KR101065552B1 - Small-sized prtable multichannel cctv monitoring apparatus - Google Patents

Abstract

The present invention relates to a method for storing an image on a memory card in a micro CCTV monitoring apparatus. (A) A file is stored in a FAT area and a ROOT directory area of a memory card connected to the micro CCTV device in a process of initializing a memory card. Recording the name and location of the file only once in FAT allocation; (b) a memory area is composed of at least one sector, and each memory block is divided into a spread index and a data area of a predetermined size, and the spread index is divided into the file system area ( It is linked with the FAT area and the ROOT directory area, and contains index information (including index ID (index address) for each allocated data block and indicates correlation with adjacent data blocks at any position). A size, a compression method of an image, a content of a sensor, a current time, a camera channel number, a recording resolution, a total recording time, an image storage data size (sector-by-sector storage), and a data CRC; And (c) recording data in the spread index of each memory block, and simultaneously circulating data in the data area of video and audio data captured by a memory card connected to the micro CCTV monitoring apparatus in a data area for each memory block. Recording and storing. Therefore, the memory card of the micro CCTV monitoring device attached to the front window of the vehicle records only once in the file system area (FAT area, ROOT directory area) during the memory initialization process, and re-writes until the entire memory area is recorded. Because of the structure of the file system that does not exist blocks, the video data is circulated and stored in the data area in the form of a ring buffer even if the image quality (file size per event) and the frequency of events are generated, thereby increasing the lifespan of the cells of the memory card. You can save the video surveillance by extending the.

Micro CCTV Surveillance Devices, Memory Cards, Spread Index, Data Area

Description

How to save image to memory card in micro CCTV monitoring device {SMALL-SIZED PRTABLE MULTICHANNEL CCTV MONITORING APPARATUS}

The present invention relates to a method of storing an image on a memory card in a micro CCTV surveillance apparatus. In particular, the life of a memory card connected to a micro CCTV apparatus connected to a small camera and a sensor to store the surveillance image data has an image quality (file size per event). And since it is variable according to the frequency of event occurrence, there is a block that only writes the file name and location once in the file system area (FAT area, ROOT directory area) during memory initialization process and re-writes until the entire memory area is written. The present invention relates to a method of storing an image on a memory card in a micro CCTV monitoring apparatus for providing a structure of a file system that does not have a large number of events, so as to extend the life of the memory card connected to the micro CCTV apparatus to store the surveillance image even if the frequency of events occurs frequently. will be.

Since a digital video recorder (DVR) stores a surveillance video signal as digital data using a digital image data processing method, it is possible to display multichannel images from a plurality of video cameras at once or to store them on a hard disk. In addition, the digital video recorder (DVR) compresses video data shot from multiple cameras of 1/4/9/16/25 channel by channel and stores them on the hard disk (HDD) to increase recording efficiency and add network functions. As a result, features that were not expected from analog devices became possible.

Digital closed circuit supervisors use a computer hard drive as a data storage device. The hard disk uses a magnetic read / write head with high speed rotation of magnetic disks and a mechanically coupled magnetic read / write head. Very weak to vibration and shock

Conventional analog and digital closed circuit monitoring devices are micro-storage for monitoring video data when used in narrow installation spaces due to the limitations of power supplies requiring constant power, the size of devices that are difficult to carry, and data storage devices that are vulnerable to vibration and shock. Use CCTV surveillance (Recordia).

1 is a view illustrating an image storing method of a memory card used in a conventional micro CCTV monitoring apparatus.

The File Allocation Table (FAT) file system has FAT12, FAT16, and FAT32 types, and the number after the FAT indicates the number of bits of the FAT entry that record the position and order of the cluster for each file, and the location of the file on the hard disk in the file system. An area for recording information and the like. FAT12 has been around since the beginning of MS-DOS and is still used for floppy disks. FAT16 was released with MS-DOS 3.0 to support hard disks larger than 32 megabytes, and used up to Windows 95, with support for up to 2 gigabytes of partitions, mainly for removable drives.

FAT32 supports hard disks larger than 2 gigabytes, has a maximum file size of 4 gigabytes, and has been replaced by NTFS due to the problem that Windows 2000 can format up to 32 gigabytes, but Windows 98, Windows It's used in older operating systems like Me, other operating systems like Linux, cameras and game consoles.

