CN108093209B - Image transmission system and mobile camera device - Google Patents
Image transmission system and mobile camera device Download PDFInfo
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- CN108093209B CN108093209B CN201711133571.2A CN201711133571A CN108093209B CN 108093209 B CN108093209 B CN 108093209B CN 201711133571 A CN201711133571 A CN 201711133571A CN 108093209 B CN108093209 B CN 108093209B
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 52
- 238000001514 detection method Methods 0.000 claims description 81
- 238000004891 communication Methods 0.000 claims description 62
- 230000006835 compression Effects 0.000 claims description 48
- 238000007906 compression Methods 0.000 claims description 48
- 238000003384 imaging method Methods 0.000 claims description 18
- 230000003247 decreasing effect Effects 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 31
- 238000000034 method Methods 0.000 description 13
- 230000003287 optical effect Effects 0.000 description 12
- 238000006243 chemical reaction Methods 0.000 description 11
- 230000006870 function Effects 0.000 description 10
- 239000004065 semiconductor Substances 0.000 description 9
- 230000000694 effects Effects 0.000 description 6
- 230000007547 defect Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 2
- 238000007792 addition Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000033001 locomotion Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/18—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
- H04N7/181—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast for receiving images from a plurality of remote sources
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
- H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
- H04N19/134—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the element, parameter or criterion affecting or controlling the adaptive coding
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
- H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
- H04N19/134—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the element, parameter or criterion affecting or controlling the adaptive coding
- H04N19/136—Incoming video signal characteristics or properties
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
- H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
- H04N19/134—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the element, parameter or criterion affecting or controlling the adaptive coding
- H04N19/146—Data rate or code amount at the encoder output
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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Studio Devices (AREA)
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
Abstract
The present invention provides a system for determining an optimal bit rate for video transmission in a system comprising a plurality of mobile cameras and a server. For this purpose, the plurality of mobile cameras are provided with a CCD, an encoder, a GPS acquisition unit, and a transceiver unit. The server determines priorities for a plurality of mobile cameras based on the position information acquired by the GPS acquisition unit, and determines bit rates for the respective mobile cameras. The plurality of mobile cameras encode the video data at the determined bit rate and transmit the encoded video data to the server.
Description
Technical Field
The present invention relates to capturing and transmitting images using a mobile camera and a server.
Background
Patent document 1 detects a person and an object and controls a transmission rate (bit rate) of a fixed camera. This enables efficient use of a limited transmission capacity.
Prior art literature
Patent literature
Patent document 1: japanese patent laid-open No. 2008-283230
Disclosure of Invention
Problems to be solved by the invention
The invention provides an image transmission system capable of efficiently controlling a plurality of image transmissions from a camera group consisting of a mobile camera and a fixed camera, in which the cameras themselves move, by a server.
Means for solving the problems
The image transmission system of the present invention includes: a plurality of mobile camera devices, and a server that receives images from the plurality of mobile camera devices.
The plurality of mobile camera devices are provided with: an imaging unit that captures an image; an image compression unit that compresses an image; a priority detection unit that detects the priority of an image; and a camera transmitting unit for transmitting the priority and the video to the server.
The server is provided with: a CPU that sets a higher transmission bit rate for a mobile camera device having a higher priority and sets a lower transmission bit rate for a mobile camera device having a lower priority according to the priority; and a transmission bit rate transmitting section that transmits the transmission bit rate to the plurality of mobile camera apparatuses.
The plurality of mobile camera apparatuses determine a compression rate of the image compression section based on the received transmission bit rate.
Effects of the invention
The video transmission system according to the present invention is effective in efficiently utilizing the frequency band of the network to which the server is connected, because the server can specify the compression rate of video data for each of the plurality of mobile cameras based on the position information of the plurality of mobile cameras.
Drawings
Fig. 1 is a schematic diagram showing a connection structure of an image transmission system in embodiment 1.
Fig. 2 is a schematic diagram for explaining correspondence between map information and priorities in embodiment 1.
Fig. 3 is a block diagram showing the structure of the mobile camera in embodiment 1.
Fig. 4 is a block diagram showing the structure of a fixed camera in embodiment 1.
Fig. 5 is a block diagram showing the structure of a server in embodiment 1.
Fig. 6 is a diagram for explaining image display of the moving camera and the fixed camera in embodiment 1.
Fig. 7 is a diagram for explaining a plurality of image displays of the moving camera and the fixed camera in embodiment 1.
Fig. 8 is a sequence diagram illustrating the operation of the video transmission system in embodiment 1.
Fig. 9 is a diagram for explaining a relationship between position information of a mobile camera and a bit rate in embodiment 1.
Fig. 10 is a sequence diagram illustrating an operation using human object detection in embodiment 1.
Fig. 11 is a block diagram showing the structure of the mobile camera in embodiment 2.
Fig. 12 is a block diagram showing the structure of the mobile camera in embodiment 3.
Fig. 13 is a block diagram showing the structure of a mobile camera in embodiment 4.
Fig. 14 is a block diagram showing the structure of the mobile camera in embodiment 5.
Fig. 15 is a schematic diagram showing a connection structure of a network using a smart phone in other embodiments.
Description of the reference numerals
100. 101, 102, 180, 190, 210, 220, 230, 231, 232, A, B moving camera
103. Fixed camera
104. 234 Internet
105. 235 server
106 GPS satellite
110. Region(s)
111. Range capable of photographing
112. The range that cannot be photographed
113. Barrier object
121、131、181、191、211、221 CCD
122. 132, 182, 192, 212, 222A/D converter
123. 133, 183, 193, 213, 223 encoder
124. 185, 194, 215, 225 GPS acquisition unit
125、134、142、184、195、214、224 CPU
126. 135, 141, 186, 196, 216, 226 transceiver
127. 197, 227 person detection/object detection unit
143. Display unit
144. Display device
150. 160 image display
151. 152, 153, 161, 162, 163 thumbnail images
154. Center picture
164. 165 multiple displayed central pictures
170. Bit rate correspondence table
147. 187, 198, 217, 228 memory
148. 188, 218, 229 map information
199. 219 bit rate threshold
236. 237, 238 smart phones.
Detailed Description
Hereinafter, embodiments will be described in detail with reference to the drawings as appropriate. However, too detailed explanation may be omitted. For example, a detailed description of known matters may be omitted, and a repeated description of substantially the same structure may be provided. This is to avoid that the following description becomes too lengthy for the person skilled in the art to understand.
In addition, the drawings and the following description are provided for a full understanding of the present invention by those skilled in the art, and are not intended to limit the subject matter recited in the appended claims.
(embodiment 1)
Hereinafter, embodiment 1 will be described with reference to fig. 1 to 10.
