KR101007247B1 - Video recording device and method - Google Patents

Abstract

Disclosed are an image storage device and an image storage method. An image recording apparatus according to the present invention includes a temporary storage unit for temporarily storing image data corresponding to an input image; A permanent storage unit for moving and temporarily storing image data temporarily stored in the temporary storage unit; And when it is recognized that the driving power of the video recording apparatus is supplied by the auxiliary power supply unit, the image data temporarily stored in the temporary storage unit is permanently stored even if one or more of a predetermined data size condition and a predetermined moving storage time condition are not satisfied. It may include a control unit for processing to be moved to the storage. According to the present invention, even when the power input to the video recording device is abnormally cut off, it is possible to prevent damage to data being recorded or stored.

Power, video, recording, battery

Description

Video recording device and video recording method {Video recording device and method}

The present invention relates to an image storage device and a storage method thereof.

As automobiles become a necessity of life, side effects such as parking problems, traffic problems, and traffic accidents are increasing.

In particular, traffic accidents may be resolved smoothly according to agreement between the parties, but if the judgment of negligence is ambiguous, agreement between the parties may not be easily achieved. .

Therefore, the necessity of handling traffic accidents based on objective data is urgently needed, and in consideration of such necessity, various methods that can be used as objective data when handling accidents by actually mounting a device such as a black box of an aircraft in a vehicle are developed. It is becoming.

The vehicle black box system currently being developed mainly uses a camera to record and store image data of the surroundings of the vehicle. In addition, a method of additionally recording and storing voice in an accident situation and driving information of various vehicles has been developed. The recorded driving information may include information such as the speed of the vehicle and the steering angle.

BACKGROUND ART A vehicle black box system including an image recording apparatus generally processes an image photographed by a camera by using power supplied from a vehicle battery and stores the image in a storage medium. The storage medium stores information such as an image photographed while the vehicle is driving. However, due to the limited storage capacity of the storage medium, the shock sensor detects the impact on the vehicle and / or the manner in which the captured image is stored in a storage medium such as a nonvolatile memory when an event is input by a user's manual operation. For example, a method of allowing an image captured by an event generated when a vehicle accident is recognized to be stored in a storage medium has been proposed.

1 is a view schematically showing the configuration of a video recording data processing apparatus of a vehicle according to the prior art.

Referring to FIG. 1, when the ignition is turned on, the first switch 1 of the power supply unit 50 is turned on, and the vehicle power of the vehicle battery 20 detects an impact amount applied to the vehicle. 70) and a liquid crystal display 80 for displaying a recorded image, and are rectified through the rectifying diode 55 and then supplied to the image recording apparatus 60.

On the other hand, the NAND gate 51 receiving the start-on detection signal turns on the second switch 53. Accordingly, the auxiliary power charged in the rechargeable battery 54 (not shown) can be supplied through the second switch 53 and the rectifier diode 56. The voltage of the auxiliary power is set lower than that of the vehicle power, so that video recording is actually performed. It is not supplied to the device 60. After that, when the vehicle is powered off when the first switch 52 is turned off, the auxiliary power of the rechargeable battery is supplied to the video recording device 60.

The power monitoring unit 40 includes a voltage divider Ra and a Zener diode Da for dividing the vehicle power by connecting one end of the other end to the ground side between the first switch 52 and the rectifier diode 55. And the divided voltage is applied to the video recording device 60.

The image recording apparatus 60 includes a video decoder, an image data processor, a video encoder, a keypad, a clock generator for recording an image taken through the photographing unit 90 and playing a recorded image, and temporarily storing the recorded image. And a second memory for storing a part of the recorded video temporarily stored in the first memory.

The first memory is a volatile memory (SDRAM), and the second memory uses a NAND flash memory as a nonvolatile memory capable of preserving recorded video without a vehicle power supply and an auxiliary power supply. The second memory transmits the recorded video to the computer by communicating through the USB interface unit.

