摘要
依据数字编码理论对几种光盘编码调制的结构参数性能进行了比较,着重分析了光盘的两种信道编码记录方式:用于磁光(MagnetoOpticaldisk-MO)光盘的游程长度受限(RunLengthLimimted)脉宽调制(PulseWidthModulation)[RLL(1,7)-PWM]记录方式,及用于相变(PhaseChange-PC)光盘的游程长度受限(RunLengthLimimted)脉位调制(PulsePositionModulation)[RLL(2,7)-PPM]记录方式,并结合记录介质的特点,阐明了两者并存的原因.
An analysis of the RLL(1,7) PWM method for Magneto Optical(MO) disks and the RLL(2,7) PPM method for Phase Change(PC) disks with the coding theory of digitalrecordings is presented.The reasons why they exist simultaneously in the light of the characteristics of recording media are discussed.
出处
《北京航空航天大学学报》
EI
CAS
CSCD
北大核心
1997年第4期435-439,共5页
Journal of Beijing University of Aeronautics and Astronautics
关键词
信道编码
编码理论
结构参数
脉宽调制
光盘
coding
coding theory
structure parameters
RLL(1,7) PWM
RLL(2,7) PPM
optical disk