EP0414222A2
Expired / Lapsed
EP
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Image superimposing apparatus
Assignee: Fujitsu Ltd
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Filing: 1990-08-22
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Granted: —
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Expires: 2010-08-22
Abstract
Abstract An image superimposing apparatus for superimposing a plurality of images into one image for display includes an operation circuit (31) for obtaining an image data rejated to a next frame based on an image data related to a present frame and a differential image data of a plurality of images, a memory (20) including first and second banks (21, 22) each having a memory capacity for storing at least one frame of image data, an address generator (25) for generating a display address which is used for making access to the first and second memory banks when reading image data for display, a display controller (23) for storing display image numbers which distinguish the plurality of images in correspondence with regions of each of the first and second banks, and a bank controller (26) for storing bank numbers of the first and second banks in correspondence with the display image numbers to indicate the bank from which the image data is presently being read out for display. The bank controller outputs a bank number in response to the display image number from the display controller, and the display address from the address generator and the bank number of the bank controller designate one of the first and second banks and its region from which the image data is to be read out for display.
Inventors
- 👤 Masakazu Yamaguchi
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-24 20:52
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/222; H04N5/262; H04N5/2624; H04N19/00; H04N19/50; H04N19/503; H04N7/00; H04N7/14; H04N7/15
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
279 words
An image superimposing apparatus for superimposing a plurality of images into one image for display, said image superimposing apparatus comprising operation means (31) for obtaining an image data related to a next frame based on an image data related to a present frame and a differential image data of a plurality of images, characterized in that there are provided: memory means (20) coupled to said operation means (31) including first and second banks (21, 22) each having a memory capacity for storing at least one frame of image data; address generating means (25) coupled to said memory means for generating a display address which is used for making access to said first and second memory banks when reading image data for display; display control means (23) coupled to said address generating means for storing display image numbers which distinguish the plurality of images in correspondence with regions of each of said first and second banks, said display control means outputting a display image number in response to the display address from said address generating means; and bank control means (26) coupled to said display control means for storing bank numbers of said first and second banks in correspondence with the display image numbers to indicate the bank from which the image data is presently being read out for display, said bank control means outputting a bank number in response to the display image number from said display control means, said display address from said address generating means and said bank number of said bank control means designating one of said first and second banks and its region from which the image data is to be read out for display.
Claim 2
Dependent Claim
279 words
An image superimposing apparatus for superimposing a plurality of images into one image for display, said image superimposing apparatus comprising operation means (31) for obtaining an image data related to a next frame based on an image data related to a present frame and a differential image data of a plurality of images, characterized in that there are provided: memory means (20) coupled to said operation means (31) including first and second banks (21, 22) each having a memory capacity for storing at least one frame of image data; address generating means (25) coupled to said memory means for generating a display address which is used for making access to said first and second memory banks when reading image data for display; display control means (23) coupled to said address generating means for storing display image numbers which distinguish the plurality of images in correspondence with regions of each of said first and second banks, said display control means outputting a display image number in response to the display address from said address generating means; and bank control means (26) coupled to said display control means for storing bank numbers of said first and second banks in correspondence with the display image numbers to indicate the bank from which the image data is presently being read out for display, said bank control means outputting a bank number in response to the display image number from said display control means, said display address from said address generating means and said bank number of said bank control means designating one of said first and second banks and its region from which the image data is to be read out for display.
Claim 3
Dependent Claim
50 words
The image superimposing apparatus as claimed in claim 1, characterized in that said operation means (31) receives the image data read out from said memory means (20) as the image data related to the present frame and supplies the image data related to the next frame to said memory means.
Claim 4
Dependent Claim
109 words
The image superimposing apparatus as claimed in claim 2, characterized in that there is further provided rewrite controller means (30) coupled to said operation means (31) for rewriting of the bank number in said bank control means (26) corresponding to the display image number from said display control means (23) when the differential image data of the image corresponding to the display image number is received by said operation means, said rewrite controller means being informed of the receipt of the differential image data of the image corresponding to the display image number from said display control means based on a signal which is received from the operation means.
Claim 5
Dependent Claim
155 words
The image superimposing apparatus as claimed in claim 3, characterized in that said rewrite controller means (30) supplies to said memory means (20) a rewriting address of the image data which is to be rewritten within said memory means when the differential image data is received by said operation means (31), so that the image data read out from the rewriting address of one of the first and second banks (21, 22) of said memory means (20) is supplied to said operation means where the image data is added with the differential image data to generate the image data related to the next frame, said image data related to the next frame being rewritten into the rewriting address of said one of the first and second banks of said memory means, said rewriting address designating a region of said memory means other than a region from which the image data is read out for display.
Claim 6
Dependent Claim
31 words
The image superimposing apparatus as claimed in claim 3 or 4, characterized in that said rewrite controller means (30) initially writes the display image numbers in said display control means (23).
Claim 7
Dependent Claim
32 words
The image superimposing apparatus as claimed in any of claims 3 to 5, characterized in that said rewrite controller means (30) initially writes the bank numbers in said bank control means (26).
Claim 8
Dependent Claim
44 words
The image superimposing apparatus as claimed in any of claims 1 to 6, characterized in that said display control means (23) includes a display region table (24) which stores the display image numbers in a form of a table accessible by the display address.
Claim 9
Dependent Claim
43 words
The image superimposing apparatus as claimed in any of claims 1 to 7, characterized in that said bank control means (26) includes a bank table (27) which stores the bank numbers in a form of a table accessible by the display image number.
Claim 10
Dependent Claim
52 words
The image superimposing apparatus as claimed in any of claims 1 to 8, characterized in that there is further provided display means (28) coupled to said memory means (20) for displaying the image data read out from said memory means, so that one image containing a plurality of superimposed images is displayed.
Claim 11
Dependent Claim
28 words
The image superimposing apparatus as claimed in any of claims 1 to 9, characterized in that said bank control means (26) stores the bank numbers as 1-bit data.
Claim 12
Dependent Claim
44 words
The image superimposing apparatus as claimed in any of claims 1 to 10, characterized in that said first and second banks (21, 22) of said memory means (20) each have a memory capacity amounting to at least one frame but less than two frames.
References Cited (Backward Citations)
No citation records indexed.
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