| 摘要 |
A system for transmitting and receiving information in the form of television signal wave, wherein there are formed binary numbers each consisting of more than two digits which correspond to letters, symbols or pictures to be transmitted, an audio subcarrier wave is frequency-modulated with electrical signals corresponding to the signals thus produced, an audio carrier wave modulated with said subcarrier wave is transmitted together with a video carrier wave and then received and demodulated, whereby said letters, symbols or pictures are printed.
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