JPH08223254A - Compression storage device and expansion reproduction device for collected event - Google Patents

Abstract

PURPOSE: To simply specify a change in event stored later and a change occurrence time when data of sequential events are compressed and stores and to save the capacity of a storage section. CONSTITUTION: The device is provided with an event change detection section 2 detecting an event change representing a change of each event received sequentially on time base with respect to a reference event, a time stamp generating section 5 generating a time stamp TS specifying an input time of each event received sequentially, a storage section 4 storing the time stamp TS, and a write control section 3 receiving an event change detection of the event change detection section 2 and writing the time stamp TS in the storage section 4 when the event change is detected.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a collection event compression storage device for detecting changes in respective events sequentially collected in time series with respect to a reference event, compressing and storing the data, and a compressed data storage device. The present invention relates to a decompressing / reproducing device for a collected event that decompresses an event stored in a storage unit and outputs the decompressed event as each original event.

[0002]

2. Description of the Related Art For example, in a test device for testing whether or not various electronic devices are operating normally, various data output from a device under test are monitored and the data value is set to a predetermined reference value. If it goes out of the range, it is judged that an abnormality has occurred.

In this case, in order to grasp the frequency of occurrence of abnormality, even if an abnormality occurs, the device under test may be operated as it is without stopping. And when it is necessary to carry out the test for a long period of time like various communication equipment, data is taken from the device under test at a fixed sampling cycle to detect the occurrence of an abnormality in the data at each sampling time and the corresponding time. Presence / absence information is once written in a storage device in time series.

Then, at a later date, each time (time stamp) written in the storage device at a constant time interval such as 0.1 second, 1 second, 1 minute, 1 hour, etc. The presence / absence information is read in order, and a predetermined abnormality analysis such as statistical processing of abnormality occurrence and trend grasp of abnormality occurrence time is performed.

However, when the device under test is, for example, a communication device, the measurement time is often long. Also,
The probability of anomalies is very small. In order to accurately perform the abnormality analysis, it is necessary to collect and store a huge amount of data. Therefore, the required storage capacity of the storage device is significantly increased.

In order to eliminate such inconvenience, for example, in the logic analyzer described in Japanese Utility Model Application Laid-Open No. 4-87476, the measurement data of this time is different from the measurement data of the last time in the measurement data obtained sequentially. If there is a change, the mismatch status is added to the measurement data and stored in the storage device. Also,
If there is no change from the previous measurement data, the same measurement data is added to the previous measurement data and stored. Therefore, the storage device stores the number of consecutive measurement data that has changed from the previous measurement data and the measurement data that has not changed. Therefore, at a later date,
All the original measurement data can be reproduced from the storage data of this storage device.

[0007]

However, even in the measurement data storage method described in Japanese Utility Model Laid-Open No. 4-87476, there are still the following problems to be solved. That is, in each area of the storage device, the measurement data with the mismatch status when the measurement value changed from the previous value and the measurement with the number of consecutive matches when the measurement value did not change from the previous value Data and are recorded.

Therefore, in order to reproduce all the original measurement data from the measurement data stored in the storage device, in the process of sequentially reading each measurement data stored in each region of the storage device, the read measurement data is read. If the data has a match status, the measurement data is output as it is.If the read measurement data has a number of consecutive matches that does not change, the read measurement data is continuously read for the number of consecutive matches. Output.

However, in such a method, in order to read out arbitrary measurement data stored in the storage device and specify at what time the corresponding measurement data is the measurement data generated, It is necessary to sequentially read all the measurement data stored in the previous area and sequentially add the number of mismatch statuses and the number of consecutive matches.

Therefore, there is a problem that the generation time of arbitrary measurement data stored in the storage device cannot be easily specified. For example, of the huge amount of measurement data stored in the storage device,
It is difficult to extract only the measurement data belonging to a certain specific time zone and reproduce all the measured data in this specific time zone.

The present invention has been made in view of the above circumstances, and when an event change in which an input event changes with respect to a reference event or a change in this event change is detected, this change is detected. By storing and holding the time stamp indicating the occurrence time and event change, the storage capacity required by the storage device can be significantly reduced and the occurrence time of any event stored in the storage device can be easily specified. It is an object of the present invention to provide a compression recording device and a decompression reproducing device for collected events.

[0012]

In order to solve the above problems, in the compression recording apparatus for collecting events according to claim 1 of the present invention, the change from the reference event among the events sequentially input in time series is performed. An event change detection unit that detects an event change shown, a time stamp generation unit that generates a time stamp that specifies the input time of each event that is sequentially input, a storage unit that stores the time stamp, and an event change detection unit In response to the event change detection signal, the writing control unit writes the time stamp at the time of detecting the event change in the storage unit.

According to another aspect of the present invention, there is provided an event change detection unit for detecting an event change indicating a change with respect to a reference event among the events sequentially input in time series, and the event change detection unit sequentially input. A time stamp generating unit that generates a time stamp that specifies the input time of each event, and a storage unit that stores the time stamp and event change,
The event change detection unit detects a change in each event change and includes a writing control unit that writes a time stamp and an event change signal in the storage unit when the change in the event change is detected.

Further, in the apparatus for expanding and reproducing collected events according to claim 3, a storage unit storing a time stamp for specifying an occurrence time of an event change with respect to a reference event of each event sequentially occurring in time series; The reading control means for sequentially reading the time stamps stored in the unit, the time stamp sequence creating means for creating the time stamp sequence for specifying the occurrence time of the events which occur sequentially in time series, and the time stamp sequence for the created time stamp sequence By assigning an event change to a time stamp that matches each read time stamp,
And an event generating means for sequentially outputting an event change signal corresponding to each time stamp of the created time stamp sequence.

According to a fourth aspect of the present invention, in the decompressing / reproducing apparatus for collected events, each event that occurs sequentially in time series specifies a time stamp of occurrence of a change of the event change with respect to the reference event and a time stamp before the change time of the event change. A storage unit that stores event changes of events, a read control unit that sequentially reads each time stamp and change of each event change stored in the storage unit, and specifies the occurrence time of events that occur sequentially in time series. The time stamp sequence creating means for creating the time stamp sequence and the time stamps previously read from the time stamps existing between the time stamps corresponding to the respective time stamps read in the created time stamp sequence By assigning the event change of, the event change signal corresponding to each time stamp of the created time stamp sequence is sequentially output. It is obtained by a elephant generating means.

