• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The present invention is provided between a video signal of an image switching device having a switch for switching between a video signal supplied by a camera and a video signal supplied by a recording device and having circuitry for processing the video signal from the recording device. To switch in the. According to the invention, the processing circuit compares the video signal coming from the recording apparatus with the video signal supplied by the camera and sets an operation mode based on the result of this comparison. The output signal from the recording apparatus is the signal coming from the tape in the replay mode. In record and stop modes, the signal entering the recorder loops through to the video recorder. The two signals are correlated with each other. As such, a conclusion can be drawn as to whether the image switching device should operate in the replay mode or the recording mode by a simple comparison.
    公开号:KR20020094013A
    申请号:KR1020027014866
    申请日:2002-02-27
    公开日:2002-12-16
    发明作者:프란시스쿠스 하. 엠. 베르헨；크리스티안 쎄. 엠. 비쓰세르스
    申请人:코닌클리케 필립스 일렉트로닉스 엔.브이.；
    IPC主号:
    专利说明:

    METHODS OF SWITCHING BETWEEN VIDEO SIGNALS IN AN IMAGE SWITCHING APPARATUS
    [2] Such a method for image switching devices used in surveillance or monitoring systems, for example in shops, hotels or underground parking lots, is known from US Pat. No. 5,150,212. The image switching device operates in two modes of operation. The first operation mode is a recording mode and the second operation mode is a replay mode. In the recording mode, the control unit controls the switch to which video signals of several cameras are connected. Individual images are filtered out of the video signal, addressed and recorded. The address identifies the camera. The signal reproduced by the video recorder in the second mode of operation is detected from the address and sent as an output to the corresponding monitor belonging to the camera. The circuit consists of a complex configuration.
    [3] Such a method for an image switching device is also known from WO 99/49 659. The video recorder has an activation unit, by which the image switching device can be controlled in the first recording mode or the second replay mode. The adjustment means in the image switching device sets the operation mode to the record mode when the camera switching signal is received from the recorder and to the replay mode when the address signal is detected within the video signal from the recorder. The circuit of the image switching device consists of a complicated configuration.
    [1] The present invention provides a video signal of an image switching device having a switch for switching between a video signal supplied by a camera and a video signal supplied by a recording device and having circuitry for processing the video signal from the recording device. To switch between.
    [11] 1 is a block circuit diagram of an image switch-over device having a monitor, a camera and a video recorder.
    [12] 2 is a block circuit diagram of an image switching device having a monitor, two cameras and two video recorders.
    [4] Therefore, it is an object of the present invention to provide a method for controlling an image switching device that can be easily implemented.
    [5] This object is achieved by the characteristic features of claim 1. According to the invention, the processing circuit compares the video signal from the recorder with the video signal supplied from the camera and then sets the operating mode based on the comparison result. The output signal of the recorder is the signal coming from the tape in the replay mode. In record and stop modes, the signal entering the recorder loops through to the video recorder. The two signals are correlated to each other. As such, conclusions can be drawn as to whether the image switching device should operate in replay mode or in record mode by simple comparison.
    [6] Advantageously, the time difference between the two video signals is determined in the comparison. If this difference falls below a predetermined value, the video signal can be considered to loop through and record mode set. The signal from the recorder to the image switching device only has a short time delay of less than 100 ns. When the recorder is in the replay mode, the two signals are not correlated with each other.
    [7] Sync pulses in the video signal can be considered in the comparison in a simple manner such that a distinction is made between the two modes of operation.
    [8] Advantageously, the image content is compared. If a sync pulse should be present within the time limit during switching of the recorder, a simple comparison of the image content will help to distinguish between the signals. It is expected that the image received by the camera will change over time. The comparison of the current video signal with the recorded signal will then show no correlation between the image content. As such, conclusions can be drawn regarding whether the signals are identical.
    [9] Advantageously, a simple comparison circuit, which compares the signal output from the camera with the signal supplied by the recorder, switches the switch of the image switching device to the replay mode in the replay mode in case of different signals; This is only in record mode that the switch can be used for switching between cameras. The recording device is also referred to as video recorder below. VCR stands for British term Video Cassette Recorder, VTR stands for American term Video Tape Recorder, and both are simply referred to as video recorders below.
    [10] In order to better understand the present invention, embodiments will be described below with reference to the drawings.
