KR100205370B1 - Apparatus and method for generating signal slow motion - Google Patents

Abstract

The present invention relates to a slow motion signal generation method and apparatus for allowing slow motion to be viewed through a screen of a display device without storing image information. In particular, a signal processing unit for receiving a television signal and converting the signal into a signal for display on a screen; A motion coefficient is obtained by comparing a frame buffer storing the signal processed by the signal processing unit, a distribution unit sequentially outputting the output of the frame buffer on a frame-by-frame basis, a current frame output through the distribution unit and a frame to be compared. And a motion coefficient finder for multiplying the obtained motion coefficient by a variable coefficient, adding the current coefficient to the current frame, and storing the motion coefficient finder for applying to frames sequentially input, and the frame information stored in each of the plurality of motion coefficient finders. And then divide by the number of motion factor finders It is configured to include a signal generator for generating a signal, by generating a slow motion signal, you can see the slow motion without storing the video information, and also double-screen the slow motion screen generated without storing the video information at the same time Can be seen through.

Description

Slow motion signal generation method and apparatus

The present invention relates to a method and apparatus for generating a slow motion signal that allows a user to view slow motion on a screen of a display device without storing image information. Conventionally, in order to view slow motion, a video signal is recorded in a video recording / reproducing device such as a video cassette recorder (VCR) in advance, and when a user selects a slow motion playback mode, a display device such as a television (Television) is used. The image was displayed on the screen in slow motion.

Therefore, in the related art, a separate video recording and reproducing apparatus is required, and in order to view the slow motion, it is inconvenient to go through various steps such as recording and reproducing the video signal. SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a method and apparatus for generating a slow motion signal to view slow motion without storing image information. Another object of the present invention is to provide a slow motion signal generation method and apparatus for generating a slow motion signal without storing image information and allowing the generated slow motion screen and the normal screen to be viewed simultaneously on a dual screen. A characteristic of the slow motion signal generation method according to the present invention for achieving the above object is a first step of obtaining a motion coefficient by comparing the current frame and the comparison target frame, and multiplying the obtained motion coefficient by a variable coefficient to the actual motion A second step of making a value smaller than a component; a third step of adding and storing a motion coefficient multiplied by the variable coefficient to a current frame; and a first step to a third step of a plurality of frames sequentially input After repeating the process, each of the stored frames is added and divided to generate a slow motion information. Features of the slow motion signal generating apparatus according to the present invention are: signal processing means for receiving a television signal and converting it into a signal for display on a screen, a frame buffer for storing the signal processed by the signal processing means; Distributing means for sequentially outputting the output of the frame buffer on a frame-by-frame basis, comparing the current frame output through the distributing means with a frame to be compared to obtain a motion coefficient, multiplying the obtained motion coefficient by a variable coefficient, and adding the result to the current frame. Motion coefficient finder means which is provided with a plurality of motion coefficient finders to store sequentially and the signal generation means for generating a slow motion signal by adding the frame information stored in the plurality of motion coefficient finders, respectively, and then calculating the average value. It is configured to include.

1 is a block diagram of an apparatus for generating a slow motion signal according to the present invention.

2 is a detailed block diagram of the slow motion generator of FIG.

3 is a detailed block diagram of the distribution part of FIG.

4 is a detailed block diagram of the motion coefficient finder of FIG.

5 is a table representing a process of generating slow motion image information according to the present invention.

6 is an exemplary view illustrating a case in which the display device is divided into left and right screens to make a dual screen according to the present invention.

7 is a diagram illustrating a frame of generating slow motion image information according to the present invention.

8A is a diagram illustrating a normal image information display process in units of frames.

8b is a view illustrating a slow motion image information display process in units of frames according to the present invention.

9A is a diagram showing normal image information display process using real data as an example.

9B is a diagram showing real data as an example of a slow motion image information display process according to the present invention.

