Web Trading System

Abstract

To provide a web witness system that allows virtual witnessing from a remote place to a work site to be effectively performed.SOLUTION: In a web witness system 1 of the present invention, a first terminal device 2 installed on a work site 6 side and a second terminal 3 installed on a remote place 7 side communicate with each other via a server device 4 on a communication network 5. The first terminal device 2 is communicatively connected to each of a plurality of cameras 21 and 22 that photograph the inside of a work area 60 at the work site 6, a speaker 23 that outputs voice in the work area 60, and a microphone 24 to which voice in the work area 60 is input. The cameras 21 and 22, the speaker 23, and the microphone 24 are installed in the work area 60 isolated, whereas the first terminal device 2 is installed outside the work area 60.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to a web attendance system for virtually attending work at a work site from a remote location via a communication network. [Background technology]

[0002] In recent years, a witness system has been proposed in which a work site is captured by a camera and transmitted as video data to a remote location via a communication network, allowing the work procedures and the like to be confirmed from the remote location (see Patent Document 1). In the witness system of Patent Document 1, information terminal devices used at the work site and the remote location communicate with each other via a communication network, thereby realizing virtual witnessing of the work site from the remote location. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 6466988 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the case of the attendance system described in Patent Document 1, the number of images that can be viewed remotely is limited by the number of cameras attached to the information terminal device used on-site. Therefore, if the information terminal device on-site is a desktop computer with a fixed camera, the images that the remote location wants to view cannot be acquired, which may result in insufficient attendance work from the remote location. On the other hand, if the information terminal device on-site is a tablet device or smartphone, the worker on-site must hold the information terminal device so that they can take pictures, which may cause disruption to work on-site, such as interrupting work to take pictures.

[0005] The present invention has been made to solve the above-mentioned problems, and has as its object to provide a web attendance system that can effectively perform virtual attendance at a work site from a remote location. [Means for solving the problem]

[0006] The remote attendance system of the present invention is a web attendance system for virtually attending a work site from a remote location by having a first terminal device installed on the work site side and a second terminal device installed on the remote location side communicate via a server device on a communication network, wherein the first terminal device is communicatively connected to a plurality of cameras that photograph the work site, a speaker that outputs audio within the work site, and a microphone that inputs audio within the work site, and the cameras, the speaker, and the microphone are installed within the isolated work site, while the first terminal device is installed outside the work site. [Effects of the Invention]

[0007] According to the present invention, because the video images from the first terminal device connected to multiple cameras are transmitted to the second terminal device, it is possible to select the video images to be displayed in real time at the remote location from the multiple captured video images. Therefore, the work content being performed at the work site can be confirmed from multiple angles at the remote location, and the details of the work can be discussed with the workers, just as if they were actually present. This makes it possible to respond to urgent requests from clients and to respond to clients who are geographically distant. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a diagram illustrating a web trading system according to an embodiment of the present invention. [Figure 2] FIG. 2 is a diagram showing the configuration of each device in a work site in the web attendance system of FIG. 1. DETAILED DESCRIPTION OF THE INVENTION

[0009] An online witnessing system according to an embodiment of the present invention will be described with reference to Figures 1 and 2. Figure 1 is a diagram showing the overall configuration of the online witnessing system according to this embodiment. Figure 2 is a diagram showing the configuration of each device within the work site in the online witnessing system of Figure 1.

[0010] In the present embodiment, the web attendance system 1 realizes virtual attendance at the work site 6 from the remote location 7 by having a first terminal device 2 installed at the work site 6 and a second terminal device 3 installed at the remote location 7 communicate with each other via a server device 4 on a communication network 5. That is, the first terminal device 2 deployed at the work site 6 and the second terminal device 3 deployed at the remote location 7 geographically distant from the work site 6 transmit and receive video and audio data via the communication network 5. This enables video and audio communication between a worker 6h performing work at the work site 6 and a requester 7h at the remote location 7 who has requested the work from the worker 6h at the work site 6, and the requester 7h can check the work content of the worker 6h from the remote location 7 without actually being present at the work site 6.

