H - Electricity – 03 – M
Patent
H - Electricity
03
M
354/67
H03M 7/20 (2006.01) G11B 7/013 (2006.01) G11B 20/10 (2006.01) G11B 20/14 (2006.01) H04L 25/49 (2006.01)
Patent
CA 1209265
ABSTRACT OF THE DISCLOSURE 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 with 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.
411153
Ogawa Hiroshi
Yamagami Tamotsu
Gowling Lafleur Henderson Llp
Sony Corporation
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