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From Wikipedia's page on Compact Disc Digital Audio: Each audio sample is a signed 16-bit two's complement integer, with sample values ranging from −32768 to +
by goldcountry 11y ago
From Wikipedia's page on Compact Disc Digital Audio:
Each audio sample is a signed 16-bit two's complement integer, with sample values ranging from −32768 to +32767. The source audio data is divided into frames, containing twelve samples each (six left and right samples, alternating), for a total of 192 bits (24 bytes) of audio data per frame.
https://en.wikipedia.org/wiki/Compact_Disc_Digital_Audio#Data_encoding https://en.wikipedia.org/wiki/Compact_Disc_Digital_Audio#Dat...
- pherq 11y agoThat has nothing to do with the bitrate -- the fact that you're getting a different unit on your 192 should be in an indication (bits or bits/frame, as opposed to kilobits/second). CDs store audio as 16 bit samples, with 44100 samples per second. This gives a bitrate of 16 bits * 44100 Hz = 705600 bits/second (705.6 Kbps). This is per channel, so the total bitrate of the format is 1411.2 kbps, as stated (modulo rounding) by the GP. EDIT: in fact, the article you link specifically says (a couple sections further down) that the bitrate is 1411.2 kbps.
- omribahumi 11y agoThis means CDs should have ~800MB of usable space. Why only 700MB? 705600 * 2 = 1411200 # bits/s for stereo channel 80 * 60 = 4800 # seconds in 80 minutes 1411200 * 4800 = 6773760000 # bits in a 80 minutes CD 6773760000 / 8 / 1024 /1024 = 807 # In MB
- dagw 11y agoError correction. While a 'raw' redbook CD can hold ~850 MB, it is standard to included error correction codes so that a slightly scratched CD can still work.