KR20100018162A - Method of playing video contents by using skip function and method of generating thumbnail image by using skip function - Google Patents

Abstract

PURPOSE: A method of playing video contents by using a skip function and a method of generating a thumbnail image by using the skip function are provided to play the video contents from a part in which a user wants. CONSTITUTION: A start play of the video contents is selected(S110). The color distribution of a key frame comprising the video contents is analyzed(S120). The video contents skip to the key frame which is located after the specified time from the key frame, when the color distribution of the key frame is subcritical(S132). The video contents are the video contents compacted to a MPEG mode.

Description

Quick video playback using skip function and video thumbnail generation method using skip function {METHOD OF PLAYING VIDEO CONTENTS BY USING SKIP FUNCTION AND METHOD OF GENERATING THUMBNAIL IMAGE BY USING SKIP FUNCTION}

The present invention relates to a video playback method and a video thumbnail generation method, and more particularly, to a quick video playback method using a skip function to be able to play the video quickly by skipping the meaningless content included in the video and The present invention relates to a video thumbnail generation method.

Advances in multimedia technology and mass storage devices have led to hardware and software technologies that make it easy to play and watch video content anytime, anywhere.

For example, video content encoded using a highly efficient video compression technique represented by the Motion Pictures Expert Group (MPEG) recorded on a high capacity optical storage medium, such as DVD, Blu-ray, HD-DVD, etc. Reproducible devices are due to the development of such multimedia technology and mass storage technology.

In addition, portable devices of recent mobile communication terminals, portable multimedia players (PMPs), and MP3 players have functions of storing video contents in a high-capacity storage device mounted therein and decoding and playing them in real time. It includes everything.

Similarly, devices that can play video content encoded by video compression techniques, such as IPTV, by streaming or download and play (DnP) methods have already expanded their lives.

On the other hand, in the case of playing video content on such devices, one of the inconveniences of the user is that the video content to be played does not have to be played back and watched by the user, whether in encoding or content problems. Is to include the contents.

That is, an interval portion that does not need to be played back to the user may be included in the front portion of the video content or the middle portion of the video content. For example, a content composed of a single color (eg, black) may last for several seconds at a beginning portion of the video content, and a content composed of a single color may last for several seconds even in the middle of the video content.

In general, in such a situation, the user can skip and play the part using an interface such as a fast forward function (FF) provided by the playback device or a slide bar that can adjust the playback time. However, it is not possible to precisely adjust the playback time by the quick send function or the slide bar, and sometimes the part that needs to be skipped is played more than necessary. Sometimes you find a place to start.

In addition, recent video playback devices have a function of providing a list of video contents that can be played back using a thumbnail image. However, the generation of such thumbnail images has the same problem as that of the above-described video playback.

In other words, the current thumbnail image is a method of randomly extracting one image from the beginning of the video, but in this case, a single color interval part that is generally included in the front of the video is extracted as a thumbnail image, and the thumbnail image is used. There is a problem that it is difficult to use for the purpose of confirming the content of the video content in advance.

An object of the present invention for solving the above problems, it is possible to automatically skip the part containing unnecessary content during the playback of the video content, the user can quickly play from the necessary part, fast video playback using the skip function To provide a method.

Another object of the present invention for solving the above problems is to generate a thumbnail image that can accurately represent the content of the video content by automatically skipping the portion containing unnecessary content when generating a thumbnail image corresponding to the video content To provide a way.

According to an aspect of the present invention for achieving the above object, the step of selecting the start of playback of the video content, analyzing the color distribution of the key frame constituting the video content (a) and the color distribution of the analyzed key frame If (b) is less than or equal to a predetermined threshold, step (b) of skipping from the key frame to a key frame located after a predetermined time interval, and the steps (a) and (b) for the frame located after the predetermined time interval. It provides a fast playback method of the video using the skip function, characterized in that for repeating.

Here, the video content may be MPEG compressed video content. In this case, the key frame to be analyzed the color distribution may be an I frame constituting the video content.

The analyzing of the color distribution may include generating a color histogram of the key frame, calculating a distribution value of the color histogram, and skipping to a key frame located after a predetermined time interval from the key frame. When the distribution value of the color histogram is less than or equal to the predetermined threshold, the color histogram may be configured to skip to a key frame located after a predetermined time interval of the key frame.

