Cross-interleaved Reed–Solomon coding
In the
byte.Overview
error bursts up to 4000 data bits in sequence (2.5 mm in length as seen on CD surface) and compensates for error bursts up to 12,000 bits (7.5 mm) that may be caused by minor scratches.[2]
Characteristics
- High random error correctability
- Long burst error correctability
- In case the burst correction capability is exceeded, interpolation may provide concealment by approximation
- Simple decoder strategy possible with reasonably-sized external random access memory
- Very high efficiency
- Room for future introduction of four audio channels without major changes in the format (as of 2024, this has not been implemented).
Interleave
Errors found in
interleaved cross-wise. Judicious positioning of the stereo channels as well as the audio samples on even or odd-number instants within the interleaving scheme, provide the error concealment ability, and the multitude of interleave structures used on the CD makes it possible to correct and detect errors with a relatively low amount of redundancy.[3]
See also
- Multiplexing
- Parity (mathematics)
- Parity (telecommunication)
- Checksum
References
- ^ US 4413340 Inventors: Odaka K., Sako Y., Iwamoto I., Doi T.; Vries L.B.; SONY: Error correctable data transmission method (CIRC Patent) filing date May 21, 1980
- ISBN 978-0-7803-5391-6.
- ^ "Stan Hanley, Reed-Solomon Codes and CD Encoding". Archived from the original on September 17, 2018. Retrieved June 10, 2019.
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