* Explanation of symbols for the main parts of the drawings

11: tuner 12: Y / C separation unit

13: analog / digital converter 14: micom

15: digital video processing unit 16: slow motion generation unit

17: dual screen generator 18: digital / analog converter

21: frame buffer 22: distribution unit

23: first motion coefficient finder 24: second motion coefficient finder

25: third motion coefficient finder 26: adder

27: Divider 41: Comparator

42: multiplier 43, 45: frame memory

44: adder

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

1 is a block diagram of an apparatus for generating a slow motion signal according to the present invention. 1, an antenna for receiving a broadcast signal, a tuner 11 for tuning a channel by tuning a plurality of RF signals received through the antenna, according to a control signal, and a signal of a tuned channel The Y / C separation unit 12 and the Y / C separation unit 12 separating the luminance signal Y and the color signal C from the luminance signal Y and the color signal C, respectively. Analog / Digital Converter (ADC) 13 for converting to a digital converter, a microcomputer 14 for controlling the tuning of the tuner 11 according to a key input, and digitally under the control of the microcomputer 14, respectively. The digital video processing unit 15 processing the luminance signal from the converted color signal and outputting the composite video signal CV, and the composite video signal CV output from the digital video processing unit 15 under the control of the microcomputer 14. Slow output to output normal picture information (DCV) and slow motion picture information signal (SCV) The generator 16 generates a double window signal DWCV to display the normal image information DCV and the slow motion image information SCV of the slow motion generator 16 on a dual screen. The screen generation unit 17 and the DAC 18 converting the dual screen signal DWCV generated by the dual screen generation unit 17 into an analog signal and outputting the analog signal to the screen CPT of the display device. As shown in FIG. 2, the slow motion generator 16 continuously outputs the frame buffer 21 temporarily storing the digitally processed composite video signal CV and the digitally processed composite video signal CV. At the same time, a 2 by 4 distributor 22 and a distributor 22 for sequentially outputting the composite video signal stored in the frame buffer 21 in units of frames under the control of the microcomputer 14. A first motion factor is obtained by comparing the first frame information Inl and the second frame information In2 outputted from the second frame information Inl and the fourth frame when the first frame In1 is the fourth frame. The first motion coefficient finder 23 for outputting the information In3-1 and the second frame information In2 and the third frame information In3 output from the distribution unit 22 are compared with each other. The second motion of obtaining the motion coefficient and outputting the second frame information In2 to the first motion coefficient finder 23. The third frame information In3 is compared with the third frame information In3 and the fourth frame information In3-1 output from the number finder 24 and the distribution unit 22, and the third frame information In3 is obtained. An adder 26 that adds outputs of the third motion coefficient finder 25 output to the second motion coefficient finder 24, the first to third motion coefficient finders 23, 24, 25, and the adder And a divider 27 for dividing the output of the 26 by 3. The distributor 22 divides the composite video signal CV digitally processed by the digital video processor 15, as shown in FIG. In order to use the normal image information, the switching element SW1 continuously outputs without switching, and the composite video signal is switched every frame under the control of the microcomputer 14 and output from the frame buffer 21 to the first through Switch which sequentially outputs to the 3rd motion coefficient finder 23-25 The first motion coefficient finder 23 compares the first frame information In1 and the second frame information In2 in units of frames, as shown in FIG. 4. A comparator 41 for obtaining a motion coefficient, a frame memory 43 for storing first frame information In1 which is current image information output from the frame buffer 21, and a motion coefficient output from the comparator 41. A multiplier 42 which multiplies a variable coefficient W to make the motion coefficient output from the comparator 41 less than an actual motion component, and outputs the frame information stored in the frame memory 43 from the multiplier 42. An adder 44 that adds motion coefficients, a frame memory 45 that temporarily stores the output of the adder 44 and outputs the result to the adder 26 of FIG. 2, and turns on every multiple of three frames from the fourth frame. 