[0011] The communication network 5 includes a wide area network (WAN) 51 such as the Internet, and connects a site-side network (first LAN) 61 provided at the work site 6 with a remote location-side network (second LAN) 71 provided at the remote location 7. That is, a first terminal device 2 provided at the work site 6 is communicatively connected to the first LAN 61, and a second terminal device 3 provided at the remote location 7 is communicatively connected to the second LAN 71, so that the first and second terminal devices 2 and 3 communicate via the WAN 51 and the first and second LANs 61 and 71, respectively.

[0012] In this case, the server device 4 may be installed in a location different from the work site 6 and the remote location 7 and connected to a different network connected to the first and second LANs 61, 71 via the WAN 51, or may be installed at the work site 6 and communicatively connected to the first LAN 61. Furthermore, in the communication network 5, the first and second LANs 61, 71 are communicatively connected via the WAN 51, but the network connecting the first and second LANs 61, 71 may be configured as a mobile communication network or a network including a mobile communication network and a wide area network (WAN).

[0013] At the work site 6, the first terminal device 2 is communicatively connected to a plurality of cameras 21, 22 that capture images of a work area 60 at the work site 6, a speaker 23 that outputs audio into the work area 60, and a microphone 24 that receives audio from within the work area 60. The cameras 21, 22, speaker 23, and microphone 24 are installed within the isolated work area 60, while the first terminal device 2 is installed outside the work area 60. An input interface (keyboard and mouse) 25 that accepts input to the first terminal device 2 is installed within the work area 60. The work area 60 where the worker 6h performs work is an area surrounded by a facility that isolates it from the outside environment, such as a laboratory, clean room, freezer, or warming room.

[0014] The first terminal device 2 is communicatively connected to the cameras 21 and 22, the speaker 23, the microphone 24, and the input interface 25. In this case, the cameras 21 and 22, the speaker 23, the microphone 24, and the input interface 25 may be wired and connected to the first terminal device 2 via a connector cable such as a USB (Universal Serial Bus). Alternatively, the cameras 21 and 22, the speaker 23, the microphone 24, and the input interface 25 may be communicatively connected to the first terminal device 2 via a wired or wireless connection to a first LAN 61 to which the first terminal device 2 is communicatively connected. When the first terminal device 2 is connected to the devices 21 to 25 in the work area 60 by wire, when cables for connection are installed passing through the inside and outside of the work area 60, the passing locations must be sealed.

[0015] In this embodiment, the cameras 21 and 22, the speaker 23, and the microphone 24 are configured to be able to communicate with the first LAN 61 via wireless LAN, and communicate with the first terminal device 2. Meanwhile, the input interface 25 and the first terminal device 2 are communicatively connected via wireless communication such as Bluetooth (registered trademark). Furthermore, an input interface (remote controller) 26 that accepts input to the first terminal device 2 is installed in the work area, and the input interface 26 and the first terminal device 2 are communicatively connected via infrared communication. Note that the cameras 21 and 22, the speaker 23, and the microphone 24 may be communicatively connected directly with the first terminal device 2 via wireless communication such as Bluetooth (registered trademark). Furthermore, the input interface 25 may be communicatively connected with the first terminal device 2 by being configured to be able to communicate with the first LAN 61 via wireless LAN.

[0016] The first terminal device 2 has a video editing unit 201 that selects or combines multiple pieces of video data received from multiple cameras 21, 22 to create one edited video data, and transmits the video data edited by the video editing unit 201 to the second terminal device 3. When the first terminal device 2 receives an input specifying the images to be selected or combined in the video editing unit 201, the first terminal device 2 determines the images to be selected or combined in the video editing unit 201 in accordance with the image instruction signal from the input, and creates edited video data.

