Nokia Technologies Oy

Tapani Pihlajakuja

Antti Johannes Eronen

Arto Juhani Lehtiniemi

Lasse Juhani Laaksonen

Jussi Leppanen

Adriana Vasilache

Mikko-Ville Laitinen

Mikko-ville Laitinen

Juha Vilkamo

Kari Juhani Jarvinen

Anssi Rämö

Miikka Tapani Vilermo

Jussi Leppänen

Jussi Artturi Leppänen

Anssi Ramo

Archontis Politis

Tapio Lokki

Otto Puomio

Juha Tapio Vilkamo

Mikko-Ville Ilari Laitinen

An apparatus comprising means configured to: obtain at least one audio signal; obtain, for the at least one audio signal, spatial audio signal parameter values, the spatial audio signal parameters values distributed within a time-frequency domain (); determine a merge metric to control a merging of the spatial audio signal parameter values over the time-frequency domain (); and merge (), based on the merge metric (), the spatial audio signal parameter values to a smaller number of spatial audio signal parameter values overtime and/or frequency within the time-frequency domain.

Spatial audio parameter encoding and associated decoding

An apparatus comprising means configured to: obtain at least one parameter value () associated with at least two time-frequency parts of at least one audio signal (); obtain at least one similarity value based on the at least one parameter value () associated with the at least two time-frequency parts of at least one audio signal (); determine at least one group of time-frequency parts from the at least two time-frequency parts of at least one audio signal (), the at least one group of time-frequency parts based on the at least one similarity value; and generate for the at least one group of time-frequency parts at least one associated group parameter (), the at least one group parameter () based on the at least one parameter value () associated with the time-frequency parts.

An apparatus comprising means configured to: obtain at least one direction parameter value for a time-frequency part of at least one audio signal (); obtain at least one energy ratio for the time-frequency part (), wherein each energy ratio is associated with a respective direction parameter value; generate respective at least one modified energy ratio from the at least one energy ratio for the time-frequency part (); determine a quantization spatial resolution for encoding the at least one obtained direction parameter value based on the at least one modified energy ratio (); and encode the obtained direction parameter values based on the quantization spatial resolution ().

An apparatus comprising means configured to: obtain at least one impulse response; obtain at least one reflection filter based on the obtained at least one impulse response, wherein the at least one reflection filter is configured to determine at least one early reflection from an acoustic surface which is not overlapped in time by any other reflection, wherein a duration of the at least one early reflection is shorter than a duration of the obtained at least one impulse response. In addition, an apparatus comprising means configured to: obtain at least one impulse response, wherein the at least one impulse response is configured with a perceivable timbre during rendering; create a timbral modification filter; obtain at least one audio signal; and render at least one output audio signal based on the at least one audio signal, wherein the at least one output signal is based on an application of the timbral modification filter.

Rendering reverberation

An apparatus comprising means for: obtaining at least one audio signal; obtaining at least one parameter respectively for each of at least two frequency bands associated with the at least one audio signal; and selecting a frequency band of the at least two frequency bands based on comparing at least one further respective parameter for each of the at least two frequency bands wherein the at least one further respective parameter is determined from each of the at least two frequency bands; generating an output comprising a selection of the at least one parameter associated with the selected frequency band of the at least two frequency bands, such that the selection of the at least one parameter associated with the selected frequency band is configured to reduce a bitrate or size of the output and wherein the at least one parameter of the selected frequency band is configured to represent respective parameters of the at least two frequency bands.

Spatial parameter signalling

There is inter alia disclosed an apparatus for spatial audio encoding comprising: means for determining a first spatial audio parameter of a frequency sub band of one or more audio signals and a second spatial audio parameter of the frequency sub band of the one or more audio signals; and means for combining the first spatial audio parameter and the second spatial audio parameter to provide a combined spatial audio parameter for the frequency sub band.

Combining of spatial audio parameters

There is inter alia disclosed an apparatus for spatial audio encoding comprising: means for determining at least two of a type of spatial audio parameter for one or more audio signals, wherein a first of the type of spatial audio parameter is associated with a first group of samples in a domain of the one or more audio signals and a second of the type of spatial audio parameter is associated with a second group of samples in the domain of the one or more audio signals; and means for merging the first of the type of spatial audio parameter and the second of the type of spatial audio parameter into a merged spatial audio parameter.