According to another aspect of the present invention for achieving the above object, the step of selecting the start of the playback of the video content, the color distribution of the first key frame constituting the video content and the second position located after a predetermined time interval from the first key frame Analyzing the color distribution of the second key frame (a) and comparing the color distribution of the first key frame with the color distribution of the second key frame, wherein the difference in the color distribution between the first and second key frames is equal to or less than a predetermined threshold; And (b) skipping to the third key frame located after the predetermined time interval from the second key frame, and for the fourth frame located after the predetermined time interval from the third frame and the third frame. Provided is a method of quickly playing a video using a skip function, wherein steps (a) and (b) are repeated.

Here, the video content may be MPEG compressed video content. In this case, the first to fourth frames, which are targets for analyzing the color distribution, may be I frames constituting the video content.

The analyzing of the color distribution may include creating color histograms of the first key frame and the second key frame, and skipping to the third key frame may include: color histogram of the first key frame. And contrasting the color histogram of the second key frame, and if the difference between the color histogram of the first key frame and the color histogram of the second key frame is less than or equal to a predetermined threshold, after a predetermined time interval from the second key frame. And skip to a third key frame located.

According to an aspect of the present invention, a video content for generating a thumbnail image is selected, analyzing a color distribution of a key frame constituting the video content, and a color distribution of the analyzed key frame. If is less than a predetermined threshold, the step of analyzing the color distribution repeatedly skips to the key frame located after a predetermined time interval from the key frame, and the color distribution of the analyzed key frame is greater than a predetermined threshold The present invention provides a method of generating thumbnails of a video using a skip function of reducing a image included in the key frame to generate a thumbnail image.

According to another aspect of the present invention for achieving the above object, the step of selecting a video content to generate a thumbnail image, after the color distribution of the first key frame constituting the video content and a predetermined time interval from the first key frame Analyzing the color distribution of the located second key frame and comparing the color distribution of the first key frame with the color distribution of the second key frame when the difference in the color distribution between the first and second key frames is equal to or less than a predetermined threshold. Skipping from the second key frame to a third key frame located after a predetermined time interval, analyzing the color distribution with respect to the third frame and a fourth frame located after a predetermined time interval from the third frame. And if the difference in color distribution between the first and second key frames is equal to or greater than a predetermined threshold, A thumbnail generation method of a video using a skip function of reducing a image included in a first key frame and / or a second key frame to generate a thumbnail image is provided.

When using the quick video playback method according to the present invention as described above, it is possible to skip the playback for a monochrome image or a still image that the user does not want to watch, so that the user can quickly play the video from the part that needs to watch You can configure the video playback method. Therefore, when the video reproducing method according to the present invention is adopted in a video reproducing apparatus such as a mobile communication terminal, a PMP, an IPTV set-top box, or an MP4 player, or applied to a video reproducing software, the user's convenience can be improved.

In addition, when using the thumbnail generation method according to the present invention as described above, it is possible to exclude the monochrome image that does not properly represent the content of the video content and to generate a thumbnail image corresponding to the content of the video content.

As the invention allows for various changes and numerous embodiments, particular embodiments will be illustrated in the drawings and described in detail in the written description. However, this is not intended to limit the present invention to specific embodiments, it should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention. Like reference numerals are used for like elements in describing each drawing.

Terms such as first, second, A, and B may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be referred to as the second component, and similarly, the second component may also be referred to as the first component. The term and / or includes a combination of a plurality of related items or any item of a plurality of related items.

When a component is referred to as being "connected" or "connected" to another component, it may be directly connected to or connected to that other component, but it may be understood that other components may be present in between. Should be. On the other hand, when a component is said to be "directly connected" or "directly connected" to another component, it should be understood that there is no other component in between.

The terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting of the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this application, the terms "comprise" or "have" are intended to indicate that there is a feature, number, step, action, component, part, or combination thereof described in the specification, and one or more other It is to be understood that the present invention does not exclude the possibility of the presence or the addition of features, numbers, steps, operations, components, parts, or a combination thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art. Terms such as those defined in the commonly used dictionaries should be construed as having meanings consistent with the meanings in the context of the related art and shall not be construed in ideal or excessively formal meanings unless expressly defined in this application. Do not.

