Abstract
The invention provides an audio encoder and method for encoding a non-speech audio signal so as to produce therefrom a bitstream the audio encoder comprising: a combination (2 3) of a linear predictive coding filter (2) having a plurality of linear predictive coding coefficients (LC) and a time-frequency converter (3) wherein the combination (2 3) is configured to filter and to convert a frame (Fl) of the audio signal (AS) into a frequency domain in order to output a spectrum (SP) based on the frame (Fl) and on the linear predictive coding coefficients (LC); a low frequency emphasizer (4) configured to calculate a processed spectrum (PS) based on the spectrum (SP) wherein spectral lines (SL) of the processed spectrum (PS) representing a lower frequency than a reference spectral line (RSL) are emphasized; and a control device (5) configured to control the calculation of the processed spectrum (PS) by the low frequency emphasizer (4) depending on the linear predictive coding coefficients (LC) of the linear predictive coding filter (2). Furthermore the invention provides a corresponding audio decoder a system a method for decoding a bitstream containing quantized spectrums and a plurality of linear predictive coding coefficients and a corresponding computer program.
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| 4G,3G | 06/03/2016 | ISLD-201512-009 | FRAUNHOFER SOCIETY | Yes | Basis Patent | ||||
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Explicitly disclosed patent:openly and comprehensibly describes all details of the invention in the patent document.
Implicitly disclosed patent:does not explicitly state certain aspects of the invention, but still allows for these to be inferred from the information provided.
Basis patent:The core patent in a family, outlining the fundamental invention from which related patents or applications originate.
Family member:related patents or applications that share a common priority or original filing.