Further, in the invention of claim 5, in the invention of claim 3 or 4, the time stamp reproduction in which each time stamp corresponding to the event change sequentially output by the event generating means is added. Means are added.

[0017]

In the compression storage device for collecting events according to the first aspect of the present invention, the time stamp is generated in synchronization with the occurrence of each event that is sequentially input in time series. The event change detection unit detects an event change of each event sequentially input in time series with respect to the reference event. Then, the time stamp when the event change is detected is written in the storage unit.
The event change indicates that the input event does not match the reference event.

As described above, only the time stamp for specifying the occurrence time when the event change occurs is stored in the storage unit. Therefore, by reading each time stamp stored in this storage unit, it is possible to specify the change occurrence time of the event, so that the time stamp of the event in which no change has occurred, that is, the event that matches the reference event is stored. Therefore, the required storage capacity can be reduced. Further, the time when the mismatch occurs in the event of the mismatch can be immediately read.

Further, in the decompression / reproduction device for collected events according to claim 3, in the storage unit, only the time stamp indicating the occurrence time of the event that has changed with respect to the reference event is stored in the storage unit. Has been done.

When a time stamp sequence including all time stamps is created, the event corresponding to the time stamp stored in the storage unit in this time stamp sequence does not match the reference event, and the created event is generated. It can be determined that the event corresponding to the time stamp not stored in the storage unit in the generated time stamp sequence matches the reference event.

The event change of each event corresponding to each time stamp of the generated time stamp sequence, that is, coincidence or non-coincidence is specified, and this event change is sequentially output according to the time stamp sequence.

In the compressed storage device for collecting events according to claim 2, a time stamp is generated in synchronization with the occurrence of each event that is sequentially input in time series, similarly to the compression storage device according to claim 1. It The event change detection unit detects an event change of each event that occurs sequentially in time series with respect to the reference event.

The write controller detects a change in the event change output from the event change detector. There are two types of changes in the event change, for example, a case where the event changes from a coincidence to the reference event and a disagreement, and a case where the event changes from the disagreement to the reference event to a coincidence. And
The time stamp of the change occurrence time of the event change and the event change of the event at the time of occurrence are written in the storage unit.

In such a storage method, when one time stamp in the storage unit and a coincidence or non-coincidence event change in the corresponding time stamp are specified, they exist before the time stamp stored next to this time stamp. The event change of the event corresponding to each time stamp is the same as the event change corresponding to the previous time stamp.

As described above, the event change of the event corresponding to the time stamp not stored in the storage unit with respect to the reference event can be interpolated by the event change of the time stamp stored immediately before.

Therefore, when the same event change continues, the storage capacity required by the storage unit can be saved by omitting the storage of this event change. In the decompressing / reproducing device for collected events according to claim 4, the time stamp of the change time of the event change and the coincidence or non-coincidence of the events at the change time of the event change are stored in the storage unit. .

When a time stamp sequence including all time stamps is created, the coincidence or non-coincidence of the event with the time stamp stored in the storage unit in the time stamp sequence is preceded by this time stamp. It can be judged to be the same as the event change of the coincidence or non-coincidence of the stored time stamps.

The event change of each event corresponding to each time stamp of the generated time stamp sequence is specified, and each coincident or non-coincident event change is output in order according to the time stamp sequence. Further, in claim 5, a time stamp for specifying the occurrence time is attached to each event change of each output event.

[0029]

Embodiments of the present invention will be described below with reference to the drawings. (First Embodiment) FIG. 1 is a block diagram showing the schematic arrangement of a compressed storage device for collecting events according to the first embodiment.

Received data D as an event, which is input from the input terminal 1 in time series at a constant cycle T ₀ , for example, is input to an error detection unit 2 as an event change detection unit. Further, the reference data D _R as the reference event is input to the error detection unit 2 from the input terminal 1a. The error detection unit 2 reads the value of the reception data D input at a constant cycle T ₀ , detects whether the reception data D is outside the allowable range or the warning range of the reference value D _R , and when it is out of the range. Is regarded as a mismatch, and the error E is applied to the upper bit terminals of the data input terminals of the next write control unit 3 and storage unit 4. The error E as the event change is, for example, 1-bit data having a period T ₀ width. The case [1] does not match the reference value (reference event), and the case [0] matches the reference value (reference event).

The time stamp generator 5 has, for example, a built-in clock circuit, and in synchronization with the cycle T ₀ of the received data D, the current time is read from the clock circuit every time this time T ₀ elapses, This time is applied to the lower bit terminal of the data input terminal of the storage unit 4 as the time stamp TS.
This time stamp TS is indicated by, for example, the elapsed time from the designated time.

The time stamp TS is, for example, date. Time. Minutes. In some cases, the actual time itself, such as seconds, 1 / 10.10.1 / 1000000 seconds, is used. In the storage unit 4, as shown in FIG. 2, a plurality of areas 6 with area numbers P (memory order) are attached.
Are formed. In each area 6, a time stamp T
S and error E are stored in the order of area number P. In the error E, [1] indicates that an error has occurred and [0] indicates that no error has occurred.

Further, the measurement start command a or the measurement stop command b input from the outside through the control terminal 7 is sent to the writing control section 3.
Is applied to. When the measurement start command a or the measurement stop command b is input, the writing control unit 3 writes the writing command c to the storage unit 4.
Is sent. Further, the write control unit 3 generates an error (E = E) from the error detection unit 2 during the measurement period from the input of the measurement start command a to the input of the measurement stop command b.
When 1) is input, the write command c is also sent to the storage unit 4.

The storage unit 4 receives the write command c from the write control unit 3.
Each time a signal is input, the error E applied to the upper bit terminal and the lower bit terminal of the data input terminal at that time is input.
And error information (TS,
E) is taken in and sequentially written in each area 6 as shown in FIG.

For example, as shown in FIG. 3, the measurement start command a is input at the time stamp TS = 0, and an error (E) occurs in the measurement data D at the time stamp TS = 15.
= 1) occurs and the measurement stop command b is input at the time stamp TS = 25. In this case, the area number (memory order) P =
1, time stamp TS = 0, error E = 0 is written, and area number P = 2, time stamp TS = 15, error E = 1 is written in the second area 6. Then, in the third area 6, the storage order P = 3, the time stamp TS = 2
5, Error E = 0 is written.

