JP2014068321A - Transfer device, communication system, transfer method, and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a transfer device, a communication system, a data transfer method, and a program which suppress data missing caused by conversion of data communication protocols and do not apply load of transfer processing to an operation device and load due to control on the processing device.SOLUTION: The transfer device for transferring data communicated between an upstream side and a downstream side comprises: storage means which stores an upstream side packet formed according to the upstream side communication protocol; upstream side control means which receives the upstream side packet to transfer it to the storage means and generates data stream from the upstream side packet stored in the storage means; interpolation means which performs interpolation processing of the data when the data stream has data missing; and downstream side control means which forms a downstream side packet and transmits it to the downstream side in accordance with the downstream side communication protocol from the data stream in which the interpolation processing is performed.

Description

  The present invention relates to a transfer device, communication system, transfer method, and program for transferring data and commands, and in particular, a transfer device for transferring data packets and commands communicated between an upstream operating device and a downstream processing device. The present invention relates to a communication system, a transfer method, and a program.

  In recent years, there has been an increasing number of scenes in which audio data is reproduced by transferring digitized data such as audio data from an information processing apparatus such as a personal computer (PC) to a data reproduction device.

  In such a transfer process, digital data is transferred from the information processing apparatus to the data reproduction device using a protocol called isochronous according to a standard such as USB (Universal Serial Bus).

  The isochronous transfer is a transfer in which a data amount within a predetermined time is guaranteed in a USB communication protocol, and is used for real-time transfer of voice or the like. For this reason, although the transfer rate is high, the data is not retransmitted even if an error is detected, so the reliability of the data transfer process is inferior to other communication protocols.

  When data is transferred via the USB interface, a communication error occurs due to various factors. In isochronous transfer without data retransmission, audio data may be lost during the error period due to a communication error.

  This lack of data is perceived as noise and can be harsh for some users.

  In response to this problem, Patent Document 1 temporarily holds transferred audio data, detects a transfer error, generates interpolation data from data immediately before the time of error detection, and interpolates an error occurrence portion. An audio device is disclosed.

  USB, which is a bus standard for connecting various peripheral devices to a host device, generates a packet and sends transfer data according to specifications such as a transfer speed corresponding to each peripheral device. It is rare that a USB device is directly connected to an information processing apparatus to receive data. Normally, a communication path that first receives data sent from the information processing apparatus is followed by a communication path that supplies data to the USB device. One or more data transfer processes are performed in the USB hub.

  FIG. 7 illustrates an example of a configuration of a communication system that transfers data from the information processing apparatus 710 to the USB speaker 730 that is a USB device.

  In FIG. 7, the data output from the information processing device 710 is transferred to the USB speaker 730 via the wireless USB hub. In this configuration, it is assumed that data is transferred from the information processing apparatus 710 to the wireless USB hub 720 via a wireless line, and data is transferred from the wireless USB hub to the USB speaker 730 using an isochronous transfer protocol.

  From the information processing device 710 to the wireless USB hub 720, data is transmitted over the wireless line as a transfer request (isochronous request pack) in which a plurality of packets are collected. The isochronous request pack includes information on the number of packets included and packet contents such as packet 1 and packet 2 following the start frame. The wireless USB hub 720 generates data to be transferred to the USB speaker 730 by dividing the packet into individual packets (packet 1, packet 2, etc.) based on the received isochronous request pack.

  In isochronous transfer, a generated data packet is transferred without waiting for data. For this reason, if the isochronous request pack development processing in the wireless USB hub 720 is delayed by the transfer interval for sending data to the USB speaker 730, all the data included in the request pack is discarded and large-scale data loss occurs. .

  In order to avoid data loss, it is necessary for the information processing device 710 to control the timing of sending the isochronous request pack in consideration of the timing of isochronous transfer from the wireless USB hub 720 to the USB speaker 730. For this reason, the processing of the information processing device 710 is limited by the data transfer processing.

  On the other hand, the information processing apparatus may control the operation of a USB device such as a USB camera by a command communicated via a communication line. In such a communication system, commands from the information processing apparatus, video data from the USB camera, and the like are transmitted and received according to a communication standard according to the USB protocol.

  At this time, the USB device may add video information by adding a USB camera. By supplementing the added video information, it is possible to obtain subject information that does not depend on the arrangement conditions of the USB camera. Processing for integrating and controlling a plurality of USB devices by adding a USB camera or the like is required of the information processing apparatus.