The video recording device 60 is supplied with vehicle power or auxiliary power. The video recording device 60 temporarily stores the captured video in the first memory to record the video taken while the vehicle power is supplied. In order to secure the data, a part of the image temporarily stored in the first memory is downloaded to the second memory and moved. That is, the first memory temporarily stores the recently photographed image according to a first-in first-out (FIFO) method, and if the storage capacity exceeds the storage capacity, the first memory continuously deletes the stored image and then temporarily stores the newly captured image. . Then, when the start-up occurs, a predetermined size of the captured image is downloaded to the second memory from the start-off of the temporarily stored captured image.

The second memory includes an area for storing the captured image of a predetermined capacity only when the shock sensor 70 or the operation of the event key provided on the keypad, and stores the captured image of the predetermined capacity downloaded from the first memory Save it.

In addition, when the video recording device 60 completes the operation of downloading the recorded video to the second memory, the video recording device 60 applies the download completion signal to the NAND gate 51. At this time, the NAND gate 51 turns off the second switch 53 to block the auxiliary power.

However, the recording data image processing apparatus according to the prior art has to detect whether the start-up in order to detect whether the main power is cut off, and there is a problem in that there is a complicated processing structure for turning on / off the switch.

In addition, according to the prior art, there is a possibility that the system is turned off momentarily and the information in the volatile memory is lost when a time difference occurs while the power is detected or the start is detected and the auxiliary power is switched on. .

In addition, the voltage detection method of the auxiliary power supply of the prior art requires the use of a filter to reduce noise in the process of detecting the power supply, and also detects whether the voltage is lowered below a certain level, so that the power supply is recognized late. There is also a problem.

The present invention provides an image storage device and an image storage method capable of preventing damage to data being recorded or stored when main power input to the image recording device is abnormally cut off.

In addition, the present invention is to provide an image storage device and an image storage method capable of safely finishing the ongoing recording and storage of data by notifying the image storage unit of abnormal cutoff of the power supply and activation of the auxiliary power supply.

In addition, the present invention is to provide an image storage device and an image storage method that can be implemented with a simple processing structure does not need to detect whether the start-up (on) to detect whether the main power is cut off.

In addition, the present invention is to provide an image storage device and an image storage method that can determine whether the external power is cut off by measuring the voltage of the auxiliary power source and the remaining amount of the auxiliary power source can be measured.

In addition, an object of the present invention is to provide an image storage device and an image storage method capable of effectively processing an emergency event by allowing a spare time for emergency processing to be recognized in advance by measuring a residual amount of auxiliary power.

Other objects of the present invention will be readily understood through the following description.

According to an aspect of the present invention, there is provided an image recording apparatus for generating and storing image data.

 According to an embodiment of the present invention, an image recording apparatus having an auxiliary power supply includes: a temporary storage unit for temporarily storing image data corresponding to an input image; A permanent storage unit for moving and temporarily storing image data temporarily stored in the temporary storage unit; And when it is recognized that the driving power of the video recording apparatus is supplied by the auxiliary power supply unit, the image data temporarily stored in the temporary storage unit is stored even if one or more of a predetermined data size condition and a predetermined moving storage time condition are not satisfied. It may include a control unit for processing to be moved to the permanent storage.

The video recording apparatus may further include a measuring unit configured to input a measurement value measuring the voltage and the temperature of the auxiliary power supply unit to the controller. Here, the controller may estimate the remaining amount of the auxiliary power supply unit according to the measured value by using the stored characteristic information.

The controller may determine whether to move additionally stored image data additionally stored in the temporary storage unit to the permanent storage unit with reference to the estimated remaining amount.

The controller may determine that power is supplied by the auxiliary power supply unit when the voltage reduction of the auxiliary power supply unit is recognized by the measurement values sequentially input from the measurement unit.

The video recording apparatus may further include a rectifying diode to prevent the current supplied from the auxiliary power supply unit from flowing into the vehicle power supply unit, which is an external power source.

The video recording apparatus may further include a transformer for reducing the voltage of the power input from the vehicle power supply unit to the driving voltage of the video recording apparatus.

The auxiliary power supply unit may include an electric device that is charged by the supply of the external power.

The image recording apparatus may further include an encoder configured to generate image data by encoding image information corresponding to the input image.