[0017] On the other hand, when the second terminal device 3 receives an input instructing an image to be selected or synthesized in the video editing unit 201, it transmits an image instruction signal corresponding to the input to the first terminal device 2. Then, the first terminal device 2 determines an image to be selected or synthesized in the video editing unit 201 in accordance with the image instruction signal received from the second terminal device 3, and creates edited video data. The first terminal device 2 also has an edited data recording medium 202 that stores the edited video data created by the video editing unit 201.

[0018] The first terminal device 2 is provided with a recording medium 203 for recording a plurality of pieces of video data received from a plurality of cameras 21, 22, and the recording medium 203 synchronously records the plurality of pieces of video data. The recording medium 203 may be configured integrally with the editing data recording medium 202, or a recording medium 203 may be provided in the first terminal device 2 for each of the cameras 21, 22.

[0019] Camera 21A, one of multiple cameras 21 installed in work area 60, captures fixed-point images of both worker 6h and work object 6X in work area 60 at work site 6. Camera 21B, one of multiple cameras 21, captures fixed-point images of a main part of work object 6X in work area 60 at work site 6. Camera 22 is a wearable camera worn by worker 6h working in work area 60 at work site 6. In this embodiment, video data captured by three cameras, two fixed cameras 21 (21A, 21B) and one wearable camera 22, is transmitted to first terminal device 2, but the number of fixed cameras 21 and wearable cameras 22 is not limited to this.

[0020] As described above, the cameras 21 and 22, the speaker 23, the microphone 24, the input interfaces 25 and 26, and the first terminal device 2 are installed at the work site 6, so that the video data captured by the cameras 21 and 22 and the audio data recorded by the microphone 24 are combined in the first terminal device 2 and transmitted to the second terminal device 3 via the communication network 5. On the other hand, when the first terminal device 2 receives the video data and audio data transmitted from the second terminal device 3, it transmits the audio data to the speaker 23 to output the audio, and also outputs an image based on the video data on the display 27, which will be described later.

[0021] As a result, the requester 7h at the remote location 7 can confirm the work content of the worker 6h on the work object 6X at the work site 6 from the video output on the display (not shown) of the second terminal device 3. The requester 7h can also talk to the worker 6h at the work site 6 by listening to the audio output on the speaker (not shown) of the second terminal device 3 and inputting audio from the remote location 7 into the microphone (not shown) of the second terminal device 3. Therefore, the requester 7h can consult with the worker 6h about the work content on the work object 6X at the remote location 7, while checking the work content of the worker 6h, just as in the case of an actual attendance, at the remote location 7 away from the work site 6.

[0022] The following describes an example of the configuration of the first terminal device 2. The first terminal device 2 includes a video editing unit 201 that creates one edited video data by selecting or synthesizing multiple video data, video receiving units 204A, 204B, and 205 that are connected to cameras 21A, 21B, and 22 via wireless communication, respectively, an audio sending unit 206 and an audio receiving unit 207 that are connected to speaker 23 and microphone 24 via wireless communication, an edited data recording medium 202 that stores the edited video data created by video editing unit 201 and the audio data received by audio receiving unit 207, and each of video receiving units 204A, 204B, and 205. The first terminal device 2 is equipped with a recording medium 203 that extracts and stores video data from the received signal, input receiving units 208 and 209 that receive signals from the input interfaces 25 and 26, a video transmitting unit 210 that transmits video data to the display 27, a network interface 211 that transmits work site side signals based on edited video data created by the video editing unit 201 and audio data received by the audio receiving unit 207, and receives remote location side signals from the communication network 5, and a control unit 212 that controls the operation of each unit in the first terminal device 2.

[0023] Fixed cameras 21A and 21B are equipped with video transmitters 251A and 251B that perform wireless communication with video receivers 204A and 204B of first terminal device 2, respectively, and wearable camera 22 is equipped with video transmitter 252 that performs wireless communication with video receiver 205 of first terminal device 2. Speaker 23 and microphone 24 are equipped with audio receiver 253 and audio transmitter 254 that perform wireless communication with audio transmitter 206 and audio receiver 207, respectively. Display 27 is also equipped with video receiver 255 that performs wireless communication with video transmitter 210 of first terminal device 2.

