KR100631215B1 - Method and apparatus for file information searching of smart media card using a digital still camera - Google Patents

Abstract

File information retrieval method of a smart media card using the disclosed digital still camera and the device retrieves all folders and file information recorded on the smart media card regardless of a specific file format without the user connecting the digital still camera to a computer. And display.

When the smart media card is inserted into the digital still camera, the present invention searches the file allocation table area and the root directory area of the smart media card to display the directory information and the file information of the smart media card on the LCD screen. When the selection signal is input, it is determined whether the file selected by the user is a file of a format that can be displayed on the screen, and if the file is a displayable result, the corresponding file is displayed on the screen.

Accordingly, the present invention provides an effect of increasing the use efficiency of the smart media card by directly searching or displaying various file information stored in the smart media using not only a digital still camera but also other media such as an MP3 player.

Digital Still Camera, Smart Media Card, File Allocation Table (FAT), Root Directory

Description

File information retrieval method of smart media card using digital still camera and its device {Method and apparatus for file information searching of smart media card using a digital still camera}

1 is a block diagram schematically showing the configuration of a digital still camera according to the present invention;

2 is a flowchart illustrating a file information retrieval method of a smart media card using a digital still camera according to the present invention in detail.

Explanation of symbols on the main parts of the drawings

10 lens 20 CCD

30: digital signal processing unit 40: control unit

50: Program ROM 60: JPEG Processing Unit

70: burn DRAM 80: smart media card

90: LCD unit 100: key input unit

The present invention relates to a file information retrieval method and apparatus for a smart media card using a digital still camera.

More specifically, files on a smart media card using a digital still camera that allow the user to search and display all folders and file information recorded on the smart media card, regardless of the specific file format, without the digital still camera connected to the computer. An information retrieval method and apparatus are provided.

In general, a digital camera converts an image incident through a lens into an electrical signal using a photoelectric conversion element such as a charge coupled device (CCD), and then stores and stores the image in a memory device such as a semiconductor memory device or a magnetic tape. Appliance.

There are two types of digital still cameras, which intermittently capture images and store them in a semiconductor memory device, and digital video cameras, which continuously capture images and store them in a storage medium such as a magnetic tape.

And all these digital cameras can be connected to the computer device to send and receive data.

That is, by storing the image data photographed with the digital camera in the storage device of the computer device separately, it is possible to improve the image storage capacity, and to control the operation state of the digital camera using the computer device.

These digital cameras have recently been expanded with the spread of home computer devices, so that users can directly view and edit images taken by themselves through computer display devices using computer devices to create multimedia home pages or presentation materials, or to edit edited images such as printers. It can be output to an output device or can be stored in a hard disk drive or a compact disk.

For example, you can make a homepage using images taken with a digital camera by connecting to the Internet, create various reports by inserting the shot images, and create an electronic album with commemorative photos such as graduation and marriage. It can be made or stored in a recording medium such as a diskette.

Such digital cameras typically provide a high resolution of VGA (640 × 480) or higher, and use a large memory such as a smart media card to record and record a large amount of subjects.

However, the smart media card used in the conventional digital still camera as described above only retrieves or displays the data captured by the digital still camera on its own, and stores information on files or directories stored through other media such as an MP3 player. There is a problem in that it does not provide information about other files to the user because it can not search or display, and also caused inconvenience to not use the smart media card efficiently.

Accordingly, an object of the present invention is to search for and display all folder and file information recorded on a smart media card regardless of a specific file format without connecting the digital still camera to a computer so as to solve the above problems. The present invention provides a method and apparatus for retrieving file information of a smart media card.

The file information retrieval method of the smart media card using the digital still camera according to the present invention for achieving the above object comprises the steps of determining whether the smart media card is inserted into the digital still camera; Searching for a file allocation table area and a root directory area of the smart media card when the smart media card is inserted; If the search of the file allocation table and the root directory is completed, displaying directory information and file information of the smart media card on the LCD screen; Determining whether a file selection key signal is input by a user; Determining whether the file selected by the user is a file of a format that can be displayed on the screen; In the case of a file having a displayable format, the corresponding file is displayed on a screen, and in the case of a file in a format that cannot be displayed, a predetermined error message is displayed on the screen.

In addition, a file information retrieval apparatus for a smart media card using a digital still camera according to the present invention includes: a CCD for converting an optical signal of a subject input from a lens into an electrical signal; A digital signal processing unit converting pixel information input from the CCD into a digital signal and processing the image information into image data; It controls the storage of the photographing signal input through the digital signal processing unit, and when the smart media card is mounted, the file allocation table area and the root directory area are searched and displayed to display the stored directory information and file information. A controller for controlling the display of the file after checking whether the file selection signal is input by the user among the files; A JPEG processing unit for compressing the still image data photographed under the control of the control unit; An LCD unit configured to display a state of a subject or a photographed picture when shooting under the control of the controller; And a key input unit to which a file selection signal desired to be displayed by the user is input through directory information and file information displayed on the LCD unit.

Hereinafter, a method and apparatus for retrieving file information of a smart media card using a digital still camera of the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram schematically showing the configuration of a digital still camera according to the present invention.

