JPS5791047A - Duplex communication system - Google Patents
Duplex communication systemInfo
- Publication number
- JPS5791047A JPS5791047A JP55166631A JP16663180A JPS5791047A JP S5791047 A JPS5791047 A JP S5791047A JP 55166631 A JP55166631 A JP 55166631A JP 16663180 A JP16663180 A JP 16663180A JP S5791047 A JPS5791047 A JP S5791047A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- digital signal
- signal
- hpf1
- reception section
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/66—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission for reducing bandwidth of signals; for improving efficiency of transmission
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Bidirectional Digital Transmission (AREA)
Abstract
PURPOSE:To enable a duplex signal less in deterioration of digital signal, by removing the low frequency component of a digital signal, transmitting the signal of band suited to this low frequency through synthesis, and reproducing the low frequency component removed at the reception section. CONSTITUTION:A digital signal applied to a terminal DI passes through an HPF1 and applied to a coupling circuit 3. The audio signal applied to a terminal AI passes through an LPF2 and supplied to the circuit 3. The cut off frequency of the HPF1, LPF2 is selected so that the digital signal and the audio signal are not overlapped when they are coupled at the circuit 3. The output of the circuit 3 is transmitted via an output circuit 4 and a transmission line to the reception section. The reception section consists of an input circuit 6, a separation circuit 7, an HPF8, an LPF9, a discrimination reproducing circuit 11, and a quantized feedback circuit 10 to output digital and audio signals at terminals DO and AO. When the transfer function of LPF102, HPF1, HPF8 in the circuit 10 is selected so that a prescribed relation can be satisfied, the low frequencies removed of the digital signal is reproduced, allowing to reduce the deterioration of the digital signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP55166631A JPS5791047A (en) | 1980-11-28 | 1980-11-28 | Duplex communication system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP55166631A JPS5791047A (en) | 1980-11-28 | 1980-11-28 | Duplex communication system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5791047A true JPS5791047A (en) | 1982-06-07 |
Family
ID=15834860
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP55166631A Pending JPS5791047A (en) | 1980-11-28 | 1980-11-28 | Duplex communication system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5791047A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6170827A (en) * | 1984-09-14 | 1986-04-11 | Yamatake Honeywell Co Ltd | Communication method |
-
1980
- 1980-11-28 JP JP55166631A patent/JPS5791047A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6170827A (en) * | 1984-09-14 | 1986-04-11 | Yamatake Honeywell Co Ltd | Communication method |
| JPH0467817B2 (en) * | 1984-09-14 | 1992-10-29 | Yamatake Honeywell Co Ltd |
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