[1-1. Structure ]
[1-1-1. Connection Structure of image Transmission System ]
Fig. 1 is a schematic diagram showing a connection structure of an image transmission system 10 in embodiment 1. As shown in fig. 1, the image transmission system 10 includes: a plurality of mobile cameras each including a mobile camera 100, a mobile camera 101, and a mobile camera 102, a fixed camera 103, and a server 105. The plurality of mobile cameras 100, 101, 102 and the fixed camera 103 are connected to a network, and the server 105 acquires, records, and displays images captured by the plurality of mobile cameras 100, 101, 102 and the fixed camera 103 via the network. The mobile cameras 100, 101, 102 can be connected to a server 105 via the internet 104 or the like by using a wireless network. The fixed camera 103 can be connected to the server 105 via the internet 104 by using a wired network. The mobile cameras 100, 101, 102 receive signals from the GPS satellites 106, and grasp the respective position information. In the present embodiment, the mobile cameras 100, 101, and 102 all have the same function. The moving camera provided in the image transmission system 10 is not limited to 3.
The relationship between the position information of the mobile camera and the priority in the video transmission system 10 according to embodiment 1 will be described with reference to fig. 2. Fig. 2 is a schematic diagram for explaining correspondence between map information and priorities in embodiment 1. Fig. 2 is a view of the area 110 shown by the map information from above. In this area 110, a fixed camera 103 is arranged, and an obstacle 113 is present. The individual users carrying the mobile cameras 100, 101, 102 also walk around the area 110 and take images with the individual mobile cameras.
As shown in fig. 2, the area 110 is divided into a range 111 that can be photographed from the fixed camera 103 and a range 112 that cannot be photographed due to the presence of the obstacle 113. Along with this, the priority of the image photographed by the mobile camera is divided into two. One is a case of an image captured by the mobile camera 101 existing in the range 111 that can be captured by the fixed camera 103. The other is the case of images captured by the mobile cameras 100 and 102 existing in the range 112 where the fixed camera 103 cannot capture. When the mobile cameras 100 and 102 are in the range 112 where photographing is impossible, the priority of the video from the mobile cameras 100 and 102 is set to be high, and when the mobile camera 101 is in the range 111 where photographing is possible, the priority of the video from the mobile camera 101 is set to be low.
1-1-2. Structure of Mobile Camera ]
The configuration of the mobile camera according to embodiment 1 will be described with reference to fig. 3. Fig. 3 is a block diagram showing the structure of the mobile video camera 100. The mobile camera 100 has: a CCD121 that captures an object image; an a/D converter 122 for digitally converting a signal obtained by imaging by the CCD121; an encoder 123 for performing a codec conversion on the image data digitally converted by the a/D converter 122; a GPS acquisition unit 124 that acquires position information using GPS; a person detection/object detection unit 127 for detecting a specific person or object from the image data of the a/D converter 122; and a transmitting/receiving unit 126 for transmitting the video data compressed by the encoder 123 and the position information from the GPS acquisition unit 124 to the server 105 via a network. The mobile video camera 100 further includes a CPU125, and the CPU125 receives and acquires the bit rate information transmitted from the server 105 through the transceiver 126 and instructs the encoder 123 on the compression rate based on the bit rate information. The following describes the structure of the mobile camera 100 in detail. The mobile cameras 101 and 102 have the same configuration as the mobile camera 100, and are sometimes referred to as the mobile camera 100 on behalf of the mobile cameras 100, 101, and 102.
The CCD121 captures an object image, and generates image data (video data). The CCD121 includes: a color filter, a light receiving element, and an AGC (Auto Gain Controller, automatic gain controller). The light receiving element converts an optical signal collected by the optical system into an electrical signal to generate image information. The AGC amplifies an electrical signal output from the light receiving element.
An a/D converter (analog-to-digital converter) 122 converts analog image data generated by the CCD121 into digital image data.
The encoder 123 compresses the digital image data converted by the a/D converter 122 in a compression form or the like conforming to the h.264 standard or the h.265 standard under the control of the CPU 125. Further, an upper limit bit rate, which is a compression rate at the time of compression, is indicated by the CPU 125.
The GPS acquisition unit 124 receives signals from the GPS satellites 106 and acquires positional information of longitude and latitude based on the signals. Further, the GPS acquisition unit 124 transmits the acquired position information to the transmission/reception unit 126.
The person detection/object detection unit 127 detects a specific person or object on the image using the video data of the a/D converter 122. Further, the person detection/object detection unit 127 transmits information of the detected person or object (hereinafter referred to as "person object detection information") to the server 105 by the transceiver unit 126. The method for detecting the person or the object may be a known method for detecting the person (face authentication) or the object by a digital video camera.
The transmitting/receiving unit 126 is connected to a wireless network, and transmits/receives data.
The CPU125 obtains the bit rate information from the server via the transmitting/receiving unit 126, and instructs the encoder 123 to compress video data based on the bit rate information.
[1-1-3. Structure of fixed Camera ]
The structure of the fixed camera according to embodiment 1 will be described with reference to fig. 4. Fig. 4 is a block diagram showing the structure of the fixed camera 103 in embodiment 1. The fixed camera 103 has: a CCD131 that captures an object image; an a/D converter 132 for digitally converting a signal obtained by imaging by the CCD131; an encoder 133 for performing a codec conversion on the image data digitally converted by the a/D converter 132; and a transmitting/receiving unit 135 for transmitting the video data compressed by the encoder 133 to a server via a network. The fixed camera 103 further includes a CPU134, and the CPU134 receives and acquires the bit rate information transmitted from the server via the transceiver 135, and instructs the encoder 133 on the compression rate based on the bit rate information. The structure of the fixed camera 103 is described in detail below.
The CCD131 captures an object image, and generates image data (video data). The CCD131 includes: a color filter, a light receiving element, and an AGC (Auto Gain Controller, automatic gain controller). The light receiving element converts an optical signal collected by the optical system into an electrical signal to generate image information. The AGC amplifies an electrical signal output from the light receiving element.
An a/D converter (analog-to-digital converter) 132 converts analog image data generated by the CCD131 into digital image data.
The encoder 133 compresses the digital image data generated by the CCD131 and converted in accordance with a compression form or the like conforming to the h.264 standard or the h.265 standard under the control of the CPU 134. Further, the upper limit bit rate at the time of compression is instructed by the CPU 134.
The transmitting/receiving unit 135 is connected to a wired network, and transmits/receives data.
The CPU134 obtains the bit rate information from the server via the transmitting/receiving unit 135, and instructs the encoder 133 to compress video data based on the bit rate information.
[1-1-4. Structure of server ]
The structure of the server according to embodiment 1 will be described with reference to fig. 5. Fig. 5 is a block diagram showing the structure of the server 105 in embodiment 1. The server 105 has: a transmitting/receiving unit 141 for transmitting/receiving data to/from the mobile camera 100 and the fixed camera 103 via a network; a CPU142 that determines a transmission bit rate based on the position information and the person object detection information received from the transmitting/receiving section 141; a memory 147 storing map information 148; and a display unit 143 and a display 144 for acquiring and displaying the image data from the transmitting/receiving unit 141. The structure of the server 105 is described in detail below.
