KR100577646B1 - Apparatus and method for operating memory of digital still camera - Google Patents

Abstract

According to the present invention, a single image input through a CCD is divided into a plurality of areas, compressed, and the last end information of the first half is changed into preset connection information, and the final compressed information is added to the second half compression target data to obtain a single compressed file. The present invention relates to a memory operating apparatus and a method of operating a digital still camera.

When the digital still camera is switched to the capture / monitor mode, the present invention divides the signal input through the CCD into a plurality of areas to generate capture data, and generates compressed source data by using the first captured data. Compressed source data is first written to the capture data area of the temporary memory, and when the compressed source data is compressed by the data compression / extension unit and written to the compressed target data area of the temporary memory, the compressed source data is generated by the second captured data. The compressed source data is written on the area where the first compressed source data is written in the capture data area of the temporary memory, and when the compressed source data is compressed by the data compressing / extending part to form a single file, the control unit Compression first written to the compression target data area After changing the information of the last end in the data connection Get information so that the writing on the storage medium.

 Digital Still Camera, Memory, Operation

Description

Apparatus and method for operating memory of digital still camera}

1 is a block diagram for explaining the configuration of a digital still camera to which the present invention is applied;

2 is a view showing each region of a memory applied to the present invention;

3 to 7 are diagrams for describing a method of implementing a single image file written on a storage medium.

<Code Description of Main Parts of Drawing>

110: CCD 120: first signal processor

130: second signal processing unit 140: display unit

150: temporary memory 160: data compression / extension

170: control unit

The present invention relates to a digital still camera.

More specifically, a single image input through the CCD is divided into a plurality of areas, compressed, and the final end information of the first half is changed to preset connection information and added to the compression target data of the second half to add a single compressed file. The present invention relates to a memory operating apparatus and a method of operating a digital still camera.

In general, a digital still camera is a camera that converts image information into an electric signal and performs all the signal processing such as processing, recording, and reproduction.

Therefore, a digital still camera requires a memory capable of writing an image photographed through a CCD instead of a conventional recording medium called film.

In addition to the DRAM, the above-described memory includes an external recording medium called a smart media card.

The above-described DRAM is divided into several areas, in which all data used in a digital still camera, that is, CCD RAW DATA, DISPLAY data, JPEG compressed source data, JPEG compressed target data, THUMBNAIL file, OSD data, LOGO data, The driving program and the like are written.

CCDs employed in digital still cameras having such a memory have been replaced with CCDs having many pixels to more clearly show a photographed subject as an external device.

When photographing a subject using such a CCD, more data is generated than display data and JPEG compression source data using a CCD having a small number of pixels among the data written on the above-described DRAM. There was a problem that all could not be accommodated.

In order to solve the above problems, the conventional DRAM may be adopted as another DRAM having a larger data capacity, but in this case, the structure of other circuits connected to the DRAM must be changed and the cost is increased.

Accordingly, an object of the present invention is to divide the single image input through the CCD into a plurality of areas in order to solve the above problems, and then change the last end information of the first half to preset connection information and add it to the compressed target data of the second half. By providing a memory operating device and a method of operating a digital still camera that can obtain a single compressed file.

In order to achieve the above object, the present invention provides an analog preprocessing method by separating an optical signal of a subject through a lens into an electrical signal, and separating the image signal converted into an electrical signal from the CCD into an RGB signal in response to an external control signal. A first signal processor to perform, a second signal processor for converting and outputting the RGB signal pre-processed by the first signal processor into a digital signal, and divided into a plurality of areas, the second signal processor in response to an external control signal A temporary memory for writing the compressed source data generated as part of the capture data in a capture data writing area output from the memory, and temporarily writing the compressed target data input from the outside; and a compression written in the temporary memory in response to an external control signal. After inputting and compressing the source data, the data is again stored in a predetermined area of the temporary memory. A data carrier compression / extension unit for temporarily writing data in response to an external control signal and displaying the compressed data in response to an external control signal, and a storage medium for writing compressed data written in the temporary memory in response to an external control signal. And a compression target written in the temporary memory by controlling the compression source data generated as a part of the capture data together with the capture data input from the second signal processor by the user's photographing signal to be written in a predetermined area of the temporary memory. When compressing the second half of the data, the last end information of the compressed first half is changed to preset connection information, and the second half compression data is added to the changed first compressed target data to form a single file, and then the data is stored in the storage medium. And a control unit for controlling to be written.

According to the method of the present invention for achieving the above object, (1) the compression source data generated as part of the capture data together with the capture data input from the second signal processor by the user's shooting signal to a predetermined area of the temporary memory; Writing; and (2) when compressing the latter half of the compressed target data written in the temporary memory, changing the last ending information of the compressed first half portion into preset connection information; and (3) the changed first half portion compression target. Compression target data of the latter part is added to the data to form a single file and then written to the storage medium.

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

1 is a block diagram illustrating a configuration of a digital still camera to which the present invention is applied.

