LOW-FREQUENCY EMPHASIS FOR LPC-BASED CODING IN FREQUENCY DOMAIN

Abstract

The present invention provides an encoder and method for encoding a non-speech audio signal to produce a bitstream, the encoder comprising: a linear predictive coding filter (92) having a plurality of linear prediction coding coefficients (LC) (2, 3) of transformer (3), said combination (2,3) being based on a frame (FI) and outputting a spectrum (SP) based on linear predictive coding coefficients To filter the frame FI of the audio signal AS and to convert the frame FI of the audio signal AS into the frequency domain; (PS) representing a frequency lower than a reference spectral line (RSL, see FIG. 2), including a low-frequency accelerator 4 configured to calculate a processed spectrum PS based on a spectrum SP &Lt; / RTI > (see SL, FIG. 2); And a control device (5) configured to control the calculation of the spectrum (PS) processed by the low frequency emphasizer (4) in dependence on the linear prediction coding coefficients (LC) of the linear prediction coding filter . In addition, the present invention provides a corresponding audio decoder, a system, a method for decoding a bitstream comprising quantized spectra and a plurality of linear predictive coding coefficients, and a corresponding computer program.

Technology	Declaration Information	Specification Information	Explicitly Disclosed	Patent Type
4G,3G	06/03/2016	ISLD-201512-009	FRAUNHOFER SOCIETY	S1 TS Number: TS 126 445 Version No: Illustrative part: ---- Release: + -	No	Family Member

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