Dolby Laboratories Licensing Corporation

Thomson Licensing

Siemens Aktiengesellschaft

Areva Np Gmbh

Siemens Enterprise Communications Gmbh & Co. Kg

Framatome Anp Gmbh

Dolby International Ab

Unify Gmbh Co. Kg

Areva Gmbh

Interdigital Madison Patent Holdings

Peter Jax

Johannes Boehm

Sven Kordon

Oliver Wuebbolt

William Redmann

Alexander Krueger

William Gibbens Redmann

Klaus Ruthrof

Florian Keiler

Stefan Schandl

Walter Knoblach

Herve Taddei

Bernd Geiser

Bela Bechtold

Johann-Markus Batke

Peter Vary

Wolfgang Issel

Jan Zach

Karl-Heinz Bode

Klaus Gunther

Vojtech Ocelik

Klaus Franze

Meinolf Blawat

Klaus Gaedke

Ingo Huetter

Oliver Wübbolt

Alexander Krüger

Martin Gartner

Johannes Böhm

Olivier Wuebbolt

Aulis Telle

Dieter Wiemerslage

Heinrich Lompe

Wilhelm Leuker

Hervé Taddei

A method for generating loudspeaker signals associated with a target screen size is disclosed. The method includes receiving a bit stream containing encoded higher order ambisonics signals, the encoded higher order ambisonics signals describing a sound field associated with a production screen size. The method further includes decoding the encoded higher order ambisonics signals to obtain a first set of decoded higher order ambisonics signals representing dominant components of the sound field and a second set of decoded higher order ambisonics signals representing ambient components of the sound field. The method also includes combining the first set of decoded higher order ambisonics signals and the second set of decoded higher order ambisonics signals to produce a combined set of decoded higher order ambisonics signals.

Method and apparatus for screen related adaptation of a higher-order ambisonics audio signal

Conventional audio compression technologies perform a standardized signal transformation, independent of the type of the content. Multi-channel signals are decomposed into their signal components, subsequently quantized and encoded. This is disadvantageous due to lack of knowledge on the characteristics of scene composition, especially for e.g. multi-channel audio or Higher-Order Ambisonics (HOA) content. A method for decoding an encoded bitstream of multi-channel audio data and associated metadata is provided, including transforming the first Ambisonics format of the multi-channel audio data to a second Ambisonics format representation of the multi-channel audio data, wherein the transforming maps the first Ambisonics format of the multi-channel audio data into the second Ambisonics format representation of the multi-channel audio data. A method for encoding multi-channel audio data that includes audio data in an Ambisonics format, wherein the encoding includes transforming the audio data in an Ambisonics format into encoded multi-channel audio data is also provided.

Methods, apparatus and systems for encoding and decoding of multi-channel Ambisonics audio data

Method and apparatus for screen related adaptation of a Higher-Order Ambisonics audio signal

Methods, apparatus and systems for encoding and decoding of multi-channel ambisonics audio data

The present invention is directed to apparatus and methods for decoding Higher Order Ambisonics (HOA) audio signals. HOA audio signals may be decompressed based on perceptual decoding to determine at least an HOA representation corresponding to the HOA audio signals. A rotated transform may be determined based on a rotation of a spherical sample grid. A rotated HOA representation may be determined based on the rotated transform and the HOA representation. The rotated HOA representation may be rendered to output to a loudspeaker setup.

Methods and apparatus for encoding and decoding multi-channel HOA audio signals

Conventional audio compression technologies perform a standardized signal transformation, independent of the type of the content. Multi-channel signals are decomposed into their signal components, subsequently quantized and encoded. This is disadvantageous due to lack of knowledge on the characteristics of scene composition, especially for e.g. multi-channel audio or Higher-Order Ambisonics (HOA) content. A method for decoding an encoded bitstream of multi-channel audio data and associated metadata is provided, including transforming the first Ambisonics format of the multi-channel audio data to a second Ambisonics format representation of the multi-channel audio data, wherein the transforming maps the first Ambisonics format of the multi-channel audio data into the second Ambisonics format representation of the multi-channel audio data. A method for encoding multi-channel audio data that includes audio data in an Ambisonics format, wherein the encoding includes transforming the encoded multi-channel audio data into a second format encoded multi-channel audio data is also provided.

Methods, apparatus and systems for encoding and decoding of multi-channel audio data

Conventional audio compression technologies perform a standardized signal transformation, independent of the type of the content. Multi-channel signals are decomposed into their signal components, subsequently quantized and encoded. This is disadvantageous due to lack of knowledge on the characteristics of scene composition, especially for e.g. multi-channel audio or Higher-Order Ambisonics (HOA) content. An improved method for encoding pre-processed audio data comprises encoding the pre-processed audio data, and encoding auxiliary data that indicate the particular audio pre-processing. An improved method for decoding encoded audio data comprises determining that the encoded audio data had been pre-processed before encoding, decoding the audio data, extracting from received data information about the pre-processing, and post-processing the decoded audio data according to the extracted pre-processing information.

Method and device for metadata for multi-channel or sound-field audio signals

A method for encoding multi-channel HOA audio signals for noise reduction comprises steps of decorrelating the channels using an inverse adaptive DSHT, the inverse adaptive DSHT comprising a rotation operation and an inverse DSHT, with the rotation operation rotating the spatial sampling grid of the iDSHT, perceptually encoding each of the decorrelated channels, encoding rotation information, the rotation information comprising parameters defining said rotation operation, and transmitting or storing the perceptually encoded audio channels and the encoded rotation information.

Method and apparatus for playback of a higher-order ambisonics audio signal

With quantization index modulation QIM it is possible to achieve a very high data rate, and the capacity of the watermark transmission is mostly independent of the characteristics of the original audio signal, but the audio quality suffers from degradation with each watermark embedding-and-removal step. In order to avoid degradation of the audio quality, the inventive audio signal watermarking uses specific quantizer curves in time domain and in particular in frequency domain for embedding the watermark message into the audio signal, whereby the processing is almost perfectly reversible. Furthermore, it has embedded a power constraint in order to guarantee that the modifications of the audio signal due to the watermark embedding are inaudible.

Method and apparatus for quantisation index modulation for watermarking an input signal

Method and device for improving the rendering of multi-channel audio signals

Growing community of inventors

Hannover, Germany

Peter Jax