Merging of spatial audio parameters

An apparatus for generating at least one distance estimate to at least one sound source within a sound scene comprising the least one sound source, the apparatus configured to: receive at least two audio signals from a microphone array located within the sound scene; receive at least one further audio signal associated with the at least one sound source; determine at least one portion of the at least two audio signals from a microphone array corresponding to the at least one further audio signal associated with the at least one sound source; determine a distance estimate to the at least one sound source based on the at least one portion of the at least two audio signals from a microphone array corresponding to the at least one further audio signal associated with the at least one sound source.

Sound source distance estimation

A method comprising: obtaining a first audio direction parameter value for each sub-band of a sub-frame of a frame of an audio signal; obtaining a second audio direction parameter value for the sub-frame of the frame of the audio signal for one or more audio objects associated with said audio signal; and determining a bit-efficient encoding for each first audio direction parameter value of the sub-frame based on a similarity between the first audio direction parameter value for each sub-band and the second audio direction parameter values for the one or more audio objects.

An apparatus () comprising means configured to: obtain at least one audio signal (); determine at least one direction parameter () of at least one propagating sound associated with the at least one audio signal (); determine at least one direction () of at least one sound source associated with the at least one audio signal (); modify the at least one direction parameter () in accordance with the determined at least one direction (); and output the modified at least one direction parameter ().

Direction estimation enhancement for parametric spatial audio capture using broadband estimates

A method including: obtaining at least two audio signals for reproduction, each of the at least two audio signals associated with a respective one of at least two reproduction locations within an audio reproduction space; obtaining within the audio reproduction space at least two zones; obtaining at least one location for a user's position within the audio reproduction space, the at least one location being relative to at least one of the at least two zones and the at least two reproduction locations; and processing the at least two audio signals based on the obtained at least one location for the user's position within the audio reproduction space to generate at least one output audio signal, the at least one output audio signal is reproduced from at least one of the at least two reproduction locations.

Presentation of premixed content in 6 degree of freedom scenes

An apparatus may be configured to: obtain media content, wherein the media content comprises at least one audio content; obtain priority content information, the priority content information comprising a priority identification identifying and classifying the at least one audio content; determine to at least partially reduce rendering of the at least one audio content based, at least partially, on a quota associated with the priority identification of the at least one audio content; and render the at least one audio content based, at least partially, on the priority content information and the determining.

Spatial augmentation

Examples of the disclosure relate to apparatus, methods and computer programs for encoding spatial metadata. The example apparatus includes circuitry configured for obtaining spatial metadata associated with spatial audio content and obtaining a configuration parameter indicative of a source format of the spatial audio content. The circuitry is also configured to use the configuration parameter to select a method of compression of the spatial metadata associated with the spatial audio content.

Apparatus, methods, and computer programs for encoding spatial metadata

An apparatus including circuitry configured for determining for at least one first audio signal of an audio signal format, at least one metadata parameter; determining for at least one further audio signal of a further audio signal format; at least one further metadata parameter; controlling combining of the at least one metadata parameter with the at least one further metadata parameter to generate a combined metadata, wherein the combined metadata is configured to be associated with a combined audio signal formed from the at least one first audio signal and the at least one further audio signal in such a way that the combined metadata includes at least one spatial audio parameter.

Spatial audio parameter merging

According to an example embodiment, a technique for spatial audio processing including: determining at least one spatial parameter based, at least partially, on at least one input audio signal captured with at least one first device, configured to represent at least a portion of an audio scene; identifying a portion of interest of the audio scene based, at least partially, on the at least one spatial parameter; generating at least one first audio signal based, at least partially, on the at least one input audio signal; generating at least one second audio signal based, at least partially, on at least one audio signal captured with at least one second device; and combining, at least partially, the at least one first audio signal and the at least one second audio signal into at least one combined audio signal.

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Vantaa, Finland

Tapani Pihlajakuja