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公开(公告)号:WO2013143221A1
公开(公告)日:2013-10-03
申请号:PCT/CN2012/075924
申请日:2012-05-23
IPC: H03M7/00
CPC classification number: G10L19/167 , G10L19/002 , G10L19/0204 , G10L19/06 , G10L19/26 , H04L5/06 , H04L27/2602
Abstract: 本发明实施例提供了用于信号编码和解码的方法和设备。所述用于信号编码的方法包括:根据输入信号得到频域信号;按照预定分配规则将预定比特分配给所述频域信号;在有比特分配的频域信号的最高频率大于预定值的情况下,调整频域信号的比特分配;根据频域信号的比特分配对频域信号进行编码。
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公开(公告)号:WO2012149843A1
公开(公告)日:2012-11-08
申请号:PCT/CN2012/072778
申请日:2012-03-22
IPC: G10L19/02
CPC classification number: G10L19/032 , G10L19/002 , G10L19/0204 , G10L19/028
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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
Applicant: 华为技术有限公司 , 西安电子科技大学 , 马鸿飞 , 郭庆巍 , 张海波 , 张波 , 许丽净 , 张清 , 许剑峰 , 李伟 , 杜正中 , 胡晨 , 杨毅 , 苗磊 , 齐峰岩
IPC: H04N7/52
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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