  In response to this problem, Patent Document 2 discloses a surveillance camera system in which a plurality of surveillance cameras are connected to a personal computer via a hub and an encoder. When the monitor is monitoring the monitoring target with any one of the monitoring cameras, when the monitoring target enters the blind spot of the monitoring camera and the video data of the monitoring target is interrupted, the other monitoring camera is automatically set. Takes over the monitoring process and maintains the tracking operation.

JP 2008-182380 A JP 2009-055180 A

  In the audio device disclosed in Patent Document 1, the processing device that has transmitted the transfer data cannot cope with a large loss of data due to conversion of a communication protocol such as isochronous request pack expansion processing. Further, the processing device on the data transmission side does not control the transfer timing of the transfer data.

  The surveillance camera system described in Patent Document 2 automatically switches surveillance cameras according to the movement of the subject to be monitored based on position information and preset turning information held in advance for a plurality of surveillance cameras.

  However, in the surveillance camera system disclosed in Patent Document 2, the supervisor continues to operate the switched surveillance camera. That is, the surveillance camera system does not control the operation of a plurality of cameras at the same time. In this system, video information captured by a plurality of cameras is discarded except for video information from a camera operated by a supervisor, and integrated video information cannot be acquired.

  The present invention has been made in view of the above-described points, suppresses data loss due to conversion of the data communication protocol, and does not apply a load of transfer processing to the operation device or a load on control of the processing device. It is an object to provide a transfer device, a communication system, a data transfer method, and a program.

  In order to achieve the above object, a transfer device of the present invention is a transfer device for transferring data communicated between an upstream side and a downstream side, and an upstream packet formed according to an upstream communication protocol is transmitted. In the case where there is a data loss in the storage means, the upstream control means that receives the upstream packet and transfers it to the storage means, generates a data stream from the upstream packet held in the storage means, and the data stream Interpolation means for performing data interpolation processing and downstream control means for forming a downstream packet from the data stream subjected to the interpolation processing according to a downstream communication protocol and transmitting the downstream packet to the downstream side.

  The communication system of the present invention is a communication system including a transfer device that transfers data communicated between the operation device and the processing device, and the transfer device is formed according to a communication protocol transmitted from the operation device. Upstream storage means for holding upstream packets transmitted from the apparatus, upstream for receiving upstream packets and transferring them to upstream storage means, and generating a data stream from the upstream packets held in the upstream storage means A downstream packet is formed in accordance with a side control means, an interpolation means for performing data interpolation processing when there is data loss in the data stream, and a communication protocol received by the processing device from the data stream subjected to the interpolation processing. It has the downstream control means which transmits to a processing apparatus, It is characterized by the above-mentioned.

  Furthermore, the data transfer method of the present invention is a data transfer method for transferring data communicated between the operating device and the processing device, and is an upstream formed from the operating device and formed according to a communication protocol transmitted from the operating device. Receiving the side packet, transferring and storing the upstream packet to the upstream storage means, generating a data stream from the upstream packet stored in the upstream storage means, and missing data in the data stream In some cases, the method includes a step of performing data interpolation processing, and a step of forming a downstream packet according to a communication protocol received by the processing device from the data stream subjected to the interpolation processing and transmitting the packet to the processing device. .

  The data transfer program of the present invention is a data transfer program for transferring data communicated between the operating device and the processing device, and is an upstream formed from the operating device and formed in accordance with a communication protocol transmitted from the operating device. Processing for receiving the side packet, processing for transferring and storing the upstream packet to the upstream storage means, processing for generating a data stream from the upstream packet stored in the upstream storage means, and data loss in the data stream In some cases, it is possible to cause a computer to perform a process of performing data interpolation processing and forming a downstream packet according to a communication protocol received by the processing device from the data stream subjected to the interpolation processing and transmitting the packet to the processing device. Features.

  According to the present invention, data loss due to data communication protocol conversion can be suppressed, and the transmission side can send data and commands without being aware of communication protocol conversion and control of the operation of the processing device.

