SPATIAL AUDIO RENDERING AND ENCODING

摘要

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. The signals are combined to generate an output signal.

主权项

1. A spatial audio rendering apparatus, comprising:
a circuit for providing a residual downmix and data characterizing at least one audio object, the residual downmix corresponding to a downmix of audio components of an audio scene with the at least one audio object extracted; a receiver for receiving a diffuseness parameter indicative of a degree of diffuseness of the residual downmix; a first transformer for generating a first set of signals for a spatial speaker configuration by applying a first transformation to the residual downmix, the first transformation being dependent on the diffuseness parameter; a second transformer for generating a second set of signals for the spatial speaker configuration by applying a second transformation to the residual downmix, the second transformation being dependent on the diffuseness parameter and comprising a decorrelation of at least one channel of the residual downmix; a circuit for generating a third set of signals for the spatial speaker configuration from the data characterizing the at least one audio object; and an output circuit for generating an output set of signals for the spatial speaker configuration by combining the first, second and third set of signals; wherein the diffuseness parameter is direction dependent.