[0024] In this configuration example, speaker 23 and microphone 24 are configured as separate bodies, but speaker 23 and microphone 24 may be configured as an integrated body, or may be an earphone microphone that can be worn by worker 6h. Speaker 23 may be attached to display 27, and microphone 24 may be attached to fixed camera 21 (21A, 21B). Speaker 23 and microphone 24 may also be attached to wearable camera 22 or display 27.

[0025] In this configuration example, video receiving units 204A, 204B, and 205 of first terminal device 2 communicate with video transmitting units 251A, 251B, and 252 of fixed cameras 21A and 21B and wearable camera 22, using different frequency channels. Meanwhile, audio transmitting unit 206 and audio receiving unit 207 of first terminal device 2 communicate with audio receiving unit 253 and audio transmitting unit 254 of speaker 23 and microphone 24, using one of the frequency channels used by video receiving units 204A, 204B, and 205. Furthermore, video transmitting unit 210 of first terminal device 2 communicates with video receiving unit 255 of display 27, using a frequency channel different from the frequency channel used by video receiving units 204A, 204B, and 205.

[0026] At the work site 6, a worker 6h performs work on a work object 6X within a work area 60. Examples of work include contracted processing of chemicals, prototyping of machines and electrical equipment, inspection of various products, and selection and processing of raw materials to be used in various products. Note that the work is not limited to the above-mentioned work, and the web witness system 1 of this embodiment can be used for any similar work.

[0027] In such a work site 6, when fixed camera 21A captures an image of a worker 6h working on a work object 6X in work area 60 (the overall state of work area 60), video data from the captured image is transmitted from video transmission unit 251A to first terminal device 2. Furthermore, when fixed camera 21B captures an image of a main part of work object 6X in work area 60, video data from the captured image is transmitted from video transmission unit 251B to first terminal device 2. Furthermore, when wearable camera 22 worn by worker 6h captures an image of a subject in the direction of the worker 6h's viewpoint, video data from the captured image is transmitted from video transmission unit 252 to first terminal device 2.

[0028] First terminal device 2 receives video signals from fixed cameras 21A and 21B and wearable camera 22 via first LAN 61 at video receiving units 204A, 204B, and 205. Video receiving units 204A, 204B, and 205 send the received video signals as video data to video editing unit 201. Based on instructions from worker 6h or client 7h, video editing unit 201 selects or combines the video data from video receiving units 204A, 204B, and 205 and sends it to network interface 211.

[0029] That is, when an instruction is given to play back the entire video in the work area 60, the video editing unit 201 selects the video data from the video receiving unit 204A and uses it as edited video data. When an instruction is given to play back the video of the work object 6X, the video editing unit 201 selects the video data from the video receiving unit 204B and uses it as edited video data. When an instruction is given to play back the video from the viewpoint of the worker 6h, the video editing unit 201 selects the video data from the video receiving unit 205 and uses it as edited video data.

[0030] Furthermore, when simultaneous playback of the entire video within the work area 60 and the video of the work object 6X is instructed, the video editing unit 201 combines the video data from the video receiving units 204A and 204B to generate edited video data. When simultaneous playback of the entire video within the work area 60 and the video from the viewpoint of the worker 6h is instructed, the video editing unit 201 combines the video data from the video receiving units 204A and 205 to generate edited video data. When simultaneous playback of the video of the work object 6X and the video from the viewpoint of the worker 6h is instructed, the video editing unit 201 combines the video data from the video receiving units 204B and 205 to generate edited video data. When playback of all videos is instructed, the video editing unit 201 combines the video data from the video receiving units 204A and 205 to generate edited video data.

[0031] When multiple pieces of video data are combined in the video editing unit 201, the image sizes of the respective pieces of video data may be made the same and arranged side by side. Alternatively, the image size of one piece of video data (main video data) among the multiple pieces of video data to be combined may be made larger than the image size of the remaining pieces of video data (sub video data). In this case, the main video data and the sub video data may be combined by arranging them side by side, or by overlapping the sub video data on the main video data.

