JP2007078351A - Information processing apparatus and method therefor, and computer program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To correctly output data corresponding to specified time information time by correcting the error between time information provided for input data and time information specified by an external device. <P>SOLUTION: An information processor is provided with a first time information providing part 120 for providing first time information for data input from a first external device, a second time information acquisition part 122 for acquiring second time information to be a criterion of the time of data output request, an output-request-time error computation part 128 for computing the error of output request time between the first time information and the second time information upon request of data output, a specified-time-error computation part 132 for computing the specified-time error between the first time information and the second time information at the time specified by a second external device on the basis of the error of output request time, and a data output part 130 for outputting data provided with the first time information corresponding to the error of specified time to the second external device. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an information processing apparatus, an information processing method, and a computer program that corrects an error in time information added to data input from an external device and outputs correct data, and particularly records recorded images and sounds. The present invention relates to an information processing apparatus, an information processing method, and a computer program that correct an error in time information at the time of recording and output information corresponding to a specified shooting time.

  Conventionally, there exists an information processing apparatus having a function of recording information input from an external device together with time information and outputting information corresponding to the specified time information. For example, when information captured by a monitoring camera or the like is recorded, information corresponding to a specified time is acquired and the status at that time is confirmed. Therefore, the time information recorded together with the imaged information must be accurate time information.

  However, generally, a built-in clock provided in a recording device or the like has only a simple timekeeping function that allows a certain accuracy error. When the recording apparatus is operated for a long period of time, an error greatly deviating from the reference accurate time occurs. Therefore, accurate time information is acquired, and based on this, the time information of the internal clock is corrected regularly or irregularly, thereby reducing the error in the output time of the internal clock. However, in this case, if accurate time information is never obtained, incorrect time information is recorded, or the order of time information recorded before and after the internal clock is corrected is reversed. There was a problem of being lost.

  Therefore, in order to solve the above problem, a recording apparatus having a correction function for correcting an error of an internal clock using an external time source has been developed (for example, Patent Document 1). In Patent Document 1, a built-in clock of a recording apparatus holds first time information and second time information. The first time information is a count value obtained by counting the pulses of the built-in clock, and the count is started at the same time when the recording apparatus is turned on. The second time information is general time information. When the count value of the first time exceeds a predetermined correction interval, the second time information is based on accurate time information obtained from the time server. If the time information is corrected, or if an event occurs before the second time information is corrected, the second time information is not recorded and only the first time information is recorded. Like to do. Only the first time information is recorded as the time information of the event that occurred before the correction of the second time information, and the time information recorded before and after the built-in clock is corrected. The order will never be reversed.

JP 2004-199410 A

  However, since the first time information is also affected by the error of the built-in clock of the recording device, there has been a problem that the time when the recorded event occurs remains an error. In addition, since the second time information correction is obtained from a time server on the network, the recording apparatus must always be in an environment connected to the network. However, in a device used in an environment that does not need to be connected to a network, there is a problem that constructing a network facility only for correcting time information makes the facility complicated and costly.

  Therefore, the present invention has been made in view of such problems, and the object of the present invention is based on an error between time information given to input data and time information designated by an external device. An object of the present invention is to provide a new and improved information processing apparatus, information processing method, and computer program capable of correctly outputting data corresponding to specified time information.

  In order to solve the above problems, according to an aspect of the present invention, there is provided an information processing apparatus that outputs data input from a first external device to a second external device: data input from the first external device A first time information giving unit for giving first time information to the second time information obtaining unit for obtaining second time information as a reference for the data output request time in response to a data output request from the second external device An output request time error calculation unit for calculating an output request time error between the first time information and the second time information at the time of data output request; a time designated by the second external device based on the output request time error A designated time error calculation unit for calculating a designated time error between the first time information and the second time information; and data output for outputting data to which the first time information corresponding to the designated time error is given to the second external device And comprising Wherein, the information processing apparatus is provided.

  According to the invention, when the data input to the information processing device is stored, the first time information is given, and when the data is requested by the second external device, the first time information, the second time information, It is possible to correctly output the data designated by the second external device based on the error. Thus, the information processing apparatus can always connect to the network and output correct data without correcting its own time information.

