Patent EP0320828A2 successfully refreshed from Google Patents.
EP0320828A2
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EP
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Methods for transmitting and displaying a still picture image in a still picture video telephone apparatus
Assignee: Mitsubishi Electric Corp
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Filing: 1988-12-10
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Granted: —
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Expires: 2008-12-10
Abstract
Abstract A still picture video telephone apparatus adapted to transmit and receive, through a telephone line, still picture information put in from a television camera (14) or the like, during a telephone call, comprising a picture memory (20) 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, an input means of memory region 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 (21) 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-provided picture memory portion and the incoming picture memory portion in various ways. Further, the present invention is a method for transmitting still picture image capable of extracting, according to the need, only a desired portion of the picture data stored in the picture memory thereby achieving highly efficient time-saving transmission. Furthermore, the present invention is a method for transmitting still picture image whereby clear picture image is displayed even when picture data of a different resolution is received and an accurate display is achieved even when picture data of a different aspect ratio is received at the signal receiver side.
Inventors
- 👤 Fumiaki Mitsubishi Denki Kabushiki K. Komatsu
- 👤 Kenichi Mitsubishi Denki Kabushiki K. Kashiwagi
- 👤 Kazuyuki Mitsubishi Denki Kabushiki K. Saigusa
- 👤 Akifumi Mitsubishi Denki Kabushiki K. Kabasawa
- 👤 Hiroshi Mitsubishi Denki Kabushiki K. Ohtsuka
- 👤 Shinya Mitsubishi Denki Kabushiki Kaisha Yokodate
- 👤 Hitoshi Mitsubishi Denki Kabushiki K. Fujimoto
- 👤 Junichi Mitsubishi Denki Kabushiki K. Sakamoto
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-25 06:25
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/76; H04N5/78; H04N5/782; H04N5/783; H04N7/00; H04N7/14; H04N7/141; H04N7/12
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
207 words
In a still picture video telephone apparatus adapted to transmit and receive, through a telephone line, still picture information delivered from a television camera or the like during a telephone call, said still picture video telephone apparatus comprising: 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 said 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; input means of memory region information for setting up regions for said self-prepared picture memory portion and said incoming picture memory portion within said picture memory; and picture memory control circuit for controlling still picture information input to and output from said picture memory based on said memory region information; wherein said picture memory is capable of storing a plurality of pages of still picture information, and allocation of memory regions within the picture memory to said self-provided picture memory portion and said incoming picture memory portion is variable.
Claim 2
Dependent Claim
207 words
In a still picture video telephone apparatus adapted to transmit and receive, through a telephone line, still picture information delivered from a television camera or the like during a telephone call, said still picture video telephone apparatus comprising: 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 said 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; input means of memory region information for setting up regions for said self-prepared picture memory portion and said incoming picture memory portion within said picture memory; and picture memory control circuit for controlling still picture information input to and output from said picture memory based on said memory region information; wherein said picture memory is capable of storing a plurality of pages of still picture information, and allocation of memory regions within the picture memory to said self-provided picture memory portion and said incoming picture memory portion is variable.
Claim 3
Dependent Claim
45 words
The still picture video telephone apparatus according to claim 1, wherein said self-provided picture memory portion is a memory for receiving desired still picture information transferred from said camera-taken picture memory portion and storing said still picture information as a picture image to be transmitted.
Claim 4
Dependent Claim
36 words
The still picture video telephone apparatus according to claim 1, wherein said self-provided picture memory portion and incoming picture memory portion are each a memory capable of storing a plurality of pages of still picture information.
Claim 5
Dependent Claim
53 words
The still picture video telephone apparatus according to claim 1, further comprising a detector circuit for detecting a loop-off which indicates the end of a call, wherein said picture memory control circuit erases the picture information in said incoming picture memory portion in response to a loop-off detected signal from said detector circuit.
Claim 6
Dependent Claim
42 words
The still picture video telephone apparatus according to claim 4, wherein said detector circuit detects on/off of a power supply and said picture memory control circuit erases picture information in said incoming picture memory portion in response to a detected signal therefrom.
Claim 7
Dependent Claim
140 words
In a method for transmitting still picture image for use in a still picture video telephone apparatus whereby still picture information taken in by a television camera or the like is once written into a picture memory and thereafter read out to be displayed on a display and also to be transmitted through a telephone line as a transmission signal to the system on the other end of the line, said method for transmitting still picture image for use in a still picture video telephone apparatus comprising the steps of: transferring only a desired portion of the still picture information stored in said picture memory to another specific region within said picture memory and storing the information therein; and reading out said transferred and stored still picture information sequentially, converting the information into a transmission signal, and transmitting the signal.
