KR20130085115A - Driving video recorder and recording method thereof - Google Patents

Abstract

PURPOSE: An image recording device of a car and an image recording method thereof are provided to find cause of a car accident by storing details of the car accident as perfectly as possible when the car accident occurs, thereby effectively dealing with the car accident. CONSTITUTION: An image recording device of a car comprises cameras (10,20), image grabbers (11,21), a vehicle information data unit (30), an image overlay unit (40), an image cue unit (60), an image classification unit (70), a compression processing unit (80), a video file error checking unit (90), and a video file storage unit (95). The image grabbers digitize and output images which are photographed by the cameras. The vehicle information data unit is connected to sensors which are mounted on the vehicle, and changes the output values of the sensors into data. The image overlay unit overlays the data of the vehicle information data unit and of the image grabbers. The image cue unit temporarily stores a visual signal of the image overlay unit. The image classification unit classifies the images which are output from the image cue unit, and the compression processing unit generates a compressed file by compressing the classified images. The video file error checking unit inspects errors of the compressed image file, and the video file storage unit stores error-checked files in a storing medium. [Reference numerals] (10) Camera (front); (11,21) Image grabber; (20) Camera (rear); (30) GPS signal, Driving data, Vehicle lamp data; (31) Driving data; (32) Driving data text storage; (40) Image overlay; (50) Image output (LCD); (60) Image queue; (70) Image classification; (71) Regular recording; (72) Event recording; (73) Abnormal termination recording; (80) Compression processing; (90) Image file error detection unit; (95) Image storage; (AA) Front/back

Description

Vehicle video recording device and video recording method {DRIVING VIDEO RECORDER AND RECORDING METHOD THEREOF}

The present invention not only stores and stores the parts related to the driving operation state, operation, behavior, and trajectory of the vehicle, but also automatically stores and stores the accident record information of the vehicle by automatically restoring and storing the image record abnormally terminated due to an accident or other reasons. An image recording apparatus and an image recording method for a vehicle that can be efficiently collected and stored.

As the number of automobiles increases, traffic accidents caused by automobiles inevitably increase. Moreover, the traffic accident rate in the city center which provides various traffic accident factors is increasing. It is not easy to identify the cause of the traffic accident and the perpetrators and victims because the traffic accidents occur in a momentary situation, and it is difficult to determine the exact traffic accidents as most cases are handled according to the on-site situation and testimony of the witnesses. Did. In particular, in the case of traffic accidents on exclusive roads or highways such as highways, the victims and offenders were reversed due to the wrong traffic accidents.

In order to identify the cause of traffic accidents, a vehicle video recorder (DVR) has been developed and commercialized for recording a vehicle's external image by installing it in a vehicle. Therefore, the technology is actively developed and discussed.

Korean Laid-Open Patent No. 2009-0105257 (published: October 7, 2009) relates to a "camera integrated image recording device for the vehicle", and to record the image of the front, rear, side of the car and the interior of the car A front camera and a rear camera configured as a case integrated with a built-in microphone, a built-in microphone for receiving ambient sounds by operating according to a user's selection information input through a key input unit, and a video and a built-in microphone obtained from the front and rear cameras. An encoder for converting the input audio signal into a digital signal capable of recording and storing, a vehicle driving information sensing means including a GPS module and a G-sensor to obtain driving information of the vehicle, and directly operating the vehicle according to the operating state of the vehicle RPM of the brake light fuse line, emergency light fuse line, flashing (side) and speed gauge in the fuse box The sensor interface means for receiving a corresponding signal from the vehicle driving information collection target including a signal stage, and the image recording information of the video and audio signals converted from the encoder and detached through the external memory interface means from the vehicle driving information collection target. Outputting and displaying the external memory means for recording and storing the acquired vehicle driving information, the external memory interface means for inputting and outputting data to and from the external memory means, and the image record information stored in the external memory means to the external image display terminal device. An image output module for the user, a key input means for manipulating the user's keys, an internal memory means for installing a firmware program for controlling internal functions, a decoder for converting a digital audio signal into an analog signal for audio output, and a decoder Converts the converted audio signal into voice and A speaker for outputting the incense, a time information providing unit for providing time information, display means for visually displaying information to be transmitted to a user, image recording information stored in an external memory means as a server of an external remote location, and vehicle operation A communication module for transmitting information, and for recording and storing the video signals obtained from the front camera and the rear camera and the audio signals input through the built-in microphone according to a user's control command input through the key input means in the external memory means. And controlling means for controlling the respective parts to control the external output and management of the image recording storage process and the image recording information stored in the external memory means and the vehicle driving information.

