JPH07284087A - Television camera monitoring device - Google Patents

Abstract

PURPOSE:To obtain a device capable of transmitting the video signal of plural television cameras by one radio wave equipment. CONSTITUTION:The number of the camera required to be projected in a monitor 13 is inputted from an input part 1 and a first packet generating part 3 generates the packet of required data for camera control and transmits it from a first transmitting part 5 with a first modulating part 4. A second receiving part receives the radio wave and stores it in a first memory part. A second code reading part identifies the data and a changing-over part changes-over a second memory part in order to take out video data of the applying camera. Then, the second packet generating part generates the packet for transmitting video data, modulates it in the second modulating part and transmit it from the second transmitting part. A first receiving part 6 receives a transmission signal, a second storage part 9 stores it, a first code reading part 10 reads storea data and transmitted video data is extended, converted by a D/A converting part 12 and projected in the monitor.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a television camera monitoring apparatus, and more particularly to transmitting and receiving signals of a plurality of television cameras by a set of wireless apparatuses.

[0002]

2. Description of the Related Art Conventionally, a camera has been used for monitoring factories, stores, etc., and when viewing images taken by the camera on a monitor installed at a remote place, a camera signal is transmitted by a wireless device and the remote place is used. It was received and displayed on the monitor. In this case, one camera needs one wireless device, and when it is desired to see a plurality of different scenes, the same number of wireless devices as the number of cameras corresponding to the different scenes are required. Installing multiple radios is expensive, requires multiple frequencies to be used for radios, and there are restrictions on use due to the limited frequency band, so it is easy to install the number of cameras and radios you want to install. Could not be introduced.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems of the prior art, and provides an apparatus capable of transmitting video signals of a plurality of television cameras by one radio. With the goal.

[0004]

In order to solve the above problems, according to the present invention, an input section for selecting a television camera, a first storage section for storing input data, and a packet for a data communication procedure are generated. A first packet generator, a first modulator that modulates a transmission signal, a first transmitter that transmits a modulated signal, a first receiver that receives radio waves, and a first receiver and a first transmitter. A first antenna connected and transmitting and receiving radio waves, a first demodulation unit that demodulates a signal received by a first reception unit, a second storage unit that stores a demodulated signal, and a first code that reads packet data of the stored signal A reading unit, a decompression unit that decompresses the read data, a D / A conversion unit that converts the decompressed digital data into analog data, a monitor that displays the converted data, and a first unit that controls each unit.
A base station including a control unit, a second receiving unit that receives the radio waves of the first transmitting unit, a demodulating unit that demodulates the received signal, and a first memory unit that stores the demodulated signal are stored. A second code reading unit that reads packet data of a signal, a television camera that captures a scene, an A / D conversion unit that converts a video signal of the television camera into a digital signal, and a compression unit that compresses the converted data. And a second memory unit for storing compressed data, the television camera, the A / D conversion unit, the compression unit and the second memory unit are combined, and a plurality of these units are installed and read by the second reading unit. A switching unit for switching the corresponding second memory unit in response to a camera selection signal of data, a second packet generating unit for generating a packet of a data communication procedure, and a second modulating unit for modulating a transmission signal. A terminal station including a second transmitting unit that transmits a modulated signal, a second antenna that is connected to the second receiving unit and the second transmitting unit and that transmits and receives radio waves, and a second control unit that controls each unit. The present invention provides a television camera monitoring device, characterized in that

[0005]

According to the above configuration, the camera number and the lens condition (brightness,
(Zooming, etc.) is input and stored in the first storage unit. First
The packet generator generates a packet based on the input data in order to transmit the data necessary for camera control in the terminal device, modulates the packet by the first modulator, and transmits the packet by the first transmitter. The second receiver receives this radio wave, demodulates it in the second demodulator, and stores it in the first memory. Then, the second code reading unit identifies this stored data, the lens driving unit adjusts the lens condition of the corresponding camera, and the switching unit switches the second memory unit to retrieve the image data of the corresponding camera. . Next, the second packet generator generates a packet for transmitting the video data, modulates the packet by the second modulator, and transmits the packet by the second transmitter. The first receiving unit receives the transmission signal, stores it in the second storage unit, the first code reading unit reads the stored data, decompresses the transmitted video data, and converts it in the D / A conversion unit. , Project it on the monitor.

