ITE Technical Report
Online ISSN : 2424-1970
Print ISSN : 1342-6893
ISSN-L : 1342-6893
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25.26
Displaying 1-9 of 9 articles from this issue
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  • [title in Japanese]
    Article type: Cover
    Pages Cover1-
    Published: March 09, 2001
    Released on J-STAGE: June 23, 2017
    DOIhttps://doi.org/10.11485/itetr.25.26.0_Cover1
    CONFERENCE PROCEEDINGS FREE ACCESS
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  • [title in Japanese]
    Article type: Index
    Pages Toc1-
    Published: March 09, 2001
    Released on J-STAGE: June 23, 2017
    DOIhttps://doi.org/10.11485/itetr.25.26.0_Toc1
    CONFERENCE PROCEEDINGS FREE ACCESS
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  • A Read/Write Experiment without Multiple Pulses of Phase Change Optical Disk at High Transfer Rate
    K. Ishikawa, M. Kishida, K. Kamijyo, H. Tokumaru, H. Okuda
    Article type: Article
    Session ID: MMS2001-29
    Published: March 09, 2001
    Released on J-STAGE: June 23, 2017
    DOIhttps://doi.org/10.11485/itetr.25.26.0_1
    CONFERENCE PROCEEDINGS FREE ACCESS
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    In broadcasting stations, the data transfer rate of phase change optical disk systems for HDTV must be more than 100 Mbps. A conventional phase change disk system must drive a laser diode with multiple pulses in order to record data. However, this requires a large circuit if the data transfer rate is more than 100Mbps. So high linear velocity must be needed for high transfer rate. It is expected that same cooling effects as adding multiple pulses appear at high linear velocity. The result of a read/write experiment without multiple pulses that a bit error rate of about 10^<-6> was obtained at 100 Mbps when random data was recorded onto a phase change disk without multiple pulses with using RLL(1, 7)code and PRML at a read/write linear velocity of 25 m/s.
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  • A PRML Channel for a high-transfer-rate optical disk
    Masahiko Kishida, Kiyohiko Ishikawa, Koji Kamijo, Haruki Tokumaru, Har ...
    Article type: Article
    Session ID: MMS2001-30
    Published: March 09, 2001
    Released on J-STAGE: June 23, 2017
    DOIhttps://doi.org/10.11485/itetr.25.26.0_7
    CONFERENCE PROCEEDINGS FREE ACCESS
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    An HDTV optical disk camera system needs to be established. To realize such a system, high-transfer-rate of more than 100 Mbps per channel is required. We measured the transfer function of the optical disk channel in order to make simulation software. Through the simulation and the recording experiments, we have confirmed that the RLL(1, 7)coding and PR(1, 1, 1)ML channel are suitable for the high-transfer-rate optical disk system. In the recording experiment, bit error rate of less than 10^<-5> is achieved
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  • Performance Evaluation of PRML Systems for Advanced Optical Disks
    Takatoshi Kato, Hideyuki Yamakawa, Yukari Katayama, Takushi Nishiya
    Article type: Article
    Session ID: MMS2001-31
    Published: March 09, 2001
    Released on J-STAGE: June 23, 2017
    DOIhttps://doi.org/10.11485/itetr.25.26.0_13
    CONFERENCE PROCEEDINGS FREE ACCESS
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    The perfomance comparison of the various partial-response-maximum-likelihood(PRML)systems for advanced optical recording is described. The bit-error-rate(BER)performances of PR(1, 1, 1, 1)ML, PR(1, 2, 2, 1)ML, PR(1, 3, 3, 1)ML, PR(3, 4, 4, 3)ML systems for EFMPlus code and rate 8/14 ARL code are obtained by computer simulation. The BER performance of the rate 8/14 ARL code is superior to that of the EFMPlus code. The best PR targets for the EFMPlus code and rate 8/14 ARL code are PR(3, 4, 4, 3)and PR(1, 2, 2, 1), respectively. The rate 8/14 ARL code has a 0.7-dB gain in the required SNR, compared to the EFMPlus code, and is more robust against tilt and defocus than the EFMPlus code.
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  • Asymmetrical DC control code for optical disks
    Yukari Katayama, Takatoshi Kato, Takushi Nishiya, Hideyuki Yamakawa, S ...
    Article type: Article
    Session ID: MMS2001-32
    Published: March 09, 2001
    Released on J-STAGE: June 23, 2017
    DOIhttps://doi.org/10.11485/itetr.25.26.0_19
    CONFERENCE PROCEEDINGS FREE ACCESS
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    A new run-length-limited(RLL)code for optical disks is described. It is an asymmetrical(d_0, d_1)=(2, 1)code, i.e., its minimum mark length is three channel bits to maintain the read back signal power, and its minimum space length is two channel bits to maintain the partial-response maximum likelihood(PRML)performance. It encodes 8 user bits into 14 channel bits, i.e., it has a better window size. Compared with the EFMPlus code, the ARL code has a 0.7dB gain in the required SNR at a BER of 10^<-4>. The power spectal density in the servo frequency band is -23dB.
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  • Product code interleaved in each row for optical disks
    Shigeki Taira, Taku Hoshizawa, Osamu Kawamae, Hideyuki Yamakawa, Yukar ...
    Article type: Article
    Session ID: MMS2001-33
    Published: March 09, 2001
    Released on J-STAGE: June 23, 2017
    DOIhttps://doi.org/10.11485/itetr.25.26.0_25
    CONFERENCE PROCEEDINGS FREE ACCESS
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    A new error-correcting code(ECC)for optical disks is proposed. It is based on a product code, and symbols in each row are interleaved using individual interleaving rules. Maintaining code rate and error-correcting performance for random errors and long burst errors, the proposed product code is more effective for short burst errors than a conventional product code.
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  • [title in Japanese]
    Article type: Appendix
    Pages App1-
    Published: March 09, 2001
    Released on J-STAGE: June 23, 2017
    DOIhttps://doi.org/10.11485/itetr.25.26.0_App1
    CONFERENCE PROCEEDINGS FREE ACCESS
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  • [title in Japanese]
    Article type: Cover
    Pages Cover2-
    Published: March 09, 2001
    Released on J-STAGE: June 23, 2017
    DOIhttps://doi.org/10.11485/itetr.25.26.0_Cover2
    CONFERENCE PROCEEDINGS FREE ACCESS
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