System for reproducing information from an optically readable record carrier, apparatus for use in said system, and record carrier for use in said system

摘要

A compact-disc-digital-audio-system has bandwidth reduced in order to extend the playing time, for example for the reproduction of 10 hours of speech. This is achieved without significantly modifying the existing players and without affecting the standard EFM coding, by multiplexing a plurality of information channels in such a way that they can be reproduced consecutively by repeatedly playing the entire CD disc.