JPH06319142A - Portable supervisory camera - Google Patents

Abstract

PURPOSE:To provide the portable supervisory camera installed without limitation of the use of a connection cord. CONSTITUTION:A supervisory picture of the portable supervisory camera 10 is subjected to compression coding and a transmission section 15 of the portable supervisory camera 10 is connected to a monitor television receiver through a radio digital public line and an ISDN public line, the monitor television receiver 30 applies expansion decoding to the compressed picture signal and then the user supervises the picture. Thus, the portable supervisory camera 10 with excellent portability without limitation of the use of a connection cord is provided. Moreover, remote controlling operation from the monitor television receiver side is attained by allowing the monitor television receiver to send a command of supervision start/end.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a portable surveillance camera provided with a portable wireless communication section.

[0002]

2. Description of the Related Art In recent years, surveillance cameras have come to be used in various places. Hereinafter, a conventional surveillance camera will be described with reference to the drawings.

FIG. 4 is an explanatory diagram of a conventional method of connecting a surveillance camera and a monitor television. As shown in FIG. 4, the surveillance camera 1 aimed at the subject to be monitored was connected to the monitor television 3 for monitoring by the wire 2.

[0004]

However, since the above-mentioned conventional surveillance camera 1 is connected to the monitor TV 3 by the wire 2, once installed and connected by the connection cord, it is portable due to restrictions such as the length of the connection cord. It had a problem of poor sex.

It is therefore an object of the present invention to solve the above problems and provide a portable surveillance camera.

[0006]

In order to achieve the above object, the portable surveillance camera of the present invention compresses and encodes the surveillance video of the surveillance camera and transmits the image to the monitor television using a wireless digital public line. An image signal compressed by a monitor television is expanded and decoded.

[0007]

According to the present invention, with the above-described structure, it is possible to monitor at a place remote from the surveillance camera, and the surveillance camera can be freely installed without any restrictions such as connection cords.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing the structure of a portable surveillance camera according to an embodiment of the present invention.

In FIG. 1, 11 is an antenna for transmitting and receiving radio signals to and from a digital radio public line base station, 12 is a receiving unit for receiving radio signals from the master unit and demodulating the multiplexed digital signals, and 13 is A demultiplexing unit that extracts signals of respective slots from the multiplexed digital signal, 14 is a multiplexing unit that multiplexes the digital signals of the respective slots from the slot switching unit 16 into a digital signal to be multiplexed, 1
Reference numeral 5 is a transmitter for modulating the multiplexed digital signal into a radio signal to a digital radio public line base station, and 16 is for extracting the received data of the slot designated by the central controller 21 from the received multiplexed data. A slot switching unit for outputting to the central control unit 21, and transmitting the transmission data from the central control unit 21 and the image data of the image coding unit 19 to the slot designated by the central control unit 21 and outputting to the multiplexing unit 14, 17 Is an image electronic signal converter for converting an optical signal of an object to be monitored into an electric signal, 18 is an image memory for temporarily storing the image signal from the image electronic signal converter 17,
Reference numeral 19 is an image encoding unit for converting an image in the image memory into a communicable bit rate, 20 is a wireless control unit for determining a wireless frequency, transmission / reception timing, and transmission power, and 21 is an operation unit 2.
The radio control unit 20 and the slot switching unit 1 are operated by the operation from 2.
6, a central control unit for controlling the voice control unit, and 22 is an operation unit operated by the user.

FIG. 2 is a block diagram showing the configuration of a monitor television for monitoring the monitor image from the portable monitor camera in one embodiment of the present invention. In FIG. 2, 31 is IS
A line interface unit for interfacing with the DN public line 40, an image decoding unit 32 for decoding the compression-coded image signal from the line interface unit 31 into a normal image signal, and 33 for image decoding Conversion unit 32
An image memory for temporarily storing the image signal decoded by 1., 34 is an electronic signal image conversion unit for converting the image signal of the image memory 33 so that it can be seen by the user, and is, for example, a display unit using a cathode ray tube. . A central control unit 35 controls the line interface unit 31, the image decoding unit 32, the image memory 33, and the electronic signal image conversion unit 34. Three
An operation unit 6 is operated by the user and outputs the operation content to the central control unit 35.

FIG. 3 is an explanatory diagram of a method of connecting a portable surveillance camera and a monitor television in one embodiment of the present invention. Figure 3
In the mobile monitoring camera 10 is a wireless digital public line 4
1 and the monitor television 30 through the ISDN public line 40
Connected to.

The portable surveillance camera 1 constructed as described above
Regarding 0, the operation will be described below.

