Method of magnetically recording video signals and an apparatus therefor
CA 1251558 A · Owner: Hitachi, Ltd. · Inventors: Katayama, Hitoshi; Kanada, Hidehiro; Izumita, Morishi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract:, The present invention relates to an improved 8-8 mapping table system in digitally and magnetically recording video signals. Video signals coded into natural binary codes consisting of 8 bits are converted into different binary codes consisting of 8 bits constituted by patterns in which the directly repeated number of l's or O's does not exceed a predetermined number. In these codes, the directly repeated number of l's or O's is so limited that a maximum magnetization interval is reduced in magnetically recording the signals. Therefore erroneous code is prevented from occurring in reproducing the signals.
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted March 21, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 21, 2006.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
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Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.