However, such a conventional video recording apparatus has a problem in that the configuration is complicated and the operation is difficult, as well as the production cost is increased and the user has to bear a high cost.

In addition, because the situation information is insufficient, and only a simple image storage and display, it is difficult to accurately analyze the accident, there is a problem that it is difficult to accurately reconstruct the surrounding situation at the moment of accident. In particular, in the method of recording an accident, whether or not an accident is detected through a simple sensor input, and the video is compressed and stored, due to the damage of the video storage device due to the accident, or the damage and unprocessed storage of the video stored at the time of the accident, There is a problem that it is difficult to analyze the correct accident because the video file is impossible to play.

The present invention has been proposed to solve the above problems, and an object of the present invention is to combine the images received from a plurality of cameras photographing the front and rear of the vehicle to store and compress the image in real time in case of an accident of the vehicle. In place of video files that are not played back due to damage of video recording device or sudden system stoppage, each video metadata swap method is adopted, and vehicle data can be perfectly preserved through backup data recovery function in case of an accident. It is an object to provide an image recording apparatus and an image recording method.

In order to achieve the above object, a video recording apparatus for a vehicle according to the present invention includes a camera (10, 20) mounted on a vehicle for capturing an image; Image grabbers (11, 21) for digitizing and outputting an image taken by the camera (10, 20); A vehicle information data unit 30 connected to a plurality of sensors mounted on the vehicle to data output values of the sensors; An image overlay unit 40 for overlaying the data of the vehicle information data unit 30 and the image grabbers 11 and 21; An image queue unit 60 for temporarily storing an image signal of the image overlay unit 40; An image classification unit 70 for classifying an image output from the image cue unit 60; A compression processing unit (80) for compressing the classified image to generate a compressed file; An image file error checking unit 90 for checking an error of the compressed image file; And an image file storage unit 95 for storing the error-checked file in a storage medium.

Here, the vehicle information data unit 30 is connected to a GPS module for detecting the position and speed data of the vehicle, and a tilt sensor for detecting the impact of the vehicle or the tilt of the vehicle, and the image overlay unit ( 40 preferably stores image signals through the image grabbers 11 and 21 and vehicle information through the vehicle information data unit 30 for each image frame.

In addition, the image output unit 50 capable of directly outputting the image signal through the image overlay unit 40 and the data of the vehicle information data unit 30 input to the image overlay unit 40 are in text format. It is preferably configured to further include a driving data text storage unit 32 for storing as.

On the other hand, the image classification unit 70, the normal recording 71, the event recording 72 and the abnormal termination recording (73) for recovering the image file detected an error from the image file storage unit 95 The image file error checking unit 90 checks the last bit of the compressed file or checks the capacity of the image file to determine whether there is an error. The metadata stored in 60 may be requested to be retransmitted and restored.

In another aspect, the present invention, the image recording method using a vehicle image recording device, Image grabber step of digitizing the image taken by the camera (10, 20) mounted on the vehicle through the image grabber; An image overlay step of overlaying data of the sensors mounted on the vehicle and the image grabbed image; A queue storing step of temporarily storing the overlaid image in an image queue; A compression processing step of sequentially outputting the image files stored in the image queue to classify the images according to continuous recording and event recording, and performing compression processing on the classified image files; An error image file detection step of detecting a corrupted image file by checking a last bit or checking a capacity of a compressed image file; An error file retransmission request step of storing an image in the image file storage unit 95 and an image file in which an error is detected is regarded as an abnormally terminated image file and requesting retransmission of the corresponding file to the image queue unit. ; And a video file recovery step of recompressing the retransmitted video file through the compression processing unit and storing the re-transmitted video file in the video file storage unit 95.