First, when a monitoring start operation is performed from the monitor television 30 using the operation unit 36 in FIG. 2, the central control unit 35 calls the portable monitoring camera 10 from the line interface unit 31 using the ISDN public line 40. .

In FIG. 1, in the portable monitoring camera 10, when the power is turned on by operating the operating unit 22, the central control unit 21 determines the frequency and slot to be used for communication by a predetermined means, and the wireless control unit 20 sets the frequency. To do. Further, the slot corresponding to the slot switching unit 16 is set. After the above settings are made, the unit enters the standby state. In the standby state, when there is an incoming call from the public on the wireless digital public line 41 including the "incoming request command", the receiving unit 12 receives the signal, and the demultiplexing unit 13 separates it as digital data of each slot.
It is taken out by the slot switching unit 16 and passed to the central control unit 21. The central control unit 21 determines the frequency and slot used for transmission in the wireless control unit 20 by a predetermined means, and sets the frequency and transmission power in the wireless control unit 20. Also,
The slot corresponding to the slot switching unit 16 is set.
Next, the "response command" corresponding to the "incoming request command" is output from the central control unit 21 to the slot switching unit 16, and the multiplexing unit 14 is applied to the corresponding slots of the plurality of slots.
To multiplex. Then, the transmitter 15 responds to the public line as a radio signal. Wireless digital public line 41 and I
When connected by the SDN public line 40, the image signal from the image electronic signal conversion unit 17 is temporarily stored in the image memory 18, and the image encoding unit 19 compresses and encodes into a signal of a bit rate communicable by digital communication, The encoded image signal is output to the slot switching unit 16. When the line interface unit 31 of the monitor television 30 receives the call start signal from the ISDN public line 40, the compressed image signal from the mobile monitoring camera 10 is output to the image decoding unit 32, and the image decoding unit 32 outputs the compressed image. The normal image is decoded and temporarily stored in the image memory 33. The electronic signal image conversion unit 34 converts the image signal so that it can be seen by the user, and the user can monitor the monitor image.

When monitoring is stopped from the monitor TV 30, the monitoring stop operation is performed using the operation unit 36, and the central control unit 35 causes the ISDN from the line interface unit 31.
End the public line 40.

In FIG. 1, when the mobile monitoring camera 10 receives a wireless signal including the "end command" from the wireless digital public line 41 in the monitoring state, the wireless signal is received by the receiving unit 12, and the demultiplexing unit 13 detects each slot. It is separated as digital data, taken out by the slot switching unit 16, and passed to the central control unit 21. The central control unit 21 puts the entire unit on standby and waits for another incoming call.

[0018]

As described above, since the portable surveillance camera of the present invention does not need to be connected to the monitor TV in a wired manner, it can be freely installed without restriction of installation conditions, and the restriction of starting and stopping monitoring from the monitor TV side. It is possible to obtain a portable surveillance camera which is easy to use and can be used.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a mobile surveillance camera according to an embodiment of the present invention.

FIG. 2 is a block diagram showing a configuration of a monitor television that monitors a monitor image from a portable monitor camera according to an embodiment of the present invention.

FIG. 3 is an explanatory diagram of a method of connecting a portable monitoring camera and a monitor TV in an embodiment of the present invention.

FIG. 4 is an explanatory diagram of a conventional method of connecting a surveillance camera and a monitor TV.

[Explanation of symbols]

 12 receiving section 13 demultiplexing section 14 multiplexing section 15 transmitting section 16 slot switching section 17 image electronic signal converting section 18 image memory 19 image encoding section 20 wireless control section 21 central control section 32 image decoding section 33 image memory

Claims (1)

[Claims] 1. A radio receiving section, a demultiplexing section for demultiplexing a multiplexed signal from this radio receiving section into a signal before multiplexing, a radio transmitting section, and a signal to be multiplexed to this radio transmitting section. A multiplexing unit for multiplexing, this wireless transmitting unit, this multiplexing unit, this receiving unit, a wireless control unit for controlling wireless multiplexing with respect to this demultiplexing unit, and data being multiplexed. A slot switching section for extracting data of a required slot from the image, an image electronic signal converting section for converting an optical image signal into an electronic image signal, an image memory for accumulating an electronic image signal from the image electronic signal converting section, and an image for this image. An image coding unit for compressing and coding the image data of the memory into a bit rate signal and outputting the compressed and coded image signal to the slot switching unit, the wireless control unit, the slot switching unit, and the image coding Parts and a portable surveillance camera and the image memory, characterized in that a central control unit that controls to integrate the image electronic signal conversion.