The video recording apparatus may further include an event detector configured to generate and output a sensing signal. Here, the controller may determine whether a predetermined event occurs using the sensing signal.

The event detector may include one or more of an acceleration sensor, a vibration sensor, and an angular velocity sensor.

The permanent storage unit includes a plurality of divided storage areas respectively allocated to an always-recorded data storage area, an event-recorded data storage area, and an emergency-recorded data storage area, wherein driving power of the video recording device is supplied by the auxiliary power supply unit. When the image data is recognized, the image data stored in the temporary storage unit may be moved and stored in the emergency recording data storage area.

According to another aspect of the present invention, there is provided a video recording method performed in the video recording apparatus and / or a recording medium on which a program for performing the video recording method is recorded.

According to an embodiment of the present invention, an image recording method performed by an image recording apparatus includes: (a) storing image data corresponding to an input image in a temporary storage unit; (b) determining whether power is supplied from the auxiliary power source; And (c) when power is supplied from the auxiliary power supply unit, the image data temporarily stored in the temporary storage unit is moved and stored to the permanent storage unit even if one or more of a predetermined data size condition and a predetermined moving storage time condition are not satisfied. It may include the step.

The step (b) may include receiving a measurement value in which the voltage and temperature of the auxiliary power supply unit are measured; And determining whether the voltage of the auxiliary power supply unit is reduced than before by referring to the measured value. Here, when it is determined that the voltage is reduced, it may be determined that power is supplied from the auxiliary power supply.

When it is determined that power is supplied from the auxiliary power supply unit, the method may further include estimating a residual amount of the auxiliary power supply unit based on the measured value using previously stored characteristic information. In addition, the remaining amount may be estimated as the remaining time, for example.

With reference to the estimated remaining amount, it may be further determined whether to store additionally stored image data additionally stored in the temporary storage unit to the permanent storage unit.

Image information corresponding to the input image may be encoded and generated as the image data.

Whether or not an event occurs may be recognized by analyzing a sensing signal input from the event detector. The event detector may include one or more of an acceleration sensor, a vibration sensor, an angular velocity sensor, and the like.

The permanent storage unit includes a plurality of divided storage areas respectively assigned to an always-recorded data storage area, an event-recorded data storage area, and an emergency-recorded data storage area, wherein driving power of the video recording device is supplied by the auxiliary power supply. If it is determined that the image data stored in the temporary storage unit may be stored in the emergency recording data storage area.

According to an embodiment of the present invention, when the main power input to the video recording device is abnormally cut off, it is possible to prevent damage to data being recorded or stored.

In addition, by notifying the video storage unit of abnormal cut-off of the power supply and activation of the auxiliary power supply, there is an effect of safely finishing the ongoing recording and data storage.

In addition, since it is not necessary to detect whether the main power is on or off, it can be implemented with a simple processing structure, and since the detection of the external power is not required, the noise from the outside of the system is less affected. There is also an effect that does not require a noise protection circuit for power detection (startup detection).

In addition, it is possible to determine whether the external power is cut off by measuring the voltage of the auxiliary power source, and there is an effect of measuring the remaining amount of the auxiliary power source.

In addition, by measuring the remaining amount of the auxiliary power to recognize the spare time for the emergency (emergency) in advance, there is an effect that can be effective emergency event processing.

In addition, even when the vehicle is turned off, video recording can be performed additionally (as much as the remaining power of the auxiliary power supply).

In addition, the storage area in which the image data is stored may be classified into a continuous recording, an event recording, a power-off recording, and the like, thereby easily managing the storage data.

As the invention allows for various changes and numerous embodiments, particular embodiments will be illustrated in the drawings and described in detail in the written description. However, this is not intended to limit the present invention to specific embodiments, it should be understood to include all transformations, equivalents, and substitutes included in the spirit and scope of the present invention. In the following description of the present invention, if it is determined that the detailed description of the related known technology may obscure the gist of the present invention, the detailed description thereof will be omitted.

The terms first, second, etc. may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another.

The terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting of the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this application, the terms "comprise" or "having" are intended to indicate that there is a feature, number, step, operation, component, part, or combination thereof described in the specification, and one or more other features. It is to be understood that the present invention does not exclude the possibility of the presence or the addition of numbers, steps, operations, components, components, or a combination thereof.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

2 is a diagram schematically illustrating a configuration of an image recording apparatus according to an embodiment of the present invention.

Referring to FIG. 2, the image recording apparatus 210 includes a power supply unit 215 and an image storage unit 220.

The power supply unit 215 is a means for supplying power necessary for the operation of the image storage unit 220. The operation and function of the power supply unit 215 will be described later with reference to FIG. 3.

The image storage unit 220 may include an event detector 230, a program storage unit 235, an image input unit 240, an encoding / decoding unit 245, a first storage unit 250, and a second storage unit 255. , A display unit 260, an input unit 270, and a control unit 275.

The event detector 230 generates a sensing signal for detecting whether a predetermined event (eg, a contact accident, a collision accident, a rollover accident, or the like) has occurred and provides the sensing signal to the controller 275. The event detector 230 may include, for example, at least one of an acceleration sensor, a vibration sensor, an angular velocity sensor, and the like for generating a sensing signal. The controller 275 may determine whether an event occurs by interpreting an input sensing signal.

The program storage unit 235 is a means for storing a program for driving the image recording apparatus 210 and / or the image storage unit 220. The program storage unit 235 may store, for example, software for the operation of the control unit 275. The program storage unit 235 may be implemented as storage means integrated with one or more of the first storage unit 250 and the second storage unit 255.

The image input unit 240 generates and outputs an image signal corresponding to the input external image. The image input unit 240 may include, for example, one or more of a lens, an image sensor, an image signal processor (ISP), and the like.

The encoding / decoding unit 245 encodes image data generated by encoding image information corresponding to the image signal input from the image input unit 240 to one or more of the first storage unit 250 and the second storage unit 255. The image data stored in the first storage unit 250 or the second storage unit 255 may be decoded and displayed on the display unit 260. The encoding / decoding unit 245 may be separately implemented as an encoding unit which performs an encoding function and a decoding unit which performs a decoding function. In addition, as will be described later, the image data is stored in the first storage unit 250 and then the second unit for each predetermined time unit or predetermined data size unit under the control of the controller 275 or / and the encoding / decoding unit 245. The storage unit 255 may be moved and stored.

The first storage unit 250 is a storage space for temporarily storing image data processed by the encoding / decoding unit 245. The first storage unit 250 may be implemented with, for example, a volatile memory such as SRAM, SDRAM, or DDR.

The second storage unit 255 is a storage space for moving and temporarily storing image data temporarily stored in the first storage unit 250. Here, the permanent storage means that the corresponding image data is stored in the second storage unit 255 when the deletion according to the intention of the user or the random deletion due to the error cause of the second storage unit 255 does not occur. it means. The second storage unit 255 may be implemented with, for example, a nonvolatile memory such as NAND FLASH, NOR FLASH, SD CARD, MMC CARD, CF CARD, or the like.

The first and second terms for distinguishing the first storage unit 250 and the second storage unit 255 described above are not intended to form a name of the storage unit, but for distinguishing the storage units that perform a similar function. Used for the purpose. Accordingly, the first storage unit 250 may be referred to, for example, a temporary storage unit, and the second storage unit 255 may be referred to, for example, a permanent storage unit.

The display unit 260 outputs, as visual information, one or more of an operation state of the image recording apparatus 210, a power supply state by the power supply unit 215, image data decoded by the encoding / decoding unit 245, and the like. .

The input unit 270 is a means for receiving a user manipulation command. The input unit 270 may include, for example, one or more of a mechanical key button, a touch sensor, an infrared remote control receiver, and the like. When the display unit 260 is implemented as a touch sensitive screen, the display unit 260 and the input unit 270 may be integrated with each other.

The controller 275 determines whether an event is detected by using a sensing signal input from the event detector 230, and determines whether power is supplied by the auxiliary power supply 350 of the power supply unit 215. Control to perform the corresponding operation. In addition, the above-described components are controlled to perform the designated function.