As shown in FIG. 1, the FAT file system manages files using a kind of file arrangement table that provides a location of clusters in which files are stored. A cluster is a set of sectors of 512 bytes, and the file system manages storage space in cluster units. When a new file is stored on disk, the file is stored in at least one or more clusters, which are scattered around the disk when stored in multiple clusters.

Therefore, the FAT file system used in the embedded system minimizes the updating of the same area (eg, the FAT area) in consideration of the characteristics of the flash memory.

When creating a file due to an event, data in the FAT area and the root directory area of the file system of the memory card (e.g. SD card) connected to the micro CCTV monitoring device attached to the front window of the vehicle are stored in the RAM during system initialization. The contents of the FAT area and the root directory area stored in the system are updated and reflected on the memory card, so that they are recorded once per event.

That is, the SD card used as the memory card can be used for 10000 (times) / 100 (event / day) = 100 (day) assuming that 100 events a day occur and the maximum number of recordings is 10000 times.

For reference, SD (Secure Digital) card is a next-generation memory card developed by Matsushita, SanDisk and Toshiba, and is a nonvolatile flash memory card format developed for use in portable devices such as digital cameras, handheld computers, PDAs, and GPS devices. to be. As of 2007, SD cards are available in capacities from 8 megabytes to 32 gigabytes.

In addition, since the maximum number of recordings is often less depending on the manufacturer of the flash memory used for the memory card connected to the micro CCTV monitoring device, the actual memory may be less than the above calculation.

The memory card connected to the micro CCTV monitoring device records data information in the Root area, stores the sector location in the FAT area, records and stores the data in the corresponding sector when data is recorded, and repeats this process whenever additional events occur. And, it stores the video taken from the micro CCTV monitoring device.

However, since the lifespan of the memory card connected to the micro CCTV surveillance device to store the surveillance video data varies depending on the image quality (file size per event) and the frequency of occurrence of the event, the higher the frequency of occurrence of the event, the smaller the service life of the memory card is. Lose.

When using a memory card to which the prior art is applied, the memory card connected to the micro CCTV monitoring device is intensively read and written in the file system areas (ROOT (①), FAT (②)) as compared to the data area (③) write count. An operation occurs, and as a result, there is a problem of shortening the entire life of the memory card.

The present invention has been proposed to solve the problems of the prior art, the life of the memory card (for example, SD card) connected to a plurality of small surveillance cameras and sensors connected to the micro CCTV device installed on the windshield of the vehicle is the image quality ( Since file size per event and frequency of event occurrence vary, only 1 file can be assigned to FAT during file initialization (FAT area, ROOT directory area) in the memory card so that the service life of the memory card is not reduced. It records only once and cyclically records the necessary information of the file system for each memory block in a ring buffer form in a spread index and data area of a certain size, which extends the life of the memory card and saves the micro CCTV surveillance video due to the occurrence of an event. To store images on a memory card in a micro CCTV monitoring device The purpose is to provide.

In order to achieve the object of the present invention, the image storage method in the memory card in the micro CCTV monitoring apparatus according to the present invention, (a) in the FAT area and the ROOT directory area of the file system area of the memory card connected to the micro CCTV device Writing a file name and file location only once when FAT is allocated in a memory card initialization process; (b) a memory area is composed of at least one sector, and each memory block is divided into a spread index and a data area of a predetermined size, and the spread index is divided into the file system area ( It is linked with the FAT area and the ROOT directory area, and contains index information (including index ID (index address) for each allocated data block and indicates correlation with adjacent data blocks at any position). A size, a compression method of an image, a content of a sensor, a current time, a camera channel number, a recording resolution, a total recording time, an image storage data size (sector-by-sector storage), and a data CRC; And (c) recording data in the spread index of each memory block, and simultaneously circulating data in the data area of video and audio data captured by a memory card connected to the micro CCTV monitoring apparatus in a data area for each memory block. Recording and storing.

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The data area records data in the spread index of each memory block and simultaneously records video and audio data recorded in real time from a micro-CCTV monitoring device equipped with a small camera in the data area of each memory block. Characterized in that the circular recording.

The memory card is connected to a flash memory card connection unit of the micro CCTV device, and uses any one of an SD card, a CF card, an XD card, a USB memory, and a memory stick, and the file system area (FAT area) during a memory initialization process. In the ROOT directory area, the file name and location are written only once when FAT is allocated, and there is no file system structure in which no blocks are re-written until all the memory areas are written. Data is recorded by inserting the Spread Index Area, which prevents the intensive reading and writing of the file system areas (ROOT, FAT), and the memory in the file system of the memory card having a fixed number of repetitions. It is characterized by extending the life of the cell as much as possible.

