US Patent No: 4,962,521

Number of patents in Portfolio can not be more than 2000

Apparatus for still picture video telephone apparatus and methods for transmitting and displaying still picture image for use therein

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ATTORNEY / AGENT: (SPONSORED)
 

Importance

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Abstract

A still picture video telephone apparatus adapted to transmit and receive, through a telephone line, still picture information from a television camera or the like, during a telephone call, includes a picture memory for storing a plurality of pages of picture information consisting of a camera-taken picture memory portion which rewrites still picture information input therein delivered from the television camera at intervals of a predetermined period, a self-prepared picture memory portion which stores desired still picture information until arrival of a rewrite instruction, and an incoming picture memory portion which sequentially rewrites still picture information therein upon receipt of still picture information when its storage regions are filled up, memory region input information for setting up regions for the self-prepared picture memory portion and the incoming picture memory portion within the picture memory, and picture memory control circuit for controlling still picture information input to and output from the picture memory based on the memory region information, wherein the picture memory is capable of storing a plurality pages of still picture information and allocating memory regions to the self-prepared picture memory portion and the incoming picture memory portion in various ways.

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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
MITSUBISHI DENKI KABUSHIKI KAISHATOKYO19938

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Fujimoto, Hitoshi Abiko, JP 63 532
Kabasawa, Akifumi Kanagawa, JP 1 56
Kashiwagi, Kenichi Kawasaki, JP 6 101
Komatsu, Fumiaki Kobe, JP 13 146
Ohtsuka, Hiroshi Wako, JP 18 267
Saigusa, Kazuyuki Kamakura, JP 3 74
Sakamoto, Junichi Kanagawa, JP 90 754
Yokodate, Shinya Kanagawa, JP 7 75

Cited Art

Patent Info (Count) # Cites Year
 
LEMELSON, JEROME H. (2)
4,258,387 Video telephone 98 1979
4,485,400 Video telephone 134 1982
 
MITSUBISHI ELECTRONICS AMERICA, INC. (2)
4,715,059 Conversational video phone 87 1985
4,739,413 Video-optimized modulator-demodulator with adjacent modulating amplitudes matched to adjacent pixel gray values 14 1987
 
Bell Telephone Laboratories, Incorporated (1)
4,291,198 General-purpose electronic telephone station set 105 1979

Patent Citation Ranking

Forward Cites

Patent Info (Count) # Cites Year
 
HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P. (11)
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5,475,421 Video data scaling for video teleconferencing workstations communicating by digital data network 57 1992
5,546,324 Video teleconferencing for networked workstations 67 1994
5,594,859 Graphical user interface for video teleconferencing 155 1995
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CANON KABUSHIKI KAISHA (9)
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5,850,251 Visual telephone apparatus 1 1996
5,886,997 Mobile apparatus for performing data communication and presenting a display in accordance with the status of the data communication 1 1996
6,580,458 Television conference system wherein a plurality of image pickup means are displayed in a corresponding plurality of windows 4 1998
 
LG ELECTRONICS INC. (4)
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COLTERA, LLC (1)
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FUJITSU LIMITED (1)
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GATEWAY, INC. (1)
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INTELLECTUAL VENTURES FUND 83 LLC (1)
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INTELLECTUAL VENTURES HOLDING 56 LLC (1)
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LUCENT TECHNOLOGIES INC. (1)
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ShareVision Technology, Inc. (San Jose, CA) (1)
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Other [Check patent profile for assignment information] (3)
H1714 Automatic still image transmission upon call connection 46 1995
7,254,416 Mobile entertainment and communication device 0 2003
RE44306 System for terminating multicast channel and data broadcast when at least two second endpoints do not transmit positive acknowledgement message to first endpoint 0 2008