Voice and image signal transmission method using code output
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United States of America Patent
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Nov 4, 2003
Grant Date -
N/A
app pub date -
Oct 22, 1999
filing date -
Feb 12, 1997
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method employing multisignal encoded start pulses and end pulses for data transmission by use of radio waves, carries out encoding so that a very large number of kinds of patterns (not less than 10.sup.14 kinds are possible) can be effected with one frequency. In the binary system, encoding needs a large number of signal pulses and high frequency, and the frequency of the carrier wave becomes very high also. The multisignal method of this invention makes it possible to reduce the encoding bits and the carrier wave frequency by using level sensing and width comparison techniques. This method also removes noise owing to its level sensing and width comparison techniques which have not been used in conventional digital communication systems. Therefore, the reception of erroneous information, the occurrence of unclear audio-visual images, and noise trouble are prevented in the use of radio waves.
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