Design ofaDynamic PCM Selector for Non-deterministi c Environment
Liang-Bi ChenandIng-Jer Huang, Yuan‐Long Jeang · 2006
Thequality oftransmission isveryimportant in digital communication. However,in non-deterministic environment ordifferent transmission message signal, biterror rateofPCM encoding methodologies maybebe varied according todifferent working condition ordifferent signal source. Theoretically, thebiterrorrateofPCM encoding methodology canbe computedby either mathematical or statistical methods. Thebiterrorrateisgenerally assumed asa constant value. Thebiterrorrateisnotdeterministic inthe realworld. Thispaperproposes adynamic PCM selector that candynamically select anoptimal PCM codecmodule. The systemcandynamically switch totheencoding modewith possible lowest biterrorrate, according tothecurrent typeof thetransmission. Bywayofthisdesign, itcangreatly reduce theoverheads oftheerror correction process. KeywordsPCM,PusleCodeMudulation, BER,BitError Rate, PCM codecoptimization, digital communication, speech encoding, soft IPgenerator