Image signal processing apparatus

• US 20050117780A1
• Filed: 09/13/2004
• Published: 06/02/2005
• Est. Priority Date: 11/28/2003
• Status: Abandoned Application

• Current Assignee: Hitachi, Ltd.
• Original Assignee: Hitachi, Ltd.
• Inventors: Iguchi, Takuya, Horiuchi, Tadasu
• Application Number:
  US10/944,486
• Publication Number:
  US 20050117780A1
• Time in Patent Office: Days
• US Class Current: 382/103
• CPC Class Codes: H04N 21/426 Internal components of the client ; Characteristics thereof H04N5/44 takes precedence
• CPC Class Codes: H04N 21/4347 Demultiplexing of several video streams
• CPC Class Codes: H04N 21/44008 involving operations for analysing video streams, e.g. detecting features or characteristics in the video stream arrangements characterised by components specially adapted for monitoring, identification or recognition of video in broadcast systems H04H60/59
• CPC Class Codes: H04N 21/4882 for displaying messages, e.g. warnings, reminders arrangements for providing short real-time information to substation in data switching networks H04L12/1895
• CPC Class Codes: H04N 5/145 Movement estimation for video coding H04N19/51
• CPC Class Codes: H04N 5/268 Signal distribution or switching
• CPC Class Codes: H04N 5/445 for displaying additional information H04N5/50 takes precedence
• CPC Class Codes: H04N 5/76 Television signal recording
• CPC Class Codes: H04N 5/9261 involving data reduction
• CPC Class Codes: H04N 7/181 for receiving images from a plurality of remote sources
• CPC Class Codes: H04N 9/7921 for more than one processing mode

Abstract

To selectively display image signals of plural channels and detect motion of the channels for efficient display. The present invention is a video signal switching apparatus capable of detecting motion comprising: first video signal input modules 11-1, 12-1, and 13 which input video signals of plural channels in a time division manner; first video signal storage modules 15-1 and 16-1 which store the video signals in a storage module; a video signal output module 17 which outputs video signals of plural channels stored in the video signal storage module as consecutive video signals; second video signal input modules 11-1 and 12-1 which input video signals of plural channels in a time division manner; a video signal reduction module 14 which reduces the video signals; second video signal storage modules 15-2 and 16-2 which store reduced video signals in a storage module; and a motion detection module 18 which reads out reduced video signals of different times of two or more identical channels from the second video signal storage module to detect motion and produce motion information.

Claims

1. A video signal switching apparatus for detecting motion, comprising:

a first video signal input module which receives video signals from plural channels in a time division manner;

a first video signal storage module coupled to the first video signal input module for storing video signals from the first video signal input module;

a video signal output module which supplies video signals of the plural channels stored in the first video signal storage module as consecutive video signals;

a second video signal input module which receives video signals from the plural channels in a time division manner;

a video signal compression module coupled to the second video signal input module for compressing the video signals from the second video signal input module;

a second video signal storage module which stores compressed video signals from the video signal compression module; and

a motion detection module which reads out compressed video signals of different times of two or more identical channels from the second video signal storage module to thereby detect motion and produce motion information.

2. The video signal switching apparatus of claim 1 further, comprising:

a video signal display control module which converts video signals of the plural channels into video signals displayable on a monitor, and

displaying an alarm mark in a video signal of a channel in which motion has been detected by the motion detection module.

3. The video signal switching apparatus of claim 1 further comprising:

a video signal display control module which converts video signals of the plural channels into video signals displayable on a monitor, and

displaying a video signal of a channel in which motion has been detected by the motion detection module, in a magnified manner in comparison to the video signals of other channels.

4. The video signal switching apparatus of claim 1 further comprising:

a video signal display module which converts video signals of the plural channels into video signals displayable on a monitor, and

displaying a video signal of a channel in which motion has been detected by the motion detection module, with a greater display frequency in a comparison to the video signals of other channels.

5. The video signal switching apparatus of claim 1 further comprising:

a video signal recording module which compressively encodes video signals of the plural channels and records the compressed video signals on a recording medium, and

recording a video signal of a channel in which motion has been detected by the motion detection module, at a lower compression rate than video signals of other channels.

6. The video signal switching apparatus of claim 1 further comprising:

a video signal recording module which compressively encodes video signals of the plural channels and records the compressed video signals on a recording medium, and

recording information indicating that the motion detection module has detected motion in the video signal recording module.

7. The video signal switching apparatus of claim 1 further comprising:

a video signal transmission module which compressively encodes video signals of the plural channels and transmits the compressed video signals, and

transmitting a video signal of a channel in which motion has been detected by the motion detection module, at a lower compression rate than video signals of other channels.

8. The video signal switching apparatus of claim 1 further comprising:

a video signal transmission module which compressively encodes video signals of the plural channels and transmits the compressed video signals, and

transmitting information indicating that the motion detection module has detected motion.