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

First embodiment of the video playback method

1 is a flowchart illustrating a first embodiment of a quick video playback method using a skip function according to the present invention.

The first embodiment of the video reproducing method according to the present invention determines whether a key frame constituting the video has a color distribution close to a single color, and the key frame has a color distribution close to a single color. If it is determined that the playback is determined, the playback is skipped to a key frame located after a predetermined time interval from the corresponding key frame.

Referring to FIG. 1, in a first embodiment of a video playing method according to the present invention, selecting a start of playing video content (S110), analyzing a color distribution of a key frame constituting the video content. When the color distribution of the analyzed key frame is less than a predetermined threshold (S120) and a predetermined threshold (threshold), it may comprise a step (S130) to skip to a key frame located after a predetermined time interval from the key frame. .

In addition, after the step (S130) it is configured to perform repeatedly from the step (S120) for analyzing the color distribution of the key frame for the key frame located behind the predetermined time interval.

In this case, the video content may be video content compressed by a moving picture expert group (MPEG) method. In this case, the 'key frame' may be an I frame constituting the MPEG stream.

2 is a conceptual diagram illustrating the configuration of an MPEG stream.

Referring to FIG. 2, one GOP (Group of Pictures) 200 constituting an MPEG stream includes an I frame 201 serving as a key frame and a P frame forward predicted from the I frame 201. 202, 203 and B frames 204, 205, 206, 207, 208, and 209 that are bidirectionally predicted from the I frame 201 and the P frame 202, 203. .

In the case of the I frame 201, it means a frame that is encoded using only the information of the frame (Intra Frame) to guarantee the independence of the GOP 200 to which the I frame 201 belongs and for random access. . That is, in the case of an I frame, the frame is generated without using inter frame prediction.

On the other hand, the P frames 202 and 203 are frames generated by performing forward prediction from the I frame 201 or the previous P frame, and the B frames 204 to 209 perform bidirectional prediction on the I frame and the P frame. The resulting frame.

Therefore, in the video reproducing method according to the present invention, 'key frame', which is a target of color distribution analysis, means an I frame which holds all information on the frame image.

Referring to FIG. 1, in step S110 of selecting to start playback of the video content, the user selects content to be played back from a list of playable video content and starts playback.

 Next, analyzing the color distribution of the key frame constituting the moving image content (S120) is a step of analyzing the color distribution of the key frame constituting the moving image content, the start of the playback is selected, typically The analysis starts from the first key frame.

However, the step S120 of analyzing the color distribution of the key frame is not necessarily started from the first key frame constituting the selected video content, and if the user starts playback from a specific portion of the video content. If so, the step S120 of analyzing the color distribution from the first key frame that comes from the start of the playback may be started.

In this case, the analyzing of the color distribution of the key frame (S120) may be performed by generating a color histogram of the corresponding key frame and calculating a dispersion value of the created color histogram. Here, the color histogram is derived by counting the color values (R, G, and B values representing the colors of the pixels) of the pixels constituting the key frame image for each color value section.

In this case, the color histogram may be created only for one color value (eg, B) among the color values (R, G, B) of the pixels constituting the key frame image, and the three color values (R, G, B) are combined. Can also be created for color values.

In addition, the color value system may be applied not only to the R, G, and B systems but also to the case of using a color value system composed of luminance signals and color difference signals, such as a YUV system (or YCbCr system).

Meanwhile, the color histogram may be created for all pixel values included in an image constituting a key frame, but may be created for pixels sampled according to a predetermined rule in order to improve processing speed. For example, if the key frame image is composed of 320 x 240 resolution, one pixel among four pixels may be sampled to create a color histogram. That is, an image having a 320 × 240 resolution may generate a color histogram for only 80 × 60 pixels by taking one pixel for 4 × 4 pixels.

3A and 3B are conceptual views of key frames in which a color distribution is analyzed in the first embodiment of the video reproducing method according to the present invention.

