JP5700760B2 - Record information analysis method, record information analysis program, and record information analysis apparatus - Google Patents

Description

  The present invention relates to a drive recorder for a vehicle, a recording information analysis method, a recording information analysis program, and a recording information analysis device, and more particularly to a technique for correctly identifying the stop timing of a vehicle.

  For example, a vehicular drive recorder developed on the assumption that it is installed in a car is equipped with an in-vehicle camera, and generally images the situation in a short time zone including when an abnormality such as a traffic accident occurs. Automatically record and save as information. The presence or absence of an abnormality such as a traffic accident can be automatically identified by using an acceleration sensor or the like. In the case of a drive recorder equipped with a large-capacity storage device, images taken by the in-vehicle camera may be continuously recorded continuously. In this case, when an abnormality occurs, information on a mark (flag) indicating the occurrence of the abnormality is recorded together with the image.

  Such a drive recorder can reliably record the situation at the timing before and after that point as an image when a dangerous situation occurs while driving a car or when a traffic accident actually occurs. it can. Therefore, the information recorded by the drive recorder can be used as evidence when investigating the situation of an accident, or can be used for management and analysis of safe driving.

  In addition, as in a drive recorder disclosed in Patent Document 1, for example, information on the vehicle speed (vehicle speed) detected by the vehicle speed sensor may be recorded together with an image.

  In addition to a drive recorder that records images, an operation state recording device called a digital tachograph is known as a device that automatically records various information related to the state of the vehicle. The digital tachograph can automatically record vehicle speed, engine speed, etc. as time series information.

  Further, Patent Document 2 discloses a vehicle movement data analysis system for reading and analyzing information recorded by a drive recorder and performing driving evaluation. Patent Document 2 discloses an apparatus that displays and reproduces a captured image in synchronization with a vehicle speed obtained from a GPS device.

JP 2000-6854 A JP 2008-286986 A

  For example, when data recorded by a drive recorder disclosed in Patent Document 1 is read and analyzed, the captured image and the vehicle speed can be displayed and reproduced in synchronization. Therefore, it is possible to know from the display contents how many km / h the vehicle speed in the state represented by each image frame at the time of reproduction is.

  However, the vehicle speed information actually recorded by the drive recorder is not very accurate, and there may be a difference between each image frame and the vehicle speed during reproduction.

  Generally, a vehicle speed sensor used for detecting a vehicle speed in a vehicle outputs one vehicle speed pulse signal every time a wheel rotates by a certain amount. This vehicle speed pulse signal is a binary signal having an on-level state and an off-level state. Since the generation cycle of the vehicle speed pulse signal changes according to the vehicle speed, the vehicle speed can be calculated from the vehicle speed pulse signal.

  For example, as in “(a) vehicle speed calculation method 1” shown in FIG. 6, if the number of pulses n of the vehicle speed pulse signal that appears during a certain time is known, the movement distance per pulse, the length of the certain time, The vehicle speed can be calculated based on the number of pulses n.

  Further, as in “(b) vehicle speed calculation method 2” shown in FIG. 6, if an elapsed time t during which a certain number of pulses (for example, 4 pulses) appear is known, it corresponds to a certain number (for example, 4 pulses) of pulses. The vehicle speed can be calculated on the basis of the travel distance and the elapsed time t.

  Therefore, when the vehicle speed is calculated from the vehicle speed pulse signal output from the vehicle speed sensor by the method as described above, a time delay occurs between the calculated vehicle speed and the actual vehicle speed change when the vehicle speed changes. To do. In other words, in the case of the “vehicle speed calculation method 1”, the vehicle speed is not fixed until a certain time has elapsed, so that a delay occurs for that time, and particularly when the vehicle speed is low, the calculated vehicle speed is The error increases. Further, in the case of the “vehicle speed calculation method 2”, the elapsed time t becomes very long particularly when the vehicle speed is low, so that a long time delay occurs until the vehicle speed is determined.

  Therefore, when the drive recorder records information on the vehicle speed (calculated vehicle speed) calculated by the method as described above, a time lag occurs between each image frame and the vehicle speed during reproduction (for example, FIG. 4 corresponds to the difference between Vx and Vy in FIG. In particular, when trying to confirm the situation when the vehicle transitions from the moving state to the stopped state by the reproduced image, the displayed image is displayed at the same time even though the vehicle is already stopped. The calculated vehicle speed information is greater than zero.

