JPS5789370A - Simultaneous transmission system for sound and hand- written character pattern - Google Patents

Simultaneous transmission system for sound and hand- written character pattern

Info

Publication number
JPS5789370A
JPS5789370A JP16523780A JP16523780A JPS5789370A JP S5789370 A JPS5789370 A JP S5789370A JP 16523780 A JP16523780 A JP 16523780A JP 16523780 A JP16523780 A JP 16523780A JP S5789370 A JPS5789370 A JP S5789370A
Authority
JP
Japan
Prior art keywords
sound
signal
outputted
terminal
line
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
Application number
JP16523780A
Other languages
Japanese (ja)
Inventor
Kenji Akiyama
Tomio Kishimoto
Yuichi Sato
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Telegraph and Telephone Corp
Original Assignee
Nippon Telegraph and Telephone Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Priority to JP16523780A priority Critical patent/JPS5789370A/en
Publication of JPS5789370A publication Critical patent/JPS5789370A/en
Pending legal-status Critical Current

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

Abstract

PURPOSE:To transmit sounds and patterns simultaneously without degrading the sound quality, by transmitting only the sound signal during a sound presence time and by multiplexing the silent sound signal and the picture signal in frequency division and transmitting them when the sound absence time is detected. CONSTITUTION:The sound signal from a sound input terminal 1 and a sound wignal 8 which is extracted by eliminating the picture signal band from a line input signal by a filter 16 are inputted to a sound absence time detector 14. When the detector 14 detects that these two input signals are silent, contacts of switches 13, 17, and 18 are connected to the (b) side through a control circuit 21, and the sound input signal and the picture signal are multiplexed in frequency division by a mixer 12 and are outputted to a sound line terminal 20 through a hybrid matching equipment 19. A line-side sound input signal 4 is separated into the sound signal and the picture signal by filters 15 and 16 and are outputted to terminals 6 and 3. Meanwhile, during the sound presence time, contacts of switches are connected to the (a) side, and the sound input signal is outputted to the terminal 20 as it is.
JP16523780A 1980-11-26 1980-11-26 Simultaneous transmission system for sound and hand- written character pattern Pending JPS5789370A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16523780A JPS5789370A (en) 1980-11-26 1980-11-26 Simultaneous transmission system for sound and hand- written character pattern

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16523780A JPS5789370A (en) 1980-11-26 1980-11-26 Simultaneous transmission system for sound and hand- written character pattern

Publications (1)

Publication Number Publication Date
JPS5789370A true JPS5789370A (en) 1982-06-03

Family

ID=15808460

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16523780A Pending JPS5789370A (en) 1980-11-26 1980-11-26 Simultaneous transmission system for sound and hand- written character pattern

Country Status (1)

Country Link
JP (1) JPS5789370A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5975749A (en) * 1982-10-25 1984-04-28 Nippon Signal Co Ltd:The Separating method between data signal and voice signal
WO2001057634A1 (en) * 2000-02-05 2001-08-09 Xiu Bin Yu Method for encoding character information, method for imparting encoding element of character information to key element, and information apparatus

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5975749A (en) * 1982-10-25 1984-04-28 Nippon Signal Co Ltd:The Separating method between data signal and voice signal
WO2001057634A1 (en) * 2000-02-05 2001-08-09 Xiu Bin Yu Method for encoding character information, method for imparting encoding element of character information to key element, and information apparatus

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