FIELD: physics.
SUBSTANCE: decoded excitation in the time domain is converted into an excitation in the frequency domain. A weight mask is formed to reconstruct the spectral information lost in the quantization noise. The excitation in the frequency domain is modified in order to increase the dynamics of the spectrum by applying a weight mask. The modified excitation in the frequency domain is converted into a modified excitation in the time domain. The method and device can be used to improve reproduction of music content by codecs based on linear prediction (LP). Optionally, the synthesis of the decoded excitation in the time domain can be classified into one of the first set of excitation categories and the second set of excitation categories.
EFFECT: improving the quality of the encoded speech signal.
31 cl, 4 tbl, 4 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| SYSTEM AND METHOD OF ENHANCING DECODED TONAL SOUND SIGNAL | 2009 |
|
RU2470385C2 |
| CODING OF GENERALISED AUDIO SIGNALS AT LOW BIT RATES AND LOW DELAY | 2011 |
|
RU2596584C2 |
| ADAPTIVE BAND EXTENSION AND DEVICE THEREFOR | 2014 |
|
RU2641224C2 |
| AUDIO ENCODING/DECODING SCHEME HAVING SWITCHABLE BYPASS | 2009 |
|
RU2483364C2 |
| DEVICE AND METHOD FOR ENCODING/DECODING FOR HIGH-FREQUENCY BAND EXTENSION | 2011 |
|
RU2575680C2 |
| DEVICE AND METHOD FOR ENCODING/DECODING FOR EXPANSION OF HIGH FREQUENCY RANGE | 2017 |
|
RU2672133C1 |
| DEVICE AND METHOD FOR CODING/DECODING FOR EXPANSION OF HIGH-FREQUENCY RANGE | 2011 |
|
RU2639694C1 |
| METHOD AND DEVICE FOR INTRODUCING LOW-FREQUENCY EMPHASIS WHEN COMPRESSING SOUND BASED ON ACELP/TCX | 2005 |
|
RU2389085C2 |
| DECISION ON PRESENCE/ABSENCE OF VOCALIZATION FOR SPEECH PROCESSING | 2014 |
|
RU2636685C2 |
| DEVICE AND METHOD OF DECODING ENCODED AUDIO SIGNAL | 2009 |
|
RU2483366C2 |