3 Frame of Motion Coefficient Finder 26 Information is composed of the switching device (46) for output. Since the configurations of the second and third motion coefficient finders 24 and 25 are the same except for the switching element 46 in the first motion coefficient finder 23 illustrated in FIG. 4, description thereof is omitted. At this time, the frame memories of the first to third motion coefficient finders 23-25 output the frame information OUT1 to OUT3 multiplied by the variable coefficients at the same read timing under the control of the microcomputer 14 to the adder 26. do. In the present invention configured as described above, when a plurality of RF signals are received through the antenna Ant, the tuner 11 tunes one channel under the control of the microcomputer 14 and outputs it to the Y / C separation unit 12. The Y / C separator 12 separates the composite video signal of the channel tuned by the tuner 11 into a luminance signal Y and a color signal C through a filter process using correlation in the spatial domain, and converts the ADC 13 into an ADC 13. ) Converts the separated luminance signal Y and color signal C into digital signals and outputs the digital signals to the digital video processor 15. At this time, the sampling rate is set to 8 bits of luminance signal having a 4: 1: 1 ratio and 4 bits of color signal to suit signal processing. The digital video processor 15 completely removes the luminance component from the color signal C digitally converted under the control of the microcomputer 14, and outputs the luminance component to the slow motion generator 16, and the slow motion generator 16. Generates two signals. One is normal picture information (DCV), and the other is slow motion picture information (SCV). The two image information DCV and SCV are transferred to the dual screen generator 17 to be converted into a dual screen signal, and then converted into an analog signal by the DAC 18 and output to the screen CPT of the display device. In this case, the dual screen may be configured as a left screen and a right screen, or may be configured as a main screen and a sub picture (Picture In Picture; PIP). The former left and right screens are suitable for wide TVs with a ratio of 16: 9 as shown in FIG. 6, and the latter main and sub screens are suitable for general TVs with a ratio of 4: 3. At this time, the image and screen switching displayed on the left, right screen, or main and sub screens are selected by the user. Accordingly, the normal and slow motion signals of the TV currently received are simultaneously displayed on two screens of the TV screen divided into the left, right screen, or main and sub-screens, respectively. All control is made by the microcomputer 14. Meanwhile, the slow motion signal generation process of the slow motion generator 16 will be described in more detail with reference to FIGS. 2 to 9. That is, the image information CV digitally processed by the digital video processing unit 15 is continuously output through the switching element SW1 of the distribution unit 22 and stored in the frame buffer 21. At this time, the signal DCV continuously output through the switching element SW1 is normal image information, and the signal stored in the frame buffer 21 becomes slow motion image information SCV by signal processing. That is, the image information stored in the frame buffer 21 is output from the distribution unit 22 to the first to third motion coefficient finders 23-25 in order of frames. The distribution unit 22 sequentially switches the frame information stored in the frame buffer 21 in units of frames by switching to SW4-SW3-SW2-SW4-SW3-SW2 -... under the control of the microcomputer 14 every frame. To the first to third motion coefficient finders 23-25. First, the first frame information In1 output through the frame buffer 21 is input to the first motion coefficient finder 23 through the switching element SW4 of the distribution unit 22, and immediately after the second frame information ( In2) It is input to the second motion coefficient finder 24 through the switching element SW3 and transmitted to the first motion coefficient finder 23 at the same time. The comparing unit 41 of the first motion coefficient finder 23 compares the first frame information In1 and the second frame information In2 to obtain a motion coefficient. Here, the In1 line is a current frame input line and In2 is a frame input line to be compared. At this time, the first frame information In1, which is a current input, is input to the comparator 41 and stored in the frame memory 43 at the same time. The multiplier 42 multiplies the motion coefficient output from the comparator 41 by the variable coefficient W to make it less than the actual motion component and then outputs it to the adder 44. The variable coefficient W is for lowering motion compensation, and arbitrarily lowers the motion coefficient output from the comparator 41. That is, the variable coefficient W is set by the microcomputer 14 or to a value such as 1/2, 1/3 in advance. The adder 44 adds the motion coefficient output from the multiplier 42 to the first frame information In1 stored in the frame memory 43 and stores the motion coefficient in the frame memory 45. The frame memory 45 waits until the motion coefficients are obtained from the second and third motion coefficient finders 24 and 25, applied to the original frame, and output. Meanwhile, the third frame information In3 is input to the third motion coefficient finder 25 and simultaneously transferred to the second motion coefficient finder 24.

