Patents by Inventor Jonas Engdegard

Jonas Engdegard has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 8243936
    Abstract: The present invention provides improvements to prior art audio codecs that generate a stereo-illusion through post-processing of a received mono signal. These improvements are accomplished by extraction of stereo-image describing parameters at the encoder side, which are transmitted and subsequently used for control of a stereo generator at the decoder side. Furthermore, the invention bridges the gap between simple pseudo-stereo methods, and current methods of true stereo-coding, by using a new form of parametric stereo coding. A stereo-balance parameter is introduced, which enables more advanced stereo modes, and in addition forms the basis of a new method of stereo-coding of spectral envelopes, of particular use in systems where guided HFR (High Frequency Reconstruction) is employed. As a special case, the application of this stereo-coding scheme in scalable HFR-based codecs is described.
    Type: Grant
    Filed: October 30, 2009
    Date of Patent: August 14, 2012
    Assignee: Dolby International AB
    Inventors: Fredrik Henn, Kristofer Kjorling, Lars Liljeryd, Jonas Roden, Jonas Engdegard
  • Publication number: 20120197650
    Abstract: The application relates to a method for encoding time marking information within audio data. According to the method, time marking information is encoded as audio metadata within the audio data. The time marking information indicates at least one section of an audio object encoded in the audio data. E.g. the time marking information may specify a start position and an end position of the section or only a start position. The at least one section may be a characteristic part of the audio object, which allows instant recognition by listening. The time marking information encoded in the audio data enables instantaneous browsing to a certain section of the audio object. The application further relates to a method for decoding the time marking information encoded in the audio data.
    Type: Application
    Filed: October 14, 2010
    Publication date: August 2, 2012
    Applicant: DOLBY INTERNATIONAL AB
    Inventors: Barbara Resch, Jonas Engdegård
  • Patent number: 8223976
    Abstract: 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 downmix channel weighted by the level parameter is equal to a sum of energies of the original channels. The additional level parameter is transmitted to a multi-channel reconstructor together with the parameter set or together with a down-mix channel. An apparatus for generating a multi-channel representation uses the level parameter to correct the energy of the at least one transmitted down-mix channel before entering the down-mix signal into an up-mixer or within the up-mixing process.
    Type: Grant
    Filed: September 8, 2006
    Date of Patent: July 17, 2012
    Assignee: Dolby International AB
    Inventors: Heiko Purnhagen, Lars Villemoes, Jonas Engdegard, Jonas Roeden, Kristofer Kjoerling
  • Publication number: 20120143613
    Abstract: An apparatus for providing one or more adjusted parameters for a provision of an upmix signal representation on the basis of a downmix signal representation and an object-related parametric information includes a parameter adjuster. The parameter adjuster is configured to receive one or more input parameters and to provide, on the basis thereof, one or more adjusted parameters. The parameter adjuster is configured to provide the one or more adjusted parameters in dependence on the one or more input parameters and the object-related parametric information, such that a distortion of the upmix signal representation caused by the use of non-optimal parameters is reduced at least for input parameters deviating from optimal parameters by more than a predetermined deviation.
    Type: Application
    Filed: October 28, 2011
    Publication date: June 7, 2012
    Inventors: Juergen Herre, Andreas Hoelzer, Leonid Terentiev, Thorsten Kastner, Cornella Falch, Heiko Purnhagen, Jonas Engdegard, Falko Ridderbusch
  • Patent number: 8116460
    Abstract: The present invention provides improvements to prior art audio codecs that generate a stereo-illusion through post-processing of a received mono signal. These improvements are accomplished by extraction of stereo-image describing parameters at the encoder side, which are transmitted and subsequently used for control of a stereo generator at the decoder side. Furthermore, the invention bridges the gap between simple pseudo-stereo methods, and current methods of true stereo-coding, by using a new form of parametric stereo coding. A stereo-balance parameter is introduced, which enables more advanced stereo modes, and in addition forms the basis of a new method of stereo-coding of spectral envelopes, of particular use in systems where guided HFR (High Frequency Reconstruction) is employed. As a special case, the application of this stereo-coding scheme in scalable HFR-based codecs is described.
