KR100833380B1 - Method and apparatus for saving an image of an image display device - Google Patents

Abstract

According to the present invention, when a capture command is inputted in capturing and storing an image in a storage capable image display device, a better image can be stored after capturing a plurality of frames sequentially.

That is, in the present invention, when a user inputs a capture command, the plurality of frames are sequentially captured and stored, and when the user wants to store the captured image, the motion is relatively determined by determining the motion amount of each frame image and calculating the difference of motion. Select less images to be saved.

Therefore, the image storage device and method of the image display device according to the present invention can determine whether the user wants to capture by capturing a plurality of frame images and showing them directly to the user in the form of a sub-screen when capturing images. By allowing the user to selectively store an image having a good state among the frames, it is possible to store an image having less motion deterioration generated when capturing a video, thereby providing a better image to the user, thereby improving user satisfaction.

Video / Capture

Description

Image storage device and method of image display device {Method and apparatus for saving (an) image of (an) image display device}

1 is a block diagram showing an image storage device of a display device according to the prior art.

2 is a block diagram showing an image storage device of an image display device according to the present invention;

3 is a flowchart illustrating a method of storing an image of an image display device according to the present invention;

4 is a flow chart showing in detail the method for storing the captured image selection shown in FIG.

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

110: external input terminal 120: scaler

130: display element interface unit

140: display unit 150: control unit

160: key input unit 170: capture image processing unit

171: Image capturing unit 172: Frame memory unit

173: image processing unit 174: JPEG coding unit

175: storage unit

The present invention relates to an image display device. In particular, when a capture command is input in capturing and storing an image in a displayable image display device, a plurality of frames are sequentially captured, and an image display is provided so that a better image can be stored. It relates to an image storage device and a method of a device.

In general, as a video display device having a storage function, a personal video recorder (PVR) is a device capable of recording digital broadcasts to a hard disk. The basic function is a recording function as well as a time-shift. It provides much better functions than the existing VCR while providing instant play and other trick play functions during live broadcasting.

In addition, PVR has the advantage of being able to record HD high-definition digital broadcasting at any time on the hard disk and various additional service functions are very attractive to users. Recently, the capacity of the hard disk mounted on the PVR is also increasing due to the rapid development of storage technology. As the number increased, the number of programs that could be recorded by the PVR also increased.

Hereinafter, an image storage device of a video display device according to the prior art will be described in detail with reference to the accompanying drawings.

1 is a block diagram illustrating a video storage device of a video display device according to the prior art.

As shown in FIG. 1, an image storage apparatus of an image display apparatus according to the related art includes a tuner and a channel decoder 10, a data processor 20, a display 30, a storage 40, It consists of a control part 50 and a capture part 60.

The tuner and channel decoder 10 encodes a tuner for selecting a channel desired by a user and a broadcast signal input through the tuned channel in a stream form, and the data processor 20 includes a tuner and a channel decoder 10. Encoding or coding to reproduce and store the data coded in the form of transport stream.

The display unit 30 displays the image and caption data processed by the data processor 20, and the storage unit 40 not only stores the data processed by the data processor 20, but also the controller 50. Controls the entire PVR including the data processing unit 20.

In addition, the capture unit 60 selects and captures a predetermined area of the image currently being displayed through the display unit 30 and stores it separately in an area different from the image data currently stored in the storage unit 40. Of course, if necessary, a storage unit (not shown) separate from the storage unit 40 may be provided, or a temporary memory area (not shown) for storing a captured image may be provided and stored. In this case, the captured image may be a video or may be a still image.

Here, the capture unit 60 may use a scaler IC (integrated circuit), and the scaler IC mainly adjusts the resolution of the image, and uses the same to capture the image of the portion selected by the user as a separate image data file. It is. That is, when the user sets a desired area by using a remote controller, the image of the set area is stored in the storage area.