The second motion coefficient finder 24 compares the second frame information In2 and the third frame information In3 to obtain a motion coefficient, multiplies the obtained motion coefficient by the variable coefficient W, In addition to the second frame information, it is stored in the frame memory. The third motion coefficient finder 25 compares the third frame information In3 with the fourth frame information to obtain a motion coefficient, multiplies the obtained motion coefficient by the variable coefficient W, and adds the third frame information to the frame memory. Save it. Therefore, the image information produced by adding the original image information and the obtained motion coefficient to each other is output after three frames. That is, after each motion coefficient is added in the first to third motion coefficient finders 23-25, the first, second and third frame information OUT1 to OUT3 stored in each frame memory are simultaneously read. All are added at adder 26. The divider 27 divides the information into three frames and outputs the converted information. This image information will be image information whose motion is slowed down moderately. At this time, fourth, when the frame information is input, the frame information is transmitted to the first motion coefficient finder 23 and simultaneously to the third motion coefficient finder 25 through the switching element 46 of the first motion coefficient finder 23. At this time, the switching element 46 of the microcomputer 14 only when the 4th, 7th, 10th ... th frame is input, that is, only when the frame information is input to the first motion coefficient finder 23 after the 4th frame. It is turned on by the control and turned off otherwise. Therefore, the third motion coefficient finder 25 compares the third frame information In3 and the fourth frame information to obtain a motion coefficient, multiplies the obtained motion coefficient by the variable coefficient W, and then adds the frame to the third frame information. Store in memory. The adder 26 simultaneously reads and adds the first and third frames stored in the frame memories of the first to third motion coefficient finders 23-25, and divides the average value by dividing by three in the divider 27. By this, the first slow motion frame information FF1 is output. When the fifth frame is input, since the second motion coefficient finder 24 is cleared, the second motion coefficient finder 24 is input to the second motion coefficient finder 24 through the switching element SW3 of the distribution unit 22 and the first motion coefficient finder ( 23) is delivered. Therefore, the first motion coefficient finder 23 compares the fourth frame information with the fifth frame information to obtain a motion coefficient, multiplies the obtained motion coefficient by the variable coefficient W, and stores the same in the frame memory in addition to the fourth frame information. do. The adder 26 simultaneously reads and adds the second, third, and fourth frames stored in each frame memory of the first to third motion coefficient finders 23-25, and divides the third by two in the divider 27. Outputs the slow motion frame information FF2.

The same applies to subsequent frames. That is, the above process is recursive, so that an increase in memory can be suppressed. The slow motion video signal SCV can be obtained after three frames by the above method. FIG. 5 is a formula of a process that is performed in units of frames, and normal image information is continuously processed in the order of F1, F2, F3, F4, F5, ..., and slow motion image information is FF1, FF2, FF3, It continues in the order of FF4, FF5, ... At this time, the slow motion image information (FF1, FF2, ...) is output after three frames compared with the normal signal. That is, the slow motion generator 16 generates a slow motion signal when the normal signals F1, F2, and F3 are output, and outputs the first slow motion frame information FF1 when the normal signal F4 is output. At this time, the values of the motion adaptation coefficients a, b, and c change from frame to frame, and the portion occupied when the FF signal is generated varies. For example, when the normal picture frame is F4, the slow motion picture frame becomes FF1. The motion adaptation coefficients a, b, and c are multiplied by the normal picture data, respectively, and have a form of a b c. Here, a, b, and c are values obtained by multiplying the variable coefficients W by the motion coefficient values output from the first to third motion coefficient finders 23-25, and a denotes the first motion coefficient finder 23. Is the motion adaptation coefficient output from the multiplier 44, b is the second motion coefficient finder 24, and c is the motion adaptation coefficient output from the third motion coefficient finder 25. That is, the frame data to be displayed after three frames is F1, but motion information FF1 close to F1 is generated and outputted so as to be combined with F2 and F3, which are the data after F1. In addition, FF2 output after FF1 may also be frame data having motion information closer to FF1 than to F2. As shown in FIG. 7, the slow motion frame information FF1 is generated by the combination of the normal frame information F1, F2, F3, and the slow motion frame information FF2 is created by the combination of the normal frame information F2, F3, F4. It is shown that the slow motion frame information FF3 is generated by the combination of the frame information F3, F4, and F5. In this case, the normal image information is shown as in FIG. 8 (a), and is generated after the delay of three frames. Slow motion picture information as shown in (b) and a double screen starting from the fourth frame F4 are simultaneously displayed as shown in FIG. In FIG. 8, the dotted line box indicates the minimum time required for the slow motion screen, and the normal screen is normally displayed in this section, but the slow motion screen is not displayed in the screen. FIG. 9 (a) shows a case in which the bar rises upward from the horizontal state at a normal speed, and it can be seen that the bar rises rapidly from the first frame F1 to the fifth frame F5. When comparing slow motion picture information such as FIG. 9 (b) generated by the present invention with normal picture information of FIG. 9 (a), the motion from the first frame FF1 to the fifth frame FF5 is shown in FIG. 9 (a). Rather than). The spread of the screen that can actually occur during remake of the motion can accurately produce the slow motion of the screen by accurately calculating the motion coefficient.

