摘要:
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 objects associated to a down-mix channel, which is generated using object audio signals associated to the audio objects. The object parameters comprise an energy parameter indicating an energy of the object audio signal. To derive the coherence and the level parameters, a parameter generator is used, which combines the energy parameter and object rendering parameters, which depend on a desired rendering configuration.
摘要:
An audio signal decoder for providing an upmix signal representation on the basis of a downmix signal representation and an object-related parametric information and in dependence on a rendering information comprises an object parameter determinator. The object parameter determinator is configured to obtain inter-object-correlation values for a plurality of pairs of audio objects. The object parameter determinator is configured to evaluate a bitstream signaling parameter in order to decide whether to evaluate individual inter-object-correlation bitstream parameter values to obtain inter-object-correlation values for a plurality of pairs of related audio objects, or to obtain inter-object-correlation values for a plurality of pairs of related audio objects using a common inter-object-correlation bitstream parameter value. The audio signal decoder also comprises a signal processor configured to obtain the upmix signal representation on the basis of the downmix signal representation and using the inter-object-correlation values for a plurality of pairs of related objects and the rendering information.
摘要:
An audio signal encoder (600) for providing a downmix signal representation (614) and an object-related parametric information (616) on the basis of a plurality of object signals (x 1 to x N ) comprises a downmixer (620) configured to provide one or more downmix signals in dependence on downmix coefficients (d 1 to d N ) associated with the object signals (x 1 to x N ), such that the one or more downmix signals comprise a superposition of a plurality of object signals, and a side information provider (630) configured to provide an inter-object-relationship side information (OLD, IOC) describing level differences and correlation characteristics of object signals (x 1 to x N ) and an individual-object side information describing one or more individual properties of the individual object signals (x 1 to x N ).
摘要:
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 objects associated to a down-mix channel, which is generated using object audio signals associated to the audio objects. The object parameters comprise an energy parameter indicating an energy of the object audio signal. To derive the coherence and the level parameters, a parameter generator is used, which combines the energy parameter and object rendering parameters, which depend on a desired rendering configuration.
摘要:
An audio signal encoder (600) for providing a downmix signal representation (614) and an object-related parametric information (616) on the basis of a plurality of object signals (x 1 to x N ) comprises a downmixer (620) configured to provide one or more downmix signals in dependence on downmix coefficients (d 1 to d N ) associated with the object signals (x 1 to x N ), such that the one or more downmix signals comprise a superposition of a plurality of object signals, and a side information provider (630) configured to provide an inter-object-relationship side information (OLD, IOC) describing level differences and correlation characteristics of object signals (x 1 to x N ) and an individual-object side information describing one or more individual properties of the individual object signals (x 1 to x N ).
摘要:
An encoder for providing an audio stream on the basis of a transform-domain representation of an input audio signal comprises a quantization error calculator configured to determine a multi-band quantization error over a plurality of frequency bands of the input audio signal for which separate band gain information is available. The encoder also comprises an audio stream provider configured to provide the audio stream such that the audio stream comprises an information describing an audio content of the frequency bands and an information describing the multi-band quantization error. A decoder for providing a decoded representation of an audio signal on the basis of an encoded audio stream representing spectral components of frequency bands of the audio signal comprises a noise filler configured to introduce noise into spectral components of a plurality of frequency bands to which separate frequency band gain information is associated on the basis of a common multi-band noise intensity value.
摘要:
An apparatus for mapping a first input loudspeaker channel and a second input loudspeaker channel of an input loudspeaker channel configuration to at least one output loudspeaker channel of an output loudspeaker channel configuration, wherein each input loudspeaker channel and each output loudspeaker channel has a direction in which an associated loudspeaker is located relative to a central listener position, wherein the apparatus is configured to map the first input loudspeaker channel to a first output loudspeaker channel of the output loudspeaker channel configuration. The apparatus is further configured to map the second input loudspeaker channel to the first output loudspeaker channel, comprising processing the second input loudspeaker channel by applying at least one of an equalization filter and a decorrelation filter to the second input loudspeaker channel.
摘要:
An audio processor for providing a plurality of loudspeaker signals, or loudspeaker feeds, on the basis of a plurality of input signals, like channeled signals and/or object signals. The audio processor is configured to obtain an information about the position of a listener. The audio processor is further configured to obtain an information about the position of a plurality of loudspeakers, or sound transducers, which may be placed within the same containment, e.g. a soundbar. The audio processor is further configured to dynamically adapt an allocation of objects and/or channel objects and/or adapted signals, like adapted channel signals, derived from the input signals, like channel signals or channel objects, or like upmixed or downmixed signals, to loudspeakers. The adaptation of the location depends on the information about the position of the listener and on the information about the positions of the loudspeakers. In other words, the audio processor decides which loudspeakers should be used in the rendering of the different channel objects or adapted signals. The audio signal processor is further configured to render the objects and/or the channel objects and/or the adapted signals derived from the input signals, in dependence on the information about the position of the listener, on the information about positions of the loudspeakers and in dependence on the allocation, in order to obtain the loudspeaker signals, such that a rendered sound follows a listener.
摘要:
An apparatus for mapping a first input loudspeaker channel and a second input loudspeaker channel of an input loudspeaker channel configuration to at least one output loudspeaker channel of an output loudspeaker channel configuration, wherein each input loudspeaker channel and each output loudspeaker channel has a direction in which an associated loudspeaker is located relative to a central listener position, wherein the apparatus is configured to map the first input loudspeaker channel to a first output loudspeaker channel of the output loudspeaker channel configuration. The apparatus is further configured to map the second input loudspeaker channel to the first output loudspeaker channel, comprising processing the second input loudspeaker channel by applying at least one of an equalization filter and a decorrelation filter to the second input loudspeaker channel.