The specifications for the compact disc and compact disc players developed by Sony, Philips, and Polygram.
A summary of this standard:
the Disc
Playing time: 74 minutes, 33 seconds maximum
Rotation: Counter-clockwise when viewed from readout surface
Rotational speed: 1.2 - 1.4 m/s. (constant linear velocity)
Track pitch: 1.6 µm
Diameter: 120 mm
Thickness: 1.2 mm
Center hole diameter: 15 mm
Recording area: 46 mm - 117 mm
Signal area: 50 mm - 116 mm
Material: Any acceptable medium with a refraction index of 1.55
Minimum pit length: 0.833 µm (1.2 m/s) to 0.972 µm (1.4 m/s)
Maximum pit length: 3.05 µm (1.2 m/s) to 3.56 µm (1.4 m/s)
Pit depth: ~0.11 µm
Pit width: ~0.5 µm
the Optical System
Standard wavelength: 780 nm (7,800 Å)
Focal depth: ± 2 µm
the Signal Format
Number of channels: 2 channels (4 channel recording possible)
Quantization: 16-bit linear
Quantizing timing: Concurrent for all channels
Sampling frequency: 44.1 kHz
Channel bit rate: 4.3218 Mb/s
Data bit rate: 2.0338 Mb/s
Data-to-channel bit ratio: 8:17
Error correction code: Cross Interleave Reed-Solomon Code (with 25% redundancy)
Modulation system: Eight-to-fourteen Modulation (EFM)