  For example, when reading the data recorded by a drive recorder and analyzing the situation of a traffic accident, at which position (at what timing) the vehicle stopped and what kind of situation at that time It is very important that the image can be confirmed by the recorded image. However, if there is a time lag between the image and the vehicle speed during reproduction, the stop position cannot be correctly grasped.

  The present invention has been made in view of the above-described circumstances, and an object of the present invention is to provide a vehicle drive recorder, a recording information analysis method, and a recording information analysis program that are useful for accurately grasping information related to the situation at the time of stopping of the vehicle. And providing a recorded information analyzing apparatus.

In order to achieve the above-described object, the recorded information analysis method according to the present invention is characterized by the following (1).
(1) A recorded information analysis method for a computer to read out and manage data from a predetermined recording medium in which information relating to the operation state of the vehicle is recorded as time-series data, and to detect the timing at which the vehicle stops. ,
The time-series data includes information on a calculated vehicle speed calculated based on a vehicle speed pulse signal generated as the vehicle moves, and information on a pulse indicating the presence or absence of the vehicle speed pulse signal or an on / off level of the vehicle speed pulse signal. If included
After the 0 pulse time specifying unit of the computer detects the first timing when the vehicle is switched from the moving state to the stopped state based on the calculated vehicle speed information of the time series data,
The time series data is searched from the position of the detected first timing in the direction of going back in time, and the vehicle actually performs the second timing, which is the first position at which the change in the vehicle speed pulse signal disappears. It should be detected as the timing when it stopped.

According to the recording information analysis method having the above configuration ( 1 ), when analyzing data recorded by a drive recorder or the like, it is possible to correctly detect the timing at which the vehicle actually stopped, and in a short time required. The stop timing can be detected. When only the pulse information is used, it is inevitable that the correct timing cannot be detected or the time required for detection becomes long.

In order to achieve the above-described object, a recorded information analysis program according to the present invention is characterized by the following (2).
(2) A recorded information analysis program for causing the 0 pulse time specifying unit of the computer to execute the procedure described in (1) above.

By executing the recording information analysis program having the above configuration ( 2 ) on a predetermined computer, the timing at which the vehicle is actually stopped can be correctly detected when analyzing data recorded by a drive recorder or the like. Moreover, it is possible to detect the timing of stopping in a short required time.

In order to achieve the above-described object, the recorded information analysis apparatus according to the present invention is characterized by the following ( 3 ).
( 3 ) A recording information analysis apparatus that reads out, reproduces and displays time-series data including an image recorded by a predetermined vehicle drive recorder from a predetermined recording medium,
The time-series data includes information on a calculated vehicle speed calculated based on a vehicle speed pulse signal generated as the vehicle moves, and information on a pulse indicating the presence or absence of the vehicle speed pulse signal or an on / off level of the vehicle speed pulse signal. If included
When displaying and reproducing the time-series data image and the vehicle speed in synchronism, when there is a vehicle speed 0 period in which the calculated vehicle speed is 0, the time goes backward from the position of the start time of the vehicle speed 0 period. Searching the time series data, a 0 pulse time specifying unit for specifying a 0 pulse time, which is the first position where the change in the vehicle speed pulse signal ceases,
A display control unit for displaying the vehicle speed in a stopped state in the range from the 0 pulse time to the start time of the vehicle speed 0 period.

According to the recording information analyzing apparatus having the configuration ( 3 ), when an image recorded by the vehicle drive recorder is read and reproduced, when the image in a state where the vehicle is stopped is displayed, the stopped state is displayed. The correct vehicle speed 0 can be displayed simultaneously. Therefore, it is possible to correctly analyze an accident or the like.

As described above, it records information analysis method of the present invention, the recording information analysis program, and a recording information analyzer serves to accurately grasp the information on the status of stop time of the vehicle. In addition, since there is no time lag between the displayed image and the vehicle speed, the user does not feel uncomfortable during image reproduction.

  The present invention has been briefly described above. Further, details of the present invention will be further clarified by reading through the modes for carrying out the invention described below with reference to the accompanying drawings.

It is a block diagram which shows the structural example of the drive recorder for vehicles. It is a block diagram which shows the structural example of a recording information analysis apparatus. It is a schematic diagram which shows the structural example of the time series data recorded. It is a time chart which shows the specific example of the relationship between a calculation vehicle speed and an actual vehicle speed. It is a flowchart which shows main operation | movement of a recorded information analysis apparatus. (A), (b) is a time chart showing the method for calculating a vehicle speed from a vehicle speed pulse signal.

Record information analysis method of the present invention, a specific embodiment of a recording information analysis program, and a recording information analysis apparatus will be described below with reference to the drawings.

