Digital remote control method
First Claim
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1. A remote control method comprising the steps of:
- providing a custom code, said custom code comprising a plurality of a first number of bits indicative of a particular receiving unit, "0" and "1" bits of said custom code being distinguished by respective different time intervals between adjacent pulses;
providing an instruction code, said instruction code comprising a plurality of a second number of bits different from said first number and indicative of a predetermined operation to be carried out by said receiving unit, "0" and "1" bits of said instruction code being distinguished by the same intervals between adjacent pulses as said custom code;
providing a transmission code comprising said custom code followed by said instruction code, said custom code and said instruction code being separated from one another by a predetermined fixed time interval greater than said time intervals between adjacent pulses distinguishing said "0" and "1" bits, said predetermined fixed and time interval being a period during which a signal level remains substantially constant; and
optically transmitting said transmission code.
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Abstract
A digital remote control method in which interference among different devices is eliminated by the use of a custom code and an instruction code. In accordance with the invention, a transmission code is generated composed of an instruction code and a custom code, with the custom code and instruction code differing in the number of bits contained in each. The custom code is transmitted prior to the instruction code with an interval therebetween longer than the intervals between adjacent pulses, which intervals define data "0" and "1".
34 Citations
3 Claims
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1. A remote control method comprising the steps of:
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providing a custom code, said custom code comprising a plurality of a first number of bits indicative of a particular receiving unit, "0" and "1" bits of said custom code being distinguished by respective different time intervals between adjacent pulses; providing an instruction code, said instruction code comprising a plurality of a second number of bits different from said first number and indicative of a predetermined operation to be carried out by said receiving unit, "0" and "1" bits of said instruction code being distinguished by the same intervals between adjacent pulses as said custom code; providing a transmission code comprising said custom code followed by said instruction code, said custom code and said instruction code being separated from one another by a predetermined fixed time interval greater than said time intervals between adjacent pulses distinguishing said "0" and "1" bits, said predetermined fixed and time interval being a period during which a signal level remains substantially constant; and optically transmitting said transmission code. - View Dependent Claims (2, 3)
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Specification
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Current AssigneeMitsubishi Denki Kabushiki Kaisha (Mitsubishi Electric Corporation)
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Original AssigneeMitsubishi Denki Kabushiki Kaisha (Mitsubishi Electric Corporation)
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InventorsKobayashi, Hiroshi, Suda, Shinji
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Primary Examiner(s)Yusko, Donald J.
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Assistant Examiner(s)Holloway, III, Edwin C.
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Application NumberUS07/154,451Time in Patent Office848 DaysField of Search340/825.57, 340/825.64, 340/825.63, 340/825.52, 340/825.07, 340/825.65, 340/348, 340/870.24, 340/825.72, 340/825.56, 340/825.2 , 340/825.21, 340/825.53, 340/825.62, 340/825.69, 375/113, 375/23, 455/352, 455/353, 455/603, 455/608, 358/194.1, 370/8-10, 341/176, 341/178US Class Current340/12.17CPC Class CodesG08C 19/28 using pulse codeG08C 23/04 using light waves, e.g. inf...