3 is a diagram schematically illustrating a configuration of a power supply unit according to an embodiment of the present invention.

In the present embodiment, the driving power supply for the video recording device 210 is not normally supplied from the vehicle power supply unit 200, or the voltage of the driving power supplied from the vehicle power supply unit 200 is lower than that of the auxiliary power supply unit 350. In the case of losing, the driving power is supplied from the auxiliary power supply unit 350 and the image storage unit 220 can recognize the driving power. Here, the vehicle power supply unit 200 may be at least one of a vehicle battery, a vehicle generator, and the like.

For example, the video recording apparatus 210 may receive a driving power from the vehicle power supply unit 200 by connecting a power terminal to a cigar jack in the vehicle. However, when the power terminal connected to the cigar jack is detached or abnormally flows, the video recording device 210 may recognize as an emergency state in which normal power supply is not made. In addition, even when the voltage of the driving power flowing from the vehicle power supply unit 200 becomes lower than the voltage of the auxiliary power supply unit 350 due to the discharge of the vehicle power supply unit 200, the video recording device 210 may recognize the emergency state. have. As such, when the video recording apparatus 210 recognizes that an emergency condition has occurred, fast and safe processing of video data stored in the first storage unit 250 or being processed by the encoding / decoding unit 245 is required. .

Hereinafter, with reference to FIG. 3, the structure, function, etc. of the power supply unit 215 are demonstrated.

Referring to FIG. 3, the power supply unit 215 may include a rectifier diode 310, a transformer 320, a power supply 330, a switching unit 340, an auxiliary power supply 350, and a measurement unit 360. It may include. All of the illustrated components may not be essential components, and one or more components (eg, the transformer 320 and the like) may be omitted.

When power is supplied from the rectifier diode 310 auxiliary power supply unit 350, power is not leaked to the outside, and the system is protected even when the power supply polarity of the vehicle power supply unit 200 is supplied with reverse voltage due to a user mistake. do.

The transformer 320 may have a voltage level higher than that of the video recording device 210 when the level of the voltage supplied from the vehicle power supply unit 200 is high (for example, the operating power of the video recording device is 5V and the supply power is 12V). Or 24V, etc.), the voltage is reduced to the operating power supply level of the video recording device 210 and processed to be constantly supplied at the reduced voltage level.

The power supply unit 330 is a means for supplying power required by the image recording apparatus 210 and / or the image storage unit 220 to operate. The power supply 330 may be a tangible component or a conceptual component.

When the power supply unit 350 normally receives power from the vehicle power unit 200 in a short state, the switching unit 340 charges the auxiliary power unit 350 using the power supply unit 350. If the power supply unit 200 does not normally supply power, Power is supplied from the auxiliary power supply 350. In addition, the switching unit 340 is switched to the open state under the control of the control unit 275 when the user inputs an operation termination command while the power supply by the auxiliary power supply unit 350 is performed, and thus the image recording apparatus 210 is provided. Do not supply drive power to the power supply (power off). Of course, the switching unit 340 may be omitted so that the corresponding section is always kept in a short state, and the power cut may be processed in software by the operation of the controller 275.

The auxiliary power supply 350 is a means for supplying the operating power of the video recording apparatus 210 when the normal power supply is not supplied from the vehicle power supply 200. The auxiliary power supply 350 may be implemented by, for example, one or more of a capacitor, a rechargeable battery, a non-rechargeable battery, and the like.

The measurement unit 360 measures the state of the auxiliary power supply unit 350 and provides the measured information to the control unit 275. For example, the measurement unit 360 may measure one or more of the voltage, temperature, and the like of the auxiliary power supply unit 350. The measurement unit 360 may include, for example, one or more of an analog-to-digital converter (ADC), a voltage detector, a comparator, and the like for voltage measurement, and may include, for example, a temperature sensor for temperature measurement. The controller 275 determines whether the driving power provided by the power supply unit 215 is provided from the vehicle power supply unit 200 or the auxiliary power supply unit 350 using the information provided by the measurement unit 360. If it is supplied from the auxiliary power supply unit 350, it may be recognized as an emergency state and controlled so that rapid processing is performed.

