Webopedia on Google+Webopedia on TwitterWebopedia on FacebookTech Bytes Blog
Main » TERM » E »

Eight-to-Fourteen Modulation

Eight-to-Fourteen Modulation, or EFM as it is abbreviated, is an encoding technique used by CDs and provides a way of countering errors by encoding a byte into 2 bytes. Using EFM the data is broken into 8-bit blocks (bytes). Each 8-bit block is translated into a corresponding 14-bit codeword using a predefined lookup table. The 14-bit codeword are chosen so that binary ones are always separated by a minimum of two and a maximum of ten binary zeroes. EFM maximizes the number of transitions possible with an arbitrary pit and land length which is determined by the wavelength of the laser light used to read the data. Eight-to-Fourteen Modulation uses an RLL encoding scheme.






TECH RESOURCES FROM OUR PARTNERS
DID YOU KNOW?
Taking Ownership through Digital Governance

Taking ownership of our own misjudgments or simple forgetfulness takes a healthy amount of humility and some honest self-assessment. Yet sometimes... Read More »

Have We Become a World of Addicts?

It's hard to imagine our lives without smartphones. But people who suffer separation anxiety when they don't have their phones nearby may be in... Read More »

13 Best Free Android Apps

From secure messaging to document editing, our top free must-have apps have been rated, reviewed and named the best free Android apps of 2015. Read More »

QUICK REFERENCE
29 Free Android Apps for Cash-Strapped Students

From wacky alarm clocks to lecture hall tools and after class entertainment, these Android apps are a good fit for a student's life and budget. Read More »

Network Fundamentals Study Guide

A network is a group of two or more computer systems or devices, linked together to share resources, exchange files and electronic communications.... Read More »

Computer Architecture Study Guide

This Webopedia  study guide describes the different parts of a computer system and their relations. Read More »