[0006]

Embodiments of the present invention will be described in detail with reference to the accompanying drawings. As shown in FIG. 1, reference numeral 1 denotes an input unit for designating the brightness, zoom value, etc. of the television camera, and for designating a camera to be projected from a plurality of television cameras. A first storage unit 2 stores the data input by the input unit 1. A first packet generator 3 generates a data communication procedure. Reference numeral 4 is a first modulator that modulates a transmission signal. Reference numeral 5 denotes a first transmission unit that transmits a modulated signal. 6 is the first
The reception section receives the radio wave. 7 is the first antenna, the first
It is connected to the receiving unit 6 and the first transmitting unit 5, and transmits and receives radio waves. A first demodulation unit 8 demodulates the signal received by the first reception unit 6. A second storage unit 9 stores the demodulated signal.
A first code reading unit 10 identifies the packet stored in the second storage unit 9. A decompression unit 11 decompresses the video data. A D / A conversion unit 12 converts the expanded digital data into analog data. 13 is a monitor, D / A
The data (video signal) converted by the converter 12 is displayed. 1
A first control unit 4 controls each of the above units. Reference numeral 15 is a base station.

As shown in FIG. 2, 17 is a second receiving section,
The electric wave of the first transmitter 6 is received. A demodulator 18 demodulates the received signal. A first memory unit 19 stores the demodulated signal. A second code reading unit 20 identifies the packet of the received signal stored in the first memory unit 19. A lens driving unit 21 controls the brightness, zoom value, etc. of the lenses of the plurality of television cameras 22 for photographing the scene. Two
An A / D conversion unit 3 converts the video signal of the television camera 22 into a digital signal. A compression unit 24 compresses the converted data. A second memory unit 25 stores the compressed data. Since a plurality of television cameras 22 are installed, each of the cameras 22 is provided with the lens driving unit 21, the A / D conversion unit 23, the compression unit 24, and the second memory unit 25. A switching unit 26 selects a second memory unit from the plurality of second memory units 25 in order to select a video signal of the camera 22 corresponding to the camera selection data in the packet identified by the second reading unit 20. Switch to section 25. A second packet generator 27 generates a data communication procedure. A second modulator 28 modulates the transmission signal. 29 is a 2nd transmission part and transmits a modulated signal. Reference numeral 30 denotes a second antenna, which is the second receiving unit 17
Also, it is connected to the second transmitter 29 and transmits and receives radio waves.
Reference numeral 31 denotes a second control unit, which controls each of the above units. 32 is a terminal station.

As shown in FIG. 3, 50 is a packet transmitted from the base station 15, and 60 is a packet transmitted from the terminal station 15. Reference numeral 51 is bit synchronization data, and data transmitted below is synchronized with this synchronization signal. Reference numeral 52 is frame synchronization data, and the video signal transmitted below is synchronized with this synchronization signal. 53 is a transmission ID, which is a code for identifying the base station 15. Reference numeral 54 is a reception ID, which is a code for designating the terminal station 32 of the communication partner. 55 is a header,
It consists of camera selection and other control codes. A camera selection code 56 determines which of a plurality of cameras installed in the terminal station 32 is designated. Reference numeral 57 is another control code for designating control items such as the brightness and zoom value of the lens. Reference numeral 58a denotes data, which is control data for the designated camera and the lens of the camera. 58b is data, which is one frame of the video signal of the selected camera.
Reference numeral 59 is an EOP (End Off Packet), which indicates the end of the packet.

The packet communication method is used for transmission / reception. The base station 15 transmits control items such as camera selection and lens brightness / zoom value to the terminal station 32, and the terminal station 32 transmits video data based on the control items. This is because, when the base station 15 receives the video data, it transmits the next control data to the terminal station 32 after the end of the video data, so that the quasi-bidirectional communication is effectively performed.