4 is a diagram illustrating a capacity change graph for each temperature of the auxiliary power supply unit according to an embodiment of the present invention.

As described above, the auxiliary power supply 350 may be implemented as a battery, a high capacity capacitor, or the like, and these are electric devices having a large capacity change according to the ambient temperature, and have characteristics as illustrated in the graph of FIG. 4.

If the capacity table according to the temperature and voltage is prepared in advance by using the illustrated characteristic graph and stored in an arbitrary storage unit (for example, the program storage unit 235), the control unit 275 is controlled by the measurement unit 360. The remaining amount of power supplied by the auxiliary power supply unit 350 may be estimated with reference to the measured information (ie, voltage and temperature). Accordingly, the controller 275 may determine a time point such as encoding image data and / or processing image data stored in the first storage unit 250 according to the estimated remaining amount.

However, since the characteristic graph may vary from device to device and from manufacturer to manufacturer, it may be necessary to provide a table for at least one of the property data of the device to be used and applied or the property data that can be used universally.

5 is a diagram illustrating an image data storage structure of the first and second storage units according to an embodiment of the present invention.

The first storage unit 250 is a storage area in which image data encoded by the encoding / decoding unit 245 is temporarily stored using the image signal output from the image input unit 240. The video data stored in the first storage unit 250 is always / event-recorded video data and video data at the power-off time (for example, encoding / Image data being processed by the decoding unit 245 or remaining in the first storage unit 250 without being moved to and stored in the second storage unit 255, or additionally stored image data (for example, Video data that is additionally stored after moving and storing the video data).

As illustrated in FIG. 5, the second storage unit 255 may be divided into three storage areas so that image data of the first storage unit 250 may be moved and stored. The process of moving and storing the image data of the first storage unit 250 to the second storage unit 255 may be performed by the control of the controller 275 and / or the encoding / decoding unit 245. When the storage space of each area of the second storage unit 255 is full, for example, the oldest data may be deleted to secure the storage space.

The video data stored in the first storage unit 250 in a state where power is normally supplied from the vehicle power supply unit 200 is stored in the always-recorded data storage area 501 or the event-recorded data storage area 502 of the second storage unit 255. To be stored. That is, when the image data stored in the first storage unit 250 is always recorded image data according to a result of determining whether an event occurs in the controller 275, the controller 275 is moved to the always recorded data storage area 501 and stored. If the image data stored in 250 is event recording image data, the image data is moved and stored in the event recording data storage area 502.

However, when normal power is not supplied from the vehicle power supply unit 200 and operation power is supplied from the auxiliary power supply unit 350, the image data stored in the first storage unit 250 may be recorded in the emergency state recording data storage area 503. To be saved. In addition, image data stored in the first storage unit 250 after the movement storage is also stored in the emergency recording data storage area 503.

Thereafter, after the normal power supply is resumed from the vehicle power supply unit 200, the controller 275 constantly records the image data stored in the emergency recording data storage area 503 with reference to the event occurrence history, or the event. The recording data storage area 502 may be moved and stored.

6 and 7 are flowcharts illustrating an image storing method of an image storing apparatus according to an exemplary embodiment.

Referring to FIG. 6, when power is supplied from the vehicle power supply unit 200 (step 610), the image recording apparatus 210 proceeds to step 620 to start the operation of the image storage unit 220. The vehicle power supply unit 200 may be, for example, one or more of a vehicle battery, a vehicle generator, and the like, and the image recording device 210 and / or the image storage unit 220 may be started to be driven by a user's operation start command, for example. Can be. In addition, the auxiliary power supply 350 may be charged by the power supply of step 610.

In operation 630, the encoding / decoding unit 245 of the image storage unit 220 stores the image data generated by encoding the image information input from the image input unit 240 in the first storage unit 250. The image data stored in the first storage unit 250 is moved to the second storage unit 255 for each predetermined time unit and / or the predetermined data size unit by the processing of the control unit 275 or / and the encoding / decoding unit 245. Will be saved.