As described above, the image storage method in the memory card in the micro-CCTV monitoring apparatus according to the present invention, the lifespan of the memory card for storing the image recorded from the micro-CCTV monitoring apparatus connected to a plurality of small surveillance cameras and sensors Even if the file size per event and the frequency of events are increased, FAT 1 is assigned to the file name and location during initialization in the file system area (FAT area, ROOT directory area) of the memory card so that the service life of the memory card is not reduced. It records only once and cyclically records the necessary information of the file system for each memory block in the form of a ring buffer in a spread index and data area of a predetermined size, and efficiently stores the micro CCTV surveillance video on the memory card even if the number of events increases. Memo that has been saved repeatedly The life of the memory cell in the file system of the card has the effect of extending as much as possible, to improve storage stability of the observed image data.

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

2 is a view illustrating an image storing method of a memory card used in a micro CCTV monitoring apparatus according to the present invention.

The file system area (FAT area (②), root directory area (①)) of the memory card connected to the micro CCTV device (Recodia) connected to the sensor and camera is the file name and location during the initialization process of the memory card (eg SD card). Records only once when assigning FAT.

In one embodiment, the memory card that is connected to the micro CCTV surveillance device (Recodia) attached to the windshield of the vehicle to store the video data recorded by the small camera while driving the vehicle is SD card, CF card, XD card, USB memory card It can use any one of the memory sticks, and writes the data by inserting the Spread Index Area into the existing data area and writes them intensively in the file system areas (ROOT, FAT). It is characterized in that the phenomenon does not occur and the life of the memory cell is extended as much as possible in the file system of the memory card having a predetermined number of repetitions.

In the FAT and ROOT directory areas of the memory card (e.g. SD card) connected to the micro CCTV monitoring device, the file name and file location are recorded only once when FAT is allocated during memory initialization. An area ③ is composed of at least one sector, each memory block is divided into a spread index and a data area of a predetermined size, and a memory card connected to the micro CCTV monitoring apparatus. The photographed video data is cyclically recorded and stored in a ring buffer form for each memory block.

The memory area is divided into sectors (512 sectors) and each memory block of a predetermined size is divided into a spread index and a data area of a predetermined size, or the memory area is divided into at least one or more. Each memory block is divided into a spread index and a data area, and video data photographed by a small camera attached to a micro CCTV surveillance apparatus is cyclically recorded and stored in a ring buffer circulation form.

Spread Indexes (Spread Index 1,2,3 ...) are linked with the filesystem area and contain index information (index IDs) for each allocated data block, The size of the image, the compression method of the image, the content of the sensor (door opening, temperature, motion detection, distance measurement), the current time, the camera channel number, the recording resolution (320x240, 640x480, 720x480, 1024x768, 1024x1024, etc.), total recording time, image storage data size (sector-by-sector storage), and data CRC.

The data area records data in the spread index of each memory block, and simultaneously records and stores the video and audio data recorded in real time from a micro CCTV surveillance device equipped with a small camera in the data area of each memory block in a ring buffer. do.

The memory card connected to the micro CCTV monitoring device with the sensor or camera records the necessary information of the file system sequentially in the spread index and data area of each memory block. Since the file system area (ROOT directory in the case of FAT 32) does not exist, there is no block to be re-written until the entire area of the memory card (eg, SD card) is recorded. Therefore, the structure of the file system of the memory card (SD card) of the micro CCTV device (Recordia) records the file name and location only once in the file system area (FAT area, ROOT directory area), and records the entire memory area. Since there is no block to be rewritten until before, the entire memory area can be used as much as the maximum number of times the memory is written.

If a memory card uses a 2GB SD card and records an image at 4 Mbps, 0.5 (MB / sec) * 3600 (sec / hour) = 1800 (MB / hour) will be used.

A memory card (SD card) can record 1 hour x 10000 = 10000 hours (= 417 days) if it has a maximum number of recordings (events, SD Card record cycle), and 8 bps (bit per second) = 1 Byte. / sec, and the recording time is variable depending on the picture quality and the recording speed.