The transmitting/receiving unit 141 is connected to a wired network, and transmits/receives data.
The CPU142 acquires position information and person object detection information from the mobile cameras via the transmitting/receiving unit 141, determines the transmission bit rate for each mobile camera based on the map information 148 stored in the memory 147 in accordance with the determination of the priority shown in fig. 2 (the priority determination method based on the person object detection information will be described later), and transmits the determined transmission bit rate to the mobile camera 100 and the fixed camera 103 via the transmitting/receiving unit 141.
The display 143 and the display 144 display images received from the mobile camera 100 and the fixed camera 103 via the transceiver 141.
1-2 Structure of Screen display of moving Camera image and fixed Camera image
The configuration of a display screen of an image captured by the moving camera and the fixed camera according to embodiment 1 will be described with reference to fig. 6 and 7. Fig. 6 is a diagram for explaining an image display 150 for displaying images from the moving camera and the fixed camera in embodiment 1. Fig. 7 is a diagram for explaining an image display 160 for displaying images from the moving camera and the fixed camera in embodiment 1.
In an upper portion of the image display 150 shown in fig. 6, thumbnail images of cameras currently being photographed are displayed on thumbnail images 151, 152, 153. The thumbnail images are displayed at 1fps (fps: frame per second, frames per second). The camera images selected by clicking the upper thumbnail images 151, 152, 153 with a mouse or the like are displayed largely on the center screen 154 of the image display 150. On the large center screen 154, a video with a high priority (i.e., a video from a mobile camera that is determined to be with a high priority and set to a high transmission bit rate by the CPU 142) is displayed. Therefore, the server 105 can also determine the priority of the video data based on the intention (selection) of the operator, and acquire a video (high-bit-rate video) determined to be high in priority.
In an upper portion of the video display 160 shown in fig. 7, thumbnail images of cameras currently being photographed are displayed on thumbnail images 161, 162, 163. The thumbnail images are displayed at 1fps (fps: frame per second, frames per second). In the center screens 164 and 165 shown in fig. 7, a plurality of camera images selected by clicking the upper thumbnail screens 161, 162, 163 with a mouse or the like are displayed. The plurality of displayed images are images determined to have a high priority (high-bit-rate images). In addition, the bit rates of the plurality of displayed images are all the same. Therefore, a plurality of high-priority videos (high-bit-rate videos) can be acquired based on the intention of the operator of the server 105.
[1-3. Action ]
The operation of the plurality of mobile cameras and the server 105 configured as described above will be described below. The plurality of mobile cameras and the server 105 perform respective operations based on the position information of each of the plurality of mobile cameras. The respective operations are described in detail below.
[1-3-1. Change of bit rate based on position information ]
Fig. 8 is a sequence diagram illustrating the operation in embodiment 1. Fig. 8 shows the plurality of mobile cameras 100, 101 by two mobile cameras A, B for convenience, but is not limited thereto. Fig. 8 is an explanatory diagram when the mobile camera a is located in the range 112 where the fixed camera 103 of fig. 2 cannot capture, and the mobile camera B is located in the range 111 where the fixed camera of fig. 2 can capture.
In step S001, the mobile camera a periodically acquires position information and transmits the position information to the server.
Further, in step S002, the mobile camera B periodically acquires position information and transmits the position information to the server.
In step S003, the server 105 determines whether or not the mobile camera a and the mobile camera B enter a range that can be photographed by the fixed camera 103 by referring to the map information 148 stored in the memory 147 based on the position information of the mobile camera a transmitted in step S001 and the position information of the mobile camera B transmitted in step S002, thereby determining the priority. That is, the CPU142 of the server 105 sets the priority of the mobile camera a for the range 112 that the fixed camera 103 cannot capture higher than the mobile camera B for the range 111 that can capture.
The server 105 transmits the bit rate information to the mobile camera a and the mobile camera B based on the determination result of step S003, so that the transmission bit rate is increased for the mobile camera a and decreased for the mobile camera B (step S004). When transmitting the bit rate information to the plurality of mobile cameras, the server 105 transmits the bit rate information in the order from the low bit rate to the high bit rate. By transmitting in order from low to high with the bit rate changed, video data having a high bit rate can be transmitted after the transmission band is left.
In step S005, the mobile camera B increases the compression rate designated to the encoder 123 in accordance with the received bit rate information, and transmits the video data encoded at the increased compression rate to the server 105.
Further, in step S006, the mobile camera a reduces the compression rate designated to the encoder 123 in accordance with the received bit rate information, and transmits the video data encoded at the reduced compression rate to the server 105.
[1-3-2. Correspondence of position information to bit Rate ]
Fig. 9 is a diagram for explaining a relationship between position information of a mobile camera and a bit rate in embodiment 1. In step S003 of fig. 8, the server refers to the bit rate correspondence table 170 of fig. 9 to determine the bit rate for each mobile camera.
Fig. 9 is a table showing the corresponding bit rates in the case where the two moving cameras, moving camera a and moving camera B, move within the area 110 shown in fig. 2.
In the case where both the mobile camera a and the mobile camera B exist within the range that the fixed camera can photograph, the priorities for the mobile camera a and the mobile camera B are judged to be low, and both are designated with a low bit rate (case 1).
When the mobile camera a is present in a range that the fixed camera can photograph and the mobile camera B is present in a range that the fixed camera cannot photograph, the mobile camera B is determined to have a higher priority than the mobile camera a, the bit rate for the mobile camera a is reduced, and the bit rate for the mobile camera B is increased (case 2).
When the mobile camera B is present in a range that the fixed camera is able to photograph and the mobile camera a is present in a range that the fixed camera is unable to photograph, the mobile camera a determines that the priority is higher than the mobile camera B, and the bit rate for the mobile camera B is reduced and the bit rate for the mobile camera a is increased (case 3).
In the case where both the mobile camera a and the mobile camera B exist in a range where the fixed camera cannot photograph, the priorities for the mobile camera a and the mobile camera B are judged to be high, and both are designated with high bit rates (case 4).
[1-3-3 ] change in bit rate based on position information and person object detection information ]
Further, fig. 10 is a sequence diagram illustrating an operation in the case where the human object detection information is used to determine the priority of the video data.
In step S101, the mobile camera a periodically acquires position information, and transmits the position information and the person and object detection information to the server 105 together with the detection result of the specific person and object by the person detection/object detection unit 127.
Further, in step S102, the mobile camera B periodically acquires position information, and transmits the position information and the person and object detection information to the server 105 together with the detection result of the specific person and object by the person detection/object detection unit 127.
In step S103, the server 105 determines the priority based on the position information and the person object detection information of the mobile camera a transmitted in step S101, the position information and the person object detection information of the mobile camera B transmitted in step S102, and the map information (S103), and decides the bit rates for the mobile camera a and the mobile camera B (S104).