Further, a decompression reproducing unit 8 as a decompression reproducing device is added to the compression storage device of the first embodiment. The extension reproducing unit 8 receives a reproduction command d from the control terminal 10.
Is applied, the time stamp TS and the error E stored in the storage unit 4 in a data-compressed state are read out, and an error including [0] or [1] sequentially output from the error detection unit 2 is read. Play E column and play error E
Each error E in the column is sequentially output to the output terminal 9 at the cycle T ₀ of the time stamp TS.

When the reproduction command d is applied, the decompression reproducing section 8 executes the above-mentioned reproducing processing according to the flow chart shown in FIG. 4, for example. When the flow chart starts, in ST (program step) 1, the area number P _E of the final area 6 in which the error information (TS, E) stored in the storage unit 4 is stored is read. Next, in ST2, the area number P for specifying the area 6 to be read in the storage unit 4 is initialized to 1 (P = 1). Further, in ST3, the restoration order R of [time stamp TS and error E] shown in FIG. 5 is initialized (R = 1).

In ST4, the error information (TS, E) stored in the area 6 indicated by the area number P of the storage unit 4 is read. Then, in ST5, if the time stamp TS of the error information is smaller than the restoration order R by one, (T
S = R-1), it is determined that the order of outputting the error information (TS, E) read this time has come, and the process proceeds to ST10.
The restoration order R and the read error information (TS, E) are output as reproduction error information (TS, E).

When the output process for one reproduction error information (TS, E) is completed, the restoration order R is updated by 1 (S
Then, the area number P is updated by 1 (T11) (ST
12). Area number P after update is error information (TS.E)
If it does not exceed the area number P _E that specifies the final area 6 in which is recorded (ST13), the process returns to ST4 and the error information (TS.E) of the area 6 specified by the updated area number P
Read out.

If the time stamp TS is greater than or equal to the restoration order R in ST5, the error information (T
S. It is determined that the restoration order R for outputting E) has not yet been reached. Then, the interpolation processing of the error information after ST6 is executed.

First, in ST6, the reproduction time stamp TSR to be reproduced is changed to the time stamp TS corresponding to the restoration order R after updating (TSR = R-1). Since no error naturally occurs in this restoration order R, a reproduction error E _R (= 0) of [0] is created (ST
7). Then, the reproduction error E _R (= 0) and the changed time stamp TSR are set as reproduction error information (TSR, E _R )
Is output (ST8).

[0042] One of the reproduction error information (TSR, E _R) When the output is finished, only 1 to restore order R at ST9 to update (R = R + 1). Then, returning to ST5, if the value obtained by subtracting 1 from the updated restoration order R is less than the time stamp TS, the process proceeds to ST5, and the error information interpolation processing for the updated restoration order R is executed.

Then, in ST5, when the value obtained by subtracting 1 from the updated restoration order R becomes equal to the time stamp TS, interpolation processing of error information for the time stamp TS not stored in the storage area 6 of the storage unit 4 is performed. Is completed, the process proceeds to ST10, where the error information (TS, E) read from the area 6 of the area number P is reproduced error information (T
Output as S, E).

[0044] Incidentally, ST8, ST10 in (TS, E) or interval output (TSR, E _R) for each reproduction error information is periodic T ₀ determined by the time stamp TS. In the compression storage device configured as described above, an error occurs at the time stamp TS = 15 as shown in FIG. 3 (E =
1), when the measurement stop command b is input with the time stamp TS = 25, the three areas 6 (P = 1, P = 2, P = 3) of the storage unit 4 are shown in FIG. 2 as described above. Each error information (TS, E) shown is written.

Then, when the reproduction command d is input from the control terminal 10 in a state in which the error information (TS, E) is written in each area 6 as described above, the output terminal 9 is supplied to the output terminal 9 in the order shown in FIG. each reproduction error information _(R, TSR, E R) is output. Therefore, all the error information {(TS,
E) or (TSR, E _R )} is accurately reproduced.

In the apparatus of this embodiment, the storage unit 4 stores each error information (TS.E) at the measurement start time (TS = 0) and the measurement stop time (TS = 25).
Only error information (TS.E = 1) at the time of error occurrence (E = 1) during the measurement period is stored.

Therefore, when the received data D during the measurement period maintains the normal value, the error information (TS,
Since E) is not stored, the storage capacity required by the storage unit 4 can be greatly reduced.

Further, in each area 6 of the storage unit 4, in addition to the error occurrence information (E = 1), the occurrence time of the corresponding error is directly specified by the time stamp TS included in this error information (TS.E). it can. Therefore, even if the data is compressed and the error occurrence information (E = 1) is stored, each error occurrence time can be independently specified independently.

Further, for example, a time stamp TS is designated, and reproduction error information (TSR, E
It is also possible to output _R ) sequentially. Further, in the apparatus of the embodiment shown in FIG. 1, the storage unit 4 includes the write control unit 3
Each time the write command c is input from the device, the error information (TS, E) including the error E and the time stamp TS applied to the upper bit terminal and the lower bit terminal of the data input terminal at that time is fetched. , The areas 6 are sequentially written. For example, every time a write command c is input from the write controller 3, it is applied to the lower bit terminal of the data input terminal at that time. It is also possible to write only the time stamp TS in each area 6.

In this case, the storage unit 4 stores an error E at the start of measurement, at the end of measurement and when the received data D does not match the reference value.
(= 1) Only each time stamp TS that specifies the occurrence time is stored, and the bit of the error E indicating the event change is not recorded at all. Even in such a case, the start time stamp (= measurement start time stamp + T0) and the end time stamp (= measurement stop time stamp−T0) are set from each time stamp TS stored in the storage unit 4. The occurrence status of the error E of each received data D can be accurately grasped. Further, if the error occurrence information is stored only when the measurement is started and when the measurement is stopped, all the information can be grasped. Therefore, these methods can further reduce the required storage capacity of the storage unit 4.

When the reproduction command d is applied from the control terminal 10 to the decompression reproducing unit 8 from the time stamp TS of the storage unit 4 which stores only the time stamp TS when the error occurs (E = 1). , The time stamp T stored in the storage unit 4 in a data compressed state
S is read, the error E sequence including the original [0] or [1] sequentially output from the error detection unit 2 is reproduced, and each error E in the reproduced error E sequence is reproduced as the cycle T of the time stamp TS. _{When it is 0} , the data is sequentially output to the output terminal 9.