Claim 8
Dependent Claim
140 words
In a method for transmitting still picture image for use in a still picture video telephone apparatus whereby still picture information taken in by a television camera or the like is once written into a picture memory and thereafter read out to be displayed on a display and also to be transmitted through a telephone line as a transmission signal to the system on the other end of the line, said method for transmitting still picture image for use in a still picture video telephone apparatus comprising the steps of: transferring only a desired portion of the still picture information stored in said picture memory to another specific region within said picture memory and storing the information therein; and reading out said transferred and stored still picture information sequentially, converting the information into a transmission signal, and transmitting the signal.
Claim 9
Dependent Claim
49 words
The method for transmitting still picture image for use in a still picture video telephone apparatus according to claim 6, wherein said desired portion of the still picture information is preset to follow structure of the display picture plane of the system on the other end of the line.
Claim 10
Dependent Claim
233 words
In a method for displaying still picture image for use in a still picture video telephone apparatus whereby incoming still picture information through a communication line is stored in a picture memory and a received picture image is displayed based on the stored still picture information, said method for displaying still picture information for use in a still picture video telephone apparatus comprising: the step of recognizing resolution of incoming still picture information based on data received prior to arrival of the still picture information; the step of storage upon signal reception, storing the received still picture information into a special signal reception region sequentially; the step of picture image display during signal reception, displaying on a display the still picture information stored in said special signal reception region in accordance with the recognized resolution of the still picture information during reception of still picture information; the step of transfer, transferring the still picture information stored in said special signal reception region to said picture memory used for displaying a still picture image on a display at the time of the normal operation; and the step of erase, erasing the information stored in said special reception region after the end of signal reception; wherein even when still picture information of a different resolution is received, a still picture image is displayed on a display in accordance with a predetermined resolution during signal reception.
Claim 11
Dependent Claim
233 words
In a method for displaying still picture image for use in a still picture video telephone apparatus whereby incoming still picture information through a communication line is stored in a picture memory and a received picture image is displayed based on the stored still picture information, said method for displaying still picture information for use in a still picture video telephone apparatus comprising: the step of recognizing resolution of incoming still picture information based on data received prior to arrival of the still picture information; the step of storage upon signal reception, storing the received still picture information into a special signal reception region sequentially; the step of picture image display during signal reception, displaying on a display the still picture information stored in said special signal reception region in accordance with the recognized resolution of the still picture information during reception of still picture information; the step of transfer, transferring the still picture information stored in said special signal reception region to said picture memory used for displaying a still picture image on a display at the time of the normal operation; and the step of erase, erasing the information stored in said special reception region after the end of signal reception; wherein even when still picture information of a different resolution is received, a still picture image is displayed on a display in accordance with a predetermined resolution during signal reception.
Claim 12
Dependent Claim
118 words
In a method for displaying still picture for use in a still picture video telephone apparatus whereby desired still picture is transmitted and received using a communication line and displayed during a telephone call, said method for displaying still picture for use in a still picture video telephone apparatus comprising the steps of: putting data on the aspect ratio of the picture plane into a header of the still picture information transmitted and received; and erasing, upon receipt of still picture information with a smaller aspect ratio than that of its own picture plane, the picture image data thereof corresponding to at least a portion of the peripheral region in the horizontal direction of its own picture plane.
Claim 13
Dependent Claim
118 words
In a method for displaying still picture for use in a still picture video telephone apparatus whereby desired still picture is transmitted and received using a communication line and displayed during a telephone call, said method for displaying still picture for use in a still picture video telephone apparatus comprising the steps of: putting data on the aspect ratio of the picture plane into a header of the still picture information transmitted and received; and erasing, upon receipt of still picture information with a smaller aspect ratio than that of its own picture plane, the picture image data thereof corresponding to at least a portion of the peripheral region in the horizontal direction of its own picture plane.
Claim 14
Dependent Claim
110 words
In a method for displaying still picture for use in a still picture video telephone apparatus whereby desired still picture is transmitted and received using a communication line and displayed during a telephone call, said method for displaying still picture for use in a still picture video telephone apparatus comprising the steps of: putting data on the aspect ratio of the picture plane in a header of the still picture information transmitted and received; and adding, upon receipt of still picture information with a different aspect ratio, picture data of a specific pattern stored in advance to at least a portion of the peripheral region of its own picture plane.
Claim 15
Dependent Claim
110 words
In a method for displaying still picture for use in a still picture video telephone apparatus whereby desired still picture is transmitted and received using a communication line and displayed during a telephone call, said method for displaying still picture for use in a still picture video telephone apparatus comprising the steps of: putting data on the aspect ratio of the picture plane in a header of the still picture information transmitted and received; and adding, upon receipt of still picture information with a different aspect ratio, picture data of a specific pattern stored in advance to at least a portion of the peripheral region of its own picture plane.
References Cited (Backward Citations)
No citation records indexed.
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