Abstract: An output signal is generated from an input signal by applying a send effect processing to the input signal. The input signal comprises a weighted sum of component signals. Dependencies between the weighted component signals are represented by parameters. In accordance with the present invention, the output signal is generated in dependence of the parameters to compensate for an unequal weighting of component signals comprised in the input signal. Due to this compensation the strength of the send effect corresponding to the separate component signals is (nearly) proportional to the strength of each of the component signals, which results in more realistic surround experience.

Abstract: A parametric stereo upmix method for generating a left signal and a right signal from a mono downmix signal based on spatial parameters includes predicting a difference signal comprising a difference between the left signal and the right signal based on the mono downmix signal scaled with a prediction coefficient. The prediction coefficient is derived from the spatial parameters. The method further includes deriving the left signal and the right signal based on a sum and a difference of the mono downmix signal and said difference signal.

Abstract: An encoder (501) generates data representing an audio scene by a first downmix and data characterizing audio objects. In addition, a direction dependent diffuseness parameter indicative of a degree of diffuseness of a residual downmix is provided where the residual downmix corresponds to a downmix of audio components of the audio scene with the audio objects being extracted. A rendering apparatus (503) comprises a receiver (701) receiving the data from the encoder (501). A circuit (703) generates signals for a spatial speaker configuration from the audio objects. A transformer (709) generates non-diffuse sound signals for the spatial speaker configuration by applying a first transformation to the residual downmix and another transformer (707) generates signals for the spatial speaker configuration by applying a second transformation to the residual downmix by applying a decorrelation to the residual downmix. The transformations are dependent on the direction dependent diffuseness parameter.

Abstract: An encoder (1201) for encoding a plurality of audio signals comprises a selector (1303) which selects a subset of time-frequency tiles to be downmixed and a subset of tiles to be non-downmix. A downmix indication is generated which indicates whether tiles are encoded as downmixed encoded tiles or as non-downmix tiles. An encoded signal comprising the encoded tiles and the downmix indication is fed to a decoder (1203) which includes a receiver (1401) for receiving the signal. A generator (1403) generates output signals from the encoded time-frequency tiles where the generation of the output signals includes an upmixing for tiles that are indicated by the downmix indication to be encoded downmixed tiles. The invention may provide more flexible and/or improved encoding/decoding and may specifically provide improved scalability, especially at higher data rates.

Abstract: An audio system comprises a receiver (301) for receiving an audio signal, such as an audio object or a signal of a channel of a spatial multi-channel signal. A binaural circuit (303) generates a binaural output signal by processing the audio signal. The processing is representative of a binaural transfer function providing a virtual sound source position for the audio signal. A measurement circuit (307) generating measurement data indicative of a characteristic of the acoustic environment and a determining circuit (311) determines an acoustic environment parameter in response to the measurement data. The acoustic environment parameter may typically be a reverberation parameter, such as a reverberation time. An adaptation circuit (313) adapts the binaural transfer function in response to the acoustic environment parameter. For example, the adaptation may modify a reverberation parameter to more closely resemble the reverberation characteristics of the acoustic environment.

Abstract: The present invention relates to device, system and method for counting the number of cycles of a periodic movement of a subject, e.g. for step counting of a person.

Abstract: A transmitting device comprises a binaural circuit (601) which provides a plurality of binaural rendering data sets, each binaural rendering data set comprising data representing parameters for a virtual position binaural rendering. Specifically, head related binaural transfer function data may be included in the data sets. A representation circuit (603) provides a representation indication for each of the data sets. The representation indication for a data set is indicative of the representation used by the data set. An output circuit (605) generates a bitstream comprising the data sets and the representation indications. The bitstream is received by a receiver (701) in a receiving device. A selector (703) selects a selected binaural rendering data set based on the representation indications and a capability of the apparatus, and an audio processor (707) processes the audio signal in response to data of the selected binaural rendering data set.