In the above configuration, for example, in the "A" base station 15 of the plurality of base stations, the three cameras 2 installed in the "C" terminal station 32 of the plurality of terminal stations.
When it is desired to continuously transmit the images captured by 2 (a, b, c) in the order of a, b, c, the procedure is as follows. First, input A indicating the base station 15 from the input unit 1 and input the numbers a, b, and c of the camera 22 desired to be viewed in the order desired, and the camera 2
When it is desired to control the 2nd lens, the item, for example, a of the camera 22 specifies a zoom value of 3, b specifies a zoom value of 2, and c specifies a zoom value of 1. The input data is stored in the first storage unit 2. Next, the first packet generator 3 sends the packet 5
Data corresponding to 0 is read from the first storage unit 2 and written. That is, “A” is written in the transmission ID 53, “C” is written in the reception ID 54, and “a” is written in the camera selection 56.

The other control code 57 includes the camera 22.
In a, the zoom value 3 is written. When the writing to the packet is completed, the first controller 14 transmits the packet data via the first modulator 4 and the first transmitter 5. Then, the second receiving unit 17 receives this data, demodulates it in the second demodulating unit 18, and stores it in the first memory unit 19. The second control unit 31 reads out the data stored in the first memory unit 19, the second code reading unit 20 identifies the content of this data, and the lens driving unit 21 of the camera a of the camera 22 according to the identified content. Set the lens to a zoom value of 3. Then, the second control unit 3
1 is in accordance with the following contents identified by the second code reading unit 20,
The switching unit 26 is switched to the corresponding second memory unit 25, and the video signal of the camera a is taken out. Therefore, the second packet generator 27 writes the corresponding data in the packet 60. That is, “C” is written in the transmission ID 53, “A” is written in the reception ID 54, and “a” is written in the camera selection 56. Then, the second memory unit 2 selected by the switching unit 26 is added to the data 58b.
The video signal of one frame of camera a of No. 5 is written. When the writing to the packet is completed, the second control unit 31 transmits the packet data via the second modulation unit 28 and the second transmission unit 29.

The transmission signal is received by the first receiving section 6, demodulated by the first demodulating section 8 and stored in the second storage section 9. The first control unit 14 reads the data stored in the second storage unit 9, the first code reading unit 10 identifies the content of this data, and knows that the video signal of the camera a has been transmitted. Therefore, the first control unit 14 expands this data by the expansion unit 11, converts it into an analog signal by the D / A conversion unit 11, and displays it on the monitor 13.
Here, one operation ends. Next, the first control unit 14
In order to perform the following transmission procedure in the packet generator 3, the data corresponding to the packet 50 is read from the first storage unit 2 and written. That is, “A” is written in the transmission ID 53, “C” is written in the reception ID 54, and the camera selection 5
In “6”, “b” is written. The zoom value 2 of b of the camera 22 is written in the other control code 57. When the writing to the packet is completed, the first controller 14 transmits the packet data via the first modulator 4 and the first transmitter 5.
The subsequent operations are performed in the same manner as above, and the monitor 13
The image signal of the camera b is projected on. In this way, the video signals of the cameras c → a → b are sequentially displayed on the monitor 13.

In another embodiment, for example, base station 15 of A
Is the three cameras 22 installed in the terminal station 32 of C
When it is desired to transmit the images captured by (A, B, C) in the order of A, B, C, the procedure is as follows. From the input unit 1, A indicating the base station 15 is input, and the numbers a, b and c of the camera 22 to be viewed are input. The input data is stored in the first storage unit 2. Next, the first packet generation unit 3 reads out and writes the data corresponding to the packet 50 from the first storage unit 2. That is, “A” is written in the transmission ID 53, “C” is written in the reception ID 54, and the camera selection 5
In “6”, “a, b, c” is written. When the writing to the packet is completed, the first controller 14 transmits the packet data via the first modulator 4 and the first transmitter 5. So the second
The receiving unit 17 receives this data, demodulates it in the second demodulating unit 18, and stores it in the first memory unit 19. The second control unit 31 reads the data stored in the first memory unit 19,
The code reading unit 20 identifies the contents of this data, and the switching unit 26 selects a plurality of second memory units 25 according to the identified contents.
Are switched in the designated order (the order of the cameras a, b, and c) to extract the video signal. The second packet generator 27 writes the corresponding data in the packet 60. That is, the transmission ID 52 is "C" and the reception ID 54 is "A".
“A, b, c” is written in the camera selection 56.

