Patent ID: 9094771
Filing Date: 2015-07-28
Classification: H04S

Abstract:
1. A method for generating 3D output audio comprising N+M full range channels, where N and M are positive integers and the N+M full range channels are intended to be rendered by speakers including at least two speakers at different distances from a listener, said method including the steps of: (a) providing N channel input audio, comprising N full range channels; (b) upmixing the input audio to generate the 3D output audio, and (c) providing source depth data indicative of distance from the listener of at least one audio source, wherein step (b) includes a step of upmixing the N channel input audio to generate the 3D output audio using the source depth data, wherein the N channel input audio is a soundtrack of a stereoscopic 3D video program comprising left and right eye frame images, and step (c) includes generating the source depth data, including by identifying at least one visual image feature determined by the 3D video program, and generating the source depth data to be indicative of determined depth of each said visual image feature, wherein generating the source depth data comprises measuring a disparity of the least one visual image feature of the left and right eye frame images, using the disparity to create a visual depth map, and using the visual depth map to generate the source depth data.