  The first time information adding unit may divide the data input from the first external device every predetermined time and add the first time information to each data. Thereby, it is possible to output the divided data divided every predetermined time to the second external device.

  The information processing apparatus further includes a time information correcting unit that corrects the first time information to the second time information, and the time information correcting unit corrects the first time information to the second time information. You may make it hold | maintain time information. As a result, the first time information can be corrected to the second time information serving as a reference, and the first time information can be made accurate.

  The information processing apparatus further includes a data storage unit that stores data to which the first time information is added by the first time information adding unit, and the data output unit receives a specified time from the data stored in the data storage unit. Data with the first time information corresponding to the error may be acquired and output to the second external device.

  The second time information is time information obtained by the second external device accessing the time server, and the first time information is the second time from the time when the time information correction unit corrects the second time information. It may be time information in which an error occurs at a predetermined rate with respect to the information.

  The designated time error calculation unit is designated by the second external device from the correction time point when the first time information is corrected to the second time information until the data output request time point from the second external device. The specified time error may be calculated by calculating a ratio of the time until the specified time in proportion to the output request time error calculated by the output request time error calculation unit. As a result, it is possible to correctly output data at the time designated by the second external device from the error between the first time information and the second time information at the time of the data output request.

  In order to solve the above-described problem, according to another aspect of the present invention, an information processing device that outputs data input from a first external device to a second external device is input from the first external device. A process of giving first time information to data; a process of acquiring second time information as a reference for a data output request time in response to a data output request from a second external device; a first of the data output request time A process for calculating an output request time error between the time information and the second time information; a specified time between the first time information and the second time information at a time specified by the second external device based on the output request time error There is provided a computer program characterized in that: a process for calculating an error; and a process for outputting data to which a first time information corresponding to a specified time error is added to a second external device are executed.

  The computer program is stored in a storage unit included in the computer, and is read and executed by a CPU included in the computer, thereby causing the computer to function as the information processing apparatus. A computer-readable recording medium on which a computer program is recorded is also provided. The recording medium is, for example, a magnetic disk or an optical disk.

  In order to solve the above-described problem, according to another aspect of the present invention, there is provided an information processing method for outputting data input from a first external device to a second external device, wherein the information is input from the first external device. Adding first time information to the data; obtaining second time information serving as a reference for the data output request time in response to a data output request from the second external device; and first data output request time A step of calculating an output request time error between the time information and the second time information; a specified time between the first time information and the second time information at a time specified by the second external device based on the output request time error There is provided an information processing method comprising: calculating an error; and outputting the data to which the first time information corresponding to the specified time error is added to the second external device.

  As described above, according to the present invention, data corresponding to the specified time information is correctly output based on the error between the time information given to the input data and the time information specified to the external device. be able to.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the present specification and drawings, components having substantially the same functional configuration are denoted by the same reference numerals, and redundant description is omitted.

  First, an outline of the present embodiment will be described based on FIG. In the following description, the present invention is applied to an information processing apparatus 100 that can correct an error in time information given to input data and output data at a specified time correctly. To do.

  In the present embodiment, video information and audio information can be applied as an example of input and output data in the present invention. However, the present invention is not limited to this example, and text data such as a text file may be used. The information processing apparatus 100 according to the present embodiment has a function of outputting data input from the first external device to the second external device. Hereinafter, the first external device will be described as the data generation device 200, and the second external device will be described as the computer 300.

  Data generated by the data generation device 200 is input to the information processing device 100 and stored in a storage device provided in the information processing device 100 together with time information. The computer 300 is connected to the information processing apparatus 100 via a network and requests acquisition of desired data. The computer 300 is a device connected to the information processing apparatus 100 when acquiring data stored in the information processing apparatus 100, and requests the information processing apparatus 100 to acquire data by specifying a time. . The information processing apparatus 100 outputs data corresponding to the time designated by the computer 300 to the computer 300.