In the image storage method of the image display apparatus according to the related art configured as described above, when image data is received, the image data to be captured by the user is converted into a separate file while the image data is displayed and stored in a pre-assigned area.

However, the image storage device of the image display device according to the prior art does not have a way to determine whether the user can actually store the image by capturing it instantaneously during the viewing, and when the video is captured momentarily, Movement deterioration occurs, there is a problem that there is no compensation method for this.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problem, and an object thereof is to allow a user to make a comparative judgment by capturing and displaying a plurality of frames when a user inputs a capture command.

In addition, another purpose is to allow a user to select and store an image having a relatively good motion deterioration caused by capturing a video momentarily among two frames.

In order to achieve the above object, an image storage device of an image display device according to the present invention includes a key input unit for inputting a user request command and an image capture command through the Z key input unit in an image display device having a display unit. And a captured image processor for sequentially capturing and storing images of a plurality of frames from the input image signal, and performing a predetermined signal processing, and displaying the images of the plurality of frames output from the captured image processor in sub-screen form. And a controller configured to control the image to be stored in the captured image processing unit according to whether a user inputs a storage command with reference to an image displayed on the sub-screen of the display unit. There is a characteristic.

Preferably, the captured image processor comprises an image capture unit for capturing an image displayed on the display unit, a frame memory unit for temporarily storing the image captured by the image capture unit, and the frame according to a control signal of the controller. An image processing unit for processing an image stored in a memory unit so as to be recognized by the scaler, or for storing a better image when the image displayed on the sub-screen of the display unit is to be stored; and the image processing unit And a storage unit for storing the image coded by the coding unit and a storage unit for storing the image coded by the coding unit.

More preferably, the image capture unit has a feature of capturing a plurality of frames with respect to the image captured by the user.

More preferably, the image capturing unit captures a plurality of frames based on a vertical synchronization signal of the captured image.

More preferably, the image processing unit calculates a difference in the amount of motion of the plurality of frames stored in the frame memory unit, and selects any one of the plurality of frames according to the calculation result and transmits it to the coding unit.

More preferably, the image processing unit calculates the difference in the amount of motion, and selects an image having less motion and transfers the image to the coding unit.

More preferably, the coding unit is characterized by coding in JPEG format.

According to an aspect of the present invention, there is provided a method of storing an image of an image display device, the method comprising: capturing and storing a plurality of frame images when a user inputs a capture command, and displaying the captured plurality of frame images; And controlling a user to selectively store any one of the displayed plurality of frame images when the user inputs a storage command.

Preferably, the displaying of the plurality of frame images is a step of simultaneously displaying the captured plurality of frame images in the form of a sub-screen.

More preferably, the controlling of any one of the plurality of frame images to be selectively stored may include calculating a motion difference of the previously stored plurality of frame images when the user inputs a storage command, and according to the calculated motion difference. Calculating a correlation coefficient and selectively storing an image having a small correlation coefficient.

Hereinafter, an image storage device and method of an image display device according to the present invention will be described in detail with reference to the accompanying drawings.

2 is a block diagram illustrating an image storage device of an image display device according to the present invention, FIG. 3 is a flow chart illustrating an image storage method of the image display device according to the present invention, and FIG. 4 is the present invention shown in FIG. In the image storage method of the image display device according to the flow chart showing the image selection method in more detail.

As shown in FIG. 2, an image storage device of an image display device according to the present invention includes an external input terminal 110 for receiving various video signals, a display 140, and a key input for inputting a user request command. When the image capture command is input through the key input unit 160, the captured image processor 170 sequentially captures and stores images of a plurality of frames from the input image signal, and then performs a predetermined signal processing. The image received through the external input terminal unit 110 is processed to be displayed on the display unit 140, or the image of a plurality of frames output from the captured image processing unit 170 is displayed in a sub-screen form. A user may store a storage command by referring to the scaler 120 processing to be displayed on the unit 140 and an image displayed on the sub-screen of the display unit 140. A control unit 150 controlling the captured image to be stored in the captured image processing unit 170 and a display element interface unit for transferring the image processed by the scaler 120 to the display unit 140 according to whether or not the captured image processing unit 170 is stored. And 130.