Specifically, in ST4 of the flow chart of FIG.
The time stamp TS is read instead of the error information (TS, E), and the read time stamp TS is read in ST5.
Is not equal to the restoration order R-1, a time stamp TSR corresponding to the restoration order R-1 is created, and there is no error in this time stamp TSR (E = 0; coincides with the reference position).
Is assigned and output. In ST5, when the read time stamp TS is equal to the restoration order R-1, there is an error in the read time stamp TS (E
= 1: disagree with reference position) is assigned and output. Also in this case, the processing of the error information at the time of starting the measurement and at the time of stopping the measurement is performed in the same manner as described above.

Further, in the apparatus of the embodiment, the time stamp sequence is added to the reproduced error sequence E, but this time stamp sequence may be removed and only the error sequence E may be output.

(Second Embodiment) FIG. 6 is a block diagram showing the schematic arrangement of a compressed storage device for collecting events according to the second embodiment. The same parts as those of the first embodiment shown in FIG. 1 are designated by the same reference numerals. Therefore, detailed description of the overlapping portions will be omitted.

Error detector 2a as event change detector
The received data D as an event is input from the input terminal 1 and the reference data D _R as a reference event is input from another input terminal 1a. The error detection unit 2a determines the event change of the received data D with respect to the reference data D _R ,
When they do not match, the error E of [1] is output, and when they match, the error E of [0] is output.

The writing control unit 3a monitors the value of the error E sequentially input from the error detection unit 2a in the cycle T ₀ , and the value of the error E as the event change is the error E input immediately before.
Of the event change is detected as a change of the event change, and in synchronization with the change detection of the event change, the storage unit 4a
A write command c is sent to

In the storage section 4a, as shown in FIG. 8, a plurality of areas 6 each having an area number P (memory order) are formed. Each area 6 has an area number P and a time stamp T.
S and the error E at the time of change of the event change are stored.

Each time the write command c is input from the write controller 3, the memory 4a stores the error E and the time applied to the upper bit terminal and the lower bit terminal of the data input terminal at that time. The error information (TS, E) consisting of the stamp TS is taken in, and as shown in FIG.
Write in order.

In the compression storage device configured as described above, for example, as shown in FIG.
= Assumed in 0-9, if the value of the reference data D _R is the change in [1] or [0], the received data D having a value shown is input. In this case, the error E (mismatch) of [1] occurs at six places of the time stamp TS = 2, 3, 4, 5, 6, 7.

Then, in the storage unit 4a, the measurement start time (TS = 0) and the measurement end time (TS = 9) and the event change time (TS = 2, 8) at which the value of the error E changes.
Each time stamp TS and its time stamp T in
The error E (1 or 0) in S is sequentially written in each area 6 of the storage unit 4a in FIG.

As a result, the area number (memory order) P = 1, the time stamp TS = 0, and the error E = 0 are written in the first area 6 of the storage unit 4a, and the area number P = in the second area 6.
2, time stamp TS = 2, error E = 1 is written. Then, the storage order P = 3, the time stamp TS = 8, and the error E = 0 are written in the third area 6. The area number P = 4, the time stamp TS = 9, and the error E = 0 are written in the fourth area 6.

Further, the decompression reproducing section 8 as a decompression reproducing device
When the start command d is applied from the control terminal 10, the a reads out the time stamp TS and the error E stored in the storage unit 4a in the state shown in FIG.
The error E sequence including the original [0: match] or [1: mismatch] sequentially output from the error detection unit 2a is reproduced,
Each error E (event change) of the reproduced error E column is sequentially output to the output terminal 9 at the cycle T ₀ of the time stamp TS.

Specifically, the storage order P of each area 6 of the storage unit 4a is sequentially increased, and the time stamp TS and the error E stored in the area 6 of each storage order P are read.
Then, each time stamp T which is not stored in the storage unit 4a, which exists between the read time stamp TS and the time stamp TS of the region 6 of the immediately preceding storage order P.
S is reproduced, and the same error E as the error E stored in the area 6 of the previous storage order P is assigned to each reproduced time stamp TS.

Then, the reproduced time stamps TS and the reproduced errors E are output, and then the time stamp TS and the error E read this time are output. In the compression storage device and the decompression playback device configured as described above, the measurement data D is stored in the storage unit 4a as shown in FIG.
Events occurring in the reference data D _R (error E) is the previous event change (error E) time stamp TS of the time variation of the change of events changes with respect to the events occurring at that time only (errors E) is stored To be done. That is, even if the non-coincident event change continues, only the first event change is stored, so that the required storage capacity of the storage unit 4a can be further reduced.

FIG. 9 is a block diagram of the apparatus of the embodiment shown in FIG.
6 is a diagram showing each error information stored in the storage unit 4 when the reference data D _R and the measurement data D shown in FIG. In the apparatus of the embodiment shown in FIG. 1, all the time stamps 2, 3 at which the error E (mismatch) of [1] occurs
4, 5, 6, 7 are recorded.

By comparing and contrasting FIG. 8 and FIG. 9, in the embodiment apparatus of FIG. 6, the storage capacity can be saved when the error events occur continuously, and in the embodiment apparatus of FIG. It can be seen that storage capacity can be saved if the events occur in a distributed manner.

(Third Embodiment) FIG. 10 is a block diagram showing the schematic arrangement of a compressed storage device for collecting events according to the third embodiment of the present invention. The same parts as those of the compressed storage device of the collection event shown in FIG. 1 are denoted by the same reference numerals. Therefore, detailed description of the overlapping portions will be omitted.

In the apparatus of this embodiment, the error E output from the error detection unit 2 is delayed by two cycles T ₀ (two by the time stamp TS) in the delay unit 11, and then the data is input to the storage unit 4b. Applied to the terminals. Further, the received data D input from the input terminal 1 is input to the error detection unit 2 and also delayed by the delay unit 11 for two cycles (two for the time stamp TS), and then the data input to the storage unit 4a. Applied to the terminals.

When the error detection unit 2 outputs the error E of [1], the write control unit 3 sends a write command c to the storage unit 4b. In the storage unit 4b, as shown in FIG. 11, a plurality of regions 6a with region numbers P (memory order) are formed. The time stamp TS is set in each area 6a.
Then, the error E and the received data D are stored.