  Here, the time information given to the data when stored in the storage device included in the information processing apparatus 100 will be described as first time information, and the time specified by the computer 300 will be described as second time information. The second time information is time information obtained by the computer 300 accessing the time server. The second time information may be time information of a built-in clock provided in the computer 300. The computer 300 may always be connected to the network, access the time server to acquire reference time information, and make the time information of the internal clock provided in the computer 300 correspond to the time information of the time server. When connecting to the processing apparatus 100, it may be connected to a network to acquire reference time information from a time server.

  The first time information is time information of a built-in clock provided in the information processing apparatus 100. The first time information is time information in which an error occurs at a predetermined rate with respect to the second time information. Further, when the computer 300 connects to the information processing apparatus 100 and requests acquisition of data, the first time information is corrected to the second time information. That is, the first time information is time information in which an error occurs at a predetermined rate with respect to the second time information from the time point corrected to the second time information.

  Next, the configuration of the information processing apparatus 100, the data generation apparatus 200, and the computer 300 will be described. The data generator 200 is composed of a video photographing device (video camera or the like), a sound collecting device (microphone or the like), and the like, for example, an external video monitoring device (a monitoring device such as an ATM or a vending machine installed outside a financial institution). ) Etc. Data captured or collected by the data generation device 200 is output to the information processing device 100.

  The information processing apparatus 100 includes a CPU (Central Processing Unit) 102, an RTC (Real Time Clock) 104, an encoding processing unit 106, a time correction unit 108, a storage device 110, a network interface (hereinafter referred to as a network I / F) 112, and the like. Composed.

  The CPU 102 is a central processing unit and has a function of controlling the information processing apparatus 100 as a whole. The RTC 104 is a built-in clock of the information processing apparatus 100 and has a function of providing time information. The encoding processing unit 106 has a function of encoding video / audio data input from, for example, a data generator using a compression technique such as MPEG (Moving Picture Experts Group) -4.

  The storage device 110 has a function of storing information encoded by the encoding processing unit 106. The storage device 110 is composed of, for example, a large-capacity hard disk drive. The data stored in the storage device 110 is divided and stored as one data every predetermined time every 1 to 10 minutes, for example. The divided data is given first time information at the time of shooting. You may make it provide the 1st time information at the time of imaging | photography as a name of the divided | segmented data. When the data stored in the storage device 100 is output, the data may be output as a single piece of data, or may be output by connecting data for a predetermined time.

  The time correction unit 108 has a function of correcting the first time information when searching for data at a time specified from the computer 300. The correction of the first time information by the time correction unit 108 will be described in detail later.

  The network I / F 112 is an interface having a function of connecting to the computer 300. The network I / F 112 is used when the computer 300 requests data output, and is not normally connected to other computers.

  The computer 300 includes a CPU 302, an RTC 304, a network I / F 306, an input device 308, a storage device 310, and the like. The CPU 302 is a central processing unit and controls the entire computer 300. The RTC 304 is a built-in clock of the computer 300 and has a function of providing time information. When connecting to the information processing apparatus 100 and acquiring desired data, the computer 300 accesses the time server in advance to acquire reference time information, and corrects the internal clock of the computer 300. That is, the second time information specified when the computer 300 is connected to the information processing apparatus 100 is accurate time information corrected to the time information of the time server.

  A network I / F 306 is an interface having a function of connecting to the information processing apparatus 100. The network I / F 306 is used when connecting to the information processing apparatus 100, but may be used when connecting to a device other than the information processing apparatus 100. The storage device 310 is a device that stores information necessary for the operation of the computer 300 and data output from the information processing device 100, and is, for example, a hard disk drive.

  The configuration of the information processing apparatus 100, the data output apparatus 200, and the computer 300 has been described above. Next, the functional configuration of the information processing apparatus 100 will be described in detail based on FIG.

