Compressing blendshapes for avatar data for an augmented reality (AR) communication session

Abstract

An example device for communicating augmented reality (AR) media data includes: a memory configured to store AR media data; and a processing system implemented in circuitry and configured to: receive a base mesh of an avatar of AR media data and an encoded blendshape for the base mesh for an AR communication session; decode the encoded blendshape to reproduce a blendshape that is decoded; and present the blendshape. To decode the blendshape, the processing system may: decode a transformation matrix; decode quantized normalized values representing differences between vertices of the blendshape and corresponding vertices of the base mesh; and decode indices for the vertices of the blendshape for which the quantized normalized values are encoded.

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