CN110942531A - Method and device for acquiring data by automobile data recorder - Google Patents

Method and device for acquiring data by automobile data recorder Download PDF

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Publication number
CN110942531A
CN110942531A CN201911255502.8A CN201911255502A CN110942531A CN 110942531 A CN110942531 A CN 110942531A CN 201911255502 A CN201911255502 A CN 201911255502A CN 110942531 A CN110942531 A CN 110942531A
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China
Prior art keywords
data
vehicle
event
information
frame
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Pending
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CN201911255502.8A
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Chinese (zh)
Inventor
周志文
梁智游
纪向晴
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SHENZHEN MAPGOO TECHNOLOGY Co Ltd
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SHENZHEN MAPGOO TECHNOLOGY Co Ltd
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Priority to CN201911255502.8A priority Critical patent/CN110942531A/en
Publication of CN110942531A publication Critical patent/CN110942531A/en
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    • GPHYSICS
    • G07CHECKING-DEVICES
    • G07CTIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
    • G07C5/00Registering or indicating the working of vehicles
    • G07C5/08Registering or indicating performance data other than driving, working, idle, or waiting time, with or without registering driving, working, idle or waiting time
    • G07C5/0841Registering performance data

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  • General Physics & Mathematics (AREA)
  • Traffic Control Systems (AREA)
  • Time Recorders, Dirve Recorders, Access Control (AREA)

Abstract

The embodiment of the invention discloses a method and a device for acquiring data by a vehicle event data recorder, wherein the method comprises the following steps: acquiring a video stream, wherein the video stream comprises a plurality of video frames with continuous acquisition moments; acquiring data of a vehicle, wherein the data of the vehicle comprises data collected by a positioning device of the vehicle; generating an information frame corresponding to each video frame according to the running data of the vehicle corresponding to the acquisition time of each video frame; and synchronously outputting the video frame and the information frame corresponding to the video frame. The invention adds an information frame to each frame of video frame in the video stream collected by the automobile data recorder, provides data obtained from the vehicle positioning device through the information frame, and can analyze the reason of accident generation through the information frame, thereby improving the readability of the video stream of the automobile data recorder.

