LOW LATENCY CODEC WITH LOW FREQUENCY EFFECTS Russian patent published in 2023 - IPC G10L19/08 

FIELD: computer engineering.

SUBSTANCE: processing audio data. Converting, using one or more processors, a filtered time domain LFE channel signal into a frequency domain representation of the LFE channel signal, which includes a number of coefficients representing the frequency spectrum of the LFE channel signal; placing, using one or more processors, the coefficients into a number of sub-band groups corresponding to different frequency bands of the LFE channel signal; quantizing the coefficients in each group of sub-bands according to the frequency response curve of the low-pass filter; encoding the quantized coefficients in each group of sub-bands using an entropy encoder configured for the group of sub-bands; and generating a bit stream including the encoded quantized coefficients; and storing the bit stream on a storage device or streaming the bit stream to a downstream device.

EFFECT: reducing the delay time by supporting spatial coding of audio data and increasing error resistance.

21 cl, 12 dwg