Abstract: A sleep monitoring device (100) is disclosed for measuring a biophysical variable (131) of a living-being (150), comprising at least two pressure sensors (101-103) spatially arranged in a predefined planar geometry. The living-being rests on the supporting layer (199) contacted by the sensors that generate sensor signals in response to pressure caused by the living being via the supporting layer. A processing unit (110) determines the position of the living-being on the supporting layer based on differences between the sensor signals; a magnitude attenuation factor is determined based on the position of the living-being and a position of a sensor; the biophysical variable is determined from a sensor signal generated by that sensor, including a magnitude correction based on the magnitude attenuation factor. The effect of the invention is that only few sensors are needed to measure a biophysical variable accurately, irrespective of the living-being's position on the supporting layer.

Abstract: An audio renderer comprises a receiver (801) receiving input data comprising early part data indicative of an early part of a head related binaural transfer function; reverberation data indicative of a reverberation part of the transfer function; and a synchronization indication indicative of a time offset between the early part and the reverberation part. An early part circuit (803) generates an audio component by applying a binaural processing to an audio signal where the processing depends on the early part data. A reverberator (807) generates a second audio component by applying a reverberation processing to the audio signal where the reverberation processing depends on the reverberation data. A combiner (809) generates a signal of a binaural stereo signal by combining the two audio components. The relative timing of the audio components is adjusted based on the synchronization indication by a synchronizer (805) which specifically may be a delay.

Abstract: A receiver (603) receives a position given by a first value representing a first position parameter and a second value representing a second position parameter. A match circuit (605) determines if the second value matches a nominal value. If so, an output circuit (609) generates output data including data representing the first value in a field of the output data but not including data representing the second value in the output data. Otherwise, the output circuit (609) includes data in the field which represents an invalid position value for the first position parameter. A receiver determines if data of a data field represents a valid position value for the first position parameter. If so, it determines a position with the first value being the valid position value and the second value being a nominal value for the second position parameter. Otherwise it determines the second value from a second field of the input data.

Abstract: An audio encoder comprises a multi-channel receiver which receives an M-channel audio signal where M>2. A down-mix processor down-mixes the M-channel audio signal to a first stereo signal and associated parametric data and a spatial processor modifies the first stereo signal to generate a second stereo signal in response to the associated parametric data and spatial parameter data for a binaural perceptual transfer function, such as a Head Related Transfer Function (HRTF). The second stereo signal is a binaural signal and may specifically be a (3D) virtual spatial signal. An output data stream comprising the encoded data and the associated parametric data is generated by an encode processor and an output processor. The HRTF processing may allow the generation of a (3D) virtual spatial signal by conventional stereo decoders. A multi-channel decoder may reverse the process of the spatial processor to generate an improved quality multi-channel signal.

Abstract: An encoder for a multi-channel audio signal which comprises a down-mixer (201, 203, 205) for generating a down-mix as a combination of at least a first and second channel signal weighted by respectively a first and second weight with different amplitudes for at least some time-frequency intervals. Furthermore, a circuit (201, 203, 209) generates up-mix parametric data characterizing a relationship between the channel signals as well as characterizing the weights. A circuit generates weight estimates for the encoder weights from the up-mix parametric data; and comprises an up-mixer (407) which recreates the multi channel audio signal by up-mixing the down-mix in response to the up-mix parametric data, the first weight estimate and the second weight estimate. The up-mixing is dependent on the amplitude of at least one of the weight estimate(s).

Abstract: An encoder (1201) for encoding a plurality of audio signals comprises a selector (1303) which selects a subset of time-frequency tiles to be downmixed and a subset of tiles to be non-downmix. A downmix indication is generated which indicates whether tiles are encoded as downmixed encoded tiles or as non-downmix tiles. An encoded signal comprising the encoded tiles and the downmix indication is fed to a decoder (1203) which includes a receiver (1401) for receiving the signal. A generator (1403) generates output signals from the encoded time-frequency tiles where the generation of the output signals includes an upmixing for tiles that are indicated by the downmix indication to be encoded downmixed tiles. The invention may provide more flexible and/or improved encoding/decoding and may specifically provide improved scalability, especially at higher data rates.

