Videophone: Difference between revisions
Added webcam reference. -Mr. Tachyon |
Grammatical error. -Mr. Tachyon |
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There's also another protocol that uses videophones and is H.324 , this is a protocol that allow videophones to work in regular phone lines , since the bandwith is limited by the phone line the quality is about 15 FPS . |
There's also another protocol that uses videophones and is H.324 , this is a protocol that allow videophones to work in regular phone lines , since the bandwith is limited by the phone line the quality is about 15 FPS . |
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Today the |
Today the principles, if not the precise mechanisms of a videophone are employed by thousands of users world-wide in the form of [[webcam]] conferences using cheaply available webcams and microphones employed using software over the internet. |
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In many [[science fiction]] [[movies]] and shows that take place in the future, videophones are used as a primary method of communication. One example of a fictional videophone is the Picturephone from [[Pee-wee's Playhouse]]. |
In many [[science fiction]] [[movies]] and shows that take place in the future, videophones are used as a primary method of communication. One example of a fictional videophone is the Picturephone from [[Pee-wee's Playhouse]]. |
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Revision as of 04:14, 3 January 2006
A videophone is a telephone which is capable of both audio and video duplex transmission.
AT&T conducted experiments and demonstrations of a "Picturephone" product and service in the early 1960s. Among the first manufacturers of commercially viable videophones was Toshiba.
Videotelephony is mostly used in large corporate setups, and are supported by systems such as Cisco CallManager. Other companies such as Tandberg, Radvision, and Polycom also offer similar solutions. Videoconferencing has generally been limited to the h.323 protocol (notably Cisco's SCCP implementation is an exception), however recently a shift towards SIP implementations is seen. In accordance with the adoption of SIP telephony for home users, videotelephony is also slowly becoming available to home users.
There's also another protocol that uses videophones and is H.324 , this is a protocol that allow videophones to work in regular phone lines , since the bandwith is limited by the phone line the quality is about 15 FPS .
Today the principles, if not the precise mechanisms of a videophone are employed by thousands of users world-wide in the form of webcam conferences using cheaply available webcams and microphones employed using software over the internet.
In many science fiction movies and shows that take place in the future, videophones are used as a primary method of communication. One example of a fictional videophone is the Picturephone from Pee-wee's Playhouse.