[0032] When the worker 6h instructs the video to be played back and output, the worker 6h operates either of the input interfaces 25, 26 to provide instructions regarding the video to be played back and output to the first terminal device 2. When the first terminal device 2 receives an input signal from either of the input interfaces 25, 26 at either of the input receiving units 208, 209, the instruction data in the input signal is provided to the video editing unit 201, and the video editing unit 201 generates edited video data based on the instruction data. At this time, the worker 6h confirms the video to be selected or synthesized from the client 7h through a call with the client 7h, and operates either of the input interfaces 25, 26.

[0033] On the other hand, when the requester 7h instructs the video to be played back and output, the requester 7h operates the input interface (shown in the appendix) of the second terminal device 3, and an instruction signal including instructions regarding the video to be played back and output is transmitted from the second terminal device 3 to the first terminal device 2 via the communication network 5. When the first terminal device 2 receives the instruction signal from the second terminal device 3 at the network interface 211, the instruction data in the instruction signal is provided to the video editing unit 201, and the video editing unit 201 generates edited video data based on the instruction data.

[0034] The first terminal device 2 may receive an input signal from the worker 6h via either of the input receiving units 208 and 209, and at the same time receive an instruction signal from the requester 7h via the network interface 211. In this case, the video editing unit 201 generates first edited video data in accordance with the instruction of the worker 6h based on the input signal received via either of the input receiving units 208 and 209, while generating second edited video data in accordance with the instruction signal received via the network interface 211. Then, the video editing unit 201 transmits a video signal based on the first edited video data to the display 27, and transmits a signal including the second edited video data to the second terminal device 3. This allows the video desired by the worker 6h to be played on the display 27, while the video desired by the requester 7h to be played on the second terminal device 3.

[0035] Furthermore, when an audio signal of the voice of the worker 6h recorded by the microphone 24 is transmitted from the audio transmitting unit 254, the first terminal device 2 receives the audio signal at the audio receiving unit 207 via the first LAN 61. Then, the first terminal device 2 transmits a work site side signal (first input data signal) consisting of a video signal and an audio signal based on the edited video data from the network interface 211.

[0036] In the above configuration example, fixed cameras 21A and 21B and wearable camera 22 use different frequency channels to perform wireless communication, but they may use the same frequency channel. In this case, for example, by installing a wireless communication router, video signals from fixed cameras 21A and 21B and wearable camera 22 can be transmitted to first terminal device 2 by wireless communication. In this case, speaker 23, microphone 24, and display 27 may also use the same frequency channel as the frequency channel used by cameras 21A, 21B, and 22 to wirelessly communicate with first terminal device 2.

[0037] When measuring instruments for checking the work status are installed in the work area 60 at the work site 6, the measurement values ​​of the measuring instruments may be captured by a fixed camera 21 other than the fixed cameras 21A and 21B, and video data of the captured measurement values ​​may be transmitted to the first terminal device 2. In this manner, the video editing unit 201 of the first terminal device 2 selects or combines images representing the measurement values ​​of the measuring instruments to create edited video data. Therefore, when the second terminal device 3 receives the edited video data of the first terminal device 2 and plays back and outputs the video of the edited video data, a client 7h at a remote location 7 can check the work status from the video of the measurement values ​​captured by the measuring instruments.

[0038] Furthermore, a measuring instrument installed in the work area 60 may be equipped with a communication function, allowing communication between the measuring instrument and the first terminal device 2, so that a measurement signal based on the measurement value from the measuring instrument is transmitted to the first terminal device. In this case, when the first terminal device 2 receives the measurement signal from the measuring instrument, the video editing unit 201 generates an image representing the measurement value based on the received measurement signal, and creates edited video data combining the image with the video captured by the cameras 21A, 21B, and 22. In this way, the second terminal device 3 receives the edited video data from the first terminal device 2 and plays back and outputs the video based on the edited video data, allowing the client 7h at the remote location 7 to check the measurement value from the measuring instrument along with the video captured by the cameras 21A, 21B, and 22.