That is, FIG. 3A illustrates a key frame image 310 with a color distribution biased to a single color and a color histogram 320 corresponding to the key frame image (in FIGS. 3A and 3B, only the color histogram for the B value is shown in FIGS. 3A and 3B). 3B illustrates an image 330 having a wide color distribution as a key frame image having various colors and a color histogram 340 corresponding to the image.

For example, the variance value of the color histogram 320 corresponding to the key frame image 310 illustrated in FIG. 3A is significantly higher than the variance value of the color histogram 340 corresponding to the key frame image 330 illustrated in FIG. 3B. It will have a low value.

That is, in the step S120 of analyzing the color distribution of the key frame, the color histogram of the key frame image is calculated, and as the variance value is smaller, the key frame image is closer to a single color image.

Next, the step (S130) of skipping to the key frame located after a predetermined time interval from the key frame is that the color distribution (that is, the variance of the color histogram) of the key frame calculated in the step 120 is less than a predetermined threshold. In operation S131, when the recognition result is less than or equal to a predetermined threshold, it is determined that the corresponding key frame is an image close to a single color, and playback is skipped to a key frame located after a predetermined time interval from the corresponding key frame (S132). If the color distribution of the key frame calculated in step 120 is greater than or equal to a predetermined threshold value, playback is continued in accordance with a general procedure (S140).

In this case, the key frame located after the predetermined time interval may be a key frame 211 located in the GOP immediately after the key frame arbitrary GOP whose color distribution has been analyzed, or may be a key frame skipped several steps. For example, if a video composed of 30 frames per second includes three key frames per second, the playback skips about 0.33 seconds (1 sec / 3 frames) if the playback skips to the next key frame. Or if you skip playback to the next key frame, you will skip playback for 0.66 seconds. That is, the predetermined time interval for skipping playback can be arbitrarily selected by the user.

In addition, the predetermined threshold may also be arbitrarily selected by the user. For example, the higher the value selected as the predetermined threshold, the greater the number of objects of the skipped key frame, and the lower value selected as the predetermined threshold, the smaller the object of the skipped key frame.

Finally, after the step S130, the method for reproducing the video is repeatedly performed from the step S120 of analyzing the color distribution of the key frame with respect to the key frame located after the predetermined time interval.

Second embodiment of the video playback method

4 is a flowchart illustrating a second embodiment of a method for quickly playing a video using the skip function according to the present invention.

According to a second exemplary embodiment of a video reproducing method according to the present invention, there is no difference in color distribution between two key frames in contrast to the color distribution of a key frame constituting a video and a key frame located after a predetermined time interval from the key frame. Can be configured in such a way as to skip playback.

That is, in the case of the first embodiment described above, the color distribution of the key frame image is analyzed based on the color distribution value of one key frame, and playback is skipped when it is close to a single color. If no color change between the key frames is found (i.e., it is likely to be a still image), it corresponds to a method of skipping playback.

Referring to FIG. 4, in a first embodiment of a video playing method according to the present invention, selecting a start of playing video content (S410), a color distribution of a first key frame constituting the video content and the first Analyzing the color distribution of the second key frame located after a predetermined time interval from the key frame (S420) and comparing the color distribution of the first key frame with the color distribution of the second key frame; If the difference in color distribution is less than or equal to a predetermined threshold, step S430 may be skipped from the second key frame to a third key frame located after a predetermined time interval. If the difference in the color distribution between the first and second key frames calculated in step 420 is greater than or equal to a predetermined threshold, playback is continued in accordance with a general procedure (S140).

In addition, after the step S430, the steps (a) and (b) may be repeatedly performed on the third frame and a fourth frame located after a predetermined time interval from the third frame.

Meanwhile, even in the second embodiment, as described with reference to FIG. 2, the video content may be video content compressed by the MPEG method, and the first to fourth key frames may be I frames constituting the MPEG stream. Since the same is the same, description thereof will be omitted.

Referring to FIG. 4, the step (S410) of selecting to start playback of the video content is the same as the step (S110) of the first embodiment described in FIG. 1, and thus description thereof is omitted.

 Next, step S420 is a step of analyzing the color distribution of the first key frame constituting the moving image content and the color distribution of the second key frame located after a predetermined time interval from the first key frame.

