Telecommunications system and method
September 12, 2010. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesPictorial information processing technique Video telephone Simultaneous audio and video transmission with restricted bandwidth Communication system Video-telephone communications system System and method for transmitting image data on a telephone network or equivalent Still picture picturephone communications system Image transmission system Video telephone Dynamic image transmission system Patent #: 4996594 InventorsApplicationNo. 582267 filed on 09/12/1990US Classes:379/93.21, Having conferencing348/14.1, Motion image conferencing358/1.9, Attribute control379/93.08, Transmission scheme (e.g., compression/decompression, transmission rate)380/257Circuit switched network (e.g., wired telephone)ExaminersPrimary: Buczinski, Stephen C.Attorney, Agent or FirmInternational ClassesH04N 001/44H04N 007/14 H04N 007/12 AbstractA teleconferencing system includes desktop computers, external cameras and eripheral apparatus to allow interconnection of two or more terminals to engage in teleconferencing via digital data networks. A frame grabber interfaces each camera with its computer. Signals output from the computer are encoded and compressed before being input to a telephone line via a modulator/demodulator. A decoder is connected between the modulator/demodulator and the computer for decoding compressed video signals received by the modulator/demodulator means from the telephone line so that the signals may be displayed on a video display connected to the computer. | |
