Data transmission system
AssigneeTokyo Shibaura Denki Kabushiki Kaisha
InventorsTakeo Fukuda, Kazuaki Kawabata
Life of this patent
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Abstract
Data transmitted from a local terminal to a remote terminal is converted into such a diphase data signal that a data bit of binary "0" is represented by a signal with two transitions, and a data bit of binary "1" is represented by a signal with one transition. Data transmitted from the remote terminal to the local terminal is modulated by the diphase data signal of the local terminal, and delivered to the local terminal in the form of a diphase data signal. In the local terminal, the coded diphase data signal from the remote terminal is demodulated by the diphase data signal of the local terminal, and regenerated into the transmission data of the remote terminal.
Claims5
A data transmission system for data transmission between local and remote terminals by means of a two-wire transmission line, said local terminal including a first encoder for converting binary data formed of a plurality of binary data bits into a diphase data signal having first and second portions, respectively, representing first and second binary bit states and provided, respectively, with two transitions and one transition, and a means for transmitting the diphase data signal from said first encoder to a two-wire transmission line, said remote terminal including a means for receiving said diphase data signal from said local terminal, a decoder for decoding said diphase data signal received by said receiving means into said binary data, a second encoder for converting, under the modulating influences of said diphase data signal, data to be transmitted from said remote terminal to said local terminal, thereby producing a remote terminal diphase data signal, and a means for transmitting the remote terminal diphase data signal from said second encoder to said two-wire transmission line, and said local terminal further including a means for receiving said remote terminal diphase data signal from said remote terminal, and a means for demodulating said remote terminal diphase data signal by means of said diphase data signal from said first encoder.
Dependencies are inferred from the claim text.