As shown, the CCD 20 converts the optical signal of the subject, which is input from the lens 10, which enlarges and transmits the light source of the subject, into an electrical signal.

The digital signal processing unit (DSP) 30 converts the pixel information input from the CCD 20 into a digital signal and processes it into image data.

The controller 40 controls the storage of the photographing signal input through the digital signal processor 30, and when the smart media card 80 described later is mounted in the digital still camera, the file allocation table of the smart media card 80 (File An Allocation Table area and a Root Directory area are searched for and controlled to display directory information and file information on a screen of the LCD unit 90 described later according to the retrieved file allocation table area and the root directory area.

In addition, when the file selection signal for displaying a file desired by the user is input through the key input unit 100 among the files displayed on the LCD unit 90, the control unit 40 stores the corresponding file stored in the smart media card 80. After checking whether the file can be displayed or not, control to display the file or control the user to check a predetermined error message.

In addition, the control unit 40 controls to display a different color to distinguish a file of a format that can be displayed and a file that cannot be displayed on the screen of the LCD unit 90 to be described later.

The program ROM 50 stores program operation information of the control unit 40.

The Joint Photographic Coding Experts Group (JPEG) processing unit 60 compresses the still image data photographed under the control of the control unit 40.

The image DRAM (Dynamic RAM) 70 temporarily stores the image information compressed through the JPEG processing unit 60.

The smart media card 80 finally stores image information temporarily stored in the image DRAM 70.

The LCD unit 90 displays a corresponding screen when a picture of a subject or a picture taken by a user is to be checked during shooting.

Next, the file information retrieval method of the smart media card using the digital still camera according to the present invention configured as described above will be described in detail with reference to FIG.

2 is a flowchart illustrating a file information retrieval method of a smart media card using a digital still camera according to the present invention in detail.

First, the controller 40 determines whether the smart media card 80 storing various files such as a photographing file is inserted into the digital still camera (S20).

As a result of determination, when the smart media card 80 is inserted, the file allocation table area and the root directory area of the smart media card 80 are searched (S21). When the file allocation table and the root directory are searched, the smart media card 80 is completed. Directory information and file information stored on the screen are displayed on the LCD screen (S22).

As such, when displaying directory information and file information on the screen of the LCD unit 90, the control unit 40 distinguishes between files of a format that can be displayed on the screen of the LCD unit 90 and files that cannot be displayed. Control to display different colors.

This is to allow the user to immediately check files in a format that can be viewed directly on a digital still camera and files that are not.

Now, while the directory information and the file information are displayed through the LCD unit 90 as described above, the controller 40 determines whether the user inputs a file selection key signal through the key input unit 100 to display the corresponding file. It is determined (S23).

When the file selection key signal is input by the user, it is determined whether the file selected by the user is a file of a format that can be displayed on the screen (S24).

As a result of the determination, if the file is in a format that can be displayed, the file is displayed on the screen (S25). If the file is in a format that cannot be displayed, a predetermined error message (for example, 'the selected file is not displayed) is displayed on the screen. File cannot be obtained '(S26).

Accordingly, the user can easily check the amount of the smart media card 80 remaining through the directory information and the file information displayed on the LCD unit 90 to help in shooting. You can use digital still cameras more efficiently by checking files directly and deleting unnecessary files immediately.

As described above, according to the method and apparatus for retrieving the file information of the smart media card using the digital still camera of the present invention, the various file information stored in the smart media using not only the digital still camera but also other media such as an MP3 player is digital. By directly searching or displaying in a still camera, the remaining capacity can be adjusted and edited, thereby increasing the utilization of the smart media card.

Claims (4)

(1) determining whether the smart media card is inserted into the digital still camera; (2) searching for a file allocation table area and a root directory area of the smart media card when the smart media card is inserted; (3) When the file allocation table and the root directory are searched, the directory information and file information of the smart media card are displayed on the LCD screen, but the colors are different to distinguish between the files that can be displayed and the files that cannot be displayed. Displaying by; (4) determining whether a file selection key signal is input by the user; (5) determining whether the file selected by the user is in a format that can be displayed on the screen; And (6) When the result of the determination is a file of a format that can be displayed, the file is displayed on the screen, and in the case of a file that cannot be displayed, a predetermined error message is output on the screen. File information retrieval method of smart media card using camera. delete A CCD for converting an optical signal of a subject input from the lens into an electrical signal; A digital signal processing unit converting the pixel information input from the CCD into a digital signal and processing the image information into image data; Controlling the storage of the photographing signal input through the digital signal processing unit, and when the smart media card is mounted, searches for a file allocation table area and a root directory area to display stored directory information and file information, and displays the plurality of displayed When the file selection signal is input by the user among the files in the file, check whether the file can be displayed and then control the display of the file. A control unit for controlling to display differently; A JPEG processing unit for compressing still image data photographed under the control of the controller; An LCD unit configured to display a state of a subject or a photographed picture when shooting under the control of the controller; And And a key input unit for inputting a file selection signal to be displayed by the user through directory information and file information displayed on the LCD unit. In the file information display method of the memory card, The directory information and file information of the memory card are displayed on a liquid crystal display (LCD) screen, and the colors of the memory card may be displayed in different colors to distinguish between files of a displayable format and files that cannot be displayed. How to display file information.

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