Compression - Re: 2-hour length, 148.50 Mhz, 1920 x 1080 progressive scan image, 1-bit object data,

Author

Re: 2-hour length, 148.50 Mhz, 1920 x 1080 progressive scan image, 1-bit object data,

Bob Myers

2006-10-30, 6:55 pm

"Radium" <glucegen1@excite.com> wrote in message
news:1161909975.320800.69460@i42g2000cwa.googlegroups.com...
> So is it possible to exist for the following to exist:
>
> A WMV file of 2-hour length, 148.50 Mhz, 1920 x 1080 progressive scan
> image, whose object data is only 1-bit in size due to massive
> compression of color-depth? [this file would be 193 bits in size
> because the the "object size" is 64 bits, the GUID is 128 bits, and the
> object data is only 1-bit]?

You still don't get it. A one-bit "file," no matter how it
was produced, can provide only one bit of information.
That SHOULD be obvious, but you're not thinking about
what it means. A single bit can convey what amounts to ONE
answer to a yes/no, or true/false sort of question - in other
words, just enough information to permit one to decide
between two and only two possible answers. That's why
people have been, in jest, talking about the multi-gigabyte
"decompression" routines your supposed "one bit" file would
require - what they really mean is that the "decompression"
program itself would have to contain all of the information
required to reconstruct either of two (and not more than two)
possible videos. Or in other words, you've just shifted the
burden of providing the information from the "video file" to
the "decompressor" - in effect, the "file" you're talking about
is just identifying which of two videos (contained elsewhere)
you want to see.

As usual, you need to learn a LOT more about the fields you're
trying to discuss (in this case, information theory and data
compression) before you leap to these absurd notions.

Bob M.

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