KR100261594B1 - Compact flash card digital still camera - Google Patents

Abstract

PURPOSE: A digital still camera using a compact flash card is provided to reduce the size of the digital still camera by using the compact flash card as a memory of the image signal. CONSTITUTION: The digital still camera using a compact flash card includes a lens group(15), a signal processor(25), a memory(60), a compact flash card(90) and a central processor(70). The lens group tapes an object and outputs a camera signal. The signal processor converts the camera signal to digital version and outputs an image signal including color difference signal as well as brightness signal. The memory stores the image signal temporarily. The compact flash card stores the image signal. The central processor compresses the image signal stored temporarily and stores the compressed result in the compact flash card during image recording, and extracts the image signal stored in the compact flash card to output the extracted result to the memory during image reproduction.

Description

Digital still camera using compact flash card {COMPACT FLASH CARD DIGITAL STILL CAMERA}

The present invention relates to a digital still camera using a compact flash card, and more particularly, to a digital still camera using a compact flash card, which is economical and portable, using a digital still camera. will be.

In general, a digital still camera records the captured image as an electrical signal on a memory card.

Therefore, a PCMCIA type (PCMCIA) type memory card was used as a storage device for storing images captured by a conventional digital still camera. .

However, the PCA card has a large size, a high price, a large burden for the user to purchase, and it is difficult to miniaturize a digital camera.

Therefore, an object of the present invention is to solve the above disadvantages, by using a solid floppy disk in the memory card of the digital camera, it is possible to store a large amount of data, using a compact flash card that is small in size and easy to carry To provide a digital still camera.

1 is a block diagram of a digital still camera apparatus using a compact flash card according to an exemplary embodiment of the present invention.

As a means for achieving the above object, the configuration of the present invention, in the digital still camera,

An imaging unit for imaging an object and outputting an imaging signal;

A signal processor converting the captured image signal into a digital signal and outputting an image signal including a color difference signal and a luminance signal;

A memory for temporarily storing the video signal;

A compact flash card unit for storing the video signal; And

And a central processing unit which compresses the video signal temporarily stored in the memory and stores the compressed video signal in the compact flash card unit, and expands the video signal stored in the compact flash card unit and outputs the video signal to the memory.

According to the digital still camera using the compact flash card, the digital camera can be miniaturized, and the user can purchase the compact flash card additionally at a lower price, thereby enabling the digital still camera to be used efficiently and economically.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings for those skilled in the art to easily implement the present invention.

1 is a block diagram of a digital still camera using a compact flash card according to an embodiment of the present invention.

As shown in FIG. 1, the configuration of a digital still camera using a compact flash card according to an embodiment of the present invention includes an image capturing unit 15, a signal processing unit 25, a memory control unit 50, a memory 60, The central processing unit 70, the selection switch unit 75, the compact flash card 90, the video 100, and the connector are included.

The imaging unit 15 includes a lens 5 and an imaging device 10. The lens 5 condenses the light reflected from one point of a subject to a focal plane and provides the imaging device 10 to capture an image. A device (CCD: Charge Coupled Device) 10 converts an image passing through the lens 5 into an electrical signal and sequentially outputs the signal to the signal processor 25 at regular intervals of 1/60 seconds or less. do.

The signal processing unit 25 includes a CDS 20, an ADC 30, and a DCP 40, and converts an image pickup signal by the imaging unit 15 into a digital signal. The image signal including the color difference signal and the luminance signal is output to the memory controller 50 by processing.

In more detail, the CDS 20 extracts a pure analog signal from the signal output from the imaging device 10 and provides the analog-to-digital converter 30 by excluding a driving clock signal. .

The analog-to-digital converter (ADC) 30 converts an analog image signal output from the CD 20 into a digital signal and provides it to the digital camera signal processor 40.

The DC 40 processes the digital image signal output from the analog-to-digital converter 30 and outputs the digital color difference signal and the luminance signal to the memory controller 50.

The memory controller 50 temporarily stores the signal output from the DC 40 in the memory 60.

The central processing unit 70 compresses and restores an image signal stored in the memory 60, and performs a command for processing an operation if the image signal is stored in a data format.

The selection switch unit 75 instructs the central processing unit 70 to perform the regeneration and deletion functions by the user's switch selection.

The compact flash card 90 includes a flash memory controller 92 and a flash memory 94 to store the image data compressed and output through the central processing unit 70 through a connector, and to store the image data. The compressed video data stored in response to the reproduction request is provided to the central processing unit 70 via the connector. In this case, the compact flash card 90 is signally connected to the central processing unit 70, and is composed of two rows of 50 pins for mounting and detaching.