When using a memory card to which the prior art is applied, the memory card connected to the micro CCTV monitoring device is intensively read and written in the file system areas (ROOT (①), FAT (②)) as compared to the data area (③) write count. Operation occurs, and as a result, the entire life of the memory card is shortened, but the memory card to which the technique of the present invention is applied records data by inserting a Spread Index Area into each existing block of data. The phenomenon of intensive reading and writing in the system areas ROOT and FAT is prevented from occurring, and the lifespan of the memory cells is extended as much as possible in the file system of the memory card having a predetermined number of repetitions.

3 is a perspective view of a micro CCTV monitoring device according to the present invention.

Micro CCTV Surveillance Device (portable multi channel small closed circuit monitoring device) has power ON / OFF indication LED (1), recording (flashing indication) and playback notification LED (2), LCD display (3) for playing video, menu Selection button (4), down arrow key (5) with slow view during playback, up arrow key (6) with quick view during playback, image save, power on / off (long press for 2 seconds) and menu ESC button (7) for moving the screen to the previous screen, cradle (8) for mounting the main body of the portable multi-channel small closed circuit detection device, left and right adjustment screw (9) for adjusting the left and right direction after the product is attached, up and down direction Up and down direction adjustment screw 10 for adjusting the, and the mounting bracket 11 attachable with double-sided tape.

After attaching the double-sided tape of the cradle to the front glass of the driver's seat, fix the main body of the micro CCTV surveillance device with the fixing bolt, and then insert the flash memory card into the product.

In the embodiment, when mounted on the front glass surface of the driver's seat of the vehicle, the user assembles the main body and the cradle of the micro CCTV monitoring device, removes the double-sided tape protection film of the cradle, and attaches to the front glass surface of the vehicle. The user can fasten the mounting position on the glass of the vehicle with the fixing screw, insert the memory card 80 into the main body of the portable micro CCTV monitoring device, connect the power cable to the main body and the cigar jack, and connect the power to the monitor. Turn it ON to execute the recording mode. The user checks whether the front side is easily seen by the LCD display unit 210 of the portable multi-channel miniature closed circuit monitoring apparatus and photographs the image during operation.

The service menu of the micro CCTV monitoring device is composed of PLAY, CALENDAR, CAMERA, RECORD, DISPLAY, STORAGE, and POWER ON / OFF.

The bottom of the LCD display unit 210 of the micro CCTV monitoring device displays the screen status display (PLAY / STOP, etc.), playback progress rate, memory capacity, year / month / day display, hour and minute seconds.

When the power is supplied to the main body, the micro CCTV monitoring device automatically switches to the camera on (CAMERA ON), monitor on (LCD ON) and video recording (REC) modes.

The recording of the micro CCTV monitoring device consists of manual recording by a user inputting a REC button, or automatic recording which switches to a recording mode when the main body is connected. The portable micro CCTV monitoring device starts recording in the recording mode by the shock sensor, saves the captured video / audio to the flash memory card, selects the PLAY menu, checks the recorded video, and then presses the Esc button. Press to complete the video check.

The micro CCTV monitoring apparatus is operated by a PLAY, CALENDER, CAMERA, RECORD, DISPLAY, STARAGE, and POWER service menus selected by the user's key input unit 140.

When the PLAY service menu is selected, the second central processing unit transmits a reproduction address and a command to the flash memory card 80, transmits data in the corresponding address SECTOR unit, and the H.264 A / V decoder transmits the video / audio data. After decoding and converting the color space (YCbCr420-> RGB565) to convert the digital-analog signal, an image captured by the LCD display is output.

The CALENDAR service menu sets the time information of year / month / day / hour / minute / second of the date to be used.

The CAMERA service menu can be set to BRIGHT, CONTRAST, COLOR, HUE or DEFAULT to initialize the camera function.

When the CAMERA service menu is selected, the second central processing unit 110 selects a channel, selects a color, contrast, standard video signal method, and power supply method, and relates to the color, contrast, standard video signal method, and power supply method. The register is set, and the register setting value is stored in the second program memory 60.

If the RECORD service menu is selected, the video quality (QUALITY (BEST, HIGH, MEDIUM, LOW), FRAMERATE (15, 5, 2, 1 FRAME)) to be stored is set, and will be described in detail with reference to FIG. 10.

When the DISPLAY service menu is selected, the second central processing unit 110 sets an operation mode (power saving mode, always operating mode), and after adjusting the color and contrast, stores the color and contrast setting values to the second program memory 60. do.

When the POWER ON service menu is selected, the second central processing unit 110 turns on the power of the related device.