  A configuration example of the vehicle drive recorder in the present embodiment is shown in FIG. As shown in FIG. 1, the vehicle drive recorder 10 includes signal input terminals 11, 12, and 13, a signal input terminal 13, an image data recording unit 14, a trigger detection unit 15, a vehicle speed calculation unit 16, and a pulse information acquisition unit. 17, a time-series data recording unit 18 and a recording medium 24 are provided.

  Although not shown, the actual vehicle drive recorder 10 is constituted by hardware of an electric circuit including a control microcomputer and an internal memory. Most of the functions of the image data recording unit 14, the trigger detection unit 15, the vehicle speed calculation unit 16, the pulse information acquisition unit 17, and the time series data recording unit 18 shown in FIG. 1 are realized by the processing of the microcomputer.

  As shown in FIG. 1, signal input terminals 11, 12, and 13 of the vehicle drive recorder 10 are connected to the output of the in-vehicle camera 21, the output of the acceleration sensor 22, and the output of the vehicle speed sensor 23, respectively.

  The in-vehicle camera 21 can continuously or periodically capture an image of a subject existing in a predetermined capturing direction and output two-dimensional image data. For example, the position and direction of the in-vehicle camera 21 are determined and fixed on the vehicle so that an area equivalent to the field of view of the driver driving the vehicle can be photographed.

  The acceleration sensor 22 outputs an electrical signal indicating the magnitude of acceleration (G) applied to the vehicle. This signal is used to identify whether or not an abnormal condition such as a traffic accident has occurred. The acceleration sensor 22 may be built in the vehicle drive recorder 10.

  The vehicle speed sensor 23 outputs a vehicle speed pulse signal that can be used for detecting the moving speed (vehicle speed) of the vehicle. Actually, the vehicle speed sensor 23 detects the rotation of the gear on the output shaft side of the transmission (transmission) connected to the wheels of the vehicle. Therefore, each time the wheel rotates by a predetermined amount and the vehicle moves by a predetermined amount, one pulse signal appears as a vehicle speed pulse signal. This vehicle speed pulse signal is a binary signal as shown in FIG. 6, for example. That is, when there is no pulse, it is off level (low level), and when a pulse appears, it is temporarily on level (high level). The pulse generation cycle changes according to the vehicle speed.

  The recording medium 24 is provided for storing data recorded by the vehicle drive recorder 10. As a realistic recording medium 24, it is assumed that a memory card incorporating a nonvolatile memory is used. The recording medium 24 is preferably detachable from the vehicle drive recorder 10.

  The trigger detection unit 15 compares the magnitude of acceleration detected by the acceleration sensor 22 with a predetermined threshold value, and generates a trigger signal when the acceleration exceeds the threshold value. That is, a trigger signal is generated when an abnormally large acceleration is detected, such as when a traffic accident occurs.

  When the trigger signal output from the trigger detection unit 15 appears, the image data recording unit 14 generates image data output from the in-vehicle camera 21 for a predetermined time before and after that (for example, 10 seconds before and after). It records on the recording medium 24 with the information of the image | photographed time.

  In addition, in order to enable recording on the recording medium 24 of an image taken before the trigger is generated, a buffer memory capable of temporarily storing image data for a past predetermined time (for example, 10 seconds) is recorded in the image data. The unit 14 is built in. That is, image data output from the in-vehicle camera 21 is always recorded in the buffer memory. Also, new data is overwritten instead of old data on the buffer memory.

  Therefore, when the trigger signal is generated, the image data recording unit 14 can read out the data of the image captured before that from the buffer memory and record it on the recording medium 24.

  The vehicle speed calculation unit 16 calculates the vehicle speed based on the vehicle speed pulse signal output from the vehicle speed sensor 23 by calculation. In order to distinguish from the actual vehicle speed or the like, here, the vehicle speed obtained by the vehicle speed calculation unit 16 is referred to as “calculated vehicle speed”.

  The vehicle speed calculation part 16 calculates | requires a vehicle speed from the said vehicle speed pulse signal using a general method. A typical example of a general method for calculating the vehicle speed from the vehicle speed pulse signal is a “vehicle speed calculation method 1” or a “vehicle speed calculation method 2” shown in FIG.

  In the example of “vehicle speed calculation method 1” shown in FIG. 6, the number n of pulses appearing in the vehicle speed pulse signal during a predetermined time period is counted. Then, the vehicle speed (km / h) is obtained by calculation based on the movement distance (constant) per pulse, the length of the predetermined time, and the number of pulses n.