  FIG. 2 is a block diagram illustrating a functional configuration of the information processing apparatus 100. As shown in FIG. 2, the information processing apparatus 100 includes a first time information adding unit 120, a second time information acquiring unit 122, a time information correcting unit 124, a data storage unit 126, and an output request time error calculation. A unit 128, a data output unit 130, a specified time error calculation unit 132, and the like. The first time information giving unit 120 can exemplify the RTC 104 of FIG. The data output unit 130 can exemplify the network I / F 112 of FIG. The second time information acquisition unit 122, the time information correction unit 124, the output request time error calculation unit 128, and the specified time error calculation unit 132 can exemplify the time correction unit 108 of FIG. The data storage unit 126 can exemplify the storage device 110 of FIG.

  The first time information assigning unit 120 has a function of assigning first time information to data input from the data generating device 200 that is the first external device. Data to which the first time information is added by the first time information adding unit 120 is stored in the data storage unit 126. As described above, the input data may be divided every predetermined time, and the first time information may be assigned to each divided data and stored in the data storage unit 126. For example, as shown in FIG. 3, the shooting data from 0:10:00 to 0:15:00 may be divided and stored every minute. The first time information giving unit 120 gives the first time information to the data divided every minute. For example, time information “−00.10.00” is assigned as the file name of the shooting data to the shooting data from 0:10:00 to 0:11:00. Similarly, time information “−00.11.00” is assigned to the shooting data from 0:11:00 to 0:12:00, and from 0:12:00 to 0:13:00 Time information “−00.12.00” is assigned to the shooting data, and time information “−00.13.00” is assigned to the shooting data from 0:13:00 to 0:14:00. The time information “−00.14.00” is added to the shooting data from 0:14:00 to 0:15:00. In the present embodiment, each shooting data can be identified using the first time information given to each shooting data as the file name of each shooting data. The time for dividing the shooting data may be set in advance, or may be set and changed by the user.

  Returning to FIG. 2, the data storage unit 126 has a function of storing data to which the first time information is added by the first time information adding unit 120.

  The second time information acquisition unit 122 has a function of acquiring second time information serving as a reference at the time of data output request in response to a data output request from the computer 300 as the second external device. As described above, the second time information is reference time information obtained by the computer 300 accessing the time server. The second time information acquisition unit 122 acquires second time information when the computer 300 is connected to the information processing apparatus 100 to request data output.

  The output request time error calculation unit 128 has a function of calculating a time error between the first time information and the second time information at the time of data output request. As described above, the first time information is time information of a built-in clock provided in the information processing apparatus 100, and is time information in which an error occurs at a predetermined rate with respect to the second time information. The output request time error calculation unit 128 calculates an error between the first time information and the second time information at the time when a data output request is made from the computer 300, and sends the calculated error data to the specified time error calculation unit 132. provide.

  The specified time error calculation unit 132 calculates a specified time error between the first time information and the second time information specified by the computer 300 based on the output request time error calculated by the output request time error calculation unit 128. Has a function to calculate. The computer 300 designates time information, for example, “year / month / day / hour / minute / second” and requests data output. The time information specified by the computer 300 is time information based on the second time information. On the other hand, the first time information added to the data stored in the data storage unit 126 is time information in which an error occurs at a predetermined rate with respect to the second time information. By calculating the error between the first time information and the second time information at the time designated by the computer 300, it is possible to search for data to which the first time information considering the error is added. .

  Here, based on FIGS. 4 and 5, a method of calculating the time error by the output request time error calculation unit 128 and the specified time error calculation unit 132 will be described. FIG. 4 is an explanatory diagram for explaining a time error calculation method. Point A in FIG. 4 is the time when the previous time correction was performed, that is, the time when the first time information was corrected before the time when the computer 300 requested data output. Point B is the time when data output is requested by the computer 300, that is, the time when the information processing apparatus 100 and the computer 300 are connected via a network. Point C is the time when the data designated by the computer 300 is stored.