    [13] 1 shows an image switching device 1 having a processing circuit 2, a switch 3, an operation unit 4 and connection terminals 6 to 9. The camera 12 is connected to the camera connection terminal 6 by a connection cable 13. The monitor 14 is connected to the monitor connecting terminal 7 by a connecting cable 15. The image switching device 1 and the monitor 14 are assembled into one configuration unit. The video recorder 16 is connected to the connecting terminals 8 and 9 by two connecting cables 17 and 18. The connection terminals 8 and 9 can be combined into one connection terminal and the cables 17 and 18 can be combined into one cable. The camera 12 transmits the video signal through the connecting cables 13 and 18 and the connecting terminals 6 and 9 and through the internal connecting cable 19 to the switch 3 and the video recorder 16. The video signal from the camera 12 arrives through a switch 20 of the video recorder 16 to a junction point 21 which serves as a distributor. The video signal from the distributor 21 is transmitted to the switch 3 via the connecting cable 17, the connecting terminal 8 and the internal connecting cable 22 in the image switching device 1. The switch 3 can be controlled by the operator via the operating unit 4 so that the video signal from the camera 12 is picked up by the line 19 or 22. The video signal picked up by line 22 is time-delayed with respect to the video signal picked up by line 19, ie the video signal of camera 12 is directly to switch 3 or through switch 20. Given indirectly. From the switch 3, the video signal is transmitted to the monitor 14 via the connection terminal 7 and the connection cable 15. The video signal is passed from the divider 21 to the electronic part 23 of the video recorder 16. The electronic unit 23 stores the video signal on the tape 24. Video tape 24 serves as a storage medium.
    [14] The above description describes the first mode of operation, in which the video signal from the camera 12 is made available directly or indirectly at the switch 3, and the operator is immediately informed that the image received by the camera 12 is Or it is determined via the operating unit 4 whether it can be visually displayed on the monitor 14 with a time delay. At the same time video recorder 16 may be in record or stop mode. This means that the video signal from camera 12 may or may not be a recorded signal.
    [15] Then, the image switching device 1 is set to the second mode of operation when the switch 20 in the video recorder 16 switches, and the video signal is provided with the electronics 23 and the switch 20 from the storage medium 24. It will be output to the monitor 14 via an internal connection line 25, distributor 21 and connection line 17. Here it should be ensured that the switch 3 is switched to the internal line 22. When the switch 3 is switched to the camera 12 via the internal line 19 and the connecting terminal 6, a malfunction occurs. The processing unit 2 will fix this. The video signals transmitted over lines 19 and 22 are compared in processing circuit 2. If the video signal is looped through at switch 20, the same video signal will be present on lines 19 and 22 with a time difference of less than 100 ns. The processing circuit 2 compares the signals, sets a time offset between the two signals and checks whether the signals are identical. The processing circuit 2 acts as a comparison and detection circuit. If a time offset of 100 ns or more and other signals are detected, the processing circuit 2 causes the switch 3 to switch to a position that creates a connection between the storage medium 24 of the video recorder 16 and the monitor 14. This ensures that the image on monitor 14 comes from video recorder 16 in replay mode. Faults are excluded. The display symbol indicates the state of the image switching device 1, that is, whether the image switching device 1 is operating in the replay mode or the record mode. The item "VCR yes / no" is included in the menu of the image switching device 1 as a safety feature for when the non-standard video recorder 16 is used. The microprocessor acting as the control unit 26 between the comparing circuit 2 and the switch 3 controls the function of the image switching device 1.
    [16] FIG. 2 shows two cameras 12 and 30 connected to the image switching device 1 via connecting cables 13 and 31 and connecting terminals 6 and 32. For the second camera 30, the second video recorder 33 is connected to the image switching device 1 via two connection terminals 34 and 35 and two connection cables 36 and 37. The internal circuits of video recorders 16 and 33 are identical. The inner line 38 connects the connecting terminals 32 and 34 to the switch 3, and the further inner line 39 connects the connecting terminal 35 to the detection circuit 2 and the switch 3. Between camera 30, video recorder 33, switch 3 and detection circuit 2 in the same way as the line between camera 12, video recorder 16, switch 3 and detection circuit 2 The inner line of runs. The detection circuit 2 detects whether one of the two video recorders 16 and 33 is operating in the replay mode and causes the switch 3 to switch to this mode to output the corresponding signal on the monitor 14. In the recording mode, the switch 3 can take any position such that an image from either camera 12, 30 appears on the monitor 14 directly or indirectly, ie with a time delay. In the replay mode, the switch 3 must be positioned to switch to the video recorder 16 or 33 via the line 22 or 39. The recorded image is then replayed, which image is supplied from either the video recorder 16 or the video recorder 33. The reference on the monitor can then indicate whether several video recorders 16, 33 are in replay mode at the same time, and the video recorders 16, 33 are supplying the current picture to the monitor 14.
