Patent
Method for encoding binary data
TLDR
In this paper, the authors proposed to improve recording density on a recording medium by referring data before and after 2-bit data and a code word before a 5-bit code word when converting binary data into the 5-bits code word.Abstract:
PURPOSE:To set up a minimum value to 4 and a maximum value to a prescribed value or less and to improve recording density on a recording medium by referring data before and after 2-bit data and a code word before a 5-bit code word when converting binary data into the 5-bit code word in each 2-bit data. CONSTITUTION:Original data from an input terminal 1 and a clock from a clock input terminal 2 are inputted to a 12-bit serial/parallel shift register 3, which shifts the input data sequentially and applies its outputs Q1-Q12 to an encoder 4. Encoded algorithms decided by a condition deciding circuit 9 to which the outputs of a 10-bit serial/parallel shift register 8 are inputted are applied to the encoder 4. The encoder 4 applies outputs obtained by encoding input data by prescribed algorithm to a 5-bit parallel/serial register 7. While referring the data before and after the 2-bit data and the code word before the 5-bit code word, the minimum value of the number of continuous ''1''s and the succeeding ''0''s in the converted 5-bit code word string is set up 4 and the maximum value is set up the prescribed value or less.read more
Citations
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Journal ArticleDOI
Codes for digital recorders
TL;DR: This paper surveys the theory and practice of constrained coding, tracing the evolution of the subject from its origins in Shannon's classic 1948 paper to present-day applications in high-density digital recorders.
Journal ArticleDOI
Runlength-limited sequences
TL;DR: Runlength-limited (RLL) sequences are formally defined, and the runlength distribution and spectral properties of ideal RLL sequences are analyzed.
Journal ArticleDOI
Channel coding and signal processing for optical recording systems beyond DVD
Willem M. J. M. Coene,Haralampos Pozidis,M. van Dijk,Josephus Arnoldus Henricus Maria Kahlman,R. van Woudenberg,Bert Stek +5 more
TL;DR: A new optical disc format for a real-time Digital Video Recording system (DVR) has been developed, and a new ECC code, called the picket code, was designed in order to cope with multiple long burst errors, on top of the usual random errors of the channel.
Journal ArticleDOI
A survey of codes for optical disk recording
TL;DR: This report on 20 years of development of codes for optical disk recording systems describes the state-of-the-art and feasible options for future extensions and improvements.
References
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Patent
Encoding and decoding system for binary data
TL;DR: An encoding system for binary data in particular adapted for magnetic recording/reproducing, in which the minimum and maximum values among magnetization inversion intervals are limited so as to increase the recording density, is presented in this article.