As shown, the CCD 110 converts the optical signal of the subject through the lens and the aperture into an electrical signal.

The first signal processor 120 performs analog preprocessing by separating an image signal converted into an electrical signal from the CCD 110 as an RGB signal in response to a control signal of the controller 180.

The second signal processor 130 converts the RGB signal preprocessed by the first signal processor 120 into a digital signal and outputs the converted digital signal.

The temporary memory 150 is divided into a plurality of regions 210 to 270, and is captured by using the digital signal output from the second signal processor 130 described above in response to a control signal input from the controller 180. The data CAP_DATA is divided into two areas, the first half and the second half.

In addition, the compressed source data JPEG data is sequentially generated with respect to the capture data CAP_DATA divided into two regions, and the compressed source data JPEG data source generated as part of the capture data CAP_DATA together with the capture data CAP_DATA. ) Is written in the second area 220 of.

Meanwhile, the data compression / extension unit 160 temporarily writes the compressed target data JTGT_DATA generated using the compressed source data JPEG data in the third area 230.

The data compression / extension unit 160 receives and compresses compressed source data (JPEG SOURCE DATA) written in the above-mentioned temporary memory 150 in response to a control signal of the controller 180, and then classifies the temporary memory 150 again. The third area 230 is temporarily written among the regions, and the compressed data JTGT_DATA is extended in response to the control signal of the controller 180 to be displayed on the display unit 140.

The storage medium 170 has the compressed data JTGT_DATA written in the temporary memory 150 in the form of a file in response to a control signal of the controller 180.

The controller 180 temporarily stores the compression source data JPEG SOURCE DATA generated as a part of the capture data CAP_DATA together with the capture data CAP_DATA input from the second signal processor 130 according to the photographing signal of the user. When the second half portion 220 of the memory 150 is controlled to be written and the second half portion of the compressed target data JTGT_DATA written in the third region 230 of the temporary memory 150 is compressed, the last half of the compressed first half portion is compressed. Change the end information to the preset connection information, add the compressed target data (JTGT_DATA) in the second half to the compressed target data (JTGT_DATA) in the first half, form a single file, and control the data to be written to the storage medium (170). do.

Reference numeral 140 is a display unit.

2 is a diagram illustrating each area of a memory applied to the present invention.

As shown in the drawing, the temporary memory 150 generates an area 210 for writing image data IMAGE_DATA, which is luminance data and color difference data, and an image data IMAGE_DATA to be written in the area 210 described above. A region 220 for writing compression source data JPEG data generated as part of the capture data CAP_DATA together with the capture data CAP_DATA that is data input from the CCD 110, and the storage medium described above. Area 170 for writing compressed target data JTGT_DATA to be written, and area for writing data JTGTT_DATA for displaying the entirety of a plurality of images photographed by the user on display unit 140 ( 240, an area 250 for writing the OSD data (OSD_DATA) displayed on the display unit 140, an area 260 for writing the logo data LOGO_DATA displayed on the display unit 140, and program data. Zero for writing (PROGRAM) It has been divided into 270.

When referring to the respective areas of the temporary memory 150, from top to bottom for convenience, reference numeral 210 is the first area, 220 is the second area, 230 is the third area, 240 is the fourth area, 250 is the fifth area, 260 Is a sixth region, and 270 is referred to as a seventh region.

3 to 7 are diagrams for describing a method of implementing an image file written to a storage medium according to the present invention. The implementation method will be described in more detail with reference to FIGS. 1 and 2 as follows.

First, the monitor mode in the digital still camera will be described with reference to FIG. 3. The capture data CAP_DATA input through the CCD 110 and the first and second signal processing units 120 and 130 may be stored in a temporary memory ( Write in the second area 220 of 150. The capture data CAP_DATA written in the second area 220 is signal-processed by the second signal processor 130 by the control signal of the controller 180, and then is captured in the first area 210 as the image data IMAGE_DATA. Is written.

The image data IMAGE_DATA written in the first area 210 is output to the display unit 140 along with the OSD data OSD_DATA written in the fifth area 250 so that the user can view the image data IMAGE_DATA.

Next, a capture and monitor mode of a digital still camera will be described with reference to FIG. 4. First, an image signal input through the CCD 110 is divided into a first half and a second half, respectively, to capture a first image as shown in the figure. Data (1st 1 / 2CAP_DATA) and second capture data (2nd 1 / 2CAP_DATA) are written in some areas of the second area 220.

The controller 160 controls the second signal processor 130 to perform signal processing on the first capture data 1st CAP_DATA among the capture data CAP_DATA written in the second area 220. In addition, the first compressed source data 1st JPEG SOURCE DATA generated by the first capture data 1st CAP_DATA through the second signal processor 130 is written in a part of the second area 220, Compression target data 1st JTGT_DATA is written in the third area 230. In this case, the last data of the first compression target data 1st JTGT_DATA indicating the end of compression is “FFD9” 310 as shown in FIG. 6.