First, according to the table of bit rates shown in fig. 9, it is determined whether or not the video camera is any of case 1, case 2, case 3, and case 4, based on the position information of the video camera a and the position information of the video camera B. Then, in case 1 and case 4, when a specific person or object is detected with the person object detection information from the mobile camera a and a specific person or object is not detected with the person object detection information from the mobile camera B, the server determines that the priority of the mobile camera a is higher than the priority of the mobile camera B, and makes a decision to increase the bit rate of the mobile camera a and decrease the bit rate of the mobile camera B. In contrast, in case 1 and case 4, when a specific person or object is detected by the person object detection information from the mobile camera B and a specific person or object is not detected by the person object detection information from the mobile camera a, the server determines that the priority of the mobile camera B is higher than the priority of the mobile camera a, and makes a decision to increase the bit rate of the mobile camera B and decrease the bit rate of the mobile camera a.
When determining the bit rates for the mobile cameras A, B, the server 105 transmits the bit rate information to the mobile camera A, B. The mobile camera A, B, which has received the bit rate information, changes the compression rate of the video data by the encoder 123 in accordance with the bit rate information, and transmits the video data encoded at the changed compression rate to the server 105 (S105, S106).
[1-4. Effect, etc. ]
As described above, in the present embodiment, the video transmission system 10 includes a plurality of mobile cameras 100 (an example of a mobile camera device) and the server 105 that receives video data from the plurality of mobile cameras 100. The mobile camera 100 includes: a CCD121 (an example of an imaging unit) that captures an object image; an a/D converter 122 for digitally converting a signal obtained by imaging by the CCD 121; an encoder 123 (an example of an image compression unit) that performs codec conversion on the image data digitally converted by the a/D converter 122; a GPS acquisition unit 124 (an example of a position information acquisition unit) that acquires position information (an example of information for determining priority) using GPS; a person detection/object detection unit 127 (an example of a detection unit) for detecting a person or an object from the image data of the a/D converter 122; a transmitting/receiving unit 126 (an example of a camera transmitting/receiving unit) for transmitting the video data compressed by the encoder 123 and the position information to the server 105 via a network; and a CPU125 (an example of a camera control unit) that obtains the bit rate information transmitted from the server 105 from the transmitting/receiving unit 126 and instructs the encoder 123 on the compression rate.
Further, the server 105 includes: a transceiver 141 (an example of a server transceiver) that transmits and receives data to and from the plurality of mobile cameras 100 and the fixed camera 103 (an example of a fixed camera device) via a network; determining a bit rate based on the position information and the person object detection information (an example of information for determining priority) received from the transmitting/receiving section 141, and transmitting the bit rate information to the CPU142 (an example of a server control section) of the mobile camera 100 and the fixed camera 103 via the transmitting/receiving section 141; a display unit 143 for acquiring and displaying the image data from the transmitting/receiving unit 141; and a display 144.
In this way, the video transmission system can specify the compression rate of video data for each mobile camera by the server based on the position information of the plurality of mobile cameras, and can efficiently use the frequency band of the network to which the server is connected.
(embodiment 2)
Embodiment 2 will be described below with reference to fig. 11. In the video transmission system 10 according to embodiment 1, the determination of the bit rate is performed by the server, but the determination of the priority may be performed by the mobile camera. Hereinafter, embodiment 2 will be described in the case where priority is determined by a mobile camera. In embodiment 2, the network connection structure is the same as that in embodiment 1.
[2-1. Structure of Mobile Camera ]
The configuration of the mobile camera according to embodiment 2 will be described with reference to fig. 11. Fig. 11 is a block diagram showing the structure of the mobile camera 180 in embodiment 2. The mobile camera 180 has: a CCD181 that captures an object image; an a/D converter 182 for digitally converting a signal obtained by imaging by the CCD181; an encoder 183 for performing a codec conversion on the image data digitally converted by the a/D converter 182; a GPS acquisition unit 185 that acquires position information using GPS; a transmitting/receiving unit 186 for transmitting the video data compressed by the encoder 183 to the server 105 via a network; a CPU184 that instructs the encoder 183 on the compression rate based on the position information transmitted from the GPS acquisition unit 185 and the map information 188 stored in the memory 187; and a memory 187 that holds map information 188. Hereinafter, the structure of the mobile camera 180 will be described in detail.
The CCD181 captures an object image and generates image data (video data). The CCD181 includes a color filter, a light receiving element, and an AGC (Auto Gain Controller, automatic gain controller). The light receiving element converts an optical signal collected by the optical system into an electrical signal to generate image information. The AGC amplifies an electrical signal output from the light receiving element.
An a/D converter (analog-to-digital converter) 182 converts analog image data generated by the CCD181 into digital image data.
The encoder 183 compresses the digital image data generated and converted by the CCD181 in a compression form or the like conforming to the h.264 standard or the h.265 standard under the control of the CPU184. Further, the upper limit bit rate at the time of compression is instructed by the CPU184.
The GPS acquisition unit 185 receives a signal from the GPS satellite 106, and acquires position information such as latitude and longitude information based on the signal. Further, the GPS acquisition unit 185 transmits the acquired position information to the CPU184.
The transmitting/receiving unit 186 is connected to a wireless network, and transmits/receives data.
The CPU184 receives the position information from the GPS acquisition unit 185, determines the priority of the video data based on the map information 188 and the position information on the memory 187, and designates the encoder 183 as the upper limit bit rate of the compression rate. Specifically, the bit rate of the video data is reduced when the mobile camera 180 is within a range that the fixed camera 103 can capture, and the bit rate of the video data is increased when the mobile camera 180 is within a range that the fixed camera cannot capture.
[2-2. Effect, etc. ]
As described above, in the present embodiment, the mobile camera 180 (an example of the mobile camera apparatus) includes: a CCD181 (an example of an imaging unit) that captures an object image; an a/D converter 182 for digitally converting a signal obtained by imaging by the CCD 181; an encoder 183 (an example of an image compression unit) that performs codec conversion on the image data digitally converted by the a/D converter 182; a GPS acquisition unit 185 (an example of a position information acquisition unit) that acquires position information (an example of information for determining priority) using GPS; a transmitting/receiving unit 186 (an example of a camera transmitting/receiving unit) that transmits the video data compressed by the encoder 183 to the server 105 via a network; a CPU184 (an example of a camera control unit) that instructs the encoder 183 on the compression rate based on the position information transmitted from the GPS acquisition unit 185 and the map information 188 stored in the memory 187.
Thus, the server does not need to have a function of determining priority, and the load on the server can be reduced.
Embodiment 3
Embodiment 3 will be described below with reference to fig. 12.
