Data recording apparatus, data recording method, and non-transitory computer readable medium
A data recording apparatus, including: a data obtaining section for obtaining multiple sets of measurement data obtained by measuring a measurement target; a determining section for determining for every measurement data of the multiple sets of measurement data whether a data volume is reducible; a data volume reducing section for reducing, in response to a result of the determining, a data volume for measurement data of which data volume has been determined as being reducible; a data compressing section for compressing multiple sets of measurement data including the measurement data of which data volume has been reduced; and a data recording section for recording the multiple sets of measurement data which have been compressed, is provided.
1 . A data recording apparatus, comprising:
a data obtaining section for obtaining multiple sets of measurement data obtained by measuring a measurement target;
a determining section for determining for every measurement data of the multiple sets of measurement data whether a data volume is capable of being irreversibly compressed;
an irreversible data volume reducing section for irreversibly compressing, in response to a result of the determining, the data volume for measurement data of which data volume has been determined as being capable of being irreversibly compressed;
a reversible data compressing section for reversibly compressing multiple sets of measurement data including the measurement data of which the data volume has been irreversibly compressed; and
a data recording section for recording the multiple sets of measurement data which have been irreversibly compressed and reversibly compressed.
2 . The data recording apparatus according to claim 1 , further comprising
an assigning section for assigning identification information representing whether the data volume is capable of being irreversibly compressed to every measurement data of the multiple sets of measurement data, wherein
the determining section is configured to determine for every measurement data whether the data volume is capable of being irreversibly compressed in accordance with the identification information.
3 . The data recording apparatus according to claim 2 , wherein the assigning section is configured to assign the identification information to every measurement data in response to a user input.
4 . The data recording apparatus according to claim 2 , further comprising
a trigger judging section for judging if there is a trigger for starting irreversible data volume reduction processing on the multiple sets of measurement data.
5 . The data recording apparatus according to claim 2 , wherein the irreversible data volume reducing section is configured to irreversibly compress at least one of a number of at least one sample per unit time or a data size per piece of data, for measurement data of which the data volume has been determined as capable of being irreversibly compressed.
6 . The data recording apparatus according to claim 1 , wherein the determining section is configured to determine for every measurement data whether the data volume is capable of being irreversibly compressed based on time at which the measurement target is measured.
7 . The data recording apparatus according to claim 1 , wherein the determining section is configured to determine for every measurement data whether the data volume is capable of being irreversibly compressed based on a changed amount in time series.
8 . The data recording apparatus according to claim 1 , wherein the determining section is configured to determine for every measurement data whether the data volume is capable of being irreversibly compressed based on a prediction error obtained by predicting target measurement data by using another measurement data.
9 . The data recording apparatus according to claim 1 , further comprising
a trigger judging section for judging if there is a trigger for starting irreversible data volume reduction processing on the multiple sets of measurement data.
10 . The data recording apparatus according to claim 9 , wherein the trigger is set in response to an instruction from an outside.
11 . The data recording apparatus according to claim 9 , wherein the trigger is set in response to a fact that a predetermined time has passed.
12 . The data recording apparatus according to claim 9 , wherein the trigger is set in response to a fact that a remaining recordable capacity does not satisfy a predetermined criteria.
13 . The data recording apparatus according to claim 1 , wherein the irreversible data volume reducing section is configured to irreversibly compress at least one of a number of at least one sample per unit time or a data size per piece of data, for measurement data of which the data volume has been determined as capable of being irreversibly compressed.
14 . The data recording apparatus according to claim 1 , further comprising
a notifying section for providing an alert notice when there is no measurement data of which the data volume is capable of being irreversibly compressed.
15 . The data recording apparatus according to claim 1 , further comprising
a data transmitting section for transmitting transmission target measurement data among the multiple sets of measurement data to another apparatus.
16 . The data recording apparatus according to claim 15 , wherein the determining section is configured to determine for every measurement data whether the data volume is capable of being irreversibly compressed based on a transmission history of transmission to the another apparatus.
17 . A data recording method executed by a computer, comprising the computer to perform operations including:
obtaining multiple sets of measurement data obtained by measuring a measurement target;
determining for every measurement data of the multiple sets of measurement data whether a data volume is capable of being irreversibly compressed;
irreversibly compressing, in response to a result of the determining, the data volume for measurement data of which the data volume has been determined as capable of being irreversibly compressed;
reversibly compressing multiple sets of measurement data including the measurement data of which the data volume has been irreversibly compressed; and
recording the multiple sets of measurement data which have been irreversibly compressed and reversibly compressed.
18 . A non-transitory computer readable medium having recorded thereon a data recording program that, when executed by a computer, causes the computer to function as:
a data obtaining section for obtaining multiple sets of measurement data obtained by measuring a measurement target;
a determining section for determining for every measurement data of the multiple sets of measurement data whether a data volume is capable of being irreversibly compressed;
an irreversible data volume reducing section for irreversibly compressing, in response to a result of the determining, the data volume for measurement data of which the data volume has been determined as capable of being irreversibly compressed;
a reversible data compressing section for reversibly compressing multiple sets of measurement data including the measurement data of which the data volume has been irreversibly compressed; and
a data recording section for recording the multiple sets of measurement data which have been irreversibly compressed and reversibly compressed.