AUDIO ENCODING METHOD AND DEVICE Russian patent published in 2024 - IPC G10L19/16 G10L21/38 

FIELD: physics.

SUBSTANCE: invention relates to computer engineering for processing audio data. Technical result is achieved by determining the spectrum reservation flag of each frequency bin of the high-frequency band signal, wherein the spectrum reservation flag indicates whether the first spectrum corresponding to the frequency bin is reserved in the second spectrum corresponding to the frequency bin, wherein the first spectrum comprises a spectrum corresponding to a frequency bin, prior to bandwidth extension coding, and the second spectrum comprises a spectrum corresponding to the frequency bin, after bandwidth extension coding; performing second encoding on the high-frequency band signal based on the spectrum reservation flag of each frequency bin of the high-frequency band signal to obtain a second encoding parameter of the current frame, wherein the second encoding parameter indicates information on the target tonal component of the high-frequency band signal, and the tonal component information contains location information, quantity information and amplitude information or energy information of the tonal component.

EFFECT: high efficiency of encoding an audio signal in a limited pass band.

22 cl, 9 dwg