MATLAB: Converting double values file to 2 byte per sample.

2 bytesdouble

Hi,
I have a .txt file with 128 x 11900 vlaues. These values are doubles ranging from -0.00023462 to +1.0719. I need to convert them to 2 bytes per sample and store in a .bin file. I am not getting how to do it. I tried using the 'fread' function of matlab but all I am able to do is convert each sample to 8 bytes(double precision). Is there a way I can convert each sample into 2 bytes each?

Best Answer

two_bytes = uint16(floor(YourMatrix/1.636E-5)+15);
and fwrite() as uint16 .
reconstructed = (double(two_bytes) - 15) * 1.636E-5
the reconstruction error can be up to 1.636E-5 . You can reduce the average reconstruction error by using round() instead of floor(), but then you have to work on the boundary condition (the +15 or -15) (though there happens to be just enough slack room in the representation so that it is not a problem.)
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