When the write command c is input from the write control section 3, the storage section 4b firstly outputs an error composed of the time stamp TS, the error E and the received data D applied to the data input terminal at that time. Information (TS, E, D) is fetched and sequentially written in each area 6a as shown in FIG.
Secondly, the next cycle T ₀ (time stamp TS +
In 1), the error information (TS, E, D) applied to the data input terminal is fetched and written in the next area 6a. Third, the next next cycle T ₀ (time stamp T
At S + 2), the error information (TS, E, D) applied to the data input terminal is fetched and further written in the next area 6a. Then, in the last fourth, next next next cycle T ₀
At (time stamp TS + 3), the error information (TS, E, D) applied to the data input terminal is fetched and further written in the next area 6a.

Thus, one error occurs (E =
1) Then, as shown in FIGS. 11 and 12, from the error information (TS, E, D) at the time point of going back two cycles (two time stamps TS) from the error occurrence time, one cycle from the error occurrence time. Up to the error information (TS, E, D) at the time point after (1 time stamp TS), a total of four pieces of error information (TS, E, D) are written in the continuous four areas 6a.

A measurement start command a and a measurement stop command b
In response to the write command c corresponding to, like the previous embodiment, only one piece of error information (TS, E, D) applied to the storage unit 4a at that time is written in the area 6a. .

For example, as shown in FIG. 12, the measurement start command a is input at the time stamp TS = -2, an error (E = 1) occurs in the measurement data D at the time stamp TS = 13, and the time stamp TS = 23
It is assumed that the measurement stop command b is input in. In this case, since the delay time of two cycles (2T ₀ .2 timestamp TS min) between the time stamp TS and the error E and the reception data D applied to the data input terminal of storage unit 4b is present, measuring The time stamp TS applied to the storage unit 4a at the time when the start command a is input is [-2] instead of [0]. In addition, at that time, the storage unit 4
The error E and the received data D input to a are ineffective because they are not valid.

Therefore, when the measurement start command a is input, as shown in FIG. 11, the time stamp TS = -2, the error E = ... (Undefined), the received data D = in the area 6a having the area number P = 1. Error information consisting of ... (undefined) is written. When the measurement stop command b is input, the area number P =
In the area of 6, the error information including the time stamp TS23, the error E = 0, and the data D23 is written.

Further, in each area 6a other than the area 6a corresponding to the first and last measurement start command a and the measurement stop command b, one error information including an error occurrence (E = 1),
Only two pieces of error information immediately before the error occurrence and one piece of error information after the error occurrence are stored, and the other time stamp TS without the error occurrence (E = 0) is not written. .

Expanding / reproducing unit 8b constituting the expanding / reproducing device
In this state, the error information (TS, E, D) written in each area 6a of the storage section 4b is sequentially read,
As shown in FIG. 13, reproduction error information (TS, E, D) is sequentially output to the output terminal 9.

The expansion reproduction processing of the expansion reproduction unit 8b is shown in FIG.
Although it is basically the same as the decompression / playback unit 8 of the previous embodiment shown in FIG. 3, the relationship between the restoration order R and the time stamp TS is TS =
The reproduction error information (R, T
S, E, D) are created.

In the compression storage device thus constructed, not only error occurrence information but also the received data D at that time are stored and reproduced as error information at the same time. Furthermore, the received data information immediately before the error occurrence and immediately after the error occurrence is also stored and reproduced at the same time.

Therefore, at a later date, the causal relationship between the error occurrence and the data can be investigated more efficiently. (Fourth Embodiment) FIG. 14 is a block diagram showing the schematic arrangement of a decompressing / reproducing apparatus for a collected event in a fourth embodiment of the present invention.

The storage unit 21 has the same structure as the storage unit 4 in the compression storage device shown in FIG. In addition, this storage unit 2
1 may be a device such as an FDD (floppy disk drive) which reads information from an FD in which each error information is written in advance in the format shown in FIG.

The error information (T
S, E) is applied to the input terminal of the data reproducing section 22.
The time stamp TS read from the storage unit 21 is applied to the time stamp comparing unit 23. The time stamp generation unit 24 sequentially outputs the time stamp TS at a constant cycle T ₀ to the next time stamp comparison unit 23 and the data reproduction unit 22.
Send to. When the time stamp TS read from the storage unit 21 matches the time stamp TS input from the time stamp generating unit 24, the time stamp comparing unit 23 issues a match command g to the read control unit 25 and the data reproducing unit 22.
Send to.

When the start command h is input from the control terminal 27, the read control unit 25 sends the read command i of the error information (TS, E) to the storage unit 21. When the coincidence command g is input from the time stamp comparison unit 23, the error information (TS, E) of the next area 6 and the read command i of the time stamp TS are sent to the storage unit 21.

The data reproducing section 22 receives the error information (T) applied to the input terminal when the coincidence command g is input.
S, E) is output to the output terminal 26 as reproduction error information (TS, E). Further, during the period when the coincidence command is not input, the data reproducing unit 22 reproduces for interpolation in which the time stamp TS sequentially input from the time stamp generating unit 24 is given an error E of no error occurrence (E = 0). The error information (TS, E = 0) is created and output.

Also in the decompressing / reproducing apparatus configured as described above, each error information which has been data-compressed and stored and held in the storage section 21 is used similarly to the decompressing / reproducing section 8 incorporated in the compression recording apparatus of FIG. As a result, it is possible to obtain time-sequential reproduction error information including information that no error has occurred (E = 0).

For example, the storage unit 21 of FIG. 14 is an FD (floppy disk), and the others are PC (personal
In the case of a computer), the error occurrence situation due to a graph or the like can be reproduced by software processing on the PC.

(Fifth Embodiment) FIG. 15 is a block diagram showing the schematic arrangement of a compressed storage device for collecting events according to the fifth embodiment of the present invention. 16 is a time chart showing each signal in the apparatus of the embodiment of FIG.

In FIG. 15, in the error detector 2, a pseudo random pattern signal (PN pattern signal) is used for the received data D input from the input terminal 1. The received data D is compared with the PN pattern signal as the reference data D _R output from the PN pattern signal generator 21a by the exclusive OR circuit 21c, and if they do not match, the error E of [1] is output. , And the error E is [0]. In addition, the clock reproduction circuit 21b
Reproduces the clock signal CK having the period T ₀ from the received data D and supplies it to the PN pattern signal generator 21a, the delay unit 11 and the time stamp generator 5.