[0039] Upon receiving the first and second input data signals transmitted from the first and second terminal devices 2 and 3, respectively, the server device 4 combines the first and second input data signals to generate first and second output data signals to be transmitted to the first and second terminal devices 2 and 3. The server device 4 then transmits the generated first and second output data signals to the first and second terminal devices 2 and 3, respectively.

[0040] The first terminal device 2, which has received the first output data signal, transmits the audio data included in the first output data signal to the speaker 23 to play back and output the voice of the client 7h, while the second terminal device 3, which has received the second output data signal, plays back and output the voice of the worker 6h based on the audio data included in the second output data signal. This enables a conversation between the worker 6h at the work site 6 and the client 7h at the remote location 7. At this time, by using the video data transmitted from the first terminal device 2 to the display 27 and the video data obtained from the second output data signal received by the second terminal device 3 as common edited video data, the worker 6h at the work site 6 and the client 7h at the remote location 7 can talk while viewing the same video.

[0041] When communication is performed between the server device 4 and the first and second terminal devices 2 and 3 as described above, the first output data signal is composed of audio data of the voice of the client 7h recorded by the second terminal device 3 and edited video data generated by the first terminal device 2. The second output data signal is composed of audio data of the voice of the worker 6h recorded by the first terminal device 2 and edited video data generated by the first terminal device 2.

[0042] As described above, the first output data signal transmitted from the server device 4 to the first terminal device 2 includes the audio data in the second input data signal, while the second output data signal transmitted from the server device 4 to the second terminal device 3 includes the audio data in the first input data signal. In this case, the first and second output data signals may include the video data (edited video data) in the first input data signal, allowing the worker 6h and the client 7h to view the same video. Alternatively, the first input data signal may not include video data, and the first terminal device 2 may transmit video data obtained by combining the videos from all of the cameras 21A, 21B, and 22 in parallel to the display 27, allowing the worker 6h to view the videos captured by each of the cameras 21A, 21B, and 22.

[0043] If the second terminal device 3 has a photographing function, the second input data signal transmitted from the second terminal device 3 to the server device 4 includes video data of the image of the client 7h photographed by the second terminal device 3. In this case, the first output data signal transmitted to the first terminal device 2 may be a combination of the video data (edited video data) in the first input data signal and the video data and audio data in the second input data signal. Also, the second output data signal transmitted to the second terminal device 3 may be a combination of the video data in the second input data signal and the video data (edited video data) and audio data in the first input data signal.

[0044] In this embodiment, the server device 4 is connected to each of the first and second terminal devices 2 and 3 via a communication network (Internet) 5. It is also possible that the server device 4 is connected to the first terminal device 2 within the first LAN 61, which is the same network at the work site 6, and is connected to the second terminal device 3 via the communication network (Internet) 5. It is also possible that the first terminal device 2 has the functions of the server device 4, and the first terminal device 2 generates a second output data signal and transmits it to the second terminal device 3 via the communication network 5.

[0045] The present invention is not limited to the above-described embodiments, but also includes modifications to the above-described embodiments and appropriate combinations of these modifications. [Explanation of symbols]

[0046] 1. Web Trading System 2. First terminal device 3 Second terminal device 4. Server equipment 5. Communication Network 6. Work site 6h worker 6X Working Object 7. Remote Areas 7h Requester 21 Camera 21A Fixed Camera 21B Fixed Camera 22 Wearable Camera 23 Speaker 24. Mike 25 Input Interface 26 Input Interface 27 Display 51 Wide Area Network (WAN) 60 work area 61 On-site network (1st LAN) 71 Remote network (second LAN) 201 Video Editing Department 202 Recording medium for editing data 203 Recording Media 204A Video receiving unit 204B Video receiving unit 205 Video receiving unit 206 Audio transmission unit 207 Audio receiving unit 208 Input receiving unit 209 Input receiving unit 210 Video transmission unit 211 Network Interface 212 Control Unit 251A Video transmitter 251B Video transmitter 252 Video transmission unit 253 Audio receiving unit 254 Audio Transmitter 255 Video Receiving Unit

