Fraunhofer-gesellschaft Zur Foerderung Der Angewandten Forschung E.v.

Dolby International Ab

Dolby Laboratories Licensing Corporation

Leon Terentiv

Oliver Hellmuth

Jouni Paulus

Juergen Herre

Harald Fuchs

Sascha Disch

Adrian Murtaza

Falko Ridderbusch

Daniel Fischer

Christof Fersch

Bernhard Grill

Jurgen Herre

Cornelia Falch

Thorsten Kastner

Heiko Purnhagen

Johannes Hilpert

Jonas Engdegard

Jürgen Herre

Roberta Camilleri

Gregory John McGarry

Andreas Hoelzer

Panji Setiawan

Andreas Hölzer

Described is a method of processing position information indicative of an object position of an audio object, wherein the object position is usable for rendering of the audio object, that comprises: obtaining listener orientation information indicative of an orientation of a listener's head; obtaining listener displacement information indicative of a displacement of the listener's head; determining the object position from the position information; modifying the object position based on the listener displacement information by applying a translation to the object position; and further modifying the modified object position based on the listener orientation information. Further described is a corresponding apparatus for processing position information indicative of an object position of an audio object, wherein the object position is usable for rendering of the audio object.

Methods, apparatus and systems for three degrees of freedom (3DOF+) extension of MPEG-H 3D audio

A multi-channel audio decoder for providing at least two output audio signals on the basis of an encoded representation is configured to render a plurality of decoded audio signals, which are obtained on the basis of the encoded representation, in dependence on one or more rendering parameters, to obtain a plurality of rendered audio signals. The multi-channel audio decoder is configured to derive one or more decorrelated audio signals from the rendered audio signals, and to combine the rendered audio signals, or a scaled version thereof, with the one or more decorrelated audio signals, to obtain the output audio signals. A multi-channel audio encoder provides a decorrelation method parameter to control an audio decoder.

Multi-channel audio decoder, multi-channel audio encoder, methods, computer program and encoded audio representation using a decorrelation of rendered audio signals

The present disclosure relates to a method of processing audio content including directivity information for at least one sound source, the directivity information comprising a first set of first directivity unit vectors representing directivity directions and associated first directivity gains. The disclosure further relates to corresponding methods of encoding and decoding audio content including directivity information for at least one sound source.

Methods, apparatus and systems for representation, encoding, and decoding of discrete directivity data

Described herein is a method of processing audio content for rendering in a three-dimensional audio scene, wherein the audio content comprises a sound source at a source position, the method comprising: obtaining a voxelized representation of the three-dimensional audio scene, wherein the voxelized representation indicates volume elements in which sound can propagate and volume elements by which sound is occluded; generating a two-dimensional projection map for the audio scene based on the voxelized representation by applying a projection operation to the voxelized representation that projects onto a horizontal plane; and determining parameters indicating a virtual source position of a virtual sound source based on the source position, a listener position, and the projection map, to simulate, by rendering a virtual source signal from the virtual source position, an impact of acoustic diffraction by the three-dimensional audio scene on a source signal of the sound source at the source position. Described are moreover a corresponding apparatus as well as corresponding computer program products.

Methods, apparatus and systems for diffraction modelling based on grid pathfinding

A method () for rendering an audio signal in a virtual reality rendering environment () is described. The method () comprises rendering () an origin audio signal of an audio source () from an origin source position on an origin sphere () around an origin listening position () of a listener (). Furthermore, the method () comprises determining () that the listener () moves from the origin listening position () to a destination listening position (). In addition, the method () comprises determining () a destination source position of the audio source () on a destination sphere () around the destination listening position () based on the origin source position, and determining () a destination audio signal of the audio source () based on the origin audio signal. Furthermore, the method () comprises rendering () the destination audio signal of the audio source () from the destination source position on the destination sphere () around the destination listening position ().

Method and system for handling local transitions between listening positions in a virtual reality environment

Described herein is a method for generating a modified bitstream on a source device, wherein the method includes the steps of: a) receiving, by a receiver, a bitstream including coded media data; b) generating, by an embedder, payload of additional media data and embedding the payload in the bitstream for obtaining, as an output from the embedder, a modified bitstream including the coded media data and the payload of the additional media data; and d) outputting the modified bitstream to a sink device. Described is further a method for processing said modified bitstream on a sink device. Described are moreover a respective source device and sink device as well as a system of a source device and a sink device and respective computer program products.

Methods and devices for generation and processing of modified bitstreams

A method () for rendering audio in a virtual reality rendering environment () is described. The method () comprises rendering () an origin audio signal of an origin audio source () of an origin audio scene () from an origin source position on a sphere () around a listening position () of a listener (). Furthermore, the method () comprises determining () that the listener () moves from the listening position () within the origin audio scene () to a listening position () within a different destination audio scene (). In addition, the method () comprises applying () a fade-out gain to the origin audio signal to determine a modified origin audio signal, and rendering () the modified origin audio signal of the origin audio source () from the origin source position on the sphere () around the listening position ().

Method and system for handling global transitions between listening positions in a virtual reality environment

The present disclosure relates to methods, apparatus and systems for encoding an audio signal into a bitstream, in particular at an encoder, comprising: encoding or including audio signal data associated with 3DoF audio rendering into one or more first bitstream parts of the bitstream, and encoding or including metadata associated with 6DoF audio rendering into one or more second bitstream parts of the bitstream. The present disclosure further relates to methods, apparatus and systems for decoding an audio signal and audio rendering based on the bitstream.

Methods, apparatus and systems for 6DOF audio rendering and data representations and bitstream structures for 6DOF audio rendering

Described herein is a method for generating a modified bitstream on a source device, wherein the method includes the steps of: a) receiving, by a receiver, a bitstream including coded media data; b) generating, by an embedder, payload of additional media data and embedding the payload in the bitstream for obtaining, as an output from the embedder, a modified bitstream including the coded media data and the payload of the additional media data; and c) outputting the modified bitstream to a sink device. Described is further a method for processing said modified bitstream on a sink device. Described are moreover a respective source device and sink device as well as a system of a source device and a sink device and respective computer program products.

Methods and devices for generation and processing of modified audio bitstreams

Methods, apparatus and systems for three degrees of freedom (3DoF+) extension of MPEG-H 3D audio

A decoder for generating an audio output signal having one or more audio output channels is provided, having a receiving interface for receiving an audio input signal having a plurality of audio object signals, for receiving loudness information on the audio object signals, and for receiving rendering information indicating whether one or more of the audio object signals shall be amplified or attenuated, further having a signal processor for generating the one or more audio output channels of the audio output signal, configured to determine a loudness compensation value depending on the loudness information and depending on the rendering information, and configured to generate the one or more audio output channels of the audio output signal from the audio input signal depending on the rendering information and depending on the loudness compensation value. One or more by-pass audio object signals are employed for generating the audio output signal. Moreover, an encoder is provided.

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Erlangen, Germany

Leon Terentiv