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Posted by Joe Smith on 07/18/06 20:41
Peter H. Coffin wrote:
> On Mon, 17 Jul 2006 02:52:02 -0700, Joe Smith wrote:
>> Summercoolness@gmail.com wrote:
>>
>>> I always wonder if Mpeg1 at 352 x 240 is quite clear with 600MB and is
>>> for 1 hour of video, then for Mpeg2, the size quadruple, and it is 2GB
>>> for an hour...
>> MPEG1 was designed to work with 1x CD-ROM drives - 1.4 Mbps.
>
> ... but 1x CD speed is 330 Kbps... Perhaps you meant 4x?
Where did you get 330 Kbps? That's not the CD's speed.
2 samples (L + R) of 16 bits each, with a sampling frequency of 44.100 KHz
= 4 bytes * 44100 = 176,400 bytes per sec = 1.411200 megabits per second.
Trivia question: Do you know where 44.1 KHz came from?
-Joe
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