|
gptkbp:instanceOf
|
videophone
|
|
gptkbp:category
|
gptkb:consumer_electronics
telecommunications
video communication
|
|
gptkbp:cause
|
high cost
bulky equipment
limited video quality
low adoption
|
|
gptkbp:commercialServiceEndYear
|
1974
|
|
gptkbp:commercialServiceStartYear
|
1970
|
|
gptkbp:discontinued
|
1974
|
|
gptkbp:displayType
|
gptkb:CRT
|
|
gptkbp:exhibitedAt
|
gptkb:Smithsonian_National_Museum_of_American_History
|
|
gptkbp:feature
|
two-way audio
black-and-white video
one-way video
|
|
https://www.w3.org/2000/01/rdf-schema#label
|
AT&T Picturephone
|
|
gptkbp:influenced
|
modern videoconferencing
|
|
gptkbp:introducedIn
|
gptkb:1964_New_York_World's_Fair
1964
|
|
gptkbp:manufacturer
|
gptkb:AT&T
|
|
gptkbp:marketedAs
|
gptkb:Picturephone_Mod_I
gptkb:Picturephone_Mod_II
|
|
gptkbp:notableUser
|
gptkb:Lyndon_B._Johnson
gptkb:Richard_Nixon
|
|
gptkbp:refreshRate
|
30 frames per second
|
|
gptkbp:resolution
|
250 lines
|
|
gptkbp:servesArea
|
gptkb:Chicago
gptkb:New_York_City
gptkb:Pittsburgh
gptkb:Washington,_D.C.
|
|
gptkbp:technology
|
POTS (Plain Old Telephone Service)
analog video transmission
|
|
gptkbp:bfsParent
|
gptkb:1964_New_York_World's_Fair
|
|
gptkbp:bfsLayer
|
5
|