata indicative of one or more capture parameters associated with the first capture setting. The method further comprises providing the set of audio encoder input format data to an audio encoder for encoding the representation of the spatial audio signals and the associated metadata to a bitstream for a current streaming session and transmitting the bitstream to one or more remote devices for rendering the representation of the spatial audio signals based, at least in part, on the set of descriptive metadata.

Abstract: According to various, but not necessarily all, embodiments there is provided an apparatus comprising means for: determining a direction of arrival of sound from a sound source relative to a user device using at least one captured audio signal; controlling an angle of orientation of visual information displayed on a display, wherein the angle of orientation of the visual information is at least partially dependent upon the determined direction of arrival of sound from the sound source relative to the user device.

Abstract: An apparatus (317) comprising means configured to: receive a spatial audio signal, the spatial audio signal comprising at least one audio signal and spatial metadata (122) associated with the at least one audio signal; generate a mixing value (320) based on the spatial metadata (122) and a predefined parameter (322) which imparts effects of a rendering of a multichannel audio signal having a multichannel configuration to a further multichannel audio signal having a further multichannel configuration on generated output signals; and generating the output audio signals having the further multichannel configuration based on the mixing value (320) and the spatial audio signal.

Abstract: There is inter alia disclosed an apparatus for spatial audio encoding configured to determining an audio scene separation metric between an input audio signal and a further input audio signal. and using the audio scene separation metric for quantizing of at least one spatial audio parameter of the input audio signal.

Abstract: A method comprising determining that an orientation of a mobile device is a flat orientation, determining a context of the mobile device, determining movement of the mobile device, and based on the orientation, context and movement of the device, determining orientation of visual content rendered on a display of the mobile device.

Abstract: According to various, but not necessarily all, embodiments there is provided an apparatus comprising means for: determining a direction of arrival of sound from a sound source relative to a user device using at least one captured audio signal; controlling an angle of orientation of visual information displayed on a display, wherein the angle of orientation of the visual information is at least partially dependent upon the determined direction of arrival of sound from the sound source relative to the user device.

Abstract: A method comprising determining that an orientation of a mobile device is a flat orientation, determining a context of the mobile device, determining movement of the mobile device, and based on the orientation, context and movement of the device, determining orientation of visual content rendered on a display of the mobile device.

Abstract: An apparatus for spatial audio signal encoding, the apparatus comprising at least one processor and at least one memory including a 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, for two or more audio signals, at least one spatial audio parameter for providing spatial audio reproduction, the at least one spatial audio parameter comprising a direction parameter with an elevation and an azimuth component; define a spherical grid generated by covering a sphere with smaller spheres, wherein the centres of the smaller spheres define points of the spherical grid; and convert the elevation and azimuth component of the direction parameter to an index value based on the defined spherical grid.

Abstract: An apparatus for spatial audio signal encoding, the apparatus comprising at least one processor and at least one memory including a 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, for two or more audio signals, at least one spatial audio parameter for providing spatial audio reproduction, the at least one spatial audio parameter comprising a direction parameter with an elevation and an azimuth component; define a spherical grid generated by covering a sphere with smaller spheres, the smaller spheres arranged in circles of spheres wherein a first circle of spheres comprises one of the smaller spheres located with a centre at an elevation of 90 degrees relative to a reference direction of the sphere; and convert the elevation and azimuth component of the direction parameter to an index value based on the defined spherical grid.

Abstract: An apparatus for spatial audio signal encoding, the apparatus comprising at least one processor and at least one memory including a 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, for two or more audio signals, at least one spatial audio parameter for providing spatial audio reproduction, the at least one spatial audio parameter comprising a direction parameter with an elevation and an azimuth component; define a spherical grid generated by covering a sphere with smaller spheres, the smaller spheres arranged in circles of spheres wherein a first circle of spheres comprises one of the smaller spheres located with a centre at an elevation of 90 degrees relative to a reference direction of the sphere; and convert the elevation and azimuth component of the direction parameter to an index value based on the defined spherical grid.

Abstract: An apparatus for spatial audio signal encoding, the apparatus comprising at least one processor and at least one memory including a 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, for two or more audio signals, at least one spatial audio parameter for providing spatial audio reproduction, the at least one spatial audio parameter comprising a direction parameter with an elevation and an azimuth component; define a spherical grid generated by covering a sphere with smaller spheres, wherein the centres of the smaller spheres define points of the spherical grid; and convert the elevation and azimuth component of the direction parameter to an index value based on the defined spherical grid.

Abstract: It is inter alia disclosed to determine a first quantized representation of an input vector, and to determine a second quantized representation of the input vector based on a codebook depending on the first quantized representation.

Abstract: Phase effect interference is determined at a listening location between signals from at least two audio objects; and a modified position is computed for at least one of the audio objects such that the determined phase effect interference at the listening location is altered as a result of the modified position. For each audio object for which the position is modified at least phase of at least one frequency component of the respective signal is adjusted in correspondence with the modified position so as to eliminate the determined phase effect interference. The signals from the at least two audio objects are formed after this adjusting; and then the formed signals are provided to a sound system comprising multiple audio transducers so as to render the formed signals at the listening position where the phase effect interference is eliminated during rendering.

Abstract: A method comprising: receiving lattice vector quantised parameter data, the parameter data representing at least one audio signal; determining within the data at least one bit error; and controlling the decoding of the data to generate an audio signal based on the determining of the bit error.

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 including determining a plurality of band energy scale values for a pair of audio signals; transforming the band energy scale values using a discrete cosine transform to generate a plurality of coefficient values; and selecting a sub-set of the plurality of coefficient values to generate a representation of a level difference between the pair of audio signals.

Abstract: An apparatus comprising: a channel analyzer configured to determine for a first frame of at least one audio signal a set of first frame audio signal multi-channel parameters; a multichannel parameter selector configured to select for the first frame a sub-set of the set of first frame audio signal multi-channel parameters based on a value associated with the first frame; and a multichannel parameter encoder configured to generate an encoded first frame audio signal multi-channel parameter based on the selected sub-set of the set of first frame audio signal multi-channel parameters.

Abstract: A method comprising: receiving lattice vector quantised parameter data, the parameter data representing at least one audio signal; determining within the data at least one bit error; and controlling the decoding of the data to generate an audio signal based on the determining of the bit error.

Abstract: Phase effect interference is determined at a listening location between signals from at least two audio objects; and a modified position is computed for at least one of the audio objects such that the determined phase effect interference at the listening location is altered as a result of the modified position. For each audio object for which the position is modified at least phase of at least one frequency component of the respective signal is adjusted in correspondence with the modified position so as to eliminate the determined phase effect interference. The signals from the at least two audio objects are formed after this adjusting; and then the formed signals are provided to a sound system comprising multiple audio transducers so as to render the formed signals at the listening position where the phase effect interference is eliminated during rendering.

Abstract: It is inter alia disclosed to quantize a vector of a plurality of coefficients using a predictive mode of operation of a vector quantizer, wherein the vector quantizer 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 quantizer 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.