1 shows an example of a configuration of a data transfer apparatus according to a first embodiment of the present invention. An example of the structure of the data communication system which concerns on the 2nd Embodiment of this invention is shown. An example of the structure of the upstream control part which concerns on the 2nd Embodiment of this invention is shown. An example of the structure of the data interpolation part which concerns on the 2nd Embodiment of this invention is shown. 7 is a flowchart illustrating an example of the operation of the data transfer apparatus according to the second embodiment of the present invention. An example of the structure of the data communication system which concerns on the 3rd Embodiment of this invention is shown. An example of the structure of the data communication system in related technology is shown. An example of the structure of the data communication system which concerns on the 3rd Embodiment of this invention is shown. The modification of the structure of the data communication system which concerns on the 3rd Embodiment of this invention is shown.

The best mode for carrying out the invention will be described in detail with reference to the drawings. However, the present invention is not limited to the embodiments described below.
[First Embodiment]
FIG. 1 shows an example of the configuration of a data transfer apparatus according to the first embodiment of the present invention.

  The transfer device 101 transfers data communicated between the upstream side and the downstream side.

  In FIG. 1, the transfer apparatus 101 includes upstream control means, storage means, interpolation means, and downstream control means.

  The upstream control means receives the upstream packet formed according to the upstream communication protocol from the upstream side, and stores it in the storage means. The upstream control unit generates a data stream from the upstream packet held in the storage unit.

  The interpolation means performs data interpolation when there is data loss in the data stream.

  The downstream control unit forms a downstream packet from the data stream subjected to the interpolation processing according to the downstream communication protocol, and transmits the packet to the downstream side.

According to the data transfer apparatus according to the present embodiment, data loss due to data communication protocol conversion can be suppressed, and the transmission side can transmit data and commands without being aware of communication protocol conversion.
[Second Embodiment]
FIG. 2 shows an example of the configuration of a data communication system according to the second embodiment of the present invention.

  The data communication system according to the present embodiment includes an operation device 1001 that transmits transfer data, a processing device 1002 that receives the transmitted transfer data, and a transfer device 101 that transfers the transfer data. The transfer data is not limited to data processed by the processing device, and may be a command for controlling the operation of the processing device 1002 from the operation device 1001.

  The transfer apparatus 101 includes a device control unit 107 that performs reception processing on a packet including transfer data sent from the operation apparatus 1001 according to a predetermined USB protocol. The transfer apparatus 101 includes an upstream control unit 102 that receives the transfer data, determines and processes the transfer data, and an upstream storage unit 105 that temporarily holds data according to an instruction from the upstream control unit 102. The transfer apparatus 101 further includes a data interpolation unit 103 that receives the data stream generated by the upstream control unit 102 and interpolates data when the data stream is missing. The transfer device 101 further includes a downstream control unit 104 that sends the transfer data interpolated by the data interpolation unit 103 to the processing device 1002. The transfer apparatus 101 includes a host control unit 108 that performs transmission processing of packets including transfer data to the processing apparatus 1002 in accordance with a predetermined USB protocol.

  Since the specifications of the device control unit 107 and the host control unit 108 are stipulated as USB standards, detailed descriptions of their functions are omitted.

  Next, each component of the transfer apparatus 101 according to the second embodiment will be described with reference to FIGS. 3 to 5.

  FIG. 5 is a flowchart illustrating an example of a processing procedure of the transfer apparatus 101 according to the second embodiment. FIG. 3 shows an example of the configuration of the upstream storage unit 102 in the transfer apparatus 101 according to the second embodiment.

  The packet sent from the controller device 1001 is received by the device control unit 107 (FIG. 5, step S401) and passed to the upstream control unit 102. For this packet, the selection unit 201 determines whether or not temporary holding is necessary (step S402). That is, as in the data communication system shown in FIG. 7, when the data transfer protocol is different before and after the transfer apparatus 101, protocol conversion may be necessary. In particular, when there is a possibility that the packet is discarded due to a delay in data processing, the packet data is temporarily held (step S403), and the packet data is acquired as necessary.

  When the communication protocol of the transmission path is the same, or in the case of processing such as a command signal from the operation device 1001 that can be expected to cause no delay in stream data processing, the stream processing unit 202 does not hold the packet (S402 NO). The packet is passed to

  The stream processing unit 202 receives the packet and generates stream data (step S404). When packet data is temporarily held in the upstream storage unit, the packet data necessary for generation of the next stream data is taken out from the upstream storage unit 105 as soon as the stream data generation is completed.