In operation 640, the measuring unit 360 provides the control unit 275 with the measured value obtained by measuring the voltage of the auxiliary power supply unit 350.

In operation 650, the controller 275 determines whether the event is an event by using a sensing signal input from the event detector 230.

If it is not the event situation, the process proceeds to step 660 such that the image data stored in the first storage unit 250 is moved and stored in the always-recorded data storage area 501 of the second storage unit 255.

However, if it is an event situation, the process proceeds to step 670 so that the image data stored in the first storage unit 250 is moved and stored in the event recording data storage area 502 of the second storage unit 255.

As described above, steps 660 and 670 may not be performed immediately after the event occurrence determination by the controller 275, but may be performed every predetermined time unit and / or every predetermined storage data size.

In operation 680, the measuring unit 360 provides the control unit 275 with a measured value obtained by measuring the voltage of the auxiliary power supply unit 350.

In operation 690, the controller 275 determines whether the auxiliary power supply voltage is lower than or equal to the set value. Here, the set value is a reference voltage value that is set in advance to determine whether the charging is performed to the extent that the power supply by the auxiliary power supply unit 350 is possible (that is, it can function as an auxiliary power supply).

If it is determined that the charging is not performed to the extent that the auxiliary power supply 350 can function as the auxiliary power, the process returns to step 620.

However, if it is determined by the auxiliary power supply unit 350 that the charging is enough to function as an auxiliary power source, the process proceeds to step 710.

In operation 710, the controller 275 determines whether the voltage value measured in operation 680 is lower than the voltage value measured in operation 640. If there was no decrease in voltage value, the process proceeds to step 620 again.

However, if it is determined that the power supply by the auxiliary power supply unit 350 is performed if the voltage value is reduced, the control unit 275 is additionally provided from the measuring unit 360 to perform the video recording process in the emergency state. The remaining amount capable of supplying power by the auxiliary power supply 350 is estimated by using the ambient temperature of the auxiliary power supply 350 and the previously stored capacity table.

In operation 730, the image data stored in the first storage unit 250 is moved and stored in the emergency recording data storage area 503 of the second storage unit 255. That is, even if the size of the image data stored in the first storage unit 250 and / or the time unit designated for movement storage of the image data in step 730 is less than or equal to the predetermined size unit, the second storage may be performed to preserve the image data. It is moved to and stored in the unit 255.

In operation 740, the controller 275 determines whether additional storage of image data is possible by referring to the estimated remaining amount of the auxiliary power supply 350 (eg, additional storage time).

If additional storage is possible, the process proceeds to step 730 where the image data processed by the encoding / decoding unit 245 and stored in the first storage unit 250 is stored in the emergency recording data storage area of the second storage unit 255 ( Move to 503).

However, if additional storage is not possible, the control unit 275 proceeds to step 750 to end the file stored in the emergency recording data storage area 503 (that is, the end of the moving storage).

Subsequently, in step 760, the controller 275 stops the power supply to the image storage unit 220 by controlling the switching unit 340 to be opened to end the driving of the image recording apparatus 210. Of course, the driving termination of the video recording apparatus 210 may be performed by software processing by the controller 275 without manipulation of the switching unit 340.

Obviously, the above-described image storage method may be performed by an automated procedure according to a time series sequence by a software program or the like embedded in the image recording apparatus. Codes and code segments constituting the program can be easily inferred by a computer programmer in the art. In addition, the program is stored in a computer readable media, and read and executed by a computer to implement the method. The information storage medium includes a magnetic recording medium, an optical recording medium, and a carrier wave medium.

Although the above has been described with reference to embodiments of the present invention, those skilled in the art may variously modify the present invention without departing from the spirit and scope of the present invention as set forth in the claims below. And can be changed.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a diagram schematically showing the configuration of a recorded video data processing apparatus for a vehicle according to the prior art.

2 is a diagram schematically illustrating a configuration of an image recording apparatus according to an embodiment of the present invention.

3 is a view schematically showing a configuration of a power supply unit according to an embodiment of the present invention.