As described above, according to the method and apparatus for generating a slow motion signal according to the present invention, a motion coefficient is obtained by comparing a current frame with a frame to be compared, and the motion coefficient is added to the original frame by multiplying the obtained motion coefficient by a variable coefficient. The slow motion signal is generated by adding and dividing the applied frame after applying the adding process to a predetermined frame, so that the slow motion can be viewed without storing image information. In addition, the slow motion screen generated without storing the image information can be viewed through the dual screen simultaneously with the normal screen.

Claims (10)

A first step of obtaining a motion coefficient by comparing a current frame with a frame to be compared; a second step of multiplying the obtained motion coefficient by a variable coefficient to a value less than an actual motion component; and a motion in which the variable coefficient is multiplied by a current frame. A third step of adding and storing coefficients and a step of generating slow motion information by adding and storing all the stored frames after repeating the processes from the first step to the third step on a plurality of frames sequentially input; Slow motion signal generation method characterized in that consisting of four steps in order. The method of claim 1, wherein the frame to be compared in the first step is a frame input after a current frame. Signal processing means for receiving a television signal and converting it into a signal for display on a screen; A frame buffer for storing the signal processed by the signal processing means; Distribution means for sequentially outputting the frame buffer output in units of frames; A motion coefficient finder is obtained by comparing a current frame output through the distribution means with a frame to be compared, multiplying the obtained motion coefficient by a variable coefficient, adding the current coefficient to the current frame, and storing the motion coefficient. Applied motion coefficient finder means; And a signal generating means for generating a slow motion signal by adding frame information stored in the plurality of motion coefficient finders, respectively, and obtaining an average value. The apparatus of claim 3, wherein the frame to be compared of the motion coefficient finder is a frame input after a current frame. 4. The apparatus of claim 3, wherein the motion coefficient finder comprises: a comparator for comparing the current frame information with the next frame information, which is a frame to be compared, on a frame basis to obtain a motion coefficient; a frame memory for storing the current frame information; A multiplier for multiplying the output motion coefficient by a variable coefficient to make the motion coefficient output from the comparator smaller than an actual motion component, an adder for adding the motion coefficient output from the multiplier to the frame information stored in the frame memory, and the adder Slow motion signal generator, characterized in that the frame memory for storing the output of the. The apparatus of claim 3, wherein the frame information stored in each of the plurality of motion coefficient finders is simultaneously output, added, and divided. The apparatus of claim 3, wherein the slow motion signal is simultaneously displayed on a dual screen together with a normal signal. The apparatus of claim 7, wherein the dual screen comprises a left screen and a right screen. The apparatus of claim 7, wherein the dual screen comprises a main screen and a sub-screen. The apparatus of claim 3, wherein the slow motion screen information is delayed by a predetermined time than the normal screen information.