When the POWER OFF service menu is selected, the second central processing unit 110 transmits a POWER OFF command to the first central processing unit 100. The first central processing unit 100 stops supplying power to the second central processing unit 110, switches the first central processing unit to a power saving mode, and waits for key input.

4 is an internal configuration diagram of a micro CCTV monitoring apparatus according to an embodiment of the present invention.

Micro CCTV monitoring apparatus according to an embodiment of the present invention, the first battery 12, the first program memory 20, the first temporary memory 30, the second battery 40, the timer 50, the second Program memory 60, second temporary memory 70, flash memory card 80, main power control unit 90, individual power control unit 91, first central processing unit 100, second central processing unit 110, RF transceiver (WSN data transceiver) 120, sensor and alarm controller 130, alarm generator 134, key input unit 140, expansion slot 150, video encoder 160, voice encoder 220 ), Analog-digital signal converter (AD signal converter) (170,230), camera 180, microphone 240, image decoder 190, audio decoder 250, digital-analog signal converter (DA signal conversion) A) 200, 260, an LCD display 210, a sound output device 280, and a Bluetooth communication unit 270.

The micro CCTV monitoring apparatus includes a first central processing unit 100 that is in charge of power control, sensor control, alarm control, and key input, and a second central processing unit 110 which is responsible for compressing, restoring, and storing image and audio data. do.

The first central processing unit 100 operates at all times, and the second central processing unit 110 is configured to adjust the power supply and the operation to the first central processing unit 100.

The first central processing unit 100 adjusts the power supply of the second central processing unit 110, the camera 180, the LCD display unit 210, the flash memory card 80, and the expansion slot unit 150 to reduce power consumption. do. When the power of the second central processing unit 11 is cut off, the power of the first central processing unit 100 is not cut off, and it monitors the sensor operation at all times and controls to generate an alarm signal when the result value of the detected sensor exceeds the reference value. In order to reduce power consumption, the power supply of each functional unit is adjusted, and the power of the functional unit which is not in operation is frequently cut off and re-supplied during operation.

The first program memory 20 stores the control method and the software algorithm operated by the first central processing unit 100 as program codes when the device is manufactured. The first program memory 20 is not erased even when the power is cut off. The program code to be executed by the central processing unit 100 is supplied. According to the semiconductor manufacturing process, the first central processing unit 100 includes the first program memory 20 in a single package.

The first temporary memory 30 is used as a temporary data storage means that is frequently used when the first central processing unit 100 operates, and the recorded data is not preserved when the power is cut off.

The first battery 12 supplies main power and is capable of voltages higher or lower than the device drive voltage of the present invention and are classified as standard rechargeable batteries such as nickel-cadmium (NI-CD), nickel-hydrogen (NI-MH), and lead. (LEAD-ACID) Lithium-ion (LITHIUM-ION), including a rechargeable battery, can be used any of the standard (AA, AAA, CM, DM) batteries.

The second battery 40 supplies power to a timer (real time clock) 50 for counting accurate date time information, and the timer (real time) even if the first battery 12 is frequently replaced while the micro CCTV monitoring device is operating. The clock 150 supplies constant power to the timer 50 so as to count accurate time information.

The timer (real time clock) 50 is connected to the first central processing unit 100 and the second central processing unit 110, and generates an electronic device that generates precise electric vibrations that are resistant to changes in the external environment (temperature, power supply, etc.). Counts the date time, and connects the signal lines to provide the time information to the first central processing unit 100 or the second central processing unit 110 at any time. Therefore, even when the power is re-supplied by supplying power to the micro CCTV monitoring device with a second battery 40, the timer 50 does not need to reset the time.

The individual power control unit 91 is controlled by the control software of the first central processing unit 100, and the power supply, the operating method, the camera cable length, the second central processing unit calculation amount, etc. during the operation of the small closed circuit monitoring device. Measurements are made to adjust the individual supply power to each functional unit of the device to minimize power consumption during operation.

The sensor and alarm controller 130 adjusts the power supply to operate a sensor (inertial sensor, far infrared sensor, intrusion detection sensor, shielding sensor, distance measuring sensor, etc.) connected to the outside or the inside of the device, and the first central processing unit 100. Is converted into a signal that can be detected, and if the measured sensor value exceeds a reference value, an alarm is generated through the alarm generator 134.