  Further, in the example of “vehicle speed calculation method 2” shown in FIG. 6, the number n of pulses appearing in the vehicle speed pulse signal from a certain time t11 is counted, and the number n of pulses becomes a constant number (for example, 4 pulses). Time t12 is detected, and an elapsed time t from time t11 to t12 is obtained. Then, the vehicle speed is calculated based on the moving distance (constant) corresponding to a certain number (for example, 4 pulses) of pulses and the elapsed time t. In the example of “vehicle speed calculation method 2”, since the elapsed time t becomes very long at low speed, the time required to detect the vehicle speed is very long unless it is processed as a time-out when this exceeds a predetermined time. Become.

  The pulse information acquisition unit 17 identifies whether or not a pulse appears in the vehicle speed pulse signal every predetermined time (for example, 0.1 second), and acquires the result as information on the presence or absence of the vehicle speed pulse. That is, during a certain period of time, the vehicle speed pulse signal has been detected to rise (change in signal level from off level to on level) or fall (change in signal level from on level to off level) one or more times. In this case, “vehicle speed pulse present” is set, and when no vehicle speed pulse is detected, “vehicle speed pulse absent” is set.

  The time-series data recording unit 18 includes acceleration information input from the acceleration sensor 22, calculated vehicle speed information input from the vehicle speed calculation unit 16, and “vehicle speed pulse presence / absence” information input from the pulse information acquisition unit 17. Are periodically recorded in the recording medium 24 as time-series data. Note that the acceleration information is not necessarily recorded as time series data. Similar to the operation of the image data recording unit 14, the time-series data recording unit 18 records time-series data on the recording medium 24 for a predetermined time (for example, 10 seconds before and after) when the trigger signal appears. To do.

  A specific configuration example of the time-series data recorded on the recording medium 24 is shown in FIG. In the time-series data shown in FIG. 3, the time (hour, minute, second), “calculated vehicle speed” (km / h), “vehicle speed pulse presence / absence” (at a fixed time interval of 0.1 second) ( 0: No, 1: Yes) is recorded. The time information recorded in the time series data is used to associate the time series data with each frame of the recorded image. Therefore, for example, a serial number representing a number assigned to each frame of the image may be recorded instead of the time.

  By the way, the calculated vehicle speed output from the vehicle speed calculation unit 16 is calculated by a method as shown in FIG. 6, so that there is a slight deviation from the actual vehicle speed. For example, like the difference between “actual vehicle speed Vx” indicated by a dotted line in FIG. 4 and “calculated vehicle speed Vy” indicated by a solid line, the calculated vehicle speed Vy is delayed with respect to the actual vehicle speed Vx. Therefore, as shown in FIG. 4, when the vehicle stops at time t0, the actual vehicle speed Vx becomes 0 at time t0, but the calculated vehicle speed Vy at that time is a value greater than 0, and after a while, time t1 Then, the calculated vehicle speed Vy also becomes zero.

  In the case of a general drive recorder, only the calculated vehicle speed is recorded on the recording medium as information related to the vehicle speed. Therefore, when the image data recorded on the recording medium by such a drive recorder is reproduced and analyzed, only the calculated vehicle speed can be used to detect the timing when the vehicle stops. Therefore, the first timing at which the calculated vehicle speed changes from 0 in a state where the calculated vehicle speed is greater than 0, that is, time t1 in FIG. 4 is grasped as the stop position. However, since the timing at which the vehicle actually stops is time t0 in FIG. 4, it is determined that the vehicle has stopped at a timing different from the actual time. For this reason, the analyst recognizes an image captured at a timing (t1) different from the timing (t0) when the vehicle actually stops as an image captured when the vehicle stopped, and cannot accurately grasp the situation. .

  On the other hand, the above-described time delay does not occur in the “vehicle speed pulse presence / absence” information included in the time-series data recorded on the recording medium 24 by the vehicle drive recorder 10 shown in FIG. That is, as shown in FIG. 4, in the state where “actual vehicle speed Vx” is larger than 0 (the vehicle is moving), the “vehicle speed pulse presence / absence” information is always “present”, and the vehicle stops and “actually “Vehicle speed pulse presence / absence” information is switched to “None” at a timing that substantially coincides with the time t0 when the “vehicle speed Vx” becomes “0” (the error is about 0.1 seconds, for example). Therefore, when the information of “vehicle speed pulse presence / absence” is included in the time series data, the correct timing at which the vehicle stopped at the time (t0) when the “vehicle speed pulse presence / absence” changed from “present” to “absent”. Can be detected as

  Next, the recording information analysis apparatus 30 used when analyzing the data recorded by the vehicle drive recorder 10 described above will be described. For example, when a traffic accident occurs, the cause of the accident may be specified by analyzing the image at the time of the accident recorded on the recording medium 24 by the vehicle drive recorder 10, vehicle speed, acceleration, and the like. Is possible. When performing such an analysis, for example, a recorded information analysis apparatus 30 as shown in FIG. 2 is used.