In more detail, the flash memory 94 stores image data output from the central processing unit 70, and includes a plurality of NAND types that are negative logical products or NOR types that are negative logical products as logical operators.

The flash memory controller 92 stores the image data compressed from the central processing unit 70 in the flash memory 94 at the time of recording the image, and stores the image signal compressed and stored in the flash memory 94 at the central processing unit 70 during video reproduction. to provide.

In addition, the configuration of the memory control unit 50 is such that the data path change and input / output direction setting between the DC 40, the central processing unit 70, and the memory 60 is generated, and an appropriate address is generated in the memory 60. It is made of a device.

The operation of the digital still camera using the compact flash card 90 according to the embodiment of the present invention by the above configuration is as follows.

The image of the subject to be photographed is converted into an electrical signal by the imaging device 10 through the lens, and the signals are sequentially output at regular intervals of 1/60 second or less.

Among the signals output from the imaging device 10, the pure analog imaging signal except for the driving clock signal is extracted from the CD 20.

The analog signal extracted from the CD 20 is converted into a digital signal by the analog-to-digital converter 30, and the digitally converted signal is signal-processed to convert the digital signal from the DC 40 to a digital color difference signal. And are separated into a luminance signal and output, and the output signal is stored in the memory 60 through the memory controller 50.

The central processing unit 70 receives and compresses the image data stored in the memory 60 through the memory control unit 50, and controls the flash memory 94 under the control of the flash memory control unit 92 in the compact flash card 90. )

If the user selects the playback switch of the selection switch unit 75 when the user wants to play the video data stored in the compact flash card 90 through the video 100, the central processing unit 70 returns the playback switch on signal. Receives the image data read signal to the flash memory 94.

The flash memory 94 has an address of the selected image data, and the central processing unit 70 has a form of two rows and 50 pins in the compact flash card 90 in which the image data is stored by the address. The image data is output to the central processing unit 70 through.

The compressed image data is decompressed as the image data output to the central processing unit 70, and the image data extended by the central processing unit 70 is output to the memory controller 50 and then stored in the memory 60.

When the image is completely stored in the memory 60 in one frame, it is input to the encoder of the DC 40 through the memory controller 50, and is output as a video to reproduce the image data.

Therefore, the effects of the present invention operating as described above can reduce the size of the digital camera by using a compact flash card as a storage medium for photographed image data.

In addition, the user can purchase at a lower price, and because of its small size, it is easy to carry, thereby providing a digital still camera using a compact flash card that can be used more efficiently and economically.

Claims (6)

In a digital still camera, An imaging unit for imaging an object and outputting an imaging signal; A signal processor converting the captured image signal into a digital signal and outputting an image signal including a color difference signal and a luminance signal; A memory for temporarily storing the video signal; A compact flash card unit for storing the video signal; And A compact flash card including a central processing unit for compressing a video signal temporarily stored in the memory when recording an image and storing the compressed video signal in the compact flash card unit, and extending the video signal stored in the compact flash card unit and outputting the video signal to the memory. Digital still camera. The method of claim 1, wherein the imaging unit, A lens for collecting light reflected from one point of the subject onto a focal plane; And A digital still camera using a compact flash card comprising an image pickup device for converting the image passing through the lens into an electrical signal and sequentially output. The method of claim 1, wherein the signal processing unit, A CDS extracting an analog production signal excluding a driving clock signal among the signals output from the imaging unit; An analog to digital converter for converting the analog video signal into a digital video signal; And A digital still camera using a compact flash card including a DC for signal processing the converted digital image signal to output a digital color difference signal and a digital luminance signal. The digital still camera of claim 1, further comprising a selection switch connected to the central processing unit for reproducing and erasing the video signal according to a user's operation. The method of claim 4, wherein the central processing unit, The digital still camera using a compact flash card which extends data to an address of the video signal stored in the compact flash card and stores the data in the memory when the user selects a reproduction operation of the video signal by operating the selection switch. The method of claim 1, wherein the compact flash card unit, A flash memory storing at least one NAND gate or NOR gate to store the compressed video signal; And The flash memory stores the compressed video signal in the flash memory when the video signal is recorded under the control of the central processing unit, and extracts the compressed video signal stored in the flash memory and provides the compressed video signal to the central processing unit. Digital still camera using a compact flash card comprising a control unit.