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Posted by Jukka Aho on 10/01/05 07:04
AnthonyR wrote:
> "Jona Vark" <noemail@all.com> wrote
>
>> Pay attention! I was talking about getting a 125Mb/s data down a
>> 25Mb/s format (DV).
> There's something fishy with these numbers somewhere. While Tony is
> right that the Toaster captures incompressed video
> at around 22mb/s and dv is compressed at 5 to 1, I always thought the
> actual data rate needed was only around 3.6 mb/s for mini dv video/
> Someone I think mistaking some number here somewhere. Any pros have
> the answer?
Bits are not bytes. Mbit/s is not the same as MB/s.
One byte (octet) is 8 bits.
25 Mbit/s (or Mbps, or Mb/s, or mega_bits_ per second) equals to 3.125
MB/s (mega_bytes_ per second). Whatever more there is to it must be
either overhead from wrapper formats and such, or a notational
discrepancy (sometimes megabytes are counted as 1000*1000 bytes,
sometimes as 1024*1024 bytes, sometimes you see truncated byte counts
represented with decimal points as if they were decimal numbers etc.).
Or both.
--
znark
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