    Type: Grant
    Filed: September 28, 2005
    Date of Patent: February 14, 2012
    Assignee: Coding Technologies AB
    Inventors: Fredrik Henn, Kristofer Kjorling, Lars Liljeryd, Jonas Roden, Jonas Engdegard
  • Patent number: 8081763
    Abstract: The present invention provides improvements to prior art audio codecs that generate a stereo-illusion through post-processing of a received mono signal. These improvements are accomplished by extraction of stereo-image describing parameters at the encoder side, which are transmitted and subsequently used for control of a stereo generator at the decoder side. Furthermore, the invention bridges the gap between simple pseudo-stereo methods, and current methods of true stereo-coding, by using a new form of parametric stereo coding. A stereo-balance parameter is introduced, which enables more advanced stereo modes, and in addition forms the basis of a new method of stereo-coding of spectral envelopes, of particular use in systems where guided HFR (High Frequency Reconstruction) is employed. As a special case, the application of this stereo-coding scheme in scalable HFR-based codecs is described.
    Type: Grant
    Filed: July 2, 2009
    Date of Patent: December 20, 2011
    Assignee: Coding Technologies AB
    Inventors: Fredrik Henn, Kristofer Kjorling, Lars Liljeryd, Jonas Roden, Jonas Engdegard
  • Patent number: 8073144
    Abstract: The present invention provides improvements to prior art audio codecs that generate a stereo-illusion through post-processing of a received mono signal. These improvements are accomplished by extraction of stereo-image describing parameters at the encoder side, which are transmitted and subsequently used for control of a stereo generator at the decoder side. Furthermore, the invention bridges the gap between simple pseudo-stereo methods, and current methods of true stereo-coding, by using a new form of parametric stereo coding. A stereo-balance parameter is introduced, which enables more advanced stereo modes, and in addition forms the basis of a new method of stereo-coding of spectral envelopes, of particular use in systems where guided HFR (High Frequency Reconstruction) is employed. As a special case, the application of this stereo-coding scheme in scalable HFR-based codecs is described.
    Type: Grant
    Filed: September 27, 2005
    Date of Patent: December 6, 2011
    Assignee: Coding Technologies AB
    Inventors: Fredrik Henn, Kristofer Kjorling, Lars Liljeryd, Jonas Roden, Jonas Engdegard
  • Patent number: 8059826
    Abstract: The present invention provides improvements to prior art audio codecs that generate a stereo-illusion through post-processing of a received mono signal. These improvements are accomplished by extraction of stereo-image describing parameters at the encoder side, which are transmitted and subsequently used for control of a stereo generator at the decoder side. Furthermore, the invention bridges the gap between simple pseudo-stereo methods, and current methods of true stereo-coding, by using a new form of parametric stereo coding. A stereo-balance parameter is introduced, which enables more advanced stereo modes, and in addition forms the basis of a new method of stereo-coding of spectral envelopes, of particular use in systems where guided HFR (High Frequency Reconstruction) is employed. As a special case, the application of this stereo-coding scheme in scalable HFR-based codecs is described.
    Type: Grant
    Filed: September 27, 2005
    Date of Patent: November 15, 2011
    Assignee: Coding Technologies AB
    Inventors: Fredrik Henn, Kristofer Kjorling, Lars Liljeryd, Jonas Roden, Jonas Engdegard
  • Patent number: 8054981
    Abstract: Parameters being a measure for a characteristic of a channel or of a pair of channels, wherein the parameter is a measure for a characteristic of the channel or of the pair of channels with respect to another channel of a multi-channel signal can be quantized more efficiently using a quantization rule that is generated based on a relation of an energy measure of the channel or the pair of channels and an energy measure of the multi-channel signal. With generation of the quantization rule taking into account a psycho acoustic approach, the size of an encoded representation of the multi-channel signal can be decreased by coarser quantization without significantly disturbing the perceptual quality of the multi-channel signal when reconstructed from the encoded representation.
    Type: Grant
    Filed: April 19, 2006
    Date of Patent: November 8, 2011
    Assignees: Coding Technologies AB, Koninklijke Philips Electronics N.V., Fraunhofer-Gesellschaft zur Foerderung der Angewandten Forshung E.V.
    Inventors: Jonas Röden, Jonas Engdegard, Heiko Purnhagen, Jeroen Breebaart, Erik Schuijers, Steven van de Par, Johannes Hilpert, Jürgen Herre
  • Publication number: 20110261966
    Abstract: A method and system for applying reverb to an M-channel down-mixed audio input signal indicative of X individual audio channels, where X is greater than M. Typically, the method includes steps of: in response to spatial cue parameters indicative of spatial image of the downmixed input signal, generating Y discrete reverb channel signals, where each of the reverb channel signals at a time, t, is a linear combination of at least a subset of values of the individual audio channels at the time, t, and individually applying reverb to each of at least two of the reverb channel signals, thereby generating Y reverbed channel signals.
