Television – Two-way video and voice communication – User positioning
Patent
1994-12-23
1997-06-17
Peng, John K.
Television
Two-way video and voice communication
User positioning
348 19, 348 15, 348441, H04N 724
Patent
active
056401981
ABSTRACT:
Communication between an image-information storage device and a terminal is made possible even in a case where they have images of different image formats. An image data delivery request, transmitted from any of a plurality of terminals and received by a receiving portion, includes information indicating that the terminal has a source format of CIF or QCIF. This information is transferred to a communication control portion which informs the source format control portion of the source format (CIF or QCIF of) the terminal. When the terminal has the CIF source format, the required data transmitted from an image-information storage device are transmitted through a transmitter portion to the terminal. When the terminal has the QCIF source format, a part of the image data transferred from the image-information storage device is extracted and converted into data of QCIF format by the source format control portion. The converted data of QCIF source format are then transmitted through a transmitting portion to the terminal.
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The International Conference on Signal Processing Applications & Technology; ICSPAT '93; Sep. 28, 1993 - Oct. 1, 1993; Santa Clara CA; "An H.261 Single-Chip low Bit Rate Video-Codec" by Y. Rasse, pp. 22-31.
Hibi Keiichi
Iwano Tsuneaki
Makiyama Takeshi
Nakagawa Yoshihiro
Nakamura Osamu
Flynn Nathan J.
Nippon Telegraph & Telephone Corp
Peng John K.
Sharp Kabushiki Kaisha
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