As shown in the time chart of FIG. 16, the error E output from the error detecting section 2 is 2 in the delay section 11.
The flip-flops 11a and 11b are delayed by the period T ₀ and applied to the upper bits of the data terminal of the storage unit 4. The time stamp TS output from the time stamp generating unit 5 is applied to the lower bits of the data terminal of the storage unit 4.

Further, the error E ₂ delayed by the period T ₀ in the delay section 11 is input to the AND gate 31f via the ocade 31e in the write control section 3. And gate 3
1f is the inverted clock signal NC of the clock recovery circuit 21b
When K rises, the write command c (MEM1) is applied to the write control terminal WR of the storage unit 4 and input to the trigger terminal T of the address counter 31g.

The address counter 31g has a trigger terminal T
Each time a write command c (MEM1) is input to the storage unit 4,
Error information (E, T) applied to the address terminal AD of
The address value for specifying the writing area 6 in S) is increased.

The storage section 4 synchronizes with the rising of the write command c (MEM1) applied to the write control terminal WR.
At this time, the time stamp TS applied to the data terminal D and the error E ₂ are written in the address (area 6) applied to the address terminal AD.

Further, measurement control signals a and b (ST0) inputted from the control terminal 7 for instructing start and end of measurement.
Is the two flip-flops 3 in the write control unit 3.
1a. After being delayed by two cycles at 31b, it is input to the AND gate 31f via the exclusive OR circuit 31c and the OR gate 31e described above. The measurement control signal ST1 delayed by one cycle by the flip-flop 31a is input to the other input terminal of the exclusive OR circuit 31c. Therefore, the output signal ST3 of the exclusive OR circuit 31c is an OR gate as a write command c which rises in synchronization with the rising and falling of the measurement control signal ST1 delayed by one cycle, as shown in the time chart of FIG. Write control terminal WR of the storage unit 4 via 31e and AND gate 31f
Is applied to

Therefore, in the storage unit 4, FIG.
As shown in the time chart of FIG.
At (1) after the rise of (ST0), the time stamp TS
Error information consisting of error E ₂
At each point when the error [1] actually occurred when writing to (2)
Write error information to area 6 of the specified address in order,
When the last measurement control signals a and b (ST0) fall
Write the error information in area 6 of the specified address in (3).

After the measurement is completed, the measurement control signals a, b (ST
0), the output RST of the OR gate 31d of the write control unit 3 changes to the L level and the address counter 3
The output address value of 1g is reset to 0.

Also in the compression storage device for the collected event configured as described above, as shown in the time chart of FIG. 16, when the reception data D changes with respect to the reference data D _R , the event change (error E = 1) is written in each area 6 of the storage unit 4 together with the time stamp TS that specifies the time of occurrence, so that it is possible to obtain substantially the same effect as the above-described first embodiment apparatus shown in FIG. .

(Sixth Embodiment) FIG. 17 is a block diagram showing the schematic arrangement of a compressed storage apparatus for collecting events according to the sixth embodiment of the present invention. FIG. 18 is a time chart showing each signal in the device of the embodiment of FIG. The same parts as those of the fifth embodiment shown in FIG. 15 are designated by the same reference numerals. Therefore, detailed description of the overlapping portions is omitted.

In the apparatus of this embodiment, the error E output from the error detector 2 is delayed by two cycles T ₀ by the three flip-flops 11a, 11b, 11c connected in series in the delay unit 11. Then, the write controller 3a
The exclusive OR circuit 31h of the inner, the output signal E ₃ of the final flip-flop 11c and exclusive OR of the output signal E ₂ of the second flip-flop 11b is calculated. Therefore, the output signal E ₄ of the exclusive OR circuit 31h rises in synchronization with the rise and fall of the error E ₂ delayed by one cycle T ₀ , as shown in the time chart of FIG. The write command c (MEM1) is applied to the write control terminal WR of the storage unit 4 via the OR gate 31e and the AND gate 31f.

Therefore, in the storage unit 4, FIG.
As shown in the time chart of FIG.
At (1) after the rise of (ST0), the time stamp TS
Error information consisting of error E ₂
Write the error information to the area 6 of the address 1 at the time (2) when the error occurrence of [1] actually starts,
At the time (3) when the error of [1] is completed, the error information is written again in the area 6 of the address 2, and the error information is written at the last falling time (4) of the measurement control signals a and b (ST0). Write to area 6 at address 3.

With such a configuration, the continuous [1]
When the error E of [1] occurs, the error information of [1] at the start of occurrence and the error E of [0] at the end of occurrence are stored in the storage unit 4.
, The intermediate error E of [1] is not written in the storage unit 4 at all.

Therefore, in addition to being able to obtain substantially the same effect as the device of the second embodiment shown in FIG.
When continuous errors occur, the required storage capacity of the storage unit 4 can be further reduced as compared with the device of the fifth embodiment shown in FIG.

(Seventh Embodiment) FIG. 19 is a block diagram showing the schematic arrangement of a collected event decompression / playback apparatus according to a seventh embodiment of the present invention. 20 is a time chart showing each signal in the device of the embodiment of FIG.

The read start signal h (ST) input from the control terminal 27 is applied to the time stamp generating circuit 24 composed of a counter and the preset terminal PS of the read control unit 25. When the read start signal h (ST) rises, the time stamp generating circuit 24 sets the time in synchronization with the read clock signal CK having the cycle T ₀ input from the clock terminal 28, as shown in the time chart of FIG. The time stamp TSA shown is output. The time stamp TSA output from the time stamp generating circuit 24 at each cycle T ₀ is input to the time stamp comparing unit 23 and the data reproducing unit 22.

Further, the read control unit 25 causes the read start signal h
When (ST) rises, the initial address of [0] (CNT
B = 0) is applied to the address terminal AD of the storage unit 21.
The storage unit 21 has the same configuration as the storage unit 4 in the compression storage device of the first embodiment shown in FIG. Then, the storage unit 21 sends the error E of the first area 6 designated by the address CNTB to the data reproducing unit 22, and sends the time stamp ST to the time stamp comparing unit 23.

