1
Lars Villemoes, Kristofer Kjoerling, Heiko Purnhagen, Jonas Roeden, Jeroen Breebaart, Gerard Hotho: Multi parametrisation based multi-channel reconstruction. Coding Technologies, Koninklijke Philips Electronics, Michael A Glenn, Glenn Patent Group, February 23, 2010: US07668722 (28 worldwide citation)

A multi-channel synthesizer for generating at least three output channels using an input signal having at least one base channel, the base channel being derived from the original multi-channel signal, the input signal further including at least two different up-mixing parameters, and an up-mixer mod ...


2
Kristofer Kjoerling, Heiko Purnhagen, Jonas Engdegard, Jonas Roeden: Advanced methods for interpolation and parameter signalling. Coding Technologies, Michael A Glenn, Glenn Patent Group, July 5, 2011: US07974847 (24 worldwide citation)

A parameter calculator calculates lower resolution parametric information and interpolation information. On a decoder-side, an upmixer is used for generating the output channels. The upmixer uses high resolution parametric information generated by a parameter interpolator using the low resolution pa ...


3
Lars Villemoes, Kristofer Kjoerling, Jeroen Breebaart: Reduced number of channels decoding. Dolby International, Koninklijke Philips Electronics, Michael A Glenn, Glenn Patent Group, June 21, 2011: US07965848 (22 worldwide citation)

An intermediate channel representation of a multi-channel signal can be reconstructed highly efficient and with high fidelity, when upmix parameters for upmixing a transmitted downmix signal to the intermediate channel representation are derived that allow for an upmix using the same upmixing algori ...


4
Lars Liljeryd, Per Ekstrand, Fredrik Henn, Kristofer Kjoerling: Spectral translation/folding in the subband domain. Coding Technologies Sweden, Michael A Glenn, Glenn Patent Group, March 16, 2010: US07680552 (18 worldwide citation)

The present invention relates to a new method and apparatus for improvement of High Frequency Reconstruction (HFR) techniques using frequency translation or folding or a combination thereof. The proposed invention is applicable to audio source coding systems, and offers significantly reduced computa ...


5
Heiko Purnhagen, Lars Villemoes, Jonas Engdegard, Jonas Roeden, Kristofer Kjoerling: Apparatus and method for generating a level parameter and apparatus and method for generating a multi-channel representation. Dolby International, Michael A Glenn, Glenn Patent Group, July 17, 2012: US08223976 (18 worldwide citation)

A parameter representation of a multi-channel signal having several original channels includes a parameter set, which, when used together with at least one down-mix channel allows a multi-channel reconstruction. An additional level parameter is calculated such that an energy of the at least one down ...


6
Arijit Biswas, Heiko Purnhagen, Kristofer Kjoerling, Barbara Resch, Lars Villemoes, Per Hedelin: Audio encoder and decoder with long term prediction. Dolby Laboratories Licensing Corporation, July 23, 2013: US08494863 (17 worldwide citation)

The present invention teaches a new audio coding system that can code both general audio and speech signals well at low bit rates. A proposed audio coding system comprises a linear prediction unit for filtering an input signal based on an adaptive filter; a transformation unit for transforming a fra ...


7
Johannes Hilpert, Karsten Linzmeier, Juergen Herre, Ralph Sperschneider, Andreas Hoelzer, Lars Villemoes, Jonas Engdegard, Heiko Purnhagen, Kristofer Kjoerling, Dirk Jeroen Breebaart, Werner Oomen: Apparatus and method for multi-channel parameter transformation. Fraunhofer Gesellschaft zur Foerderung der Angewandten Forschung E V, Dolby Sweden, Koninklijke Philips Electronics, Michael A Glenn, Perkins Coie, April 1, 2014: US08687829 (16 worldwide citation)

A parameter transformer generates level parameters, indicating an energy relation between a first and a second audio channel of a multi-channel audio signal associated to a multi-channel loudspeaker configuration. The level parameter are generated based on object parameters for a plurality of audio ...


8
Lars G Liljeryd, Per Ekstrand, Fredrik Henn, Kristofer Kjoerling: Spectral translation/folding in the subband domain. Dolby International, January 26, 2016: US09245534 (12 worldwide citation)

The present invention relates to a new method and apparatus for improvement of High Frequency Reconstruction (HFR) techniques using frequency translation or folding or a combination thereof. The proposed invention is applicable to audio source coding systems, and offers significantly reduced computa ...


9
Heiko Purnhagen, Lars Villemoes, Jonas Engdegard, Jonas Roeden, Kristofer Kjoerling: Method for representing multi-channel audio signals. Coding Technologies, Michael A Glenn, Glenn Patent Group, July 26, 2011: US07986789 (12 worldwide citation)

A multi-channel input signal having at least three original channels is represented by a parameter representation of the multi-channel signal. A first balance parameter, a first coherence parameter, or a first inter-channel time difference between a first channel pair and a second balance parameter, ...


10
Lars Liljeryd, Per Ekstrand, Fredrik Henn, Kristofer Kjoerling: Spectral translation/folding in the subband domain. Dolby International, September 24, 2013: US08543232 (11 worldwide citation)

The present invention relates to a new method and apparatus for improvement of High Frequency Reconstruction (HFR) techniques using frequency translation or folding or a combination thereof. The proposed invention is applicable to audio source coding systems. This is accomplished by means of frequen ...