Description

Method and device for acquiring data by automobile data recorder
Technical Field
The invention relates to the field of data acquisition, in particular to a method and a device for acquiring data by an automobile data recorder.
Background
The automobile data recorder has been used for a long time, mp4 video recorded by the traditional recorder has video stream and audio stream, the automobile data recorder can record the whole process of an event in a video and voice mode when an accident happens to a vehicle, but only video and voice information sometimes cannot know the specific reason of the accident.
Disclosure of Invention
In order to solve the technical problem, the embodiment of the invention provides a method and a device for acquiring data by a vehicle event data recorder.
The first aspect of the embodiments of the present invention provides a method for acquiring data by a vehicle event data recorder, where the method includes:
acquiring a video stream, wherein the video stream comprises a plurality of video frames with continuous acquisition moments;
acquiring data of a vehicle, wherein the data of the vehicle comprises data collected by a positioning device of the vehicle;
generating an information frame corresponding to each video frame according to the running data of the vehicle corresponding to the acquisition time of each video frame;
and synchronously outputting the video frame and the information frame corresponding to the video frame.
Optionally, the data collected by the vehicle's positioning device comprises at least one of a position, a speed, and a pose of the vehicle.
Optionally, the data of the vehicle further comprises event information of the vehicle.
Optionally, the event information includes at least one of overspeed event information, collision event information, and road condition information.
Optionally, the information frame includes the following fields:
event byte number, time stamp, byte number of sub-event, event type, sub-event type, event data, sub-event data.
The second aspect of the embodiments of the present invention provides a device for acquiring data by a driving recorder, where the device includes:
the acquisition module is used for acquiring a video stream, and the video stream comprises a plurality of video frames with continuous acquisition moments;
the system comprises an acquisition module, a processing module and a display module, wherein the acquisition module is used for acquiring data of a vehicle, and the data of the vehicle comprises data acquired by a positioning device of the vehicle;
the data generation module is used for generating information frames corresponding to the video frames according to the running data of the vehicle corresponding to the acquisition time of each video frame;
and the output module is used for synchronously outputting the video frame and the information frame corresponding to the video frame.
Optionally, the data collected by the vehicle's positioning device comprises at least one of a position, a speed, and a pose of the vehicle.
Optionally, the data of the vehicle further comprises event information of the vehicle.
Optionally, the event information includes at least one of overspeed event information, collision event information, and road condition information.
Optionally, the information frame includes the following fields:
event byte number, time stamp, byte number of sub-event, event type, sub-event type, event data, sub-event data.
According to the technical scheme provided by the embodiment of the invention, an information frame is added to each frame of video frame in the video stream acquired by the automobile data recorder, the information frame provides data acquired from a positioning device of a vehicle, the reason for the accident can be analyzed through the information frame, and the readability of the video stream of the automobile data recorder is improved.
Drawings
Fig. 1 is a schematic flow chart of a method of acquiring data by a vehicle event data recorder according to an embodiment of the present invention;
fig. 2 is a block diagram of a device for acquiring data by a driving recorder in an embodiment of the invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the following embodiments may be combined without conflict.
Fig. 1 is a schematic flow chart of a method of acquiring data by a vehicle event data recorder according to an embodiment of the present invention; as shown in fig. 1, a method for acquiring data by a driving recorder according to an embodiment of the present invention may include the following steps:
s101: acquiring a video stream, wherein the video stream comprises a plurality of video frames with continuous acquisition moments;
specifically, images in front of the vehicle are shot through a camera of the automobile data recorder, and a video stream is obtained. The video stream of the present embodiment includes video information and audio information.
Optionally, the video stream is in MP4 format; of course, the video stream may be in other video formats.
S102: acquiring data of a vehicle, wherein the data of the vehicle comprises data collected by a positioning device of the vehicle;
the data collected by the vehicle's positioning device may include at least one of a position, a speed, and an attitude of the vehicle. The position can comprise longitude and latitude, height and other information; the attitude may include attitude information such as pitch angle, roll angle, yaw angle, and the like.
The positioning device of the present embodiment may be a GPS, or may be other.
The information frame may not only be incorporated into the data collected by the vehicle's locating device, but also into information generated by other modules on the vehicle, for example, in some embodiments, the vehicle's data may also include event information for the vehicle. Optionally, the event information includes at least one of overspeed event information, collision event information, and road condition information; of course, the event information may include others.
The overspeed event information and the road condition information can be identified by a deep learning mode, and the collision event information can be identified by a three-axis accelerator on the vehicle.
S103: generating an information frame corresponding to each video frame according to the running data of the vehicle corresponding to the acquisition time of each video frame;
information frames corresponding to a plurality of video frames form an information stream.
The information frame of this embodiment is expandable, and the frame rate of the information stream output by the event data recorder is set to be the same as the frame rate of the video stream output by the event data recorder, and the time stamp unit of the information stream and the time stamp unit of the video stream are both 90000. In the process of recording the video stream, the automobile data recorder synchronously generates an information frame every time a video frame is generated. Therefore, when the video stream file is extracted to be played after the car accident event occurs, the player can display the information frame while playing the video frame (namely audio and video data) by analyzing the information stream, or the player analyzes the reason generated by the accident and displays the result according to the information stream. It should be noted that, the implementation of analyzing the information flow to determine the accident is the prior art.
Optionally, the information frame includes the following fields: event byte number, time stamp, byte number of sub-event, event type, sub-event type, event data, sub-event data.
Alternatively, each frame of information is referred to as a box, and a box may contain sub-boxes of various types of events. These types of events may include data collected by a vehicle's positioning device, overspeed event information, collision event information, and road condition information, among others.
The byte number of the box (including the field) occupies 4 bytes;
pts is the time of the box in the MP4 file, and the unit is millisecond, and the time occupies 4 bytes;
sub box size, the number of bytes of the sub box (including the field) occupies 4 bytes;
the evnet type is an event type and occupies 2 bytes;
sub evnet type is a sub event type, and occupies 4 bytes;
the specific data format of the evnet data, sub box data, is determined by evnet type and/or sub evnet type, and can be null;
n.
Specifically, for example, the positioning device of the vehicle collects data as an event type without a sub-event type, and the event data includes at least one of a position, a speed, and an attitude of the vehicle. The driving event types include sub-event types such as a collision event, an overspeed event, a rapid acceleration event, etc., and may not include event data.
S104: and synchronously outputting the video frame and the information frame corresponding to the video frame.
The data of the information frame can be loaded into the corresponding video frame, and the data of the information frame is directly displayed on the output video frame; the video frame and the information frame corresponding to the video frame can also be packaged in the same file, and the video frame and the information frame corresponding to the video frame can be synchronously output through the output file.
According to the method for acquiring data by the automobile data recorder, an information frame is added to each frame of video frame in the video stream acquired by the automobile data recorder, the data acquired from the vehicle positioning device is provided through the information frame, the reason of accident generation can be analyzed through the information frame, and the readability of the video stream of the automobile data recorder is improved.
The method for acquiring data by the automobile data recorder in the embodiment of the invention is described above, and the device for acquiring data by the automobile data recorder in the embodiment of the invention is described below. Fig. 2 is a block diagram of a device for acquiring data by an automobile data recorder according to an embodiment of the present invention, please refer to fig. 2, where the device for acquiring data by an automobile data recorder according to an embodiment of the present invention may include: the device comprises an acquisition module, a data generation module and an output module.
The system comprises an acquisition module, a processing module and a display module, wherein the acquisition module is used for acquiring a video stream, and the video stream comprises a plurality of video frames with continuous acquisition moments;
the system comprises an acquisition module, a processing module and a display module, wherein the acquisition module is used for acquiring data of a vehicle, and the data of the vehicle comprises data acquired by a positioning device of the vehicle;
the data generation module is used for generating information frames corresponding to the video frames according to the running data of the vehicle corresponding to the acquisition time of each video frame;
and the output module is used for synchronously outputting the video frame and the information frame corresponding to the video frame.
Optionally, the data collected by the vehicle's positioning device comprises at least one of a position, a speed, and a pose of the vehicle.
Optionally, the data of the vehicle further comprises event information of the vehicle.
Optionally, the event information includes at least one of overspeed event information, collision event information, and road condition information.
Optionally, the information frame includes the following fields:
event byte number, time stamp, byte number of sub-event, event type, sub-event type, event data, sub-event data.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims (10)

