METHOD AND APPARATUS FOR DECODING COMPRESSED AUDIO REPRESENTATION OF AUDIO OR SOUND FIELD USING HOA Russian patent published in 2025 - IPC G10L19/00 

FIELD: physics.

SUBSTANCE: present invention relates to sound recording technologies. When compressing the HOA data frame representation, a gain control is applied for each channel signal before its perceptual coding. Gain values are transmitted in differential mode as side information. However, to start decoding such a streaming compressed representation of a HOA data frame, absolute gain values are required, which must be encoded with a minimum number of bits. To determine such a smallest integer (β_e) bits representation of the HOA data frame (C(k)) is reproduced in the spatial domain in the form of signals of virtual loudspeakers lying on the unit sphere, with subsequent normalization of HOA data frame representation (C(k)). Then the least integer number of bits is taken equal to: (ΑΑ).

EFFECT: providing the least integer number of bits required to represent undifferentiated gain values.

3 cl, 6 dwg