The sensor and alarm controller 130 is connected to a plurality of sensors such as an inertial sensor, a far infrared sensor, an intrusion detection sensor, a closing sensor, and a distance measuring sensor, and receives a measured sensor value to detect the first central processing unit. When the measured sensor value exceeds the reference value, an alarm generation control signal is provided to the first central processing unit 100 so as to generate an alarm.

The alarm generating unit 134 is connected to the first central processing unit 100, and according to the alarm generation control signal transmitted from the sensor and the alarm control unit 130, an inertial sensor, a far infrared sensor, an intrusion detection sensor, a door opening sensor, a distance, and the like. An alarm is generated when a value detected from one of the measuring sensors exceeds a reference value.

The key input unit 140 is used to apply power by the user or to manually control the operation of the device. During operation, the first central processing unit 100 reads the key value input from the key input unit 140 at any time, adjusts the operation, and transmits the key value read to the second central processing unit 110. The second central processing unit 110 checks the key input value from time to time and displays the selection menu according to the key value on the LCD display 210.

The expansion slot 150 is connected to the first central processing unit 100 and the second central processing unit 110, and a small closed circuit monitoring device is used to connect various power supplies, sensor devices, and communication devices according to the installation area. In addition, at least one of a power control unit, a sensor control unit, an input / output port unit, and a communication control unit may be used as a function that may be added.

Since the second central processing unit 110 consumes more power than the first central processing unit 100 to process high-performance image data, the second central processing unit 110 is switched to a low power standby mode or a power down mode from time to time in order to reduce power consumption. In this case, situation information that can reduce power consumption during operation is transmitted to the first central processing unit 100 from time to time.

The second program memory 60 is connected to the second central processing unit 110, and stores program codes including control methods and software algorithms for operating the second central processing unit 110 when the device is manufactured, and the power is cut off. The program data is saved even in the stored state. The second central processing unit 110 receives the program code to be executed when the power is first supplied from the second program memory 60, stores it in the high speed second temporary memory 70, and executes the program code.

The second temporary memory 70 is connected to the second central processing unit 110, and frequently stores temporary data used by the second central processing unit 110, and does not preserve the recorded data when the power is cut off.

The second temporary memory 70 is used as a temporary storage place for temporarily storing data when compressing the video / audio data, and is mainly used as a temporary storage place for temporarily storing the restored data when restoring the video / audio data. , Use DDRAM.

The camera 180 is composed of a standard video signal (NTSC / PAL) camera or a digital output camera, and is fixed or portable, including a lens housing holder. In the case of a standard video signal camera, an image is output in an analog manner and transmitted to the analog-digital signal converter 170 through a cable.

The analog-digital signal converter 170 converts the analog video signal supplied from the camera 180 into a digital video signal and transmits the analog video signal to the video encoder 160. When the camera 180 is a digital method, the analog-digital signal converter 170 stops supplying power, and the digital video signal transmitted from the camera 180 is left without passing through the analog-digital signal converter 170. It is transmitted to the video encoder 160.

The image encoder 160 is connected to the second central processing unit 110 and compresses the digital image data received from the analog-digital signal converter 170 using a frequency converter half compression algorithm applying a digital image signal processing method. As a means for minimizing the occupation of the data storage space occupied by the flash memory card 80.

The voice encoder 220 is connected to the second central processing unit 110 and encodes the digital voice signal provided from the analog-digital signal converter 230 through the microphone 240 and stores the encoded digital voice signal in the flash memory card 80.

The image decoder 190 is connected to the second central processing unit 110 and restores compressed image data pre-stored in the flash memory card 80 using a frequency converter half restoration algorithm.

The voice decoder 250 is connected to the second central processing unit 110 and restores the compressed voice data previously stored in the flash memory card 80.

The A / V codec used the H.264 codec, and one of MJPEG, MPEG2, MPEG4 (H.264 codec, etc.) and MPEG7 codec can be used.

The flash memory card connection unit 80 is connected to the second central processing unit 110, and is a nonvolatile memory. Even when the power is cut off, the data is preserved. The semiconductor memory is integrated with a rigid plastic package and a metal connector. do.

The flash memory card uses any one of a secure digital (SD) card, a compact flash (CF) card, an XD card, a USB memory stick, and a memory stick as a micro CCTV surveillance device.

The flash memory card stores video / audio data captured in real time from a micro CCTV surveillance apparatus, and generation time information.

If a flash memory card is available, the second central processing unit 110 stores the video / audio data along with the generated time information to the flash memory card 80.