1. A method for acquiring data by a vehicle event data recorder, the method comprising:
acquiring a video stream, wherein the video stream comprises a plurality of video frames with continuous acquisition moments;
acquiring data of a vehicle, wherein the data of the vehicle comprises data collected by a positioning device of the vehicle;
generating an information frame corresponding to each video frame according to the running data of the vehicle corresponding to the acquisition time of each video frame;
and synchronously outputting the video frame and the information frame corresponding to the video frame.
2. The method of claim 1, wherein the data collected by the vehicle's positioning device includes at least one of a position, a speed, and an attitude of the vehicle.
3. The method of claim 1, wherein the data of the vehicle further comprises event information of the vehicle.
4. The method of claim 3, wherein the event information comprises at least one of overspeed event information, collision event information, and road condition information.
5. The method of claim 1, wherein the information frame comprises the following fields:
event byte number, time stamp, byte number of sub-event, event type, sub-event type, event data, sub-event data.
6. An apparatus for acquiring data by a driving recorder, the apparatus comprising:
the acquisition module is used for acquiring a video stream, and the video stream comprises a plurality of video frames with continuous acquisition moments;
the system comprises an acquisition module, a processing module and a display module, wherein the acquisition module is used for acquiring data of a vehicle, and the data of the vehicle comprises data acquired by a positioning device of the vehicle;
the data generation module is used for generating information frames corresponding to the video frames according to the running data of the vehicle corresponding to the acquisition time of each video frame;
and the output module is used for synchronously outputting the video frame and the information frame corresponding to the video frame.
7. The apparatus of claim 6, wherein the data collected by the vehicle's positioning device includes at least one of a position, a speed, and an attitude of the vehicle.
8. The apparatus of claim 6, wherein the data of the vehicle further comprises event information of the vehicle.
9. The apparatus of claim 8, wherein the event information comprises at least one of overspeed event information, collision event information, and road condition information.
10. The apparatus of claim 6, wherein the information frame comprises the following fields:
event byte number, time stamp, byte number of sub-event, event type, sub-event type, event data, sub-event data.
CN201911255502.8A 2019-12-10 2019-12-10 Method and device for acquiring data by automobile data recorder Pending CN110942531A (en)

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CN114511945A (en) * 2022-01-28 2022-05-17 深圳市麦谷科技有限公司 Method, device, equipment and medium for generating driving track of single-machine driving recorder
CN115482603A (en) * 2021-06-15 2022-12-16 上海博泰悦臻网络技术服务有限公司 Vehicle safety information management method, automobile data recorder, vehicle-mounted terminal and system

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CN109410583A (en) * 2018-11-29 2019-03-01 上海市城市建设设计研究总院(集团)有限公司 Traffic information collection and analysis system and operation method based on automobile data recorder
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CN103778687A (en) * 2014-01-08 2014-05-07 广西鑫朗通信技术有限公司 High-efficiency transmission system for vehicle wireless video monitoring
CN105205882A (en) * 2015-09-30 2015-12-30 北京九五智驾信息技术股份有限公司 Driving video recording method and driving recorder
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