V-dmc ac displacement coding with fixed-point inverse quantization offset

Abstract

A device for decoding encoded dynamic mesh data is configured to arithmetically decode a set of quantized wavelet coefficients from a displacement sub-bitstream of the encoded dynamic mesh data; inverse quantize the set of quantized wavelet coefficients to determine a set of fixed-point dequantized coefficient values; determine one or more inverse quantization offset parameters included in the displacement sub-bitstream; determine a fixed-point offset value based on the one or more inverse quantization offset parameters; determine a set of final wavelet coefficients based on the fixed-point offset value and the set of fixed-point dequantized coefficient values; and determine one or more displacement vectors based on the set of final wavelet coefficients.

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