Tuesday, August 02, 2005

My height in punch cards...

is equal to enough info for a 3 minute mp3 song!
From BoingBoing:

One 3 min MP3 = 5'9" high stack of punchcards
In case you were wondering: how many punchcards it would take to store an MP3:
"Assuming a non-Hollerith encoding with eight bits per column, and an MP3 file encoded at 128kbps CBR, there would be 36,864 cards in that deck, and the card reader would need a throughput of 205 cards per second. It might be wise to include an 8-column sequence number, however, so that a misordered deck can be repaired by a card sorter; with 72 data columns per card, the total is precisely 40,960 cards (40K cards), requiring a 228 card/second throughput." The 21 boxes of cards needed would by 5 feet 9 inches tall. That such a huge leap in technology is well within living memory astonishes Y.

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