US 7,116,787 B2 · Perceptual synthesis of auditory scenes

Abstract

An auditory scene is synthesized by applying two or more different sets of one or more spatial parameters (e.g., an inter-ear level difference (ILD), inter-ear time difference (ITD), and/or head-related transfer function (HRTF)) to two or more different frequency bands of a combined audio signal, where each different frequency band is treated as if it corresponded to a single audio source in the auditory scene. In one embodiment, the combined audio signal corresponds to the combination of two or more different source signals, where each different frequency band corresponds to a region of the combined audio signal in which one of the source signals dominates the others. In this embodiment, the different sets of spatial parameters are applied to synthesize an auditory scene comprising the different source signals. In another embodiment, the combined audio signal corresponds to the combination of the left and right audio signals of a binaural signal corresponding to an input auditory scene. In this embodiment, the different sets of spatial parameters are applied to reconstruct the input auditory scene. In either case, transmission bandwidth requirements are reduced by reducing to one the number of different audio signals that need to be transmitted to a receiver configured to synthesize/reconstruct the auditory scene.

Claims48

Dependent claims

A method for synthesizing an auditory scene, comprising the steps of:

(a) dividing an input audio signal into a plurality of different frequency bands;
and
(b) applying two or more different sets of one or more spatial parameters to two or more of the different frequency bands in the input audio signal to generate two or more synthesized audio signals of the auditory scene, wherein, for at least one of the sets of one or more spatial parameters, at least one of the spatial parameters corresponds to a combination of two or more different audio sources in the auditory scene that takes into account relative dominance of the two or more different audio sources in the auditory scene.

A method for synthesizing an auditory scene, comprising the steps of:

(a) dividing an input audio signal into a plurality of different frequency bands;
and
(b) applying two or more different sets of one or more spatial parameters to two or more of the different frequency bands in the input audio signal to generate two or more synthesized audio signals of the auditory scene, wherein:
the input audio signal corresponds to a combination of audio signals from two or more different audio sources;
and
each set of one or more spatial parameters is applied to at least one frequency band in which the input audio signal is dominated by a corresponding audio source in the auditory scene.

3 more elements

Dependencies are inferred from the claim text.

Perceptual synthesis of auditory scenes

Life of this patent

Perceptual synthesis of auditory scenes

Life of this patent

Abstract

Claims48