Patent ID: 9672837
Date: 2017-06-06
CPC Classifications: G10L,H04S,H04W

Claim:
1. A method in an audio encoder for quantization of parameters relating to parametric spatial coding of audio signals, comprising: receiving at least a first parameter and a second parameter to be quantized; quantizing the first parameter based on a first scalar quantization scheme having non-uniform step-sizes to obtain a quantized first parameter, wherein the non-uniform step-sizes are selected such that smaller step-sizes are used for ranges of the first parameter where the human sound perception is most sensitive, and larger step-sizes are used for ranges of the first parameter where the human sound perception is less sensitive; dequantizing the quantized first parameter using the first scalar quantization scheme to obtain a dequantized first parameter being an approximation of the first parameter; accessing a scaling function which maps values of the dequantized first parameter on scaling factors which increase with the step-sizes corresponding to the values of the dequantized first parameter, and determining a scaling factor by subjecting the dequantized first parameter to the scaling function; and quantizing the second parameter based on the scaling factor and a second scalar quantization scheme having non-uniform step-sizes to obtain a quantized second parameter.