Here, the captured image processor 170 captures the image captured by the image capture unit 171 and the image capture unit 171 for capturing the image displayed on the display unit 140 according to the control signal of the controller 150 A frame memory unit 172 for temporarily storing the stored image and an image stored in the frame memory unit 172 to be recognized by the scaler 120 or displayed on a sub-screen of the display unit 140. In order to store an image, an image processing unit 173 for processing a better image may be stored, a coding unit 174 for coding a good image processed by the image processing unit 173, and the coding unit ( And a storage unit 175 for storing the coded image at 174.

The image storage device and method of the image display device according to the present invention configured as described above will be described in detail as follows.

First, when a power on command is input through the key input unit 160, the image received through the external input terminal unit 110 is processed by the scaler 120 into a displayable signal on the display unit 140, and then the display is performed. The display is displayed on the display unit 140 via the device interface unit 130.

When the user inputs an image capture command through the key input unit 160, the controller 150 outputs a control signal to the image capture unit 171, so that the image capture unit 171 receives a vertical synchronization signal. By reference, images of a plurality of frames are sequentially captured and stored in the frame memory unit 172. This completes capturing the video as a still image.

In addition, an image stored in the frame memory unit 172 is input to the image processing unit 173, and the image processing unit 173 converts the signal into a video signal conforming to a standard and inputs it to the scaler 120. In this case, the image signal conforming to the standard means that the scaler 120 converts the signal into a signal type that can be input, and the scaler 120 converts a signal input from the image processing unit 173 into the same signal as the PIP. After processing to be displayed in the form of a screen, it is transmitted to the display unit 140.

Then, the plurality of captured frame images are displayed on the display unit 140 in the form of a sub-screen, and the user determines whether to store the captured image with reference thereto and selects whether to save the captured image.

Subsequently, when a user inputs a storage command through the key input unit 160, the image processing unit 173 calculates a motion difference of the plurality of captured frame images, and calculates a correlation coefficient accordingly, thereby having relatively little motion. An image is selected and transferred to the coding unit 174. The coding unit 174 codes the image in JPEG and stores the image in the storage unit 175.

In this case, the storage unit 175 may be a removable / removable memory card used in a digital camera, or may be a memory mounted therein.

The storage method of the image storage device of the image display device according to the present invention configured as described above will be described with reference to FIG. 3. First, when a user inputs a power-on command, the received image is displayed (S110 to S120).

In operation S130, it is determined whether the user inputs an image capture command.

Subsequently, if the user inputs a capture command, the determination result (S130) captures and stores a plurality of frame images (S140).

In operation S150, image processing of the captured plurality of frame images is performed.

The image processed image is displayed in the form of a sub-screen (S160).

Subsequently, it is determined whether the user selects storage by referring to the displayed image (S170).

As a result of the determination (S170), when the user selects save, the selected image is stored (S180).

In addition, when the user inputs a power off command, the operation ends (S190).

On the other hand, the determination result (S170), if the user does not select the storage to determine whether or not to enter the cancel key (S200).

Subsequently, if the user inputs a cancel key (S200), the image stored in the frame memory is deleted (S210).

Herein, the method for storing the selected image will be described with reference to FIG. 4. When a user inputs a storage command, a difference between a plurality of captured A and B frame images is calculated (S181). For convenience, the image of the first frame is referred to as A, and the image of the second frame is referred to as B.

Then, the correlation coefficients a and b are calculated using the respective correlation functions (S182).

Subsequently, an image having a small correlation coefficient among the correlation coefficients is stored (S183 to S185). Therefore, when the correlation coefficient a is large, the image of the B frame is stored. When the correlation coefficient b is large, the image of the A frame is stored.