Here, in the retransmission request step, it is preferable to call the metadata stored in the image queue unit to be retransmitted in a swap method.

As described above, according to the present invention, when the vehicle accident occurs, the accident occurrence state can be perfectly preserved as completely as possible, so that the cause of the accident can be clearly identified, and the accident treatment can be effectively performed.

Especially, even if the stored video file is damaged due to abnormal system shutdown due to the damage of the vehicle, the video of the stored file can be backed up at the same time so that the information on the accident can be obtained accurately and quickly, greatly increasing the reliability of the product. There is an effect that can be improved.

1 is a schematic configuration diagram of a vehicle video recording apparatus according to an embodiment of the present invention;
2 is a video recording screen using a video recording apparatus for a vehicle according to an embodiment of the present invention,
3 is a storage protocol of text data in a vehicle image recording apparatus according to an embodiment of the present invention;
4 is a list of image storage files stored in a vehicle video recording apparatus according to an embodiment of the present invention;
5 is a flowchart of a video recording method for a vehicle according to an embodiment of the present invention.

Hereinafter, a vehicle image recording apparatus and an image recording method according to the present invention will be described in detail with reference to the accompanying drawings.

1 is a schematic configuration diagram of a vehicle video recording apparatus according to an embodiment of the present invention, Figure 2 is a video recording screen using a vehicle video recording apparatus according to an embodiment of the present invention, Figure 3 is a view of the present invention 4 is a storage protocol of text data in a vehicle image recording apparatus, and FIG. 4 is a list of image storage files stored in a vehicle image recording apparatus according to an embodiment of the present invention.

5 is a flowchart of a video recording method for a vehicle according to an embodiment of the present invention.

In the drawings, the same reference numerals are given to the same elements even when they are shown in different drawings. In the drawings, the same reference numerals as used in the accompanying drawings are used to designate the same or similar elements. And detailed description of the configuration will be omitted. Also, directional terms such as "top", "bottom", "front", "back", "front", "forward", "rear", etc. are used in connection with the orientation of the disclosed drawing (s). Since the elements of the embodiments of the present invention can be positioned in various orientations, the directional terminology is used for illustrative purposes, not limitation.

According to an exemplary embodiment of the present invention, an image recording apparatus for a vehicle may include cameras 10 and 20 mounted on a vehicle to capture an image, and the cameras 10 and 20. Image grabbers (11, 21) for digitizing and outputting the image taken by the vehicle, a vehicle information data unit (30) for data output of the sensors connected to the sensors mounted on the vehicle and the vehicle information data unit ( 30) and an image overlay unit 40 for overlaying the data of the image grabbers 11 and 21, and an image queue unit 60 for temporarily storing the image signal of the image overlay unit 40; An image classification unit 70 for classifying the image output from the image cue unit 60, a compression processing unit 80 for generating the compressed file by compressing the classified image, and the compressed image file. Image file to check for errors And an error checking unit 90 and an image file storing unit 95 for storing the error-checked file in a storage medium.

The cameras 10 and 20 preferably include a front camera 10 for photographing the front of the vehicle and a rear camera 20 for photographing the rear of the vehicle. It may also comprise a plurality of cameras for further configuration.

The image grabber (11, 21) is an image device that digitizes the analog video signal appearing through the video medium of the camera (CCD) into a signal that can be processed by a personal computer (PC) by digitizing the defined bit per sample Also called a board.

The vehicle information data unit 30 converts the time, speed, and latitude of the vehicle into data, and converts the equalization state, tilt, and acceleration of the vehicle into data, and transmits the data to the video overlay unit 40. Here, the vehicle information data unit 30 is connected to the GPS module, the equalizer mounted on the vehicle, and each sensor to collect data of the vehicle. In addition, the present invention preferably detects the impact of the vehicle, it is preferable that the inclination sensor for detecting the inclination of the vehicle is connected.

The image overlay unit 40 stores image signals through the image grabbers 11 and 21 and vehicle information through the vehicle information data unit 30 for each image frame. That is, as shown in Figure 2, the image display unit 41 for displaying the video signal through the image grabber (11, 21) and the vehicle displaying the vehicle information through the vehicle information data unit 30 Preferably, the information units 42 and 43 and the image file storing unit 95 storing the edited image file are displayed on one screen.

