The data compression scheme used in a Compact Disk audio recording is:

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A. MP3
B. MPEG-4 Level 2
C. There is no data compression used.
D. Reed-Solomon encoding
E. None of these

I am convinced there is no compression used, but my friend doesn't believe me! Prove him wrong (he thinks the answer is mp3!)

― Tom Burton, Thursday, 27 May 2004 09:44 (twenty-two years ago)

D rings a bell for some reason.

― Pack Yr Romantic Almanac (Autumn Almanac), Thursday, 27 May 2004 09:46 (twenty-two years ago)

there is no compression done its PCM at 16bit with 44.1Khz

― Jarlr'mai (jarlrmai), Thursday, 27 May 2004 10:01 (twenty-two years ago)

Reed-Solomon encoding is used in a modified version called CIRC on "red book" standard audio CDs for error checking.

― Jarlr'mai (jarlrmai), Thursday, 27 May 2004 10:17 (twenty-two years ago)

It's not really compression though, it's a method for error checking and repairing.

― Chewshabadoo (Chewshabadoo), Thursday, 27 May 2004 10:53 (twenty-two years ago)

I think your friend is thinking of minidisc. iirc this uses a compression format called atrac.

― Pashmina (Pashmina), Thursday, 27 May 2004 10:59 (twenty-two years ago)

Yes, as said, it's C; D is not a codec for data reduction but a fundamental part of the compact disc system and allows blemished discs to be read bit-perfectly or near as makes no difference.

CDs have been commercially available since 1982, the MPEG I standard wasn't established until a decade later.

xpost: Pash is right about MD

― Michael Jones (MichaelJ), Thursday, 27 May 2004 11:00 (twenty-two years ago)

morans

― Be sure to Loop! Loop, Loop, Loop. (ex machina), Thursday, 27 May 2004 11:03 (twenty-two years ago)

It's not really compression though, it's a method for error checking and repairing.

I never said it was...

― Jarlr'mai (jarlrmai), Thursday, 27 May 2004 13:27 (twenty-two years ago)

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