ex6_7_uni_u_law_quant.rar - this uniform quantisation function generate quantiser outputs, then quantise x by looking up the table. x is quantised to the output in the table which has the minmum error with x.
,2010-05-02 16:07:16,下载4次
g721.rar - This is a simplified version of the G.721 ADPCM
A description can be found on
of P.188 "Digital Compression for Multimedia"
returns the quantised speech s and the prediction error e,2010-05-02 16:01:27,下载22次
FA_quant.rar - [ya,ind,sd]=FA_quant(x,l)
This fuction performs Forward adaptive quantisation of the input vector x
using the block size specified in l
It returns the quantised signal ya, the quantised index ind for each sample of ya
and the quantiser step size sd used for each sample of ya,2010-05-02 16:00:02,下载6次
quantise.rar - perform adaptive quantisation of the parameter in
Implementation of the g.721 adaptive quantiser
of P.188 "Digital Compression for Multimedia",2010-05-02 15:58:01,下载8次
BA_quant.rar - This fuction performs backward adaptive quantisation of the input vector x
It returns the quantised signal yb, the quantised index ind for each sample of yb
and the quantiser step size ss used for each sample of yb
The algorithm commences with the step size set according to a non adaptive
unfirom quantiser,2010-05-02 15:56:36,下载2次