In embodiment 1, only the compression rate of the encoder is changed based on the bit rate information, but the high-reliability communication path and the low-reliability communication path may be switched based on the bit rate information. The following is an embodiment in the case of switching between a high-reliability communication path and a low-reliability communication path according to bit rate information.
[3-1. Structure of Mobile Camera ]
The configuration of the mobile camera according to embodiment 3 will be described with reference to fig. 12. Fig. 12 is a block diagram showing the structure of the mobile camera 190. The mobile camera 190 has: a CCD191 that captures an object image; an a/D converter 192 for digitally converting a signal obtained by imaging by the CCD191; an encoder 193 for performing a codec conversion on the image data digitally converted by the a/D converter 192; a GPS acquisition unit 194 that acquires position information using GPS; a person detection/object detection unit 197 for detecting a specific person or object from the image data of the a/D converter 192; a transmitting/receiving unit 196 that transmits the video data compressed by the encoder 193 to the server 105 via a network, and is connected to two communication paths, i.e., a high-reliability communication path and a low-reliability communication path; a CPU195 that instructs the encoder 193 to compress the bit rate based on the bit rate information transmitted from the server via the transmitting/receiving unit 196; and a memory 198 holding a bit rate threshold 199. The structure of the mobile camera 190 will be described in detail below.
The CCD191 captures an object image, and generates image data (video data). The CCD191 includes a color filter, a light receiving element, and an AGC (Auto Gain Controller, automatic gain controller). The light receiving element converts an optical signal collected by the optical system into an electrical signal to generate image information. The AGC amplifies an electrical signal output from the light receiving element.
An a/D converter (analog-to-digital converter) 192 converts analog image data generated by the CCD191 into digital image data.
The encoder 193 compresses digital image data generated by the CCD191 and converted in accordance with a compression format or the like conforming to the h.264 standard or the h.265 standard under the control of the CPU 195. Further, the upper limit bit rate at the time of compression is indicated by the CPU 195.
The GPS acquisition unit 194 receives signals from the GPS satellites 106, and acquires positional information such as latitude and longitude information based on the signals. The GPS acquisition unit 194 further transmits the acquired position information to the transmission/reception unit 196.
The person detection/object detection unit 197 detects a specific person or object on the image using the video data of the a/D converter 192. Further, the person detection/object detection unit 197 transmits information of the detected person or object (person object detection information) to the server 105 by the transmission/reception unit 196. The method for detecting the person or the object may be a known method for detecting the person (face authentication) or the object by a digital video camera.
The transmitting/receiving unit 196 is connected to the wireless network 1 as a high-reliability communication path and the wireless network 2 as a low-reliability communication path, and performs data transmission/reception by switching the connection. Here, the high-reliability communication path is a communication path with little defect of the IP packet, and the low-reliability communication path is a communication path with much defect of the IP packet. The high-reliability communication path is an example of a high-speed communication line, and the low-reliability communication path is an example of a low-speed communication line.
The CPU195 receives the bit rate information transmitted from the server 105 via the transmitting/receiving section 196, and specifies an upper limit bit rate, which is a compression rate, to the encoder 193 based on the bit rate information. Further, when the specified bit rate is equal to or higher than the bit rate threshold 199 on the memory 198, the CPU195 instructs the transmitter/receiver 196 to switch so that the wireless network 1 using the high-reliability communication path is used. The transmitting/receiving unit 196 that receives the switching instruction performs communication using the wireless network 1 of the high-reliability communication path. When the specified bit rate is smaller than the bit rate threshold 199 on the memory, the CPU195 instructs the transceiver 196 to switch so that the wireless network 2 using the low-reliability communication path is used. The transceiver 196 that receives the switching instruction performs communication using the wireless network 2 of the low-reliability communication path. The switching between the network 1 and the network 2 may be a method of switching a wireless Access Point (AP), or may be a method of switching a SIM in a mobile router in which a plurality of SIMs are inserted.
[3-2. Effect etc. ]
As described above, in the present embodiment, the mobile camera 190 (an example of the mobile camera apparatus) includes: a CCD191 (an example of an imaging unit) that captures an object image; an a/D converter 192 for digitally converting a signal obtained by imaging by the CCD 191; an encoder 193 (an example of an image compression unit) for performing codec conversion on the image data digitally converted by the a/D converter 192; a GPS acquisition unit 194 that acquires position information (an example of information for determining priority) using GPS; a person detecting/object detecting unit 197 (an example of a detecting unit) for detecting a specific person or object from the image data of the a/D converter 192; a transmitting/receiving unit 196 (an example of a camera transmitting/receiving unit) that transmits the video data compressed by the encoder 193 to the server 105 via a network, and is connected to two communication paths, i.e., a high-reliability communication path and a low-reliability communication path; a CPU195 (an example of a camera control unit) that instructs the encoder 193 to compress the bit rate information transmitted from the server 105 via the transmitting/receiving unit 196; and a memory 198 holding a bit rate threshold 199.
The mobile camera 190 switches the transmission destination of the video data to the high-reliability communication path or the low-reliability communication path based on the bit rate specified with reference to the bit rate threshold 199. Thus, the image can be more reliably transmitted with higher priority.
Embodiment 4
Embodiment 4 will be described below with reference to fig. 13.
[4-1. Structure of Mobile Camera ]
The configuration of the mobile camera according to embodiment 4 will be described with reference to fig. 13. Fig. 13 is a block diagram showing the structure of the mobile camera 210. The mobile camera 210 has: a CCD211 for capturing an object image; an a/D converter 212 for digitally converting a signal obtained by imaging by the CCD211; an encoder 213 for performing a codec conversion on the image data digitally converted by the a/D converter 212; a GPS acquisition unit 215 that acquires position information using GPS; a transmitting/receiving unit 216 that transmits the video data compressed by the encoder 213 to a server via a network, and is connected to two communication paths, i.e., a high-reliability communication path and a low-reliability communication path; a CPU214 that instructs the encoder 213 on the basis of the position information transmitted from the GPS acquisition unit 215 and the map information 218 stored in the memory 217; and a memory 217 holding map information 218 and bit rate thresholds 219. Hereinafter, the structure of the mobile camera 210 will be described in detail.
The CCD211 captures an object image, and generates image data (video data). The CCD211 includes a color filter, a light receiving element, and an AGC (Auto Gain Controller, automatic gain controller). The light receiving element converts an optical signal collected by the optical system into an electrical signal to generate image information. The AGC amplifies an electrical signal output from the light receiving element.
An a/D converter (analog-to-digital converter) 212 converts analog image data generated by the CCD211 into digital image data.
The encoder 213 compresses the digital image data generated by the CCD211 and converted in accordance with a compression form or the like conforming to the h.264 standard or the h.265 standard under the control of the CPU214. Further, the upper limit bit rate at the time of compression is instructed by the CPU214.
The GPS acquisition unit 215 receives signals from the GPS satellites 106 and acquires positional information such as latitude and longitude information based on the signals. Further, the GPS acquisition unit 215 transmits the acquired position information to the CPU214.