Therefore, the front and rear of the vehicle and the vehicle information at that time can be checked at a glance through the screen stored in the image file storage unit 95 so that the situation analysis can be performed quickly and effectively.

On the other hand, the present invention preferably further comprises an image output unit 50 capable of directly outputting the image signal through the image overlay unit 40.

The video output unit 50 is preferably configured of a known liquid crystal display.

In addition, the present invention preferably further comprises a driving data text storage unit 32 for storing the data of the vehicle information data unit 30 input to the image overlay unit 40 in a text format.

As shown in FIG. 3, the driving data text storage unit 32 includes a start text (STX), length information (LEN), image classification content (CMD), substantial content data (DATA), and check bit (PARITY). It can be configured as.

Here, the substantial content data DATA includes a measurement date, time, position, speed, slope, acceleration, and equalizer state.

The image queue unit 60 lists and stores image signals output through the image overlay unit 40 for each frame. In other words, it is temporarily stored as FIFO (First Input First Out) and output to the image classifying unit 70. That is, each image frame is stored as metadata so that recovery is possible when an error occurs in the image file stored in the image file storage unit 95.

The image classification unit 70 is classified into a continuous recording 71 and an event recording 72 as is known. In addition, the present invention further configures the abnormal termination recording 73 so as to recover an image file in which an error is detected from the image file storage unit 95.

The compression processing unit 80 performs a function of compressing and storing the classified image files as is known.

The image file error checking unit 90 detects an error of the image file compressed and stored through the compression processing unit 80. That is, the last bit of the file (End of File) is checked or the capacity of the video file is checked. In other words, the abnormally terminated image file cannot detect the compressed image file because the last bit is not configured. In addition, even if the last bit is included, if there is no substantial video data, the capacity of the video file is not formed. Therefore, the video file without capacity is not played back.

4 illustrates a folder of a normal image 100 in which an image file is generally stored. The normally compressed image file 120 has a preview image and a predetermined capacity. However, the abnormally compressed file is displayed in a state without a preview image and a capacity like the image file 110.

Looking at the process of recovering when an error is detected in the image file error checker 90, the image file detected an error is fed back to the abnormal end recording 73 of the image classification unit 70, the file name is fed back Accordingly, the image queue unit 60 requests retransmission of the file.

The retransmitted image file is recompressed in the compression processing unit 80 through the abnormal end recording 72 and stored in the image file storage unit 95.

In this case, the image file stored in the image file storage unit 95 is generally stored as year, month, day_time (20111026_133032 (120 of FIG. 4)), and the metadata has a serial number added to the image file. It is added and stored (20111026_133032-001). Therefore, when an error is detected in the video file, the metadata of the image queue unit 60 can be easily requested through the video file name.

In other words, the metadata stored in the image queue unit 60 is called to perform recompression using a swap method. Therefore, the backup data recovery function in case of an accident can be completely preserved.

The image file storage unit 95 stores image files for which no errors are detected through the image file error checking unit 90 for each classified folder.

An image recording method using the vehicle image recording apparatus of the present invention configured as described above will be described with reference to FIGS. 1 to 5.

An image is taken through the cameras 10 and 20 mounted on the vehicle (S10). Thereafter, an image grabber S12 is performed to digitize the captured image, and the data of each sensor mounted on the vehicle is overlaid with the image grabbed image (S14).

The image overlaid with the data of the image and the sensor value is output through the image output device and temporarily stored in the image queue (S16).

The image files stored in the image queue are sequentially output to classify the images by continuous recording and event recording (S18), and compression processing is performed on the classified image files (S20).

A damaged image file is detected by checking the last bit (End Of File) or capacity of the compressed image file (S22). An image file without errors is stored in the image file storage unit 95 (S24), and the image file detected as an error is regarded as abnormally terminated image file and fed back to the image classification unit 70 (S30). .

Looking at the process of recovering when an error is detected in the image file error checker 90, the image file detected an error is fed back to the abnormal end recording 73 of the image classification unit 70, the file name is fed back Accordingly, the image queue unit 60 requests retransmission of the file.