(1) is the time from the time (point A) when the previous time correction was made to the time (point B) when the data output was requested. (2) is the amount of time deviation when a data output request is made, and is an error between the first time information and the second time information when the data output request is made. The output request time error calculation unit 128 calculates the error of (2). (3) is the time from the time when the previous time correction was performed (point A) to the time when the designated data was stored. (4) is the amount of time deviation when the specified data is stored, and the specified time error calculation unit 132 calculates the error of (4). The method for calculating the error in (4) is as follows. Assuming that the error of the first time information with respect to the second time information increases linearly, the specified time error (4) is obtained by proportionally calculating the ratio of (3) and (1) to (2). Specifically, (4) is calculated by the following formula 1.
(4) = (2) × (3) ÷ (1) (Formula 1)

  For example, it is assumed that the specified time error of the specified time is calculated by Equation 1 as +1 minute. The specified time error calculation unit 132 provides the data output unit 130 that the specified time and the specified time error are +1 minute.

  The data output unit 130 has a function of outputting data to which the first time information corresponding to the specified time error calculated by the specified time error calculating unit 132 is added to the computer 300. For example, when the data output unit 130 is provided with information of the specified time 0:11:00 and the specified time error +1 minute from the specified time error calculator 132, as shown in FIG. The data at 0:12:00, which is +1 minute apart from 11:00, is acquired from the data storage unit 126, and the acquired data is output to the computer 300.

  The time information correction unit 124 has a function of correcting the first time information to the second time information. By correcting the first time information to the second time information, the time information of the built-in clock of the information processing apparatus 100 can be made accurate time information.

  The functional configuration of the information processing apparatus 100 has been described above. According to the information processing apparatus 100, when the input data is stored, the time information of the built-in clock provided in the information processing apparatus 100 is given, and based on the time information given to the data when the computer 300 requests the data. Thus, the data designated to the computer 300 can be output correctly. Thus, the information processing apparatus 100 can always connect to the network and output correct data without correcting its own time information. Further, when connected to the computer 300, the time information of the built-in clock can be made accurate because the time information of itself is corrected.

  Next, based on FIG. 6, the correction process of the 1st time information by the information processing apparatus 100 is demonstrated. FIG. 6 is a timing chart showing the flow of processing until the time information of the data input to the information processing apparatus 100 is corrected and output.

  First, the information processing apparatus 100 is connected to the computer 300, and the first time information that is the time information of the internal clock of the information processing apparatus 100 is corrected to the second time information of the computer 300 (S102). Time information at the time of correction in step S102 is stored in the time correction unit 108 (S103).

  Photographing is performed by the data generator 200 (S104). The video data shot in step S104 is transmitted to the information processing apparatus 100 and provided to the encoding processing unit 106 provided in the information processing apparatus 100 (S106).

  The encoding processing unit 106 provided with the video data in step S106 encodes the video data using a compression technique such as MPEG-4 (S108). When the encoding process is performed in step S108, the time information at the time when the image is taken by the data generator 200 is transmitted from the RTC 104 to the encoding processing unit 106 (S110). The encoding processing unit 106 adds the time information transmitted in step S110 to the data encoded in step S108. Here, when the encoded data is divided, time information is assigned to each divided data. As described above, the time information given to the encoded data may be used as the data file name. Each data can be identified by using the time information given to each divided data as a file name.

  Then, storage data for temporarily storing the encoded data to which the time information is added in step S108 in the encoding processing unit 106 is created (S114).

  The encoding processing unit 106 that created the saved data in step S114 transmits the created saved data to the storage device 110 (S116). The storage device 110 to which the save data is transmitted in step S116 saves the plurality of divided files so that they can be searched by the file name that is time information (S120). When data is stored in the storage device 110 in step S120, time information may be transmitted from the RTC 104 and attached to each data. The file name of the data stored in the storage device 110 is the time information transmitted in step S110, and the time information transmitted in step S118 is added to the data having the time information as the file name.

  The computer 300 is connected to the information processing apparatus 100 and transmits time information (search target time) of desired video data from the input device of the computer 300 (S122). For example, “Request video data of 1 hour and 30 minutes from 00:00 40:00 on June 20” is input. The time information (second time information) of the internal clock of the computer 300 that has been corrected to an accurate time in advance is transmitted to the time correction unit 108 of the information processing apparatus 100 (S124).

