8–9 Block Code: A DC-Free Channel Code for Digital Magnetic Recording

Metadata

Publisher: SMPTE — White Plains, NY
Doc Type: Conference Paper
Content Type: Original Research
Volume: 1983, No. 20, pp. 184–195
Abstract: Channel coding is generally employed in digital magnetic recording to match certain properties of the coded sequence to the channel characteristics of the recorder. Since magnetic recorders are incapable of reproducing very low frequencies or dc content, dc-free channel codings have been primarily employed in the digital VTR's, for example 8–10 block code [1], M<sup>2</sup> [2], interleaved NRZI* [3,4], tri-level code [5] and so on. This paper describes the dc-free 8–9 block coding. The coding strategy is discussed in detail with examples of three practical methods. The properties of the 8–9 block code have been investigated both by hardware experiments and by computer simulation. The performance of this channel code is found to be better than that of the 8–10 block code when it is applied to an experimental digital VTR without any major modification to the recording and playback circuits.
Publication Date: 1983-02-01
DOI: 10.5594/M00605
Link: https://doi.org/10.5594/M00605
Author(s): H. YoshidaSony Corporation, Atsugi Plant
bio
Hirofumi Yoshida is General Manager of the Communication Systems Research and Development Division, Sony Corp. He was born in 1930 in Iwate, Japan. He received the B.S. degree in Electrical Engineering in 1953 from the University of Iwate. He joined Sony Corp., Tokyo, in 1960 as Senior Electronic Engineer, where he was involved in the development of analog audio tape recorder. From 1968 to 1978, he was Head of the Systems Research Laboratory at the Sony Research Center, Yokohama, and was involved in the research work on digital techniques in signal processing, recording and solid state imaging.
Y. HashimotoSony Corporation, Atsugi Plant
bio
Yoshilaka Hashimoto is Assistant Genera! Manager of the Communication Systems Research and Development Division, Sony Corp. He was born in 1940 in Kyoto, Japan. He received the B.S. degree in Electronic Engineering from the University of Electro-Communications, Tokyo in 1964, and joined Sony Corp. Research Division in the same year. In 1968 he received the M.S. degree in Electrical Engineering from Stanford University, California after one year study with the Scholarship from Sony Corp. From 1972 to 1978 he was involved in the research work on digital signal processing of audio and video signals at the Sony Research Center. Since 1978 he has been involved in the development of digital video processing and recording technology at Atsugi Plant.
T. ShimadaSony Corporation, Atsugi Plant
bio
Toshiyuki Shimada was born in 1954 in Osaka, Japan. He received the B.S. degree in Electronics and Communication Engineering in 1976, and the M.S. degree in Electrical Engineering in 1978 from Waseda University, Japan. He joined The Sony Research Center in 1978. Since 1979 he has been involved in the development of digital video recording technology at the Communication Systems Research and Development Division, Atsugi Plant.
Copyright: © 1983 Society of Motion Picture and Television Engineers, Inc.

Bibliographic Reference(s)

1) Baldwin J. , “Digital Television Recording with Low Tape Consumption” , IBC 1978 Record, pp 133 – 136 , 1978 . EXTERNAL
10) a, “Recent Development for Digital VTR: Channel Coding and Error Protection” , IBC 1982 Record, pp 221 – 225 , 1982 . EXTERNAL
11) Yoshida H. Eguchi T. , “Digital Video Recording Based on the Proposed Format From Sony” , Presented at the 124th SMPTE Technical Conference, November 7–12, 1982 , New York. EXTERNAL
2) Mallinson J. C. Miller J. W. , “Optimal Codes for Digital Magnetic Recording” , The Radio and Electronic Engineering , Vol. 47 , No. 4 , pp 172 – 176 , April 1977 . EXTERNAL
3) Kobayashi H. Tang D. T. , “Application of Partial Response Channel Coding to Magnetic Recording Systems” , IBM Journal of Research and Development , Vol. 14 , No. 4 , pp 368 – 375 , July 1970 . EXTERNAL
4) Yokoyama K. Nakagawa S. , “An Exprement of Channel Coding for Digital VTR” , 12th International Television Symposium, Equipment Innovation Sessions, pp 251 – 261 , Montreux, 1981 . EXTERNAL
5) Etoh Y. Mita S. Hirano Y. , “Experimental Digital VTR with Tri-Level Recording and Fire Code Error Correction” , Digital Video Vol. 3 , pp 182 – 189 , SMPTE, June 1980 . EXTERNAL
6) Tang D. T. Bahl L. R. , “Block Code a Class of Constrained Noiseless Channels” , Infermation and Control 17 , pp 436 – 461 , 1970 . EXTERNAL
7) Rooney J. A. , “Improved Rate 6/8(0,3) Code and Implementation” , IBM Technical Disclosure Bulletin , Vol. 22 , No. 5 , pp 2025 – 2032 , October 1979 . EXTERNAL
8) Cariolaro G. L. Tronca G. P. , “Spectra of block Coded Digital Signals” , IEEE Trans. Commun. Vol. COM-22 , No. 10 , pp 1555 – 1567 , October 1974 . EXTERNAL
9) Morizono M. Yoshida H. Hashimoto Y. Eguchi T. , “Digital Video Tape Recording with Increased Packing Density-Progress Report” , Television Technology in the 1980s, SMPTE, pp 34 – 44 , 1981 . EXTERNAL

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H. Yoshida, Y. Hashimoto, and T. Shimada; 8–9 Block Code: A DC-Free Channel Code for Digital Magnetic Recording, SMPTE Meetings and Conferences ( February 1983); SMPTE, 1983. Available at https://doi.org/10.5594/M00605

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H. Yoshida, Y. Hashimoto, and T. Shimada; 8–9 Block Code: A DC-Free Channel Code for Digital Magnetic Recording, SMPTE Meetings and Conferences ( February 1983); SMPTE, 1983. Available at https://doi.org/10.5594/M00605

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<span class="citation">H. Yoshida, Y. Hashimoto, and T. Shimada; <cite>8–9 Block Code: A DC-Free Channel Code for Digital Magnetic Recording</cite>, SMPTE Meetings and Conferences ( February 1983); SMPTE, 1983. Available at <a href="https://doi.org/10.5594/M00605" target="_blank" rel="noopener">https://doi.org/10.5594/M00605</a></span>

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H. Yoshida, Y. Hashimoto, and T. Shimada; 8–9 Block Code: A DC-Free Channel Code for Digital Magnetic Recording, SMPTE Meetings and Conferences ( February 1983); SMPTE, 1983
doi: 10.5594/M00605
url: https://doi.org/10.5594/M00605

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<li>
H. Yoshida, Y. Hashimoto, and T. Shimada; <cite id="bib-10-5594-m00605">8–9 Block Code: A DC-Free Channel Code for Digital Magnetic Recording</cite>, SMPTE Meetings and Conferences ( February 1983); SMPTE, 1983
<span class="doi">10.5594/M00605</span>
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