  As shown in FIG. 2, the recording information analysis device 30 includes an analysis computer main body 31, a memory card reader 32, an operation unit 33, a display device 34, and a recording information analysis program 35.

  As the computer main body 31 for analysis, a general personal computer can be used. The memory card reader 32 is connected to the analysis computer main body 31 in order to read the content of the recording medium 24 holding the data recorded by the vehicle drive recorder 10.

  The operation unit 33 is an input device for accepting an input operation by an analyst, and corresponds to a keyboard and a mouse. The display device 34 is used to display information such as reproduced images and vehicle speed on a two-dimensional screen. As the display device 34, a liquid crystal display device or the like is used.

  The recorded information analysis program 35 is a program that can be read and executed by the analysis computer main body 31 and has various functions for analyzing data on the recording medium 24. For example, the recording information analysis program 35 also includes a function for realizing each step of the processing shown in FIG.

The operation of the recorded information analysis apparatus 30 shown in FIG. 5 will be described below.
In step S11, in accordance with a user (analyzer) instruction input from the operation unit 33, the analyzing computer main body 31 reads data from the recording medium 24 via the memory card reader 32, and reproduces this data. That is, the image data is continuously displayed as a moving image on the screen of the display device 34, the image of a specific frame is displayed in a stationary state, or the images are displayed one frame at a time interval in order. The position of the frame to be displayed is moved forward or backward on the time axis. In addition, vehicle speed and acceleration information is extracted from time-series data at the same time as the frame of the image to be displayed, and these are simultaneously displayed on the screen.

  In step S12, it is identified whether or not the location where the vehicle is stopped is included in the data to be reproduced. For example, when a traffic accident occurs, the situation where the vehicle has transitioned from the moving state to the stopped state when data recorded as an image of the period of about 10 seconds before and after that point is read from the recording medium 24 Also included is data representing That is, time-series data including information on the calculated vehicle speed that has changed such as “calculated vehicle speed Vy” is recorded as “actual vehicle speed Vx” illustrated in FIG. 4.

  In step S12, for example, the content of “calculated vehicle speed” of the time series data as shown in FIG. 3 is referred to, and it is identified whether or not a portion where the calculated vehicle speed is 0 is included. Furthermore, when the location where the calculated vehicle speed is 0 is included, the first time (t1 in FIG. 3) when the calculated vehicle speed changes from the moving state where the calculated vehicle speed is greater than 0 to the stop state where the calculated vehicle speed is 0 is detected.

  In step S13, the position at which the time series data is referred to is shifted by a certain time (0.1 seconds in the example of FIG. 3) from the current reference timing (initially t1) toward the time going back. Moving.

  In step S14, the information of “vehicle speed pulse presence / absence” included in the time series data is referred. If this is 1 (with pulse), the process proceeds to step S15, and if 0 (no pulse), the process returns to step S13.

  That is, referring to the information of “presence / absence of vehicle speed pulse” at each position in order from the position of time t1, the position at time t0 when “vehicle speed pulse presence / absence” changed from “0” to “1” is determined. After the detection, the process proceeds to the next step S15.

  In step S15, in order to indicate that the vehicle is in a stopped state when an image frame later in time (t0 + 0.1 seconds or later) is reproduced with reference to the position at time t0 detected in step S14, The vehicle speed is displayed as 0 km / h. That is, the vehicle speed greater than 0 km / h at time t0 to t1 in the “calculated vehicle speed” of the time series data is rewritten to 0.

  That is, when the content of “calculated vehicle speed” recorded as time series data on the recording medium 24 is displayed as it is, the actual stop time is t0 as shown in FIG. Otherwise, the vehicle speed will not drop to zero. However, when the processing shown in FIG. 5 is performed, the correct vehicle speed (0 km / h) can be displayed when displaying each image frame after the actual stop time t0.