The transmitting/receiving unit 216 is connected to the wireless network 1 as a high-reliability communication path and the wireless network 2 as a low-reliability communication path, and performs data transmission/reception by switching the connection. Here, the high-reliability communication path is a communication path with little defect of the IP packet, and the low-reliability communication path is a communication path with much defect of the IP packet.
The CPU214 receives the position information from the GPS acquisition unit 215, and specifies an upper limit bit rate, which is a compression rate, to the encoder 213 based on the map information 218 and the position information on the memory 217, so that the bit rate is reduced when the mobile camera 210 is present in a range that the fixed camera is able to capture, and the bit rate is increased when the mobile camera 210 is present in a range that the fixed camera is not able to capture. Further, when the specified bit rate is equal to or higher than the bit rate threshold 219 in the memory 217, the CPU214 instructs the transmitter/receiver 216 to switch so that the wireless network 1 using the high-reliability communication path is used. The transmitting/receiving unit 216 that receives the switching instruction performs communication using the wireless network 1 of the high-reliability communication path. Further, when the specified bit rate is smaller than the bit rate threshold 219 in the memory 217, the CPU214 instructs the transceiver 216 to switch so that the wireless network 2 using the low-reliability communication path is used. The transceiver 216 that receives the switching instruction performs communication using the wireless network 2 of the low-reliability communication path. The switching between the network 1 and the network 2 may be a method of switching a wireless Access Point (AP), or may be a method of switching a SIM in a mobile router in which a plurality of SIMs are inserted.
[4-2. Effect etc. ]
As described above, in the present embodiment, the mobile camera 210 (an example of the mobile camera apparatus) includes: a CCD211 (an example of an imaging unit) that captures an object image; an a/D converter 212 for digitally converting a signal obtained by imaging by the CCD 211; an encoder 213 (an example of an image compression unit) for performing codec conversion on the image data digitally converted by the a/D converter 212; a GPS acquisition unit 215 (an example of a position information acquisition unit) that acquires position information (an example of information for determining priority) using GPS; a transmitting/receiving unit 216 (an example of a camera transmitting/receiving unit) that transmits the video data compressed by the encoder to the server via the network, and is connected to two communication paths, i.e., a high-reliability communication path and a low-reliability communication path; a CPU214 (an example of a camera control unit) that instructs the encoder on the compression rate based on the position information transmitted from the GPS acquisition unit 215 and the map information 218 stored in the memory 217; and a memory 217 holding a bit rate threshold 219.
That is, the mobile camera 210 determines the bit rate at which video data is transmitted based on the position information acquired by the GPS and the map information 218 stored in the memory 217, and switches the transmission destination of the video data to the high-reliability communication path or the low-reliability communication path based on the bit rate with reference to the bit rate threshold 219. Thus, the server does not need to have a function of determining priority, and the load on the server can be reduced, and the video can be more reliably transmitted at a higher bit rate of transmission.
Embodiment 5
Embodiment 5 will be described below with reference to fig. 14.
[5-1. Structure of Mobile Camera ]
The configuration of the mobile camera according to embodiment 5 will be described with reference to fig. 14. Fig. 14 is a block diagram showing the structure of the mobile camera 220. The mobile camera 220 has: a CCD221 that captures an object image; an a/D converter 222 for digitally converting a signal obtained by imaging by the CCD221; an encoder 223 for performing a codec conversion on the image data digitally converted by the a/D converter 222; a GPS acquisition unit 225 that acquires position information using GPS; a transmitting/receiving unit 226 for transmitting the video data compressed by the encoder 223 to a server via a network; a person detection/object detection unit 227 for detecting a specific person or object from the image data of the a/D converter 222; a CPU224 that instructs the encoder 223 to compress the image based on the position information transmitted from the GPS acquisition unit 225, the map information stored in the memory 228, and the detection result of the person detection/object detection unit; and a memory 228 that holds map information 229. Hereinafter, the structure of the mobile camera 220 will be described in detail.
The CCD221 captures an object image, and generates image data (video data). The CCD221 includes a color filter, a light receiving element, and AGC (Auto Gain Controller, automatic gain control). The light receiving element converts an optical signal collected by the optical system into an electrical signal to generate image information. The AGC amplifies an electrical signal output from the light receiving element.
An a/D converter (analog-to-digital converter) 222 converts analog image data generated by the CCD221 into digital image data.
The encoder 223 compresses the digital image data generated by the CCD221 and converted in a compression form or the like conforming to the h.264 standard or the h.265 standard under the control of the CPU224. Further, the upper limit bit rate at the time of compression is indicated by the CPU224.
The GPS acquisition unit 225 receives signals from the GPS satellites 106, and acquires positional information such as latitude and longitude information based on the signals. Further, the GPS acquisition unit 225 transmits the acquired position information to the CPU224.
The person detection/object detection unit 227 uses the video data of the a/D converter 222 to detect a specific person or object on the image. Further, the person detection/object detection unit 227 sends information of the detected person or object (person object detection information) to the CPU224. The method for detecting the person or the object may be a known method for detecting the person (face authentication) or the object by a digital video camera.
The transmitting/receiving unit 226 is connected to a wireless network, and transmits/receives data.
The CPU224 receives the position information from the GPS acquisition unit 225, and specifies an upper limit bit rate as a compression rate to the encoder 223 based on the position information, the map information 229 on the memory 228, and the detection result of the person detection/object detection unit 227. In addition, the priority of the mobile camera 220 to transmit the image data to the server 105 is determined by the upper limit bit rate. In the judgment of the priority using the map information 229, the position information, and the person object detection information, the CPU224 increases the priority in the case where the mobile camera 220 is located in the range 112 where the fixed camera 103 shown in fig. 2 cannot photograph (case 1). Further, the CPU224 performs an operation of lowering the priority (case 2-1) in the case where the moving camera 220 is located in the range 111 where the fixed camera 103 shown in fig. 2 can capture, and raising the priority (case 2-2) in the case where the person object detection is being performed, in the case where the person object detection is not being performed.
In addition, in the determination based on the priority of the position information and the person object detection information, the determination based on the person object detection information can be performed with priority. That is, when the specific video (for example, a specific motion of a person or a person) is included in the person object detection information, the priority of the video data may be increased independently of the position information.
