KR100246786B1 - Window recording and reproducing device using an ic card - Google Patents

Abstract

1. TECHNICAL FIELD OF THE INVENTION

A window recording and reproducing apparatus capable of selecting, recording and reproducing only a specific portion of digital image data using an IC card.

2. The technical problem to be solved by the invention

A window recording and reproducing apparatus capable of reducing the amount of video data by recording only a specific portion of video data on an IC card is provided.

3. Summary of Solution to Invention

The window size is set in response to the horizontal-key and vertical-key input for setting the horizontal and vertical window sizes for converting the received analog video signal into a digital video signal and recording the specific image data. In this case, the calculator calculates and stores the set window size in the buffer. First, if the horizontal window size is set, the value is stored. If the vertical window size is set, the calculator calculates the horizontal and vertical window sizes. Record on the IC card. When the video signal recorded on the IC card is played back, if the video signal corresponding to the address generated by the number selection key is stored in the memory once and there is an input of another window number selection, the window size can be calculated and displayed. Monitor by converting to log signal.

4. Important uses of the invention

It can be used for recording and reproducing digital video signals.

Description

children. Window recording and playback device using C card

1 is a pulse waveform diagram according to the horizontal and vertical window size setting according to the present invention.

2 is a system block diagram for recording and reproducing a digital video signal according to the present invention.

3 is a flowchart of a digital video signal recording control of a controller for recording a digital video signal on an IC card as one embodiment of the present invention.

4 is a flowchart of a digital video signal reproduction control of a controller for reproducing a digital video signal recorded on an IC card as one embodiment of the present invention.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a digital video recording and reproducing system, and more particularly, to a window recording and reproducing apparatus that can select, record and reproduce only a specific portion of digital video data using an IC card.

Currently, there is a digital video recording and reproducing system that converts an analog video signal into digital video data, records it on a recording medium, and reproduces the recorded digital video data into an analog video signal. . Since the digital video recording and reproducing system records and reproduces as digital video data, the signal-to-noise ratio (signal / noise ratio) is improved compared to the system for recording and reproducing as an analog video signal, and due to the advantage of no dubbing degradation, Its use is increasing.

A conventional digital video recording and reproducing system for recording and reproducing video data using an IC card records and reproduces one field or frame as it is or compresses the data to reduce the amount of data to reduce the number of video data. There was a problem in that the amount of video data increases by recording and reproducing. In other words, the consumption of the IC card increases as the amount of video data increases when the IC card is used as a recording medium.

Accordingly, an object of the present invention is to provide a window recording and reproducing apparatus which can reduce the amount of image data by recording only a specific portion of received image data in an IC card in a digital image recording and reproducing system.

In the window recording and reproducing apparatus using an IC card, the present invention provides an A / D converter for converting an analog video signal into a digital signal and outputting the digital signal, and one frame output from the A / D converter. A memory for storing a digital video signal, a user interface unit for setting a window area of a predetermined portion of the video signal of one frame, and generating key data for selectively outputting window video signals recorded on the IC card; When inputting key data for window area setting, the corresponding horizontal window size value and vertical window size value are generated and outputted, and only the calculated window area image signal is read from the memory and recorded on the IC card, and the selected window image signal Controller to read them from the IC card and display them externally through the memory The receiving window size value of the horizontal and vertical window size value is characterized in that the configuration of the converter output to calculate the size of the window area.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. Many specific details, such as specific process flows, are set forth in the following description to provide a more general understanding of the invention. It will be apparent to those skilled in the art that the present invention may be practiced without these specific details. And a detailed description of known functions and configurations that may unnecessarily obscure the subject matter of the present invention will be omitted.

1 is a timing diagram for setting vertical and horizontal areas of image data that may appear according to an embodiment of the present invention. In FIG. 1, 10 denotes a horizontal synchronization signal of one frame, 20 denotes a write signal of image data, 30 denotes a read signal for setting the horizontal area size of the image data, and 40 denotes a vertical area of the image data. The read signal for setting the magnitude is shown.