Then, the controller 180 controls the second signal processor 130 to perform signal processing on the second capture data 2nd CAP_DATA of the second area 220. In addition, the second compressed source data 2nd JPEG SOURCE DATA generated by the second capture data 2nd CAP_DATA through the second signal processor 130 may be the first compressed source data 1st of the second region 220. JPEG SOURCE DATA) is written in such a manner as to overwrite the written area.

The second compressed target data 2nd JTGT_DATA generated by the second compressed source data 2nd JPEG SOURCE DATA via the data compression / extension unit 160 is the first compressed target data 1st of the third region 230. It is written after the area written in JTGT_DATA) (see attached drawing FIG. 6).

At this time, the controller 180 attaches the last data of the first compressed target data (1st JTGT_DATA) written in the third area 230 to connect another compressed image to another image to form a single picture. As shown in FIG. 7, it is changed to "FFD7" 410. Then, the controller 180 controls to write the above-described one picture in the form of a file and to write it to the storage medium 170.

Lastly, the display mode of the digital still camera will be described with reference to FIG. 5. The controller 180 reads the compressed target data JTGT_DATA in the form of a file written on the storage medium 170 to read the third region 230. ).

The compressed target data JTGT_DATA written in the third area 230 is expanded through the data compression / extension unit 160 and then written as capture data CAP_DATA of the second area 220.

The capture data CAP_DATA written in the second area 220 is converted into the image data IMAGE_DATA under the control of the controller 180, and then written in the first area 210, and the image data of the first area 210. IMAGE_DATA is displayed on the display unit 140 along with OSD data OSD_DATA of the fifth region 250.

As described above, in the embodiment of the present invention, the capture data CAP_DATA input through the CCD 110 is divided into two areas. However, the capture data CAP_DATA is divided into two or more areas. The process can be implemented.

Therefore, even in the case of employing a CCD with an increased pixel count as described above, even if the capture data increases with the increase in the number of pixels when the memory operating method as in the present invention is applied, the existing memory can be used without additional memory. It works.

In addition, by using the existing memory, there is an effect that it is possible to solve the problem of increased cost or replacement of circuit components connected to the memory.

Claims (4)

A CCD for converting the optical signal of the subject through the lens into an electrical signal; A first signal processor configured to perform analog preprocessing by separating an image signal converted from the CCD into an electrical signal in response to an external control signal into an RGB signal; A second signal processor converting the RGB signal preprocessed by the first signal processor into a digital signal and outputting the digital signal; The compressed source data generated as a part of the capture data is written into the capture data writing area output from the second signal processor in response to an external control signal, and temporarily compresses the compressed target data input from the outside. Temporary memory to write; In response to an external control signal, the compressed source data written in the temporary memory is input, compressed, and then temporarily written in a predetermined area among the divided areas of the temporary memory, and the compressed data is expanded in response to the external control signal. Data data compression / extension for display; A storage medium for writing compressed data written in the temporary memory in response to an external control signal; And The compression source data generated as a part of the capture data together with the capture data input from the second signal processor by the user's photographing signal are controlled to be written in a predetermined area of the temporary memory, and the compressed target data written in the temporary memory is stored. When compressing the latter half, the last end information of the compressed first half is changed to preset connection information, and the compressed target data of the second half is added to the changed first compressed target data to form a single file, and then written to the storage medium. And a control unit for controlling the memory operating apparatus of the digital still camera. The method of claim 1, wherein the temporary memory, An area for writing image data which is luminance data and chrominance data; An area for writing capture data which is data input from a CCD to generate image data of the area, and for writing compressed source data generated as part of the capture data; An area for writing compressed target data to be written to the storage medium; An area for writing data for displaying all of the plurality of images photographed by the user on a display unit; An area for writing OSD data displayed on the display unit; An area for writing logo data displayed on the display unit; And A memory operating device of a digital still camera, characterized by being divided into areas for writing program data. (1) writing compression source data, which is generated as part of the capture data, together with the capture data input from the second signal processor by the user's photographing signal to a predetermined area of the temporary memory; (2) when the latter half of the compressed target data written in the temporary memory is compressed, changing the last end information of the compressed first half portion into preset connection information; And (3) a method of operating a memory of a digital still camera, comprising: adding compressed target data of the second half to the modified first half compressed target data to form a single file, and then writing the data into the storage medium. The method of claim 3, wherein the temporary memory, An area for writing image data which is luminance data and chrominance data; An area for writing capture data which is data input from a CCD to generate image data of the area, and for writing compressed source data generated as part of the capture data; An area for writing compressed target data to be written to the storage medium; An area for writing data for displaying all of the plurality of images photographed by the user on a display unit; An area for writing OSD data displayed on the display unit; An area for writing logo data displayed on the display unit; And A memory operating method of a digital still camera characterized by being divided into areas for writing program data.

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