    Type: Application
    Filed: December 16, 2009
    Publication date: October 27, 2011
    Applicant: DOLBY INTERNATIONAL AB
    Inventor: Jonas Engdegard
  • Publication number: 20110264456
    Abstract: Binaural rendering a multi-channel audio signal into a binaural output signal is described. The multi-channel audio signal has a stereo downmix signal into which a plurality of audio signals are downmixed, and side information having a downmix information, as well as object level information of the plurality of audio signals and inter-object cross correlation information. Based on a first rendering prescription, a preliminary binaural signal is computed from the first and second channels of the stereo downmix signal. A decorrelated signal is generated as an perceptual equivalent to a mono downmix of the first and second channels of the stereo downmix signal being, however, decorrelated to the mono downmix. Depending on a second rendering prescription, a corrective binaural signal is computed from the decorrelated signal and the preliminary binaural signal is mixed with the corrective binaural signal to obtain the binaural output signal.
    Type: Application
    Filed: April 6, 2011
    Publication date: October 27, 2011
    Applicants: Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V., Dolby Sweden AB, Koninklijke Philips Electronics N.V.
    Inventors: Jeroen KOPPENS, Harald MUNDT, Leonid TERENTIEV, Cornelia FALCH, Johannes HILPERT, Oliver HELLMUTH, Lars VILLEMOES, Jan PLOGSTIES, Jeroen BREEBAART, Jonas ENGDEGARD
  • Publication number: 20110235810
    Abstract: An apparatus and a method for generating a multi-channel synthesizer control signal, a multi-channel synthesizer, a method of generating an output signal from an input signal and a machine-readable storage medium are provided. On an encoder-side, a multi-channel input signal is analyzed for obtaining smoothing control information, which is to be used by a decoder-side multi-channel synthesis for smoothing quantized transmitted parameters or values derived from the quantized transmitted parameters for providing an improved subjective audio quality in particular for slowly moving point sources and rapidly moving point sources having tonal material such as fast moving sinusoids.
    Type: Application
    Filed: June 13, 2011
    Publication date: September 29, 2011
    Applicants: FRAUNHOFER-GESELLSCHAFT ZUR FORDERUNG DER ANGEWANDTEN FORSCHUNG E.V., CODING TECHNOLOGIES AB, KONINKLIJKE PHILIPS ELECTRONICS N.V.
    Inventors: MATTHIAS NEUSINGER, JÜRGEN HERRE, SASCHA DISCH, HEIKO PURNHAGEN, KRISTOFER KJÖRLING, JONAS ENGDEGARD, JEROEN BREEBAART, ERIK SCHUIJERS, WERNER OOMEN
  • Patent number: 8019350
    Abstract: A multi-channel signal having at least three channels can be reconstructed such, that the reconstructed channels are at least partly de-correlated from each other using a downmixed signal derived from an original multi-channel signal and a set of de-correlated signals provided by a de-correlator (101) that derives the set of de-correlated signals from the down-mix signal, wherein the de-correlated signals within the set of de-correlated signals are mutually mostly orthogonal to each other, i.e. an orthogonality relation between channel pairs is satisfied within an orthogonality tolerance range.
    Type: Grant
    Filed: November 29, 2005
    Date of Patent: September 13, 2011
    Assignees: Coding Technologies AB, Koninklijke Philips Electronics, N.V.
    Inventors: Heiko Purnhagen, Jonas Engdegard, Jeroen Breebaart, Erik Schuijers
  • Patent number: 8014534
    Abstract: The present invention provides improvements to prior art audio codecs that generate a stereo-illusion through post-processing of a received mono signal. These improvements are accomplished by extraction of stereo-image describing parameters at the encoder side, which are transmitted and subsequently used for control of a stereo generator at the decoder side. Furthermore, the invention bridges the gap between simple pseudo-stereo methods, and current methods of true stereo-coding, by using a new form of parametric stereo coding. A stereo-balance parameter is introduced, which enables more advanced stereo modes, and in addition forms the basis of a new method of stereo-coding of spectral envelopes, of particular use in systems where guided HFR (High Frequency Reconstruction) is employed. As a special case, the application of this stereo-coding scheme in scalable HFR-based codecs is described.
