Magic wrote:
> If I take a sound file which is 44.1kHz in 16bit, the same as CD, and ZIP
> it
> with WinZIP, it occupies less space. If I did this with all the music from
> one of my CDs, I could probably copy those ZIP files onto another CD and
> fit
> two CDs worth of music onto it (although a normal CD player couldn't play
> it). I now have twice as much information stored on the same capacity
> disc.
>
I tried this on a partial CD image of 503 Mb, and it zipped to 481 Mb. Music
data is pseudo random (as far as WinZip is concerned) so it does not accept
much lossless compression.
And, in reply to:
>> Compression, yes runlength encoding and huffman codes can
be used to
reduce
>> the size of a the file. But they do not alter the bit
rate. In order to
>> read your Zipped files you must first decompress them,
then decode them,
>> then play them.
(I'm not sure what this means)
Wrong. ZIP files do not necessarily have to be decompresed before
you can
access their contents, it is possible to access the contents
directly if you
store the decoding table in RAM and use this as a reference for the
data you
read from the file.
Wrong (sorry). While it's correct to say that you don't have to decompress
the ZIP into a file, you do have to reverse the compression algorithm to
extract the data.
simon
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