4 is a diagram illustrating a capacity change graph for each temperature of the auxiliary power supply unit according to an embodiment of the present invention.

5 is a diagram illustrating an image data storage structure of the first and second storage units according to an embodiment of the present invention.

6 and 7 are flowcharts illustrating an image storing method of an image storing apparatus according to an exemplary embodiment of the present invention.

Claims (21)

In the video recording device having an auxiliary power supply, A measuring unit generating and outputting a measured value measuring the voltage and temperature of the auxiliary power supply unit; A temporary storage unit for temporarily storing image data corresponding to the input image; A permanent storage unit for moving and temporarily storing image data temporarily stored in the temporary storage unit; And If it is determined that the voltage of the auxiliary power supply unit is reduced from the previously measured voltage with reference to the measured values sequentially input from the measuring unit, the temporary power supply unit does not satisfy at least one of a predetermined data size condition and a predetermined moving storage time condition. After processing the image data at the time of the power-off time temporarily stored in the storage unit to the permanent storage unit to be stored and stored, and by using the pre-stored characteristic information to estimate the remaining power supply of the auxiliary power supply unit according to the measured value And a controller configured to process the additional stored image data to be moved and stored in the permanent storage unit when it is determined that the additional stored image data stored in the temporary storage is stored in the permanent storage unit. delete delete delete The method of claim 1, And a rectifying diode for preventing current supplied from the auxiliary power supply unit from flowing into the vehicle power supply unit, which is an external power source. The method of claim 5, And a transformer for reducing the voltage of the power input from the vehicle power supply unit to the driving voltage of the video recording apparatus. The method of claim 5, And the auxiliary power supply unit includes an electric element charged by the external power supply. The method of claim 1, And an encoder for encoding the image information corresponding to the input image to generate the image data. The method of claim 1, Further comprising an event detector for generating and output the sensing signal, And the controller determines whether a predetermined event occurs using the sensing signal. 10. The method of claim 9, And the event detecting unit comprises at least one of an acceleration sensor, a vibration sensor, and an angular velocity sensor. The method of claim 1, The permanent storage unit includes a plurality of divided storage areas each allocated to an always recording data storage area, an event recording data storage area, and an emergency recording data storage area. And after it is determined that the voltage of the auxiliary power supply unit is lower than the previously measured voltage, the video data stored in the temporary storage unit is moved and stored in the emergency recording data storage area. An image storing method performed in an image recording apparatus having an auxiliary power supply, Storing image data corresponding to the input image in a temporary storage unit; Determining whether a voltage of the auxiliary power supply is lower than a previously measured voltage by referring to a measurement value generated by measuring a voltage and a temperature of the auxiliary power supply by a measurement unit; If it is determined that the reduction is reduced, even if one or more of a predetermined data size condition and a predetermined movement storage time condition is not satisfied, processing to move and store the image data at the time of power off temporarily stored in the temporary storage unit to the permanent storage unit. ; Determining whether additional storage image data stored in the temporary storage unit can be additionally moved and stored in the permanent storage unit by estimating the remaining amount of power supply of the auxiliary power unit based on the measured value using previously stored characteristic information; And And if it is determined that additional movement storage is possible, processing the movement of the additional storage image data to the permanent storage unit. The method of claim 12, The remaining amount is estimated by the remaining time. delete delete delete The method of claim 12, And image information corresponding to the input image is encoded and generated as the image data. The method of claim 12, And detecting the event by analyzing the sensing signal input from the event detector. The method of claim 18, And the event detecting unit comprises at least one of an acceleration sensor, a vibration sensor, and an angular velocity sensor. The method of claim 12, The permanent storage unit includes a plurality of divided storage areas each allocated to an always recording data storage area, an event recording data storage area, and an emergency recording data storage area. And after it is determined that the voltage of the auxiliary power supply unit is lower than the previously measured voltage, the video data stored in the temporary storage unit is moved and stored in the emergency recording data storage area. A program of instructions that can be executed by a digital processing apparatus for performing the video recording method according to any one of claims 12 to 13 and 17 to 20 is tangibly implemented and read by the digital processing apparatus. Record carrier that records possible programs.

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