    Type: Grant
    Filed: September 27, 2005
    Date of Patent: September 6, 2011
    Assignee: Coding Technologies AB
    Inventors: Fredrik Henn, Kristofer Kjorling, Lars Liljeryd, Jonas Roden, Jonas Engdegard
  • Publication number: 20110211703
    Abstract: A parametric representation of a multi-channel audio signal having parameters suited to be used together with a monophonic downmix signal to calculate a reconstruction of the multi-channel audio signal can efficiently be derived in a stereo-backwards compatible way when a parameter combiner is used to generate the parametric representation by combining a one or more spatial parameters and a stereo parameter resulting in a parametric representation having a decoder usable stereo parameter and an information on the one or more spatial parameters that represents, together with the decoder usable stereo parameter, the one or more spatial parameters.
    Type: Application
    Filed: March 3, 2011
    Publication date: September 1, 2011
    Inventors: Lars Villemoes, Heiko Purnhagen, Jonas Roeden, Jonas Engdegard, Jeroen Breebaart, Erik Schuijers
  • Patent number: 7986789
    Abstract: 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, or a second coherence parameter, or a second inter-channel time difference parameter between a second channel pair are calculated. This set of parameters is the parameter representation of the original signals. The first channel pair has two channels, which are different from two channels of a second channel pair. Furthermore, each channel of the two channel pairs is one of the original channels, or a weighted combination of the original channels, and the first channel pair and the second channel pair include information on the three original channels.
    Type: Grant
    Filed: October 16, 2006
    Date of Patent: July 26, 2011
    Assignee: Coding Technologies AB
    Inventors: Heiko Purnhagen, Lars Villemoes, Jonas Engdegard, Jonas Roeden, Kristofer Kjoerling
  • Patent number: 7983922
    Abstract: On an encoder-side, a multi-channel input signal is analyzed for obtaining smoothing control information, which is to be used by a decoder-side multi-channel synthesis for smoothing quantized transmitted parameters or values derived from the quantized transmitted parameters for providing an improved subjective audio quality in particular for slowly moving point sources and rapidly moving point sources having tonal material such as fast moving sinusoids.
    Type: Grant
    Filed: August 25, 2005
    Date of Patent: July 19, 2011
    Assignee: Fraunhofer-Gesellschaft zur Foerderung der Angewandten Forschung e.V.
    Inventors: Matthias Neusinger, Jürgen Herre, Sascha Disch, Heiko Purnhagen, Kristofer Kjörling, Jonas Engdegard, Jeroen Breebaart, Erik Schuijers, Werner Oomen
  • Patent number: 7974847
    Abstract: 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 parametric information and decoder-side derived interpolation information or encoder-generated interpolation information for selecting one of a plurality of different interpolation characteristics.
    Type: Grant
    Filed: November 22, 2005
    Date of Patent: July 5, 2011
    Assignee: Coding Technologies AB
    Inventors: Kristofer Kjoerling, Heiko Purnhagen, Jonas Engdegard, Jonas Roeden
  • Patent number: 7961890
    Abstract: A parametric representation of a multi-channel audio signal describes the spatial properties of the audio signal well with compact side information when a coherence information, describing the coherence between a first and a second channel, is derived within a hierarchical encoding process only for channel pairs including a first channel having only information of a left side with respect to a listening position and including a second channel having only information from a right side with respect to a listening position. As within the hierarchical process the multiple audio channels of the audio signal are downmixed iteratively into monophonic channels, one can pick the relevant parameters from an encoding step involving only channel pairs carrying the information needed to describe the spatial properties of the multi-channel audio signal.
    Type: Grant
    Filed: December 21, 2005
    Date of Patent: June 14, 2011
    Assignees: Fraunhofer-Gesellschaft zur Foerderung der Angewandten Forschung, e.V., Coding Technologies AB, Koninklijke Philips Electronics N.V.
    Inventors: Andreas Hölzer, Jürgen Herre, Heiko Purnhagen, Kristofer Kjörling, Jonas Röden, Lars Villemoes, Jonas Engdegard, Jeroen Breebaart, Erik Schuijers, Werner Oomen
  • Publication number: 20110075848
    Abstract: 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 downmix channel weighted by the level parameter is equal to a sum of energies of the original channels. The additional level parameter is transmitted to a multi-channel reconstructor together with the parameter set or together with a down-mix channel. An apparatus for generating a multi-channel representation uses the level parameter to correct the energy of the at least one transmitted down-mix channel before entering the down-mix signal into an up-mixer or within the up-mixing process.
    Type: Application
    Filed: August 31, 2010
    Publication date: March 31, 2011
    Inventors: Heiko Purnhagen, Lars Villemoes, Jonas Engdegard, Jonas Roeden, Kristofer Kjoerling