Video monitoring system including a memory for storing and transmitting a video signal immediately following the occurrence of an event
First Claim
1. A video monitoring system comprising:
- a sending station for outputting a video signal indicative of an image of an object;
a receiving station including monitor means for reproducing an image from the video signal; and
a communication path established between the sending station and the receiving station only when monitoring is required through the monitor means,wherein said sending station comprises;
pickup means for at all times picking up the image of the object and outputting the video signal indicative of the image;
memory means for storing a video signal on the object corresponding to a particular event to be monitored, said memory means including a frame memory having a capacity to store an image signal of at least one field;
sensor means for detecting the occurrence of the particular event to be monitored; and
control means for storing in said memory means the video signal outputted from the pickup means in accordance with the detection of the occurrence of the particular event by said sensor means and for reading the video signal stored in said memory means to transmit the video signal to said receiving station after a communication path is established between said sending station and said receiving station,wherein said control means puts said memory means in a write-enabled state in which the video signal outputted from said pickup means can be written at all times and, when said sensor means detects the occurrence of the particular event, said control means puts said memory means in a write-disabled state to maintain the video signal already stored in said memory means.
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Accused Products
Abstract
A communication path is established, only when monitoring a video signal on an object is required, between a sending station which acquires the video signal and a receiving station which monitors the acquired video signal through a display or the like. Usually, the video signal is monitored delayed by a time taken for establishment of the path. In the video monitoring system, a sensor senses the occurrence of a particular event to be monitored, the video of the object existing at the occurrence of the particular event is stored in an image memory on the basis of the output of the sensor indicative of such sensing. After the establishment of the communication path between the transmission and receiving stations, the stored video is transmitted to the receiving station to thereby ensure monitoring a truly required video.
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Citations
16 Claims
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1. A video monitoring system comprising:
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a sending station for outputting a video signal indicative of an image of an object; a receiving station including monitor means for reproducing an image from the video signal; and a communication path established between the sending station and the receiving station only when monitoring is required through the monitor means, wherein said sending station comprises; pickup means for at all times picking up the image of the object and outputting the video signal indicative of the image; memory means for storing a video signal on the object corresponding to a particular event to be monitored, said memory means including a frame memory having a capacity to store an image signal of at least one field; sensor means for detecting the occurrence of the particular event to be monitored; and control means for storing in said memory means the video signal outputted from the pickup means in accordance with the detection of the occurrence of the particular event by said sensor means and for reading the video signal stored in said memory means to transmit the video signal to said receiving station after a communication path is established between said sending station and said receiving station, wherein said control means puts said memory means in a write-enabled state in which the video signal outputted from said pickup means can be written at all times and, when said sensor means detects the occurrence of the particular event, said control means puts said memory means in a write-disabled state to maintain the video signal already stored in said memory means. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A video monitoring system comprising:
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a plurality of sending stations each for outputting a video signal indicative of an image of an object; a receiving station including monitor means for reproducing an image from the video signal; and a communication path selectively established between the plurality of sending stations and the receiving station to thereby monitor the video signal from a particular sending station through the monitor means when monitoring is required, wherein each of said sending stations comprises; pickup means for at all times picking up the image of the object and outputting the video signal indicative of the image; memory means for storing a video signal on the object corresponding to a particular event to be monitored, said memory means including a frame memory having a capacity to store an image signal of at least one field; sensor means for detecting the occurrence of the particular event to be monitored; first control means for storing in said memory means the video signal outputted from the pickup means in accordance with the detection of the occurrence of the particular event by said sensor means; and second control means for transmitting to the receiving station data on the identification of the sending stations selectively connected to the receiving station together with data on detection of the occurrence of the particular event by said sensor means, whereby after a communication path is established between a sending station and said receiving station, the stored video signal is read from said memory means and transmitted to said receiving station, and wherein said first control means puts said memory means in a write-enabled state in which the video signal outputted from said pickup means can be written at all times and, when said sensor means detects the occurrence of the particular event, said first control means puts said memory means in a write-disabled state to maintain the video signal already stored in said memory means. - View Dependent Claims (13, 14, 15, 16)
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Specification