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EP0466331A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Motion image difference detecting apparatus

Assignee: Sony Corp
•
Filing: 1991-06-10
•
Granted: —
•
Expires: 2011-06-10
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Abstract

Abstract In, for example, a teleconference system, a motion image difference detecting apparatus comprises a first memory (8) for storing first data of a motion image signal corresponding to a first area obtained by dividing the motion image signal, a second memory (12) for storing second data of the motion image signal corresponding to a second area obtained by so dividing the motion image signal, an overlap area of the motion image signal where the first and second areas meet being stored in each of the memories (8, 12), a memory controller (2) for controlling each of the memories (8, 12) so as to store thereinto the image signal of the overlap area, and a detector (6, 10) for detecting a difference between the present frame image and the preceding frame image in the form of block units. <IMAGE>

Inventors

  • 👤 Toshihiko c/o Patents Division Sony Corp. Kawai

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-10-30 15:41
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/76; H04N5/907; G; G06; G06T; G06T7/00; G06T7/20; G06T7/223; G06T7/231; H04N19/00; H04N19/42; H04N19/43; H04N19/433; H04N19/436; H04N19/50; H04N19/503; H04N19/51; H04N5/14; H04N5/144; H04N5/145; G06T2207/00; G06T2207/10; G06T2207/10016

Claims Analysis

Total Claims: 6
Claim 1
Independent Claim 185 words
A motion image difference detecting apparatus comprising: first memory means (8) for storing first data of a motion image signal corresponding to a first area obtained by dividing said motion image signal; second memory means (12) for storing second data of said motion image signal corresponding to a second area obtained by so dividing said motion image signal, an overlap area of said motion image signal where said first and second areas meet being stored in each of said memory means (8, 12), said two memory means (8, 12) being independent of each other; a memory controller (2) for controlling each of said memory means (8, 12) so as to store thereinto the image signal of said overlap area including the boundary line where said first and second areas meet; and detecting means (6, 10) connected to said memory means (8, 12) for detecting a difference between the present frame image and the preceding frame image based on each predetermined area of the image in the form of block units for processing said motion image signal stored in each of said memory means (8, 12).
Claim 2
Dependent Claim 38 words
Apparatus according to claim 1 wherein said detecting means (6, 10) detects a motion condition of said motion image signal based on a block matching method using a searching area in the image to derive a motion vector.
Claim 3
Dependent Claim 23 words
Apparatus according to claim 2 wherein said motion image signal is searched by said detecting means (6, 10) based on said block unit.
Claim 4
Dependent Claim 22 words
Apparatus according to claim 1, claim 3 or claim 3 wherein said overlap area has the width of a said block unit.
Claim 5
Dependent Claim 36 words
Apparatus according to any one of the preceding claims comprising further said memory means to enable said motion image signal to be divided into more than two said areas with respective overlap areas where they meet.
Claim 6
Dependent Claim 15 words
Apparatus according to any one of the preceding claims forming part of a teleconference system.

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