[5-2. Effect etc. ]
As described above, in the present embodiment, the mobile camera 220 (an example of the mobile camera apparatus) includes: a CCD221 (an example of an imaging unit) that captures an object image; an a/D converter 222 for digitally converting a signal obtained by imaging by the CCD 221; an encoder 223 (an example of an image compression unit) for performing codec conversion on the image data digitally converted by the a/D converter 222; a GPS acquisition unit 225 (an example of a position information acquisition unit) that acquires position information (an example of information for determining priority) using GPS; a transmitting/receiving unit 226 (an example of a camera transmitting/receiving unit) for transmitting the video data compressed by the encoder 223 to a server via a network; a person detection/object detection unit 227 (an example of a detection unit) that detects a specific person or object from the image data of the a/D converter 222; a memory 228 storing map information 229; and a CPU224 (an example of a camera control section). The CPU224 instructs the encoder 223 on the compression rate based on the position information transmitted from the GPS acquisition unit 225, the map information 229 stored in the memory 228, and the detection result of the person detection/object detection unit 227.
Thus, the server does not need to have a function of determining the bit rate, and the load on the server can be reduced, and the video can be transmitted more reliably and efficiently when the priority is high.
(other embodiments)
As described above, embodiments 1 to 5 are described as examples of the technology disclosed in the present application. However, the technique of the present invention is not limited to this, and can be applied to embodiments in which modifications, substitutions, additions, omissions, and the like are performed. The components described in embodiments 1 to 5 may be combined to form a new embodiment. Therefore, other embodiments are exemplified below.
In embodiments 1 to 5, the mobile camera incorporates a GPS acquisition unit that acquires position information based on information from the GPS satellites 106, but this embodiment is not necessarily required. For example, the mobile camera may be configured to acquire position information from the smart phone.
Fig. 15 is a schematic diagram showing a state when a plurality of mobile cameras and fixed cameras are connected to a network, and images captured by the mobile cameras and the fixed cameras are recorded and displayed by a server. The mobile cameras 230, 231, 232 (an example of a mobile camera device) can be connected to a server 235 via the internet 234 or the like using a network sharing (linking) function of smartphones 236, 237, 238, respectively. The fixed camera 103 can be connected to a server 235 via the internet 234 using a wired network. Further, by installing dedicated applications to the smartphones 236, 237, 238, the mobile cameras 230, 231, 232 can acquire position information of the smartphones via the network, respectively. In addition, the above has been described with respect to the mobile cameras 230, 231, 232, all of which have the same function.
In embodiments 1 to 5, a GPS acquisition unit using GPS is described as an example of a position information acquisition unit of a mobile camera device. The position information may be acquired by a method capable of specifying the position of the mobile camera device. Therefore, the acquisition of the position information is not limited to the case of using GPS. However, if GPS is used as the acquisition of the positional information, it is not necessary to introduce a device for acquiring the positional information. In addition, wi-Fi may also be used to obtain location information. If Wi-Fi is used to acquire position information, the position information can be acquired even in a place where a GPS satellite cannot be found, such as indoors.
Further, by providing a device for determining a position (a "position determination device") such as a beacon of Bluetooth (registered trademark) or a Color Bit (Color Bit) in a cell line, a warehouse, or the like of a factory, the position acquisition unit of the mobile camera device can acquire its own position. And, the mobile camera apparatus transmits the acquired position information to the server, and the server judges the priority for the mobile camera apparatus based on the received position information. For example, the server may perform control to increase the priority for a mobile camera device existing in the vicinity of the position determination device, transmit bit rate information of a high bit rate to the mobile camera device, and if the mobile camera device is moved away from the vicinity of the position determination device, decrease the priority for the mobile camera device, and transmit bit rate information of a low bit rate to the mobile camera device. By controlling the above, the image from the mobile camera existing in the specific place is reliably transmitted and displayed.
In this case, the person detection/object detection unit of the mobile camera device may detect a specific operation or action together with or instead of detecting a specific person or object. The mobile camera apparatus transmits the detection result as person object detection information to the server, and the server judges the priority for the mobile camera apparatus based on the received position information and person object detection information. For example, the server may perform control to raise the priority for the mobile camera apparatus and transmit the bit rate information of a high bit rate to the mobile camera apparatus in the case where a specific operation is included in the person object detection information, and to lower the priority for the mobile camera apparatus and transmit the bit rate information of a low bit rate to the mobile camera apparatus in the case where a specific operation is not included in the person object detection information. The specific operation includes, for example, a movement of a hand performing a specific operation, an operation of a device, an operation of a tool produced by a worker holding a unit in a factory, an operation of holding/placing an object in a warehouse, and the like. Such an operation is an operation for determining that, in particular, a user of the image display system wants to reliably display an image.
In embodiments 1 to 5, a CCD image sensor is described as an example of an image sensor. The image sensor may be any image sensor that captures an object image and generates image data (video data). Therefore, the image sensor is not limited to the CCD image sensor. However, if a CCD image sensor is used as the image sensor, the image sensor can be obtained at low cost. In addition, a CMOS image sensor may be used as the image sensor. If a CMOS image sensor is used as the image sensor, it is effective in suppressing power consumption.
In embodiments 1 to 5, a CPU is described as a controller for control information. The CPU may be physically configured as long as it is a component for controlling the mobile camera. Therefore, the controller is not limited to the CPU. However, if a programmable microcomputer is used, the processing content can be changed by changing the program, so that the degree of freedom in designing the controller can be improved. In addition, the CPU may also be implemented by hard logic. If the CPU is implemented by hard logic, the processing speed is improved. The controller may be constituted by one semiconductor chip or may be physically constituted by a plurality of semiconductor chips. When the semiconductor chip is constituted by a plurality of semiconductor chips, the control described in embodiments 1 to 5 may be realized by different semiconductor chips. In this case, it can be considered that one CPU is constituted by the plurality of semiconductor chips. The CPU may be configured of a semiconductor chip and a member (capacitor or the like) having a function different from that of the semiconductor chip. Further, one semiconductor chip may be configured so as to realize the functions of the CPU and functions other than the CPU.
The above-described embodiments are for illustrating the technology of the present invention, and therefore, various modifications, substitutions, additions, omissions, and the like can be made within the scope of the claims and their equivalents.
Industrial applicability
The present invention can specify the compression rate of an image for each mobile camera by a server based on the position information of a plurality of mobile cameras, and can be applied to a system that efficiently uses the frequency band of a network to which the server is connected. Specifically, the present invention can be applied to a wearable camera, a digital still camera, a video recorder, a portable telephone with a camera function, a smart phone, and the like.