The time stamp comparing section 23 is composed of a plurality of exclusive OR circuits 23a, an AND gate 23b and a NAND gate 23c. Each exclusive OR circuit 23a
Compares each bit of the time stamp TSA composed of a plurality of bits output from the time stamp generation unit 24 with each bit of the time stamp TS composed of a plurality of bits read from the storage unit 21, and if they do not match, The mismatch signal is input to the AND gate 2523b.

Therefore, the coincidence detection signal det output from the AND gate 23b is the same for both time stamps T.
When SA and TS do not completely match, it becomes L level,
When they match, the level changes to H level. This coincidence detection signal de
t is input to one end of the AND gate 22a of the data reproducing unit 22. The storage unit 2 is provided at the other end of the AND gate 22a.
The error E read from 1 is input.

Therefore, the error E is the coincidence detection signal d
et is at H level, that is, both time stamps TS
This AND gate 22 at the timing when A and TS match
After passing through a, it is input to the next flip-flop 22b. The flip-flop 22b outputs the error E read from the storage unit 21 as a reproduction error E _{R in} synchronization with the rising of the read clock signal CK. In addition, the data reproducing unit 22
Outputs the time stamp TSA output from the time stamp generation unit 24 at a constant cycle T ₀ as the reproduction time stamp TSA.

On the contrary, the data reproducing unit 22 synchronizes with the time stamp TSA until the time stamp TS output from the storage unit 21 matches the time stamp TSA sequentially output from the time stamp generating unit 24. 0]
To continue the output of the error E _R of.

Further, the AND gate 23c in the time stamp comparing section 23 synchronizes with the next rising edge of the read clock signal CK while the coincidence detection signal det is at H level, that is, both the time stamps TSA and TS coincide with each other. , The trigger signal G to the trigger terminal T of the read control unit 25.
Send CK.

Every time the trigger signal GCK applied to the trigger terminal T rises to H level, the read control unit 25 counts up the address value CNTB (count value) output to the storage unit 21 by one. As a result, the storage unit 2
1 outputs the error E and the time stamp TS stored in the next area 6 as error information (TS, E).

In the decompressing / reproducing apparatus for a collected event configured as described above, for example, when the time stamp TS and the error E having the illustrated values are stored in each area 6 of each address AD of 0 to 4 of the storage unit 21 As shown in the time chart of FIG. 20, while the read start signal h (ST) is at the L level, the first area 6 (address CNT) from the storage unit 21 is displayed.
B = 0) [0] error E is time stamp TSA
It is output together with (= 0). When the time stamp ST becomes the H level, the read control counter B = the time stamp counter A outputs the trigger signal GCK and the counter B is incremented by 1, so that the second area 6 address CNTB = 1 from the storage unit 21. ) Time stamp T
The error E of S (= 4) and [1] is output, but since the time stamp TS (= 4) does not match the time stamp TSA, this error E is blocked by the AND gate 22a and is not output. . As a result, the time stamp T
Each time stamp TSA until SA reaches 4 = 1
In 2 and 3, the error E _R of [0] is reproduced and output.

When the time stamp TSA reaches 4, the AND gate 22a is established and the error E of [1] stored in the second area 6 of the storage unit 21 is output as the error E _R.

As described above, each error E of [1] stored in each area 6 of the storage unit 21 has its own time stamp T.
When S coincides with the time stamp TSA output from the time stamp generating unit 24 at a constant cycle T ₀ , it is output as a reproduction error E _R. Therefore, it is possible to reproduce the error E (event change) of [0] or [1] of each data (event) compressed and stored in the storage unit 21.
It is possible to obtain substantially the same effect as the device of the fourth embodiment shown in FIG.

(Eighth Embodiment) FIG. 21 is a block diagram showing the schematic arrangement of a decompressing and reproducing apparatus for collected events according to an eighth embodiment of the present invention. The same parts as those of the seventh embodiment shown in FIG. 19 are designated by the same reference numerals. Therefore, detailed description of the overlapping portions will be omitted. FIG. 22 is a time chart showing each signal in the device of the embodiment shown in FIG.

The storage unit 21 in the apparatus of this embodiment is shown in FIG.
The storage unit 4a has the same configuration as the storage unit 4a of the second embodiment shown in FIG. 2, and each region 6 of the storage unit 21 has the same structure as that of the event change (error E) of the received data D. The time stamp TS and the event change (error E of [1] or [0]) at this time are stored.

Then, the storage unit 21 stores the time stamp TS and the error E of the area 6 designated by the address AD (CNTB) designated by the read control unit 25 in the data reproducing unit 2.
2 and the time stamp comparing unit 23.

The time stamp comparing unit 23 uses the time stamp TS read from the storage unit as the time stamp generating unit 24.
When it coincides with the time stamp TSA outputted at a constant period T ₀ from the AND circuit 23c, the H level coincidence detection signal det is sent to one side of the ANDCADE 23c, and the ANDCADE 23c generates the trigger signal GCR and the flip-flop 22b of the data reproducing section 22 Is applied to the trigger terminal T of.

Flip-flop 22 of data reproducing section 22
b is the trigger signal GCR applied to the trigger terminal T
In synchronization with the rising edge of, the error E sent from the storage unit 21 at this point is taken in the data terminal D and output as a reproduction error E _R.

The trigger signal GCR output from the time stamp comparison section 23 is applied to the trigger terminal T of the read control section 25. Then, the storage unit 21 outputs the time stamp TS and the error E of the next area 6.

Therefore, the data reproducing section 22 has the cycle T
Until the time stamp TSA sequentially output at ₀ matches the time stamp TS output from the storage unit 21 at the present time, the time stamp TSA is stored in the previous area 6 output from the storage unit 21 [0 ] Or [1] error E is continuously output as it is as a reproduction error E _R. When the time stamps TSA and TS match, the currently output error E is captured and output as a reproduction error E _R.

In the decompressing / reproducing apparatus for a collected event configured as described above, for example, when the time stamp TS and the error E having the illustrated values are stored in each area 6 of each address AD of 0 to 3 of the storage unit 21, As shown in the time chart of FIG. 22, when the read start signal h (ST) is input, the first area 6 (address CNT
B = 0) [0] error E is time stamp TSA
It is output together with (= 0).