2 is a block diagram of a digital video recording and reproducing system according to the present invention. In FIG. 2, an A / D converter (hereinafter, referred to as an A / D converter) 50 converts a video input signal into a digital signal, and converts the video input signal into a digital signal, thereby storing the memory 54 through a latch 52. To send). The latch 52 temporarily stores the digital video signal input through the A / D converter 50 and transmits the digital video signal to the memory 54 under the control of the controller 60. The address generator 58 is connected between the controller 60 and the memory 54 to transmit an address generated under the control of the controller 60 to the memory 54 when the digital image is recorded, and is recorded on the IC card. When the signal is reproduced, a window address corresponding to the input of the number selection key 72 is generated and transmitted to the IC card 68. The memory 54 stores one frame of the digital video signal transmitted from the latch 52 together with the address transmitted through the address generator 58 under the control of the controller 60, and corresponds to the selected window address during playback. To store the digital video signal. A digital-to-analog (hereinafter referred to as a D / A converter) 56 converts a digital video signal transmitted from the memory 54 into an analog signal and outputs it to a monitor. The controller 60 includes a latch 52, an address generator 58, a calculator 66, a number selection key 72, an H-key 74, a V-key 76, a reset key 78, and an IC. Each card 68 is connected to perform the overall control operation of the digital image recording and reproducing system according to the present invention. The calculator 66 is connected between the IC card 68 and the controller 60 calculates the size of the window area by using the horizontal window size value and the vertical window size value input from the controller 60, and then stores the IC card 68. To send). The buffer 62 is connected to the calculator 66 and used to first store the horizontal window size value input from the calculator 66. Since the capacity of the IC card 68 may be different, the value is washed by using the switch 64. The IC card 68 stores a window address, a set window image signal corresponding thereto, and a calculated window size value. The latch 70 connected between the IC card 68 and the memory 54 is output from the IC card 60 under the control of the controller 60 in reproducing the digital image data recorded on the IC card 68. The digital video data to be stored is temporarily stored. The number selection key 72, the H-key 74, the V-key 76, and the reset key 78, which are user interfaces, are connected to the controller 60, respectively, and are recorded on the IC card 68. A window address for selecting a key or key data for setting a horizontal window size and a vertical window size of the digital video signal input through the A / D converter 50 is generated and applied to the controller 60. The reset key 78 is used to clear the window video signal stored in the memory 54.

3 shows a control flowchart of the controller 60 for selecting only a specific portion of the received digital video signal and recording it on the IC card 68. As shown in FIG. Hereinafter, a process of recording only a specific portion of the digital image signal on the IC card 68 will be described with reference to FIGS. 1 to 3.

First, the analog video signal input through Vin is converted into a digital signal through the A / D converter 50 and stored in the memory 54 through the latch 52. That is, in step 80, the controller 60 checks whether the video signal of one frame is stored in the memory 54 and proceeds to step 82 when the video signal of one frame is stored. In step 80, the controller 60 temporarily stores the input video signal by controlling the latch 52 to set a window of the video signal. In step 82, the controller 60 checks whether there is a key input for setting the horizontal and vertical window sizes of the video signal from the H-key 74 and the V-key 76. In this case, the horizontal window size setting method is set by counting up the starting point in the horizontal direction from left to right as shown in 30 of FIG. 1 and setting the end point by counting up after setting the horizontal window size. The vertical window size setting method is also set in the same manner as the horizontal window size setting method, and the horizontal or vertical window size value inputted first is first stored in the buffer 62. If there is no input of the H-key 74 and the V-key 76 for setting the window area in step 82, the controller 60 proceeds to step 88 to control the address generator 58 to count the window addresses. In step 92, the video signal of one frame is recorded on the IC card 68 while increasing. On the other hand, if there is an area set in step 82, the controller 60 proceeds to step 84 to set the window area while increasing the horizontal and vertical counters corresponding to the input of the H-key 74 and the V-key 76. In step 86, the controller 60 checks whether the area setting is completed. If the window area setting is completed, the controller 60 proceeds to step 90 to control the address generator 58 and the calculator 66 to calculate the size of the window area and calculate the calculated area. Gives the address of the window video data. That is, the calculator 66 receives the vertical window size value under the control of the controller 60, calculates the size of the window area by adding it to the horizontal window size value already stored in the buffer 62, and then converts this value into an IC card ( 68). The controller 60 controls the address generator 58 so that an address corresponding to the window area size value calculated by the calculator 66 is generated, as well as the address of the window video signal to be recorded on the IC card 68. Is generated and output to the IC card 68. Accordingly, in step 92, the video signal corresponding to the set window area, the window address and the window area size corresponding thereto are recorded in the IC card 68. In step 94, the controller 60 checks whether the recording of the video signal is completed on the IC card 68, and when the recording is completed, ends the recording process of the digital video signal.