  The transfer apparatus 101 according to the present embodiment waits for the amount of data necessary for generating a data packet to be transferred to the USB device to be accumulated, performs data verification, and generates a stream request. That is, if the number of packets received by the transfer device 101 is not sufficient and a predetermined amount of data necessary for stream request generation is not accumulated (NO in S405), the controller device is requested to transmit a packet (step S406). After reaching the predetermined amount (YES in S405), verification processing is performed. Depending on the protocol, stream data is generated after a predetermined amount of data is accumulated (S404).

  The verification process for the data stream detects whether there is any missing data in the data stream. For the verification process, for example, a method of detecting whether or not there is a contradiction such as jumping of the index values included in the header of the packet may be used. Further, it may be detected whether or not there is data loss by detecting data error.

  The generated stream data is sequentially sent to the data interpolation unit 103.

  FIG. 4 shows an example of the configuration of the data interpolation unit 103 in the transfer apparatus 101 according to the second embodiment.

  The data interpolation unit 103 includes a stream data holding unit 301 that temporarily holds a data stream received from the upstream side control unit 102 and a stream request generation unit 302 that generates a transfer request to the downstream side control unit 104. The stream request generation unit 302 generates a stream request according to the rules held by the stream rule holding unit 303 (step S409).

  As a result of the verification processing for the stream data, if data for one packet is missing in the data stream transferred according to isochronous transfer (YES in S407), for example, as shown in FIG. Data is interpolated by repeating (step S408). Thereby, the same sound continues and a sound skip is avoided. The viewer's ears do not detect sound interruptions, and noise generation is suppressed.

  If a packet to be transmitted to the processing device cannot be generated due to a delay in stream data generation, the downstream control unit 104 may associate the packet transmission timing with the delay in stream data generation. At this time, the head portion of the stream data to be carried on the packet is deleted in accordance with the delay of the transmission timing.

  According to the transfer apparatus 101 according to the present embodiment, by causing the transfer apparatus 101 to have a data interpolation function, it is possible to suppress the occurrence of data loss or the like regardless of the processing apparatus. That is, data loss due to a delay in transfer request generation processing with respect to the transfer interval is suppressed to a minimum, such as when the communication protocol is different between before and after the USB hub that performs data transfer. For example, the packet group transmitted in the isochronous request pack is temporarily held in the upstream storage unit 105, and a data stream is generated based on this packet group. When the stream data generation is delayed with respect to the packet transmission timing to the processing device side, the downstream control unit 104 can delay the packet transmission timing, thereby avoiding the discarding of the delayed packet group as a whole. For the portion where the start is delayed, the data is interpolated as appropriate.

  This data interpolation processing does not impose a load on the processing of the controller device 1001. In addition, the controller device 1001 does not need to be aware of the data interpolation processing in the transfer device 101, and only sends data to the processing device 1002. For this reason, there is no need to add a transfer control process to the controller device 1001.

  Since the upstream storage unit 105 holds the packet data transmitted from the operation device 1001, the upstream control unit 102 has a storage function that allows the operation device 1001 to refer to the data held in the transfer device 101. May be. Accordingly, the controller device 1001 can retransmit data to the processing device 1002. Since the data retransmission process is performed by the transfer apparatus 101, the load on the operation apparatus 1001 is reduced.

  In this embodiment, USB is used as a connection path between the controller device 1001 and the transfer device 101, but the present invention is not limited to this. That is, instead of the device control unit 107, an interface having other bus specifications such as a wireless LAN (Local Area Network) or IEEE1394 may be used.

  Further, various USB devices can be supported by appropriately changing the stream rule. In the present embodiment, the interpolation data is generated according to the rule that the previous packet is repeated for one packet loss as a data interpolation method, but is not limited to this. Instead of a packet unit, a data string having a predetermined length may be used as a unit, or a data string having a completely different configuration may be constructed. In the present embodiment, the data interpolation for the data stream in the direction from the controller device 1001 toward the processing device 1002 has been described, but the present invention is not limited to this. A similar interpolation process can be performed for the data stream from the processing device 1002 to the controller device 1001.

Furthermore, in this embodiment, the interpolation process for missing data is performed when a transfer request to the downstream control unit 104 is generated, but the present invention is not limited to this. A verification process may be performed when the data packet is received, and the interpolated data packet may be held. Furthermore, the USB protocol is not limited to isochronous transfer, and other transfer methods may be used.
[Third Embodiment]
FIG. 6 shows an example of the configuration of a data communication system according to the third embodiment of the present invention.