    [17] Reference
    [18] 1. Image Switching Device
    [19] 2. Processing Unit
    [20] 3. Switch
    [21] 4. Operation unit
    [22] 5 .---
    [23] 6. Camera connection terminal
    [24] 7. Monitor connection terminal
    [25] 8. Video Recorder Connection Terminal
    [26] 9. Video recorder connection terminal
    [27] 10 .---
    [28] 11 .---
    [29] 12. Camera
    [30] 13. Connecting cable
    [31] 14. Monitor
    [32] 15. Connecting cable
    [33] 16. Video Recorder
    [34] 17. Connecting cable
    [35] 18. Connecting cable
    [36] 19. Internal connection terminal
    [37] 20. Switch
    [38] 21. Splitter
    [39] 22. Inner Line
    [40] 23. Electronic part
    [41] 24. Tape
    [42] 25. Inner Line
    [43] 26. Control Unit
    [44] 27. Second Camera
    [45] 28. Connecting cable
    [46] 29. Connection terminal
    [47] 30. Second Video Recorder
    [48] 31. Connection terminal
    [49] 32. Connection terminal
    [50] 33. Connecting cable
    [51] 34. Connection cable
    [52] 35. Inner Line
    [53] 36. Inner Line
    [54] As mentioned above, the present invention comprises an image having a switch for switching between a video signal supplied by a camera and a video signal supplied by a recording apparatus and having circuitry for processing a video signal from the recording apparatus. It is available for a method of switching between video signals in a switching device.
    权利要求:
    Claims (5)
    [1" claim-type="Currently amended] A switch 3 for switching between the video signal supplied by the cameras 12 and 30 and the video signal supplied by the recording devices 16 and 33 and the video signal from the recording devices 16 and 33 A method of switching between video signals of an image switching device (1), comprising a circuit (2) for processing,
    The processing circuit 2 compares the video signal from the recording devices 16 and 33 with the video signal supplied by the cameras 12 and 30 and sets an operation mode based on the comparison result. And switching between video signals of the image switching device.
    [2" claim-type="Currently amended] 2. A method according to claim 1, wherein the time difference between the two video signals is determined from the comparison.
    [3" claim-type="Currently amended] 3. The method of claim 2, wherein the sync pulses in the two video signals are compared.
    [4" claim-type="Currently amended] Method according to one of the preceding claims, characterized in that the image content is compared.
    [5" claim-type="Currently amended] A switch 3 for switching between the video signal supplied by the cameras 12 and 30 and the video signal supplied by the recording devices 16 and 33, and the video signal from the recording devices 16 and 33. An image switching device (1) having a circuit (2) for processing
    The processing circuit 2 compares the signal output from the cameras 12 and 30 with the video signal supplied by the recording devices 16 and 33, and if the signals are different from each other, the image switching device 1 Switch the switch (3) to the replay mode.
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    同族专利:
    公开号 | 公开日
    EP1386484A2|2004-02-04|
    JP2004521546A|2004-07-15|
    US7053963B2|2006-05-30|
    WO2002073958A2|2002-09-19|
    WO2002073958A3|2003-02-13|
    CN1459193A|2003-11-26|
    US20020135684A1|2002-09-26|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    法律状态:
    2001-03-09|Priority to EP01200890.0
    2001-03-09|Priority to EP01200890
    2002-02-27|Application filed by 코닌클리케 필립스 일렉트로닉스 엔.브이.
    2002-02-27|Priority to PCT/IB2002/000624
    2002-12-16|Publication of KR20020094013A
    优先权:
    申请号 | 申请日 | 专利标题
    EP01200890.0|2001-03-09|
    EP01200890|2001-03-09|
    PCT/IB2002/000624|WO2002073958A2|2001-03-09|2002-02-27|Method of switching between video signals in an image switching apparatus|
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