Patent
Method and apparatus for encoding a binary digital information signal
Hiroshi Ogawa,Tamotsu Yamagami +1 more
- 10 Sep 1982
26
TL;DR: In this article, a system for encoding a binary digital information signal comprised of 8-bit information words occurring within a frequency band to produce an encoded binary digital signal consisting of 17-bit channel words formed of 14-bit words and 3-bit separation words with the encoded signal satisfying the d-and k-constraint rules was presented.
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Abstract: A system for encoding a binary digital information signal comprised of 8-bit information words occurring within a frequency band to produce an encoded binary digital information signal comprised of 17-bit channel words formed of 14-bit information words and 3-bit separation words and with the encoded signal satisfying the d- and k-constraint rules, reducing DC imbalance and having substantially reduced components thereof in a predetermined undesirable lower frequency range of the frequency band, the system converting each 8-bit information word into a 14-bit information word; generating a set of four possible 3-bit separation words for use each 14-bit information word which satisfy the d- and k-constraint rules; determining an integrating transfer function characteristic having a high gain with respect to the predetermined frequency range; obtaining a step response by modifying each 14-bit information word and each respective possible 3-bit separation word by the integrating transfer function characteristic; evaluating the step response for a predetermined number of 14-bit information words and respective possible 3-bit separation words, either separately for each word or at the end of each possible 17-bit channel word, to obtain values including information with respect to the predetermined frequency range; selecting the possible 3-bit separation word for each 14-bit information corresponding to a respective one of the values which is closest to zero; and adding each selected 3-bit separation word to each respective 14-bit information word to produce a plurality of 17-bit channel words which form the encoded binary digital information signal.
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Citations
Patent
Data recording and/or reproducing method and data recording medium
Yoichiro Sako,Hiroshi Ogawa +1 more
- 23 Jun 1989
TL;DR: In this article, the authors proposed a method for modulating and recording data, in which the data are modulated in such a manner that m-bit data are converted into nbit data, where m and n are real integers and m < n, p-bit merging bits are inserted between the n-bits data and the number of consecutive "0"s in the alternate concatenation of these n-bit and p-bits merging bits is not less than a predetermined number d and not more than a number k which is larger than d, wherein the merging bits of
54
Patent
Method and apparatus for encoding binary data
Shinichi Tanaka
- 30 Sep 1985
TL;DR: In this article, the authors present a method and apparatus for encoding binary data in which the method includes the steps of converting data words each containing N data bits to channel words, and producing NRZI code data from the channel words.
46
Patent
Modulating method, modulating device and demodulating device
Hiroyuki C,Toshiyuki C,Takashi C +2 more
- 09 Nov 1993
TL;DR: In this paper, a modulating method for improving the digital sum value (DSV) of the coded information, modulated for transmission or recording on the recording medium, is disclosed.
44
Patent
Apparatus and method for increasing storage capacity of recording media.
George Stennis Moore
- 16 Jan 1987
TL;DR: In this article, the authors proposed a method of configuring digital information in a recording storage media so as to significantly increase the information storage capacity of the media and the media containing such configured digital information.
27
Patent
Modulating method and demodulating apparatus
Shimpuki Yoshihide,Toshiyuki Nakagawa +1 more
- 18 May 1994
TL;DR: In this article, a modulation apparatus for converting digital data having the basic data length equal to m bits into a variable length code (d, k; m, n; r) with the basic codeword length of n bits is disclosed.
15
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Peter H. Halpern
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TL;DR: In this article, a data processing system applicable for high density magnetic recording and data transmission was proposed, where digital data is translated into multi-level zero average words which occupy a greater number of time slots than the bits of the digital data which they represent, the words having increased power density in the signal spectra thereof which represent the difference between different words.
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John Michael Griffiths
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TL;DR: In this article, a method and apparatus for recoding a sequence of binary digits into a form having lower disparity for transmission and the transformation of the data back into its original form are described.
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Patent
Method and apparatus for reducing DC components in a digital information signal
Norihisa Shirota
- 23 Jul 1980
TL;DR: In this article, a method of reducing DC components in a digital information signal comprised of a plurality of 8-bit data words by converting each of the 8-bits data words to a 10-bit word was proposed.
49
Patent
Apparatus for encoding and decoding binary data in a modified zero modulation data code
Ouchi Norman K
- 01 Nov 1974
TL;DR: In this article, a modification of a zero modulation code has been proposed for processing data, which employs a waveform that is symmetrical about a zero signal level within narrow defined limits, where each data digit, 1 or 0, is encoded into two NRZI digits.
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Patent
Hardware implementation of 4-pixel code encoder
Vinod K. Kadakia,Glen D. Jones,Kedar D. Parikh,Ronald E. Rider +3 more
- 11 Apr 1980
TL;DR: In this paper, a circuit to encode image data in four bit nibbles which are either all-zero nibbles or terminating nibbles containing at least one non-zero bit is presented.
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