  In the camera transfer device 601 according to the third embodiment, a downstream storage unit 106 that holds data referred to by the downstream control unit 104 is added to the transfer device 101 according to the second embodiment. Since other configurations are the same as those of the second embodiment, the description thereof is omitted.

  A plurality of cameras (three in FIG. 6) are connected to the camera aggregation device 601 according to the present embodiment.

  The camera aggregation device 601 notifies the operation device 1001 that one camera is connected. Upon receiving this notification, the user operates the operation device 1001 so as to operate one camera via the camera aggregation device 601.

  In response to the operation command from the operation device 1001, the downstream control unit 104 makes the same request to all the cameras 602 to 604. The cameras 602 to 604 that have received the same operation control from the downstream control unit 104 transmit the captured video data to the downstream control unit 104.

  Video data captured by a plurality of cameras is held in the downstream storage unit 106, and video data based on the video data is generated.

  For example, stereogram video data can be constructed from video data from two cameras, and three-dimensional video data can be constructed from video data from three cameras. In addition, if a plurality of cameras are arranged adjacent to each other, an image such as a panoramic photograph can be obtained. These newly configured video data are transmitted to the controller device 1001.

  Although the operating device 1001 is operating one camera, in addition to the video data from one camera, it is possible to obtain other types of video data in which the camera is involved.

  The format of the generated video data such as stereogram video data and 3D video data may be specified from the operation device 1001 or may be additionally transmitted.

  As described above, in the present embodiment, it is possible to perform control such that the number of USB devices notified to the operation device 1001 is different from the number of USB devices actually connected.

  Moreover, as long as the same USB device is used, the present invention is not limited to the camera, and for example, audio data may be collected by a plurality of USB microphones. According to this, difference data with input data can be obtained, and there is a use as a noise canceller.

  FIG. 8 shows an example of a data communication system according to the present embodiment.

  In FIG. 8, video data obtained by imaging a subject to be imaged by a plurality of cameras is sent to the camera aggregation device 601. Here, based on the captured video data, video data captured from an angle at which no camera exists with respect to the imaging target is generated. Values regarding specifications necessary for video data generation may be held in the downstream storage unit 106.

  In FIG. 8, camera 1 (602), camera 2 (603), and camera 3 (604) shoot an object to be photographed 801 from diagonally above to obtain video data. Based on the video data from the three cameras, it is possible to generate a video imaged by the virtual camera 605, which is assumed to be directly above the subject 801. Furthermore, it is possible to obtain video data when the virtual camera 605 continues imaging while moving in the right direction on the paper surface. That is, the parameter value at the time of generating the video data is changed so that the ratio of the video data from the camera 2 (603) increases.

  The operation device 1001 instructs the operation of the virtual camera 605 such as imaging the imaging object 801 from above or moving the imaging position to the right. On the other hand, the downstream control unit responds to the operation of the virtual camera 605 by changing each ratio based on the video obtained from the cameras 1 to 3.

  Furthermore, the data returned to the controller device 1001 is not limited to video data or image data, but may be numerical data such as a three-dimensional coordinate value of the object or text data.

  According to the information communication system according to the present embodiment, even when a plurality of USB devices are operated simultaneously to acquire information such as video and audio, control is performed so that one USB device is operated. Thereby, the user can control the operation of the plurality of USB devices with a simple operation. Further, additional information from a plurality of USB devices can be acquired.

  Further, since the above processing is executed by the transfer device as the camera aggregation device 601, the processing of the control device 1001 is not affected.

Furthermore, even if a malfunction occurs in some of the plurality of USB devices due to a failure or the like, the user can continue the operation without being aware of it.
[Modification]
FIG. 9 shows another example of the data communication system according to the present embodiment.

  In the camera aggregation device 901 illustrated in FIG. 9, the host control unit 108 receives data transmitted from a USB device that is not controlled by the operation device 1001 and passes the data to the downstream control unit. The USB device is a USB infrared sensor 904 in a modification of the present embodiment.

  When the camera 903 is connected, the operating device 1001 makes a request for controlling the camera 903. The downstream control unit 104 requests the sensor control unit 902 to acquire data from the USB infrared sensor 904.

  The acquired information changes data transmitted to the controller device 1001. That is, by using the data from the USB infrared sensor 904 for controlling the operation of the camera 903, the acquisition time of the imaging data can be limited. Accordingly, it is possible to control to transmit the video data acquired from the camera 903 to the operation device 1001 only during a period in which the USB infrared sensor 904 detects a human movement. For this reason, the storage capacity of the operating device 1001 can be saved.

