> You always get 120 minues in SP mode, whether you are recording your
> favorite program, static, or nothing at all. The data itself has a
> constant, quantifiable size. You can run the tape slower, to fit more
> data, but quality drops in proportion to speed. Sounds exactly like lossy
> compression to me: less quality, more data in a given quantity of media.
Depending on the quality of the magnetic media on the tape, running in EP
mode will not suffer in quality.
How is it lossy compression ? What is being compressed ? Can you explain
why the quality suffers ? I don't think the VCR is performing lossy
compression. The quality drop is due to the magnetic media. And no, the
media is not perform analog compression. It if was claimed it is, then it's
saying that an el cheapo 60min no-name audio tape after playback 10 times
was compressing since the quality now sucks.
> My point was never about whether or not it is generally considered to be
> compression, because it obviously isn't. The point is whether or not it
> actually *is* compression.
?! Does this even make sense ? A to D, is not compression period.
> Is reducing the "size" of analog data somehow not compression? Would your
> professor care to explain why reducing the size of analog data is not
> compression?
How do you reduce the size of analog data ? What is the size of analog data
? Like I said before, size of analog data is not defined.
Regarding your point about density defining analog data size. You
conveniently deleted my point about 74 vs 80min MDs. density is different,
yet no compression took place.
WZ
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