Patent ID: 9466305
Filing Date: 2016-10-11
CPC Classification: G10L,H04S

Claim Text:
1. A method of compressing audio data comprising spherical harmonic coefficients, the method comprising: allocating a first set of bits to the spherical harmonic coefficients corresponding to a spherical basis function having an order of zero based on one or more predetermined properties of human hearing; allocating a second set of bits to the spherical harmonic coefficients corresponding to a spherical basis function having an order greater than zero using, at least in part, a bit allocation mechanism that is based on a saliency of each of the spherical harmonic coefficients corresponding to the spherical basis function having the order greater than zero; quantizing, based on the first set of bits, the spherical harmonic coefficients corresponding to the spherical basis function having an order of zero; quantizing, based on the second set of bits, the spherical harmonic coefficients corresponding to the spherical basis function having an order greater than zero; and generating an audio bitstream that includes the quantized the spherical harmonic coefficients corresponding to the spherical basis function having an order of zero and the quantized spherical harmonic coefficients corresponding to the spherical basis function having an order greater than zero.