matlab 改变音频比特深度

思想是:按比例扩大或缩放音频区域

function [voice_change]=change_bit(voice,before_bit,later_bit) [m,n]=size(voice); voice_change=voice; for i=1:m for j=1:n voice_change(i,j)=floor((voice(i,j)*2^(before_bit))/(2^(before_bit-later_bit)))*2^(-later_bit); %这里只针对是音频,因为音频是在-1,1波动 end end end