As described above, the image storing method of the image display device according to the present invention uses a horizontal and vertical synchronization signal and image data input from the image capturing unit 171 when a user inputs a capture command, and then the plurality of images are stored. Frame images are captured and stored in the frame memory unit. In order to show the captured image to the user, the image processing unit 173 processes the image signal to the scaler 120.

The scaler 120 receives this signal and displays the sub-screen on the display unit 140 and stores the captured image in the storage unit 175 through the image processing unit 173. The amount of motion of the captured plurality of frame images is determined, and the motion difference is calculated.

Because the plurality of captured images A and B are actually images having a difference of 1/60 seconds, unless the captured still image is captured, the captured plurality of images may appear as the actual amount of motion, The correlation coefficients a and b can be obtained from the correlation functions of the images A and B, respectively. This correlation coefficient is larger than 0 and smaller than 1, and the larger the number of motion images, the larger the correlation coefficient is.

Therefore, the comparison of the magnitudes of the correlation coefficients allows selection of a relatively less moving image when capturing a plurality of frames, and the selected image is finally inputted to the coding unit 174 to be coded and then stored in the storage unit. do.

As described above, the image storage device and method of the image display device according to the present invention have the following effects.

First, in capturing an image, a plurality of frame images may be captured and immediately displayed to the user in a sub-screen form to determine whether the user wants to capture the image.

Second, it is possible to selectively store an image having a good state among the images of the plurality of frames, thereby storing an image having less motion deterioration generated when capturing a video.

Third, user satisfaction may be improved by providing a better image to the user.

Claims (11)

In the image display device having a display unit, A key input unit for inputting a user request command; A captured image processor configured to sequentially capture and store a plurality of frame images from the received image signal when an image capture command is input through the key input unit, and perform a predetermined signal processing; A scaler for processing an image of a plurality of frames output from the captured image processor to be displayed on the display unit in a sub-screen form; And, And a control unit for outputting a control signal to select and store one specific image having a better state among the plurality of frame images based on the movement amount when the storage command is input through the key input unit. Image storage device of a video display device characterized in that the configuration. The method of claim 1, The captured image processing unit The image capture unit for capturing an image displayed on the display unit, a frame memory unit for temporarily storing the image captured by the image capture unit, and an image stored in the frame memory unit according to a control signal of the controller An image processing unit for recognizing a scaler and selecting an image having a better state from among the plurality of frame images according to a control signal of the controller, a coding unit for coding an image selected by the image processing unit, and And a storage unit configured to store an image coded by the coding unit. The method of claim 2, And the image capturing unit captures a plurality of frames with respect to an image captured by the user. The method of claim 2, And the image capturing unit captures a plurality of frames based on a vertical synchronization signal of the captured image. The method of claim 2, The image processing unit calculates a difference in the amount of motion of the plurality of frames stored in the frame memory unit, and selects any one of the plurality of frames according to the result of the calculation and transfers it to the coding unit. Storage. The method of claim 5, wherein And the image processing unit calculates a difference in the amount of movement, selects an image having a small movement, and transmits the selected image to the coding unit. The method of claim 2, And the coding unit encodes the image in JPEG format. Capturing and temporarily storing a plurality of frame images when a capture command is input from a user; Displaying the captured plurality of frame images; Determining an amount of motion of the multi-frame image when a storage command of the image is input; Selecting one specific frame image having a better state from among the plurality of frame images based on the determined amount of motion; And, And storing the selected specific frame image. The method of claim 8, The displaying of the plurality of frame images may include And displaying the plurality of captured frame images simultaneously in a sub-screen form. The method of claim 8, Selecting the specific frame image Calculating a motion difference based on the determined amount of motion of the plurality of frame images; calculating a correlation coefficient according to the calculated motion difference; and selecting an image having a small correlation coefficient; Image storage method of an image display device, characterized in that made. The method of claim 8, And deleting a plurality of captured frame images when the user inputs a cancel command without inputting a storage command.

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