Title:
STILL PICTURE TRANSMISSION EQUIPMENT
Document Type and Number:
Japanese Patent JPS6434082
Kind Code:
A
Abstract:
PURPOSE:To prevent the turbulence of a received image by adding the program searching signal of a special signal format to the head of image data. CONSTITUTION:At the time of receiving the image data from an opponent, an image program searching signal VDMK to indicate that the image data is followed thereafter is made into the signal format different from a transmitting path correcting signal TRCR by making the signal VDMK into a dual tone signal. Consequently, though null periods T1-T2 are generated in the correcting signal TRCR owing to an instantaneous interruption or a pulse noise, the correcting signal TRCR after the time T2 can not be taken for the program searching signal VDMK. At the time of sending the image data, at a transmitting side, a relay contact is switched to a contact at the feeding mode side of the image data, simultaneously, a calling tone signal CLTN is sent, and a receiving side is compulsorily switched to the receiving mode of the image data. Consequently, a voice signal from the transmitter of the telephone set of one's own or the opponent can not be mixed with the image data to be transmitted. Thus, an image deviation can be prevented, and a still picture can be normally transmitted and received.
Inventors:
SUDA SHINICHIRO
ITO SATOSHI
MOGI HISAO
NAKAYAMA ATSUSHI
SAITO MAKOTO
ITO SATOSHI
MOGI HISAO
NAKAYAMA ATSUSHI
SAITO MAKOTO
Application Number:
JP19112387A
Publication Date:
February 03, 1989
Filing Date:
July 29, 1987
Export Citation:
Assignee:
NIPPON TELEGRAPH & TELEPHONE
SONY CORP
SONY CORP
International Classes:
H04N7/14; H04M11/00; H04N7/12; (IPC1-7): H04N7/12; H04N7/14
Attorney, Agent or Firm:
Sada Ito