Journal of the Institute of Electronics Engineers of Korea CI (전자공학회논문지CI)

The Institute of Electronics and Information Engineers (대한전자공학회)
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Crosserase and Crosstalk Effects on Readout Signal of Digital Versatile Disks

Crosserase와 crosstalk이 DVD 재생 신호에 미치는 영향

  • Park, Yeon-Soo (Samsung Electronics Co. Digital Media Business) ;
  • Kim, Ji-Won (School of electronic engineering, College of engineering, Soongsil university) ;
  • Jo, Soon-Chul (School of electronic engineering, College of engineering, Soongsil university)
  • 박연수 (삼성전자 디지털미디어총괄) ;
  • 김지원 (숭실대학교 정보통신전자공학부) ;
  • 조순철 (숭실대학교 정보통신전자공학부)
  • Published : 2001.07.25
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Abstract

Readout signal of high density DVD-RAM disk output was simulated to analyze the effect of crosserase and crosstalk to the readout signal which is one of the main difficulties to realize high density DVD-RAM system having single side recording density of 4.7 G13 and 15 G13 media. Laser beam intensity impinged on the disk was approximated as Gaussian and recorded marks were assumed elliptical and the readout signal was calculated as a two dimensional convolution of laser beam pattern and recored mark pattern. From the readout signal obtained by varying crosserase ratio, carrier levels with period of 3T to 11 T were calculated and compared. Jitter due to crosserase and crosstalk was calculated and compared using 1,000 random marks having 3T to 11T period. The results showed that the jitter due to crosserase turned out to be smaller than the jitter due to crosstalk.

고밀도 기록매체인 DVD RAM 시스템에서 단면 기록밀도 4.7 GB, 15 GB 매체 개발 실현에 가장 큰 걸림돌로 작용하고 있는 crosserase 및 crosstalk 현상이 재생 신호에 미치는 영향을 분석하기 위해 4.7 GB 및 15 GB 규격으로 재생 신호를 시뮬레이션 하였다. 디스크에 조사된 빔의 강도는 Gaussian으로 근사화하고 기록된 마크는 타원형 마크로 가정하였으며, 재생신호는 Gaussian 빔 패턴과 마크 패턴의 이중 적분으로 계산되었다. Crosserase 정도를 변하여 얻어진 재생 신호로부터 주파수 분석을 통하여 3T-11T 마크의 carrier level의 크기를 구하여 비교하였다. 1,000개의 3T-11T 랜덤 마크로 부터 crosserase 및 crosstalk 에 의한 지터를 계산하여 비교한 결과, crosserase에 의한 지터가 crosstalk에 의한 지터 보다 상대적으로 작음을 확인할 수 있었다.

Keywords

References

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