Abstract: An encoder (501) generates data representing an audio scene by a first downmix and data characterizing audio objects. In addition, a direction dependent diffuseness parameter indicative of a degree of diffuseness of a residual downmix is provided where the residual downmix corresponds to a downmix of audio components of the audio scene with the audio objects being extracted. A rendering apparatus (503) comprises a receiver (701) receiving the data from the encoder (501). A circuit (703) generates signals for a spatial speaker configuration from the audio objects. A transformer (709) generates non-diffuse sound signals for the spatial speaker configuration by applying a first transformation to the residual downmix and another transformer (707) generates signals for the spatial speaker configuration by applying a second transformation to the residual downmix by applying a decorrelation to the residual downmix. The transformations are dependent on the direction dependent diffuseness parameter.

Abstract: A parametric stereo upmix method for generating a left signal and a right signal from a mono downmix signal based on spatial parameters includes predicting a difference signal comprising a difference between the left signal and the right signal based on the mono downmix signal scaled with a prediction coefficient. The prediction coefficient is derived from the spatial parameters. The method further includes deriving the left signal and the right signal based on a sum and a difference of the mono downmix signal and said difference signal.

Abstract: A parametric stereo upmix apparatus generates left and right signals from a mono downmix signal based on spatial parameters. The parametric stereo upmix includes a predictor configured to predict a difference signal including a difference between the left and right signals based on the mono downmix signal scaled with a prediction coefficient. The prediction coefficient is derived from the spatial parameters. The parametric stereo upmix apparatus further includes an arithmetic unit configured to derive the left and right signals based on a sum and a difference of the mono downmix signal and the difference signal.

Abstract: A device (1) for converting a first number (M) of input audio channels into a second, larger number (N) of output audio channels comprises: decorrelation units (3) for decomposing the input audio channels into a set of decorrelated auxiliary channels, at least one upmix unit (4) for combining the decorrelated auxiliary channels into the output audio channels, and at least one pre-processing unit (2) for pre-processing the input audio channels and feeding the pre-processed input audio channels to the decorrelation units (3). The pre-processing unit (2) and the upmix unit (4) are preferably controlled by audio parameters.

Abstract: The invention relates to multi-channel audio signal processing, in particular to a method of processing a multi-channel audio signal and to a signal processing device.

Abstract: An audio encoder (109) has a hierarchical encoding structure and generates a data stream comprising one or more audio channels as well as parametric audio encoding data. The encoder (109) comprises an encoding structure processor (305) which inserts decoder tree structure data into the data stream. The decoder tree structure data comprises at least one data value indicative of a channel split characteristic for an audio channel at a hierarchical layer of the hierarchical decoder structure and may specifically specify the decoder tree structures to be applied by a decoder. A decoder (115) comprises a receiver (401) which receives the data stream and a decoder structure processor (405) for generating the hierarchical decoder structure in response to the decoder tree structure data. A decode processor (403) then generates output audio channels from the data stream using the hierarchical decoder structure.

Abstract: An apparatus, such as a decoder is arranged to modify the sweet-spot of a spatial M-channel audio signal by modifying spatial parameters. Specifically, a receiver (201) receives an N-channel audio signal where N<M. The M-channel signal may specifically be an MPEG Surround sound signal and the N-channel signal may be a stereo signal. A parameter unit (203) determines spatial parameters relating the N-channel audio signal to the spatial M-channel audio signal and a modifying unit (207) modifies the sweet-spot of the spatial M-channel audio signal by modifying at least one of the spatial parameters. A generating unit (205) then generates the spatial M-channel audio signal by up-mixing the N-channel audio signal using the at least one modified spatial parameter. An efficient and/or low complexity sweet-spot manipulation is achieved by an integration of sweet-spot manipulation and multi-channel generation.