高频重建方法、编码模块和解码模块

    公开(公告)号:WO2009089728A1

    公开(公告)日:2009-07-23

    申请号:PCT/CN2008/073728

    申请日:2008-12-25

    CPC classification number: G10L21/038

    Abstract: A method for high frequency band replication, which comprises: to filter the audio or voice signal to gain the low frequency sub-band and the high frequency sub-band; to determine the strategy of spectral band replication; to gain the correlation between said low frequency sub-band and high frequency sub-band according to said determined strategy of spectral band replication, and to select the low frequency sub-band as the replication frequency band for the high frequency sub-band according to said correlation, and to output the information of high frequency band replication parameters which includes the correspondence relation of the selected frequency band. The present invention else provides a method for high frequency band replication, which comprises: to receive the information of high frequency band replication parameters which includes the correspondence relation of the selected frequency band, and said correspondence relation of the selected frequency band is the relation between the high frequency sub-band and the corresponding low frequency sub-band thereof, which is determined by the correlation; In the high band, to replicate the high frequency sub-band by the low frequency sub-band according to said information of high frequency band replication parameters which includes the correspondence relation of the selected frequency band. Accordingly, the present invention provides a coder and decoder. The solution of the embodiment of the present invention can fulfill the high frequency replication more exactly.

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