公开(公告)号：US20190387350A1

公开(公告)日：2019-12-19

申请号：US16445163

申请日：2019-06-18

Applicant: Magic Leap, Inc.

Inventor： Remi Samuel AUDFRAY ,  Jean-Marc JOT ,  Samuel Charles DICKER ,  Brian Lloyd SCHMIDT

IPC: H04S7/00 ,  H04R5/033 ,  H04R5/04 ,  H04S3/00 ,  H04R3/04 ,  G10K15/10

Abstract: Systems and methods of presenting an output audio signal to a listener located at a first location in a virtual environment are disclosed. According to embodiments of a method, an input audio signal is received. For each sound source of a plurality of sound sources in the virtual environment, a respective first intermediate audio signal corresponding to the input audio signal is determined, based on a location of the respective sound source in the virtual environment, and the respective first intermediate audio signal is associated with a first bus. For each of the sound sources of the plurality of sound sources in the virtual environment, a respective second intermediate audio signal is determined. The respective second intermediate audio signal corresponds to a reverberation of the input audio signal in the virtual environment. The respective second intermediate audio signal is determined based on a location of the respective sound source, and further based on an acoustic property of the virtual environment. The respective second intermediate audio signal is associated with a second bus. The output audio signal is presented to the listener via the first bus and the second bus.

公开(公告)号：US20190379992A1

公开(公告)日：2019-12-12

申请号：US16438358

申请日：2019-06-11

Applicant: Magic Leap, Inc.

Inventor： Brian Lloyd SCHMIDT ,  Samuel Charles Dicker

IPC: H04S7/00 ,  G10L19/008 ,  H04S3/00 ,  G10L25/21

Abstract: An audio system and method of spatially rendering audio signals that uses modified virtual speaker panning is disclosed. The audio system may include a fixed number F of virtual speakers, and the modified virtual speaker panning may dynamically select and use a subset P of the fixed virtual speakers. The subset P of virtual speakers may be selected using a low energy speaker detection and culling method, a source geometry-based culling method, or both. One or more processing blocks in the decoder/virtualizer may be bypassed based on the energy level of the associated audio signal or the location of the sound source relative to the user/listener, respectively. In some embodiments, a virtual speaker that is designated as an active virtual speaker at a first time, may also be designated as an active virtual speaker at a second time to ensure the processing completes.