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In Reply to: Example disc space calculation posted by Christine Tham on October 25, 2004 at 01:19:12:
Actually, DVD-5 capacity is: (4.7 * 1,000,000,000 * 8) bits,
not: (4.4 * 1,000,000,000 * 8) bits (approx).This is a common confusion/pitfall which often arises when attempting to state DVD (and CD) media capacities because from IT speak we were taught that 1Gigabyte is:-
(1024*1024*1024 * 8) bits, hence the need for IT folks to re-express 4.7Gigabytes (DVD capacity) as approx 4.4Gigabytes (IT speak).So, given that our data-rate numbers are based on bits-per-second arithmetic (and not multiples of "1,024 bytes"), then all the DVD capacities should be factored likewise.
Therefore, when us audio folks talk of DVD capacities (as opposed to IT folks with the number "1024" on the brain), a "megabyte" should mean a straight eight million bits (one million bits times eight).
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Follow Ups
- Assumption confusion . . . - Martin419 06:26:07 10/25/04 (4)
- No. I deliberately left the 300MB for authoring overhead ... (nt) - Christine Tham 13:43:00 10/25/04 (3)
- Now c’mon Christine . . . - Martin419 14:10:46 10/25/04 (2)
- I must also point out the 300MB overhead is based on my own experience ... - Christine Tham 14:43:08 10/25/04 (0)
- You missed out on "(excluding menus and overheads)" in the post (nt) - Christine Tham 14:15:20 10/25/04 (0)
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