  The time correction unit 108 compares the second time information, which is the accurate time transmitted in step S124, with the first time information, which is the time information of the internal clock of the information processing apparatus 100, and compares the first time information with the first time information. An error from one time information is calculated. Then, the error of the time information of the designated data transmitted in step S122 is calculated by the above calculation formula 1 (S126).

  Time information for acquiring the video data at the search target time in consideration of the error calculated in step S126 is transmitted to the storage device 110 (S128). As described above, when the file name of the video data is time information, the file name is transmitted to the storage device 110. For example, if the search target time is 0:11:00 and the calculated error is +1 minute, the time information of 0:12:00 is transmitted to the storage device. The video data to which the time information specified in step S128 is assigned is transmitted from the storage device 110 to the computer 300 (S130).

  Next, the 2nd time information which is the exact time information acquired in Step S124 is transmitted to RTC104 (S132). Based on the second time information transmitted in step S132, the first time information, which is the time information of the RTC 104, is corrected (S134). Information on the date and time when the time information of the RTC 104 was corrected in step S134 is stored by the time correction unit 108 (S136).

  In this embodiment, after transmitting the data designated by the computer 300 in step S130, the first time information that is the time information of the internal clock of the information processing apparatus 100 is corrected in step S134. As described above, before the first time information is corrected, the data designated by the computer 300 is transmitted, so that the data to which the time information after the first time information correction is added is erroneously output. It can be avoided. In addition, the information at the time when the time information is corrected in step S136 may be stored so that the time information designated by the computer 300 is from the time when it was corrected last time to the time when it was corrected this time.

  The flow of processing until the time information of the data input to the information processing apparatus 100 is corrected and output has been described above. Next, data storage processing of the information processing apparatus 100 will be described with reference to FIG. FIG. 7 is a flowchart showing data storage processing of the information processing apparatus 100.

  The information processing apparatus 100 acquires the data input by the data generation apparatus 200 (S202). And 1st time information is provided to the data acquired in step S202 (S204). The data to which the first time information is assigned in step S204 is stored in the data storage unit 126 (S206). The data storage process of the information processing apparatus 100 has been described above. Next, the time information correction process of the information processing apparatus 100 will be described with reference to FIG.

  FIG. 8 is a flowchart showing time information correction processing of the information processing apparatus 100. First, a data output request is received from the computer 300 (S212). Next, second time information is acquired from the computer 300 (S214). An output request time error between the second time information and the first time information at the data output request time received in step S212 is calculated (S216). Based on the output request time error calculated in step S216, the specified time error between the first time information and the second time information specified by the computer 300 is calculated (S218).

  Video data to which the first time information corresponding to the specified time error calculated in step S218 is added is acquired from the data storage unit 126 and output to the computer 300 (S220). Then, the time information (first time information) of the internal clock of the information processing apparatus 100 is corrected to the time information (second time information) of the internal clock of the computer 300. The time information correction process of the information processing apparatus 100 has been described above.

  According to the information processing apparatus 100 according to the present embodiment, the time information of the built-in clock provided in the information processing apparatus 100 is given when the input data is stored, and is given to the data when the computer 300 requests the data. Based on the time information, the data designated to the computer 300 can be output correctly. Thus, the information processing apparatus 100 can always connect to the network and output correct data without correcting its own time information. Further, when connected to the computer 300, the time information of the built-in clock can be made accurate because the time information of itself is corrected.

  As mentioned above, although preferred embodiment of this invention was described referring an accompanying drawing, it cannot be overemphasized that this invention is not limited to the example which concerns. It will be apparent to those skilled in the art that various changes and modifications can be made within the scope of the claims, and these are naturally within the technical scope of the present invention. Understood.

  In the above embodiment, the data at the specified time point is output to the computer 300. However, the present invention is not limited to this example, and all data at the time point connected to the computer 300 from the previously corrected time point is output to the computer 300. May be output. For example, the first time information of all data at the time of connection to the computer 300 from the time of the previous correction is corrected using the above formula (1), and the data is output to the computer 300. Also good.