Then, the output time stamp TSA
Is the time stamp TS of the second area 6 of the storage unit 21.
In the period where (= 4) is not reached, the error E (= 0) of the first area 6 is continuously output. When the time stamp TSA reaches the time stamp TS (= 4) of the second area 6 of the storage unit 21, the error E (= 1) of the second area 6 is output. The error E (= 1) of the second area 6 is the time stamp TSA of 3 in the storage unit 21.
It is continuously output until before the time stamp TS (= 7) of the second area 6 is reached.

Therefore, the error E (event change) of [0] or [1] of each data (event) compressed and stored in the storage unit 21 can be reproduced.
It is possible to obtain almost the same effect as the apparatus of the embodiment.
Further, when reproducing consecutive errors, the required storage capacity of the storage unit 21 can be further reduced as compared with the device of the seventh embodiment shown in FIG.

[0123]

As described above, in the compression storage device and the decompression playback device of the collection event of the present invention, only when the sequentially occurring events change from the reference event or when the change from the reference event changes. A time stamp for specifying the event change occurrence time is stored and held in the storage unit. Therefore, the storage capacity required by the storage unit can be significantly reduced, and the time of occurrence of any measurement data stored in the storage unit can be easily specified. In the case of compressed storage, it is possible to reproduce (reproduce) the abnormality occurrence pattern at a specific time.

[Brief description of drawings]

FIG. 1 is a block diagram showing a schematic configuration of a compression storage device for collecting events according to a first embodiment of the present invention.

FIG. 2 is a diagram showing stored contents of a storage unit of the apparatus of the embodiment.

FIG. 3 is a diagram showing a relationship between each time stamp and an error occurrence time in the apparatus of the embodiment.

FIG. 4 is a flowchart showing an operation of a decompression reproducing unit in the apparatus of the embodiment.

FIG. 5 is a diagram showing reproduction error information reproduced by the decompression reproducing unit.

FIG. 6 is a block diagram showing a schematic configuration of a compressed storage device for collecting events according to a second embodiment of the present invention.

FIG. 7 is a diagram showing a relationship between each time stamp and an error occurrence time in the apparatus of the embodiment.

FIG. 8 is a diagram showing stored contents of a storage unit in the apparatus of the embodiment.

FIG. 9 is a diagram showing stored contents of the first embodiment for comparison with the apparatus example of the same embodiment.

FIG. 10 is a block diagram showing a schematic configuration of a compressed storage device for collecting events according to a third embodiment of the present invention.

FIG. 11 is a diagram showing stored contents of a storage unit in the apparatus of the embodiment.

FIG. 12 is a diagram showing a relationship between each time stamp and an error occurrence time in the apparatus of the embodiment.

FIG. 13 is a diagram showing reproduction error information reproduced by a decompression reproducing unit incorporated in the apparatus of the embodiment.

FIG. 14 is a block diagram showing a schematic configuration of a decompressing / reproducing apparatus for a collected event according to a fourth embodiment of the present invention.

FIG. 15 is a block diagram showing a schematic configuration of a compressed storage device for collecting events according to a fifth embodiment of the present invention.

FIG. 16 is a time chart showing the operation of the apparatus of the embodiment.

FIG. 17 is a block diagram showing a schematic configuration of a compression storage device for collecting events according to a sixth embodiment of the present invention.

FIG. 18 is a time chart showing the operation of the apparatus of the embodiment.

FIG. 19 is a block diagram showing a schematic configuration of a decompressing and reproducing apparatus for collected events according to a seventh embodiment of the present invention.

FIG. 20 is a time chart showing the operation of the apparatus of the embodiment.

FIG. 21 is a block diagram showing a schematic configuration of a decompressing and reproducing apparatus for collected events according to an eighth embodiment of the present invention.

FIG. 22 is a time chart showing the operation of the apparatus of the embodiment.

[Explanation of symbols]

2, 2a ... Error detection unit (event change detection unit), 3, 3a
... write control section, 4, 4a, 21 ... storage section, 5, 24 ... time stamp generating section, 6, 6a ... area, 8, 8a ... decompression reproducing section, 11 ... delay section, 22 ... data reproducing section (event Generating means), 23 ... Time stamp comparing section, 25 ... Read control section

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical display location G06F 13/00 301 G06F 13/00 301B

Claims (5)

[Claims] 1. An event change detection unit (2) for detecting an event change indicating a change from a reference event among events sequentially input in time series, and specifying an input time of each event sequentially input. A time stamp generation unit (5) for generating a time stamp, a storage unit (6) for storing the time stamp, an event change detection signal of the event change detection unit, and A compressed storage device for collecting events, comprising: a write control unit (3) for writing a time stamp in the storage unit. 2. An event change detection unit (2a) for detecting an event change indicating a change with respect to a reference event among the events sequentially input in time series, and an input time of each event sequentially input is specified. A time stamp generation unit (5) for generating a time stamp, a storage unit (4a) for storing the time stamp and event change, and a change in each event change detected by the event change detection unit. , A writing control unit (3) for writing the time stamp and the event change signal at the time of detecting the change of the event change in the storage unit.
a) A compressed storage of collected events with and. 3. A storage unit (21) in which a time stamp that specifies the occurrence time of an event change with respect to a reference event of each event that occurs sequentially in time series is stored, and the time stamps stored in this storage unit are sequentially arranged. Read control means (25) for reading and time stamp sequence creating means (24) for creating a time stamp sequence for specifying the occurrence times of events that occur sequentially in time series
And an event change signal corresponding to each time stamp of the created time stamp sequence by assigning the event change to a time stamp corresponding to each of the read time stamps in the created time stamp sequence. And an event generating means (22) for sequentially outputting 4. A time stamp that specifies the occurrence time of the change of the event change with respect to the reference event for each event that occurs sequentially in time series, and a storage unit that stores the event change of the event at the change time of the event change ( 21), read control means (25) for sequentially reading changes in each time stamp and each event change stored in this storage unit, and a time stamp sequence for specifying the occurrence time of events that occur sequentially in time series. Time stamp sequence creating means to create (24)
And assigning the event change of the previously read time stamps to each time stamp existing between the time stamps corresponding to the read time stamps in the created time stamp sequence, A decompression / reproduction device for a collected event, comprising: an event generation means (22) for sequentially outputting an event change signal corresponding to each time stamp of the created time stamp sequence. 5. The collected event according to claim 3 or 4, further comprising a time stamp reproduction means for adding time stamps corresponding to event changes sequentially output by the event generation means. Extension playback device.