CD redbook technical details.

The redbook specifies the physical parameters and properties of the CD , the optical "stylus" paremeters , deviations and error rate , modulation system and error correction , and subcode channels and graphics.

It also specifies the form of digital audio encoding ( two channel 16-bit pcm clocked at 44100 hz).These parameters have become something of a defacto standard.

Bit rate = 44100 samles/s x 16 bit/sample x 2 channels =  1411.2 kbit/s ( more than 10mb per minute)

On the disc the data is stored in sectors of 2352 bytes each, read at 75 sector/s.Onto this is added the overhead of EFM, CIRC, L2 ECC and so on, but these are not typically exposed to the application reading the disc.

By comparison, the bit rate of a "1x" data CD is defined as 2048 bytes/sector x 75 sector/s = exactly 150 KiB/s = about 8.8mb per minute.

Copy protection on CD's on the other hand infinges on the above , hence its problems with some CD players.

Hence "CD digital audio" by definition does not have to conform to the redbook standard, but the Music industry and its CD releases are supposed to.

CD is an optical recording format which can be used for all sorts of recording and encoding IE Sony superbit and HDCD or 96khz, are these redbook ?

Audio CD transport = 10mb per minute ? CD-rom Data transport = 8.8mb per minute ? does this apply to todays computer drives ? I dont know but it would be interesting to know.Are we sure of the strict specifications of CD mechs ?