发明名称 |
BANDWIDTH EXTENSION FOR LOW-BAND AUDIO SIGNAL |
摘要 |
FIELD: physics, acoustics.SUBSTANCE: invention relates to means of extending the high band of an audio signal on the low band of the audio signal. Audio signal bandwidth extension includes the following steps: extracting (S1) a set of features of the low-band audio signal; comparing (S2) extracted features with at least one high-band parameter using generalised additive modelling; frequency shifting (S3) a copy of the low-band audio signal into the high band; controlling (S4) the envelope of the frequency-shifted copy of the low-band audio signal by said at least one high-band parameter.EFFECT: high efficiency of extending the bandwidth of an audio signal.13 cl, 14 dwg |
申请公布号 |
RU2568278(C2) |
申请公布日期 |
2015.11.20 |
申请号 |
RU20120125251 |
申请日期 |
2010.09.14 |
申请人 |
TELEFONAKTIEBOLAGET LM EHRIKSSON (PABL) |
发明人 |
GRANCHAROV VOLODJA;BRUN STEFAN;POBLOT KHARAL'D;SVERRISSON SIGURDUR |
分类号 |
G10L21/02 |
主分类号 |
G10L21/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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