If the flash memory card is not available, the second central processing unit 110 determines the presence of a physical error in the flash memory, and generates a device error alarm if there is a physical error.

If there is no physical error of the flash memory card, it is determined whether the flash memory card is full, and if the flash memory is not full, the first central processing unit 100 resets the flash memory power (POWER CYCLE).

When the flash memory card is full, the second central processing unit 110 resets the address (pointer) of the flash memory card, determines whether the flash memory card is an overwrite prohibited area, and if the flash memory card is an overwrite prohibited area of the flash memory card. Move blocks of units by unit size.

If it is not the overwrite prohibited area of the flash memory card, the second central processing unit 110 stores the image / audio / sensor data and the generated time information on the flash memory card, determines whether the sensor event storage condition is completed, and stores the sensor event storage condition. When this is done, execute the following procedure.

If the sensor event storage condition is not completed, the second central processing unit 110 performs a process of compressing the A / D converted video and audio data from the camera and the microphone again.

As described above, the method of the present invention is implemented as a program, which can be read by using the software of the micro CCTV monitoring device and personal computer (CD-ROM, RAM, ROM, floppy disk, flash memory, hard disk, magneto-optical). Disk, etc.).

As described above, although described with reference to a preferred embodiment of the present invention, those skilled in the art without departing from the spirit and scope of the present invention described in the claims In the present invention can be carried out by various modifications or variations.

1 is a view illustrating an image storing method of a memory card used in a conventional micro CCTV monitoring apparatus.

2 is a view illustrating an image storing method of a memory card used in a micro CCTV monitoring apparatus according to the present invention.

3 is a perspective view of a micro CCTV monitoring apparatus (RECODIA) according to the present invention.

4 is an internal configuration diagram of a micro CCTV monitoring apparatus according to an embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

12: first battery 20: first program memory

30: first temporary memory 40: second battery

50: timer 60: second program memory

70: second temporary memory 80: flash memory card

90: main power control unit 91: individual power control unit

100: first central processing unit 110: second central processing unit

120: RF transceiver (ZigBee / WSN data transceiver)

130: sensor and alarm control unit 134: alarm generating unit

140: key input unit 150: expansion slot

160: video encoder 170: A / D signal conversion unit

180: camera 190: video decoder

200: D / A signal conversion unit 210: LCD display unit

220: voice encoder 230: A / D conversion unit

240: microphone 250: voice decoder

260: D / A signal conversion unit 280: sound output device

270: Bluetooth communication unit

Claims (6)

In the memory card in the micro CCTV monitoring device, (a) recording only a file name and file position during FAT allocation in the FAT area and the ROOT directory area of the memory card connected to the micro CCTV device during FAT allocation; (b) a memory area is composed of at least one sector, and each memory block is divided into a spread index and a data area of a predetermined size, and the spread index is divided into the file system area ( It is linked with the FAT area and the ROOT directory area, and contains index information (including index ID (index address) for each allocated data block and indicates correlation with adjacent data blocks at any position). A size, a compression method of an image, a content of a sensor, a current time, a camera channel number, a recording resolution, a total recording time, an image storage data size (sector-by-sector storage), and a data CRC; And (c) The data is recorded in the spread index of each memory block, and at the same time, the video and audio data captured by the memory card connected to the micro-CCTV monitoring apparatus are cyclically recorded in the data area for each memory block in a ring buffer form. Storing by; Image storage method in the memory card in the micro CCTV monitoring device comprising a. delete delete The method of claim 1, The data area, Simultaneously recording the data in the spread index of each memory block, video and audio data recorded in real time from the micro-CCTV monitoring device equipped with a small camera are cyclically recorded and stored in the data area of each memory block in a ring buffer form. Image storage method to a memory card in a micro CCTV monitoring device characterized in that the. The method of claim 1, The memory card, It is connected to the flash memory card connection of the micro CCTV device, using any one of the SD card, CF card, XD card, USB memory, memory stick, and the file system area (FAT area, ROOT directory area) during the memory initialization process The file name and location are written only once when FAT is allocated, and there is a file system structure in which no block is rewritten until all the memory areas are written, and each memory block is stored in the spread index area (Spread) in the existing data area. Data is recorded by inserting an index area so that intensive reading and writing in the file system areas (ROOT, FAT) does not occur, and the life cycle of a memory cell is maximized in the file system of a memory card having a predetermined number of repetitions. The image storage method in the memory card in the micro CCTV monitoring device characterized in that it is extended. delete

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