  In the vehicle drive recorder 10 shown in FIG. 1, every time a trigger occurs, data such as an image is recorded on the recording medium 24 for a predetermined time before and after that time. This recording operation is always performed. May be. When data such as an image is constantly recorded, it is necessary to record some information representing the timing along with the data such as an image at the timing when the trigger is generated so that the timing when the abnormality occurs can be grasped at the time of analysis.

  In the vehicle drive recorder 10 shown in FIG. 1, the pulse information acquisition unit 17 detects the presence / absence of pulse information (presence / absence of level change) within a predetermined time (0.1 second), and the result is expressed as “vehicle speed”. It is recorded in time-series data as “pulse presence / absence”. Instead of this “presence / absence of vehicle speed pulse”, the on / off level at each time point of the vehicle speed pulse signal may be recorded as it is in the time series data. In that case, when referring to the time-series data in step S14 shown in FIG. 5, it is only necessary to detect the position where the on / off level of the vehicle speed pulse signal changes from the state where it does not change to the state where it changes.

  In the vehicle drive recorder 10 shown in FIG. 1, time series data including “calculated vehicle speed” and “vehicle speed pulse presence / absence” is recorded as data independent of the image, but these are integrated data. It may be recorded. For example, for each frame of an image to be recorded, information on “calculated vehicle speed” and “presence / absence of vehicle speed pulse” at the time of capturing the image may be added to the image data.

  As described above, by recording the vehicle state using the vehicle drive recorder of the present invention, not only the calculated vehicle speed information but also the pulse information can be automatically recorded as time-series data. Further, when the recorded data is analyzed, the timing at which the vehicle stops can be accurately grasped by using the recording information analysis method or the recording information analysis program of the present invention. Furthermore, by using the recorded information analysis apparatus of the present invention, when reproducing recorded data and displaying an image, it is possible to display an accurate vehicle speed in a state represented by the image. Therefore, it is possible to grasp correct information when trying to analyze a situation such as a traffic accident based on the recorded data.

  Further, not only the drive recorder but also the case where the data recorded by the digital tachograph is analyzed, for example, when the above-described time series data is included, the recording information analysis method or the recording information analysis of the present invention is performed. By using the program, it is possible to grasp the correct timing when the vehicle stops.

DESCRIPTION OF SYMBOLS 10 Vehicle drive recorder 11-13 Signal input terminal 14 Image data recording part 15 Trigger detection part 16 Vehicle speed calculation part 17 Pulse information acquisition part 18 Time series data recording part 21 Car-mounted camera 22 Acceleration sensor 23 Vehicle speed sensor 24 Recording medium 30 Recording information Analysis device 31 Analysis computer main body 32 Memory card reader 33 Operation unit 34 Display device 35 Recorded information analysis program

Claims (3)

The computer reads and manages data from a predetermined recording medium in which information on the operation state of the vehicle is recorded as time-series data, and is a recorded information analysis method for detecting when the vehicle stops,
The time-series data includes information on a calculated vehicle speed calculated based on a vehicle speed pulse signal generated as the vehicle moves, and information on a pulse indicating the presence or absence of the vehicle speed pulse signal or an on / off level of the vehicle speed pulse signal. If included
After the 0 pulse time specifying unit of the computer detects the first timing when the vehicle is switched from the moving state to the stopped state based on the calculated vehicle speed information of the time series data,
The time series data is searched from the position of the detected first timing in the direction of going back in time, and the vehicle actually performs the second timing, which is the first position at which the change in the vehicle speed pulse signal disappears. The recording information analysis method is characterized in that it is detected as a timing when the recording stops. The recording information analysis program for making the said 0 pulse time specific | specification part of a computer perform the procedure of Claim 1. A recording information analyzing apparatus that reads out, reproduces and displays time-series data including an image recorded by a predetermined vehicle drive recorder from a predetermined recording medium,
The time-series data includes information on a calculated vehicle speed calculated based on a vehicle speed pulse signal generated as the vehicle moves, and information on a pulse indicating the presence or absence of the vehicle speed pulse signal or an on / off level of the vehicle speed pulse signal. If included
When displaying and reproducing the time-series data image and the vehicle speed in synchronism, when there is a vehicle speed 0 period in which the calculated vehicle speed is 0, the time goes backward from the position of the start time of the vehicle speed 0 period. Searching the time series data, a 0 pulse time specifying unit for specifying a 0 pulse time, which is the first position where the change in the vehicle speed pulse signal ceases,
A recording information analyzing apparatus comprising: a display control unit that displays a stopped vehicle speed in a range from the 0 pulse time to a start time of the vehicle speed 0 period.

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