  The present invention can be applied to an information processing apparatus that corrects an error in time information given to data input from an external apparatus and outputs correct data, and particularly, for information recorded on captured images and sounds. Therefore, the present invention can be applied to an information processing apparatus that outputs information corresponding to a specified shooting time based on an error in time information at the time of recording.

It is a block diagram which shows the structure of the information processing apparatus concerning embodiment of this invention. It is a block diagram which shows the function structure of the information processing apparatus in the embodiment. It is explanatory drawing explaining the provision method of the time information in the embodiment. It is explanatory drawing explaining the time error calculation method in the embodiment. It is explanatory drawing explaining the acquisition method of the data in the embodiment. 4 is a timing chart showing a flow of processing from correction of time information of data to output of data by the information processing apparatus in the embodiment. It is a flowchart which shows the data storage process of the information processing apparatus in the embodiment. It is a flowchart which shows the time information correction process of the information processing apparatus in the embodiment.

Explanation of symbols

100 Information processing apparatus 102 CPU
104 RTC
106 Encoding Processing Unit 108 Time Correction Unit 110 Storage Device 112 Network I / F
DESCRIPTION OF SYMBOLS 120 1st time information provision part 122 2nd time information acquisition part 124 Time information correction | amendment part 126 Data storage part 128 Output request | requirement time error calculation part 130 Data output part 132 Designated time error calculation part 200 Data generator 300 Computer

Claims (8)

An information processing apparatus that outputs data input from a first external device to a second external device:
A first time information giving unit for giving first time information to data inputted from the first external device;
A second time information acquisition unit for acquiring second time information serving as a reference at the time of data output request in response to a data output request from the second external device;
An output request time error calculation unit for calculating an output request time error between the first time information and the second time information at the time of the data output request;
A designated time error calculation unit for calculating a designated time error between the first time information and the second time information at a time designated by the second external device based on the output request time error;
A data output unit that outputs data to which the first time information corresponding to the specified time error is added to the second external device;
An information processing apparatus comprising: The first time information adding unit
The information processing apparatus according to claim 1, wherein data input from the first external device is divided at predetermined time intervals, and the first time information is assigned to each data. A time information correction unit that corrects the first time information to the second time information;
The information processing apparatus according to claim 1, wherein the time information correction unit holds time information at a time when the first time information is corrected to the second time information. A data storage unit for storing data to which the first time information is given by the first time information giving unit;
The data output unit is:
The data to which the first time information corresponding to the specified time error is acquired from the data stored in the data storage unit, and is output to the second external device. The information processing apparatus described. The second time information is time information obtained by the second external device accessing a time server,
The first time information is time information in which an error occurs at a predetermined ratio with respect to the second time information from the time when the time information correction unit corrects the second time information. The information processing apparatus according to claim 1. The specified time error calculation unit
The time from the correction time point when the first time information is corrected to the second time information to the data output request time point from the second external device, and the specified time specified by the second external device from the correction time point 2. The information processing according to claim 1, wherein the specified time error is calculated by performing a proportional operation on the ratio of the time until the output request time error calculated by the output request time error calculation unit. apparatus. An information processing device that outputs data input from the first external device to the second external device,
A process of adding first time information to data input from the first external device;
Processing for obtaining second time information serving as a reference at the time of data output request in response to a data output request from the second external device;
Processing for calculating an output request time error between the first time information and the second time information at the time of the data output request;
Processing for calculating a designated time error between the first time information and the second time information at a time designated by the second external device based on the output request time error;
Processing for outputting data to which the first time information corresponding to the specified time error is added to the second external device;
A computer program characterized in that it is executed. An information processing method for outputting data input from a first external device to a second external device, wherein:
Adding first time information to data input from the first external device;
Obtaining second time information as a reference at the time of data output request in response to a data output request from the second external device;
Calculating an output request time error between the first time information and the second time information at the data output request time;
Calculating a designated time error between the first time information and the second time information at a time designated by the second external device based on the output request time error;
Outputting data to which the first time information corresponding to the specified time error is added to the second external device;
An information processing method characterized by including:

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