JPS5753132A - Transmission system for widening voice band and shortening time - Google Patents
Transmission system for widening voice band and shortening timeInfo
- Publication number
- JPS5753132A JPS5753132A JP55128097A JP12809780A JPS5753132A JP S5753132 A JPS5753132 A JP S5753132A JP 55128097 A JP55128097 A JP 55128097A JP 12809780 A JP12809780 A JP 12809780A JP S5753132 A JPS5753132 A JP S5753132A
- Authority
- JP
- Japan
- Prior art keywords
- voice
- circuit
- signal
- data
- transmission
- 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
- H04M—TELEPHONIC COMMUNICATION
- H04M11/00—Telephonic communication systems specially adapted for combination with other electrical systems
- H04M11/06—Simultaneous speech and data transmission, e.g. telegraphic transmission over the same conductors
- H04M11/064—Data transmission during pauses in telephone conversation
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Time-Division Multiplex Systems (AREA)
- Reduction Or Emphasis Of Bandwidth Of Signals (AREA)
Abstract
PURPOSE:To transmit other signals in an idle time due to time compression of a voice waveform and to transmit plural signals simultaneously in real time without degradation of the quality of voice. CONSTITUTION:The voice output of a four-wire telephone set 21 is supplied to a voice time compressing circuit 31 and is made into a signal of 4k or less Hz by an LPF32 to obtain a voice signal 11. A sampling circuit 33, an encoding circuit 34, a buffer memory 35, a decoding circuit 36, and an LPF37 are used in order for the voice signal 11 to obtain a voice transmission signal 16. Meanwhile, output data 12 from a data terminal 22 is stored temporarily in a buffer memory 39 in a data transmitting circuit 38, and phase information and data 12 are obtained as the output of the buffer memory 39 and have the band limited up to 8k or less Hz by a low- pass filter 41 and are synthesized with the voice transmission signal 16 to obtain a transmission waveform from the terminal, and the transmission waveform is transmitted to a transmission line 24 of subscriber's lines through a hybrid circuit 42.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP55128097A JPS5753132A (en) | 1980-09-16 | 1980-09-16 | Transmission system for widening voice band and shortening time |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP55128097A JPS5753132A (en) | 1980-09-16 | 1980-09-16 | Transmission system for widening voice band and shortening time |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5753132A true JPS5753132A (en) | 1982-03-30 |
Family
ID=14976314
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP55128097A Pending JPS5753132A (en) | 1980-09-16 | 1980-09-16 | Transmission system for widening voice band and shortening time |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5753132A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60254891A (en) * | 1984-05-31 | 1985-12-16 | Fujitsu Ltd | Speech and data communication system |
JPS6112154A (en) * | 1984-06-27 | 1986-01-20 | Nec Corp | Terminal equipment control system in telephone exchange |
JPS63120535A (en) * | 1986-09-26 | 1988-05-24 | サイコム コーポレーション | Accurate multiplexed receiver of analog and digital data through narrow channel |
JPH01181344A (en) * | 1988-01-14 | 1989-07-19 | Nec Corp | Radio communication system |
-
1980
- 1980-09-16 JP JP55128097A patent/JPS5753132A/en active Pending
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60254891A (en) * | 1984-05-31 | 1985-12-16 | Fujitsu Ltd | Speech and data communication system |
JPS6112154A (en) * | 1984-06-27 | 1986-01-20 | Nec Corp | Terminal equipment control system in telephone exchange |
JPS63120535A (en) * | 1986-09-26 | 1988-05-24 | サイコム コーポレーション | Accurate multiplexed receiver of analog and digital data through narrow channel |
JPH01181344A (en) * | 1988-01-14 | 1989-07-19 | Nec Corp | Radio communication system |
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