4 shows a control flow diagram of the controller 60 for reproducing the digital video signal recorded on the IC card 68. Hereinafter, the reproduction process of the digital video signal will be described with reference to FIGS. Shall be.

First, the controller 60 checks whether there is a number selection key input for reproducing a predetermined video signal recorded on the IC card 68 from the number selection key 72, and if there is a number selection key input, the address generator 58 Control to generate an address corresponding to the input number. That is, if there is the first number selection in step 100, the controller 60 proceeds to step 102 and increments the address counter by the first selection number. In this case, the address generated by the address generator 58 is input to the IC card 68, and under the control of the controller 60, the IC card 68 reads and latches a digital video signal corresponding to the input address. Stored in memory 54 via 70. The window area size of the number selected by the number selection key 72 is read out and stored in the buffer 62 through the calculator 66.

In step 104, the controller 60 checks whether there is a second number selection for displaying another video signal. If there is no second number selected as a result of the test, the control proceeds to step 110 in which the memory 54 is controlled to display only an image signal corresponding to the selected first number. If the second number is selected in step 104, the controller 60 controls the calculator 66 in step 106 to determine the window area size corresponding to the first number stored in the buffer 62 and the selected second. The image size is calculated by adding the window area size corresponding to the number. In step 108, the controller 60 checks whether the calculated image size value exceeds the size of one frame, that is, display is possible. If it is possible to display the test result, the controller 60 proceeds to step 104 to check whether there is another third number selection. If there is another third number selection as a result of the test, the above-described steps 106 to 108 are repeated. If the image of the size calculated in step 106 cannot be displayed, that is, if the size of one frame is exceeded, the controller 60 proceeds to step 110 and only the video signal stored in the memory 54 is selected by the first number selection. Output to the D / A converter 56 to display on the monitor. The controller 60 proceeds to step 112 and checks whether the display is completed. When the display is completed, the controller 60 completes the reproduction algorithm of the digital video signal.

As described above, the present invention extracts only specific window image data from one frame of video signal and writes it to the IC card together with the window area size value and the window address, thereby reducing the amount of data stored on the IC card and simultaneously creating an electronic album. Of course, there is an advantage in that more video signals can be recorded by performing data compression on the window video signals.

Meanwhile, in one embodiment of the present invention, the IC card is described as an example of the recording means of the video signal. However, the present invention can be applied to a digital VCR without any modification.

Claims (1)

A window recording and reproducing apparatus using an IC card, comprising: an A / D converter for converting an analog video signal into a digital signal and outputting the same; a memory for storing one frame of the digital video signal output from the A / D converter; A user interface unit for setting a window area of a predetermined portion of the video signal of the one frame and generating key data for selectively outputting window video signals recorded on the IC card; and inputting key data for setting the window area. A horizontal window size value and a vertical window size value corresponding thereto are generated and outputted, and only the calculated window area image signal is read from the memory and written to the IC card, and selected window image signals are read from the IC card and the memory is read. A controller for displaying to the outside through the controller, the horizontal window size value and the vertical window Windows recording and reproducing apparatus receives the right size value using the IC card, it characterized in that it consists of a calculator which outputs to calculate the size of the window area.