> All other things being equal, 16-bit linear PCM takes up less
> space on a CD
> than analog audio does; cf CD-Video (not to be confused with
I have not seen an analog audio on CDs. If you sample the analog audio at a
higher freq. or with a smaller resolution, it won't fit on a traditional CD.
You still haven't shown how to measure the size of analog data.
> sampling process has made the data smaller. Playback of the PCM
> data is in
> most cases almost indistinguishable from the analog original. This meets
To your ears maybe, but if you look at the waveform on a oscilloscope, the
data is far from close to the analog data.
> Another example: cellular vs. digital pcs. Same absolute bandwidth. No
What are you talking about ? digital pcs _IS_ cellular. Which digital PCS
technology are you refering to ? CDMA, TDMA, GSM ? The "bandwidth" is not
fixed. It is a design constraint.
> conventional compression. Yet you can get several times more effective
No conventional compression ? You obviously have no idea what you're
talking about. Cellular uses codecs (coder/decoder) which encodes the data
(in a wireless system, reduces the bit rate, and also adds redundancy for
error correction), which is then modulated through the channel (air). The
decoder's responsibility is to reconstruct the data by the received data,
correct any errors, and convert them back to the analog domain known as
speech. The encoding process among other things _DO_ compress the data, and
the effects are quite obvious. Try playing music through the cell phone.
> making a thing smaller. I have cited references where feasable
> (admittedly
> not many, but enough). I have cited examples of A vs. D, where D is
Your references all have fundamental flaws that everyone has pointed out.
You refuse to open your mind and listen to what people are saying but you
are entitled to your opinion. Once you finish high school/University you'll
be singing a different song.
WZ
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