Claims

1. A web attendance system for virtually attending a work site from a remote location by communicating between a first terminal device installed at a work site and a second terminal device installed at a remote location via a server device on a communication network, comprising: the first terminal device is communicatively connected to a plurality of cameras that capture images of a work area at the work site, a speaker that outputs audio within the work area, and a microphone that inputs audio within the work area; A web witnessing system characterized in that the camera, the speaker, and the microphone are installed within the isolated work area, while the first terminal device is installed outside the work area.

2. 2. The web trading system according to claim 1, wherein the camera, the speaker, the microphone and the first terminal device are connected to each other by wireless communication.

3. 3. The web trading system according to claim 1, wherein an input interface for accepting input to the first terminal device is installed within the work area, and the input interface and the first terminal device are connected to each other via wireless communication.

4. A web bidding system as described in any one of claims 1 to 3, characterized in that an input interface that accepts input to the first terminal device is installed within the work area, and the input interface and the first terminal device are communicatively connected via infrared communication.

5. The web bidding system described in any one of claims 1 to 4, characterized in that the first terminal device has a video editing unit that selects or combines multiple video data received from multiple cameras to create one edited video data, and transmits the edited video data by the video editing unit to the second terminal device.

6. The web trading system described in claim 5, characterized in that when the first terminal device receives input indicating an image to be selected or synthesized in the video editing unit, it determines the image to be selected or synthesized in the video editing unit in accordance with the image indication signal from the input and creates edited video data.

7. When the second terminal device receives an input indicating an image to be selected or synthesized in the video editing unit, the second terminal device transmits an image indication signal corresponding to the input to the first terminal device; The web trading system described in claim 5, characterized in that the first terminal device determines the images to be selected or synthesized in the video editing unit in accordance with the image instruction signal received from the second terminal device, and creates edited video data.

8. 8. The web trading system according to claim 5, wherein the first terminal device stores edited video data created by the video editing section.

9. 9. The web trading system according to claim 1, wherein the first terminal device has a recording medium for recording a plurality of pieces of video data received from a plurality of the cameras.

10. 10. The web trading system according to claim 9, wherein the recording medium records a plurality of the video data in synchronization.

11. 11. The web attendance system according to claim 1, wherein one of the plurality of cameras photographs both the workers and the work object within the work site.

12. 11. The web attendance system according to claim 1, wherein one of the plurality of cameras takes fixed-point images of a key part of a work object within the work site.

13. The web witnessing system according to any one of claims 1 to 10, characterized in that one of the plurality of cameras is a wearable camera worn by a worker at the work site.

14. 7. The web bidding system according to claim 1, wherein, when the server device receives first and second input data signals transmitted from the first and second terminal devices, respectively, it generates first and second output data signals to be transmitted to the first and second terminal devices by synthesizing the first and second input data signals, and transmits the first and second output data signals to the first and second terminal devices, respectively.

15. 15. The web trading system of claim 14, wherein the first output data signal includes the audio data in the second input data signal.

16. 16. The web trading system according to claim 14, wherein the second output data signal includes the audio data in the first input data signal.

17. 17. The web trading system according to claim 14, wherein the first output data signal is a combination of the video data in the first input data signal and the video data and audio data in the second input data signal.

18. 18. The web trading system according to any one of claims 14 to 17, wherein the second output data signal is synthesized from the video data in the second input data signal and the video data and audio data in the first input data signal.

19. The web witnessing system according to any one of claims 1 to 18, characterized in that the server device is connected to the first terminal device within the same network at the work site, and is connected to the second terminal device via the Internet.

20. 19. The web trading system according to claim 1, wherein the server device is connected to each of the first and second terminal devices via the Internet.

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