?? zhe13.m
字號(hào):
function y = zhe13(x)
%本函數(shù)實(shí)現(xiàn)國(guó)際通用的PCM量化A律13折線特性近似
x = x/max(x);
z = sign(x);
x = abs(x);
for i = 1:length(x);
if((x(i) >= 0)&(x(i) < 1/64))
y(i) = 16*x(i);
else if((x(i) >= 1/64)&(x(i) < 1/32))
y(i) = 8*x(i)+1/8;
else if((x(i) >= 1/32)&(x(i) < 1/16))
y(i) = 4*x(i)+2/8;
else if((x(i) >= 1/16)&(x(i) < 1/8))
y(i) = 2*x(i)+3/8;
else if((x(i) >= 1/8)&(x(i) < 1/4))
y(i) = x(i)+4/8;
else if((x(i) >= 1/4)&(x(i) < 1/2))
y(i) = 1/2*x(i)+5/8;
else if((x(i) >= 1/2)&(x(i) <= 1))
y(i) = 1/4*x(i)+6/8;
end;
end;
end;
end;
end;
end;
end;
end;
y = z.*y;
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