Then, the video signal of one frame of the camera a of the second memory unit 25 selected first by the switching unit 26 is written in the data 58b, and then the second memory unit 25 selected second by the switching unit 26. The video signal of one frame of the camera b is written, and the second selected by the switching unit 26 is the third.
The video signal of one frame of the camera c in the memory unit 25 is written. When the writing to the packet is completed, the second controller 31 transfers the packet data to the second modulator 28 and the second transmitter 2.
Sent via 9. The transmission signal is received by the first receiving unit 6,
It is demodulated by the first demodulation unit 8 and stored in the second storage unit 9. First
The control unit 14 reads out the data stored in the second storage unit 9, and the first code reading unit 10 identifies the content of this data. First, the video signal of the camera a, and then the cameras b and c.
Know that the video signal of has been transmitted. Therefore, the first control unit 14 expands this data by the expansion unit 11, converts it into an analog signal by the D / A conversion unit 11, and displays it on the monitor 13.

[0015]

As described above, according to the present invention, the video signals captured by a plurality of cameras can be sequentially switched and continuously transmitted by one wireless device.
Since there is no need for one wireless device for each camera, there is an effect that the facility cost can be reduced.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of a television camera monitoring device of the present invention.

FIG. 2 is a block diagram showing an embodiment of a television camera monitoring device of the present invention.

FIG. 3 is a packet diagram of the television camera monitoring apparatus of the present invention, where A is a base station packet and B is a terminal packet.

[Explanation of symbols]

 1 Input Section 2 First Storage Section 3 First Packet Generation Section 4 First Modulation Section 5 First Transmission Section 6 First Reception Section 7 First Antenna 8 First Demodulation Section 9 Second Storage Section 10 First Code Reading Section 11 Decompression unit 12 D / A conversion unit 13 Monitor 14 First control unit 15 Base station 17 Second reception unit 18 Second demodulation unit 19 First memory unit 20 Second code reading unit 21 Lens drive unit 22 Television camera 23 A / D converter 24 Compressor 25 Second memory 26 Switcher 27 Second packet generator 28 Second modulator 29 Second transmitter 30 First antenna 31 First controller

Claims (3)

[Claims] 1. An input unit for selecting a television camera, a first storage unit for storing input data, a first packet generation unit for generating a packet of a data communication procedure, and a first modulation for modulating a transmission signal. Section, a first transmitting section for transmitting a modulated signal, a first receiving section for receiving an electric wave, a first antenna connected to the first receiving section and the first transmitting section for transmitting and receiving an electric wave, and a first receiving section A first demodulation unit that demodulates the signal received in step 1, a second storage unit that stores the demodulated signal, a first code reading unit that reads packet data of the stored signal, an expansion unit that expands the read data, and an expansion A D / A conversion unit for converting the converted digital data into analog data, a monitor for displaying the converted data, and a first unit for controlling each unit.
A base station including a control unit, a second receiving unit that receives the radio waves of the first transmitting unit, a demodulating unit that demodulates the received signal, and a first memory unit that stores the demodulated signal are stored. A second code reading unit that reads packet data of a signal, a television camera that captures a scene, an A / D conversion unit that converts a video signal of the television camera into a digital signal, and a compression unit that compresses the converted data. And a second memory unit for storing compressed data, the television camera, the A / D conversion unit, the compression unit and the second memory unit are combined, and a plurality of these units are installed and read by the second reading unit. A switching unit for switching the corresponding second memory unit in response to a camera selection signal of data, a second packet generating unit for generating a packet of a data communication procedure, and a second modulating unit for modulating a transmission signal. A terminal station including a second transmitting unit that transmits a modulated signal, a second antenna that is connected to the second receiving unit and the second transmitting unit and that transmits and receives radio waves, and a second control unit that controls each unit. A television camera monitoring device comprising: 2. A second input section for setting the brightness, zoom, etc. of the television camera, and a lens drive section for controlling the brightness, zoom, etc. of the camera for the television camera, and the first storage section. 2. The television camera monitoring device according to claim 1, wherein the data input by the second input unit is stored in the. 3. The television camera monitoring apparatus according to claim 1, wherein the video signals stored in the plurality of second memory units are switched and transmitted in a set order.