The retransmitted image file is recompressed in the compression processing unit 80 through the abnormal end recording 72 and stored in the image file storage unit 95.

In this case, the image file stored in the image file storage unit 95 is generally stored in a file name having a format of year, month, day, and time (20111026_133032), and the error file cannot be reproduced. Is stored with no last bit or no capacity. Accordingly, the image file error checking unit 90 requests the image queue unit 60 to retransmit the corresponding file for the file in which the error is detected (S32).

When the metadata stored in the image queue unit 60 is retrieved, the abnormal termination recording 72 unit of the image classification unit 70 calls the metadata stored in the image queue unit 60 to perform recompression by a swap method. Done. Therefore, the backup data recovery function in case of an accident can be completely preserved.

The embodiments of the present invention described above and shown in the drawings should not be construed as limiting the technical idea of the present invention. The scope of protection of the present invention is limited only by the matters described in the claims, and those skilled in the art will be able to modify the technical idea of the present invention in various forms. Accordingly, such improvements and modifications will fall within the scope of the present invention if they are apparent to those skilled in the art.

10, 20: camera 11, 21: image grabber
30: vehicle information data unit 31: driving data
32: driving data text storage unit 40: video overlay unit
50: video output unit 60: image cue
70: Video classification unit 71: Always recording
72: Event recording 73: Abnormal end recording
80: compression processing unit 90: video file error checker
95: video file storage

Claims (6)

Cameras 10 and 20 mounted on a vehicle to capture an image;
An image grabber (11, 21) for digitizing and outputting an image captured by the camera (10, 20);
A vehicle information data unit 30 connected to a plurality of sensors mounted on the vehicle to data output values of the sensors;
An image overlay unit 40 for overlaying the data of the vehicle information data unit 30 and the image grabbers 11 and 21;
An image queue unit 60 for temporarily storing an image signal of the image overlay unit 40;
An image classification unit 70 for classifying an image output from the image cue unit 60;
A compression processing unit (80) for compressing the classified image to generate a compressed file;
An image file error checking unit 90 for checking an error of the compressed image file; And
And an image file storage unit (95) for storing the error-checked file in a storage medium.
The method according to claim 1,
The vehicle information data unit 30 is connected to a GPS module for detecting the position and speed data of the vehicle, a tilt sensor for detecting the impact of the vehicle or the tilt of the vehicle,
The video overlay unit (40) stores the video signal through the image grabber (11, 21) and the vehicle information through the vehicle information data unit (30) for each image frame.
The method according to claim 1 or 2,
The image output unit 50 capable of directly outputting the image signal through the image overlay unit 40 and the data of the vehicle information data unit 30 input to the image overlay unit 40 are stored in a text format. Vehicle image recording device further comprises a driving data text storage unit 32 for.
The method according to claim 1,
The image classification unit 70 includes an abnormal termination recording 73 for restoring an image file in which an error is detected from the continuous recording 71, an event recording 72, and the image file storage unit 95,
The video file error checking unit 90 checks an end of file of the compressed file or checks the capacity of the video file to determine whether there is an error.
The image file of which the error is detected is restored by requesting retransmission of metadata stored in the image queue unit (60).
In the video recording method using a video recording apparatus for a vehicle,
An image grabber step of digitizing an image captured by the cameras 10 and 20 mounted on the vehicle through an image grabber;
An image overlay step of overlaying data of the sensors mounted on the vehicle and the image grabbed image;
A queue storing step of temporarily storing the overlaid image in an image queue;
A compression processing step of sequentially outputting the image files stored in the image queue to classify the images according to continuous recording and event recording, and performing compression processing on the classified image files;
An error image file detection step of detecting a corrupted image file by checking a last bit or checking a capacity of a compressed image file;
An error file retransmission request step of storing an image in the image file storage unit 95 and an image file in which an error is detected is regarded as an abnormally terminated image file and requesting retransmission of the corresponding file to the image queue unit. ;
And a video file recovery step of recompressing the retransmitted image file through a compression processing unit and storing the re-transmitted image file in the image file storage unit (95).
The method according to claim 5,
The retransmission request step, the video recording method for a vehicle, characterized in that the re-transmission by calling the metadata stored in the image queue unit.

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