  In this embodiment, a USB infrared sensor is used, but the present invention is not limited to this, and a temperature sensor, a USB microphone, or the like may be employed. Alternatively, a brightness sensor may be employed so that the video from the camera is returned only during the period when the light from the illumination is blocked.

  A program for executing the above-described processing operations is stored and distributed in a computer-readable recording medium such as a flexible disk, a CD-ROM (Compact Disk Read-Only Memory), and an MO (Magneto-Optical disk). A device that executes the above-described processing operation may be configured by installing the program in a computer.

  The present invention can be suitably applied to a communication system that operates a processing device by communicating data and commands over a plurality of communication paths via a transfer device such as a USB hub.

101, 1101 Transfer device 102 Upstream control unit 103 Data interpolation unit 104 Downstream control unit 105 Upstream storage unit 106 Downstream storage unit 107 Device control unit 108 Host control unit 201 Selection unit 202 Stream processing unit 301 Stream data holding unit 302 Stream request generation unit 303 Stream rule holding unit 601 901 Camera aggregation device 602 Camera 1
603 Camera 2
604 Camera 3
605 Virtual camera 710 Information processing device 720 Wireless USB hub 730 USB speaker 801 Object to be photographed 902 Sensor control unit 903 Camera 904 Infrared sensor 1001 Operation device 1002 Processing device 1102 Upstream control means 1103 Interpolation means 1104 Downstream control means 1105 Storage means

Claims (10)

A transfer device for transferring data communicated between an upstream side and a downstream side,
Storage means for holding upstream packets formed according to the upstream communication protocol;
Upstream control means for receiving the upstream packet from the upstream side, transferring it to the storage means, and generating a data stream from the upstream packet held in the storage means;
Interpolation means for performing data interpolation processing when there is data loss in the data stream;
A transfer apparatus comprising: a downstream control unit configured to form a downstream packet from a data stream subjected to the interpolation processing according to a downstream communication protocol and transmit the packet to the downstream side. The data transferred from the upstream side to the downstream side is a control signal,
The transfer apparatus according to claim 1, wherein the downstream control unit generates a virtualized control signal based on the control signal and transmits the generated control signal to the downstream side.   The transfer apparatus according to claim 1, wherein the downstream control unit generates virtualized data based on data received from the downstream side and transmits the virtualized data to the upstream side. A transfer apparatus according to any one of claims 1 to 3;
An operating device for supplying the upstream packet to the transfer device;
And a processing device that receives the downstream packet and operates according to the downstream communication protocol. It further has a detection means,
The downstream control unit determines a period for transmitting the data transmitted from the processing device to the operation device based on the detection information detected by the detection unit. The communication system described. A data transfer method for transferring data communicated between an operating device and a processing device,
Receiving an upstream packet formed according to a communication protocol transmitted from the operating device and transmitted from the operating device;
Transferring and storing the upstream packet to an upstream storage means;
Generating a data stream from the upstream packet stored in the upstream storage means;
If there is data loss in the data stream, interpolating data; and
A data transfer method comprising: forming a downstream packet from a data stream subjected to the interpolation processing according to a communication protocol received by the processing device, and transmitting the packet to the processing device. Data transferred from the operating device to the processing device is a control signal,
7. The data transfer method according to claim 6, further comprising a step of generating a control signal for controlling a virtual processing device based on the control signal and transmitting the control signal to the processing device.   The data transfer method according to claim 6, further comprising the step of generating virtualized data based on the data transmitted from the processing device and transmitting it to the operating device.   9. The method according to claim 6, further comprising a step of determining a period during which data transmitted from the processing device is transmitted to the operation device based on detection information detected by a detecting unit. 2. A data transfer method according to item 1. A data transfer program for transferring data communicated between an operating device and a processing device,
A process of receiving an upstream packet formed according to a communication protocol transmitted from the operating device and transmitted from the operating device;
A process of transferring the upstream packet to the upstream storage means and storing it;
Generating a data stream from the upstream packet stored in the upstream storage means;
When there is data loss in the data stream, processing to perform data interpolation processing,
A data transfer program for causing a computer to perform a process of forming a downstream packet from a data stream subjected to the interpolation processing according to a communication protocol received by the processing device and transmitting the packet to the processing device. .

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