Claims (5)
1. An image transmission system includes:
a plurality of mobile camera devices;
a fixed camera device that captures an image of a specific location; and
a server that receives image data from the plurality of mobile camera devices,
each of the plurality of mobile camera apparatuses has the following structures (1) to (4):
(1) An imaging unit that images an object and generates image data of the object;
(2) An image compression unit that compresses the image data;
(3) A camera control unit that detects information for determining the priority of the video data and determines the compression rate of the video data compressed by the video compression unit; and
(4) A camera transmitting/receiving unit that transmits information for determining the priority and the video data to the server, and receives bit rate information from the server,
the server comprises the following structure (5) and (6):
(5) A server control section that judges the priority based on information for judging the priority, and sets a transmission bit rate for each of the plurality of mobile camera apparatuses according to the priority; and
(6) A server transmitting/receiving section that transmits the bit rate information including the transmission bit rate to each of the plurality of mobile camera devices, and receives information for judging the priority and the video data,
the camera control section decides the compression rate based on the transmission bit rate,
each of the mobile camera devices further includes a position information acquisition unit that acquires position information of the mobile camera device,
the information for judging the priority is the location information,
the server control section judges the priority of the image data transmitted from the mobile camera apparatus according to whether the mobile camera apparatus exists in a range that can be photographed by the fixed camera apparatus based on the position information acquired from the mobile camera apparatus,
The priority of the image data transmitted from the mobile camera device existing in a range that the fixed camera device cannot photograph is judged to be higher than the priority of the image data transmitted from the mobile camera device existing in a range that the fixed camera device can photograph,
the transmission bit rate is increased for the mobile camera device that is brought into a range where the fixed camera device cannot photograph, and the transmission bit rate is decreased for the mobile camera device that is brought into a range where the fixed camera device can photograph.
2. The image transmission system of claim 1, wherein,
each of the mobile camera devices further includes a detection section that generates person object detection information indicating whether or not a specific image is included in the image data,
the information for judging the priority is the person object detection information,
the server control section determines the priority based on the person object detection information.
3. The image transmission system according to claim 1 or 2, wherein,
the camera transmitting/receiving section is connectable to a high-speed communication line having a relatively high communication speed and a low-speed communication line having a communication speed lower than that of the high-speed communication line,
The camera control unit determines a line to which the camera transmitting/receiving unit is connected as the high-speed communication line or the low-speed communication line based on the transmission bit rate.
4. A mobile camera apparatus that transmits captured image data to the outside, the mobile camera apparatus comprising:
a camera control unit that determines a priority of the video data and determines a transmission bit rate of the video data based on the priority;
a video compression unit that changes a compression rate of the video data to be transmitted to the outside based on the transmission bit rate;
a position information acquisition unit that acquires position information of the mobile camera device; and
a detection unit that generates character object detection information indicating whether or not a specific image is included in the captured image,
the camera control section judges the priority based on the position information, judges the priority based on the person object detection information, and prioritizes the priority based on the person object detection information over the priority based on the position information,
the priority of the image data transmitted from the mobile camera device existing in a range that cannot be photographed by the fixed camera device is determined to be higher than the priority of the image data transmitted from the mobile camera device existing in a range that can be photographed by the fixed camera device,
The transmission bit rate is increased for the mobile camera device that is brought into a range where the fixed camera device cannot photograph, and the transmission bit rate is decreased for the mobile camera device that is brought into a range where the fixed camera device can photograph.
5. The mobile camera device of claim 4, wherein,
the video camera device further comprises a camera transmitting/receiving unit which transmits the video data by switching a line connected to the camera transmitting/receiving unit to a high-speed communication line having a relatively high communication speed or to a low-speed communication line having a communication speed slower than that of the high-speed communication line,
the camera control unit determines a line to which the camera transmitting/receiving unit is connected as the high-speed communication line or the low-speed communication line based on the transmission bit rate.
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| JP2016-225642 | 2016-11-21 | ||
| JP2016225642 | 2016-11-21 | ||
| JP2017-197376 | 2017-10-11 | ||
| JP2017197376A JP7029586B2 (en) | 2016-11-21 | 2017-10-11 | Video transmission system and mobile camera equipment |
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| CN108093209A CN108093209A (en) | 2018-05-29 |
| CN108093209B true CN108093209B (en) | 2024-04-12 |
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| EP3672231B1 (en) * | 2018-12-21 | 2021-05-26 | Axis AB | Adaptive storage between multiple cameras in a video recording system |
| CN114257820A (en) * | 2020-09-25 | 2022-03-29 | 华为技术有限公司 | Data transmission method and related device |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000333156A (en) * | 1999-05-20 | 2000-11-30 | Fujitsu General Ltd | Moving picture transmitter |
| CN1578461A (en) * | 2003-07-25 | 2005-02-09 | 株式会社日立制作所 | Information monitoring providing apparatus and information monitoring providing method |
| CN101061721A (en) * | 2005-06-07 | 2007-10-24 | 松下电器产业株式会社 | Monitoring system, monitoring method, and camera terminal |
| CN103548340A (en) * | 2011-05-24 | 2014-01-29 | 日产自动车株式会社 | Vehicle monitoring device and method of monitoring vehicle |
| CN103763513A (en) * | 2013-12-09 | 2014-04-30 | 北京计算机技术及应用研究所 | Distributed tracking and monitoring method and system |
| CN104041016A (en) * | 2012-02-06 | 2014-09-10 | 松下电器产业株式会社 | Camera device, server device, image monitoring system, control method of image monitoring system, and control program of image monitoring system |
| CN104038737A (en) * | 2014-05-30 | 2014-09-10 | 西安交通大学 | Double-camera system and method for actively acquiring high-resolution image of interested target |
| CN105979210A (en) * | 2016-06-06 | 2016-09-28 | 深圳市深网视界科技有限公司 | Pedestrian identification system based on multi-ball multi-gun camera array |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100259539A1 (en) * | 2005-07-21 | 2010-10-14 | Nikolaos Papanikolopoulos | Camera placement and virtual-scene construction for observability and activity recognition |
| US8922659B2 (en) * | 2008-06-03 | 2014-12-30 | Thales | Dynamically reconfigurable intelligent video surveillance system |
-
2017
- 2017-11-15 CN CN201711133571.2A patent/CN108093209B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000333156A (en) * | 1999-05-20 | 2000-11-30 | Fujitsu General Ltd | Moving picture transmitter |
| CN1578461A (en) * | 2003-07-25 | 2005-02-09 | 株式会社日立制作所 | Information monitoring providing apparatus and information monitoring providing method |
| CN101061721A (en) * | 2005-06-07 | 2007-10-24 | 松下电器产业株式会社 | Monitoring system, monitoring method, and camera terminal |
| CN103548340A (en) * | 2011-05-24 | 2014-01-29 | 日产自动车株式会社 | Vehicle monitoring device and method of monitoring vehicle |
| CN104041016A (en) * | 2012-02-06 | 2014-09-10 | 松下电器产业株式会社 | Camera device, server device, image monitoring system, control method of image monitoring system, and control program of image monitoring system |
| CN103763513A (en) * | 2013-12-09 | 2014-04-30 | 北京计算机技术及应用研究所 | Distributed tracking and monitoring method and system |
| CN104038737A (en) * | 2014-05-30 | 2014-09-10 | 西安交通大学 | Double-camera system and method for actively acquiring high-resolution image of interested target |
| CN105979210A (en) * | 2016-06-06 | 2016-09-28 | 深圳市深网视界科技有限公司 | Pedestrian identification system based on multi-ball multi-gun camera array |
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|---|---|
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