In this case, the first frame may typically be the first key frame of the selected video content. However, like the first embodiment, the first frame is not necessarily limited to the first key frame constituting the selected video content. If the user has selected to start playback from a specific portion of the video content, the first key frame that comes first from the start of the playback may be the first key frame.

In addition, the second key frame may be a key frame located after a predetermined time interval from the first key frame and may be a key frame immediately after the first key frame, or may be a key frame skipped several steps. For example, if the video content is 30 frames per second and 3 key frames per second, if the key frame belonging to the GOP immediately after the GOP to which the first frame belongs is the second key frame, 0.33 seconds after the first key frame The key frame may be the second key frame.

In this case, the analyzing of the color distribution (S420) may be performed by creating a color histogram of the first key frame and the second key frame. Since the color histogram and the description related to the drawing thereof are the same as in the first embodiment, a description thereof will be omitted.

After the step S420, the color distribution of the first key frame and the color distribution of the second key frame are contrasted (S421), and when the color distribution difference between the first and second key frames is equal to or less than a predetermined threshold, A step S430 of skipping from the two key frames to the third key frame located after a predetermined time interval is performed.

If the color distribution of the first key frame and the color distribution of the second key frame are prepared as color histograms, the process of contrasting the color distribution of the first key frame with the color distribution of the second key frame may include: The difference between the color histogram and the color histogram of the second key frame may be obtained.

For example, if the difference histogram of the color histogram of the second key frame is calculated from the color histogram of the first key frame, the degree of change in the color distribution of the first key frame and the color distribution of the second key frame can be grasped. More specifically, it is possible to determine the degree of change in the color distribution of the first key frame and the color distribution of the second key frame by calculating the distribution of the difference histogram or the total sum of the difference histograms.

5A and 5B are conceptual views of first and second key frames in which a color distribution is analyzed in a second embodiment of a video reproducing method according to the present invention.

That is, FIG. 5A illustrates a case where there is almost no color change or an included object change between the first key frame (left image) 510 and the second key frame (right image) 520. When the difference histogram 550 of the color histogram 530 of the first key frame and the color histogram 540 of the second key frame is calculated, the total or distribution value of the difference histogram will have a very low value.

Next, FIG. 5B illustrates a case where there are many changes in color or included objects between the first key frame (left image) 610 and the second key frame (right image) 620. When the difference histogram 650 of the color histogram 630 of the key frame and the color histogram 640 of the second key frame is calculated, the total or distribution value of the difference histogram is relatively higher than that of FIG. 5A (550). It will have a large value.

When the difference in the color histogram is small compared to the color histogram of the first key frame and the color histogram of the second key frame calculated in the step S420 of analyzing the color distribution of the key frame, We can see that change of 2 key frames is small.

That is, the step (S430) of skipping from the key frame to a key frame located after a predetermined time interval determines whether the difference in the color distribution (that is, the dispersion value of the color histogram) of the first and second key frames is equal to or less than a predetermined threshold. If it is less than or equal to the predetermined threshold, the step of skipping playback from the corresponding key frame to the third key frame located after the predetermined time interval. In this case, the meaning of the 'predetermined time interval' is as described above, and a predetermined time interval for skipping playback may be arbitrarily selected by the user.

In addition, the predetermined threshold may also be arbitrarily selected by the user. For example, the higher the value selected as the predetermined threshold, the greater the number of objects of the skipped key frame, and the lower the value selected as the predetermined threshold, the smaller the object of the key frame being skipped.

On the other hand, in the second embodiment of determining whether to skip using a change between key frames, only an object included in the key frame may be moved and there is little change in color. The predetermined threshold should be chosen as a relatively low value.

Finally, after the step S430, the color of the key frame with respect to the third key frame located after the predetermined time interval from the second key frame and the fourth key frame located after the predetermined time interval from the third key frame. Starting from analyzing the distribution (S420), the video playback method is repeatedly performed.

How to create thumbnails of video content

6A and 6B are flowcharts illustrating a method for generating thumbnails of video content according to the present invention.

The thumbnail generation method of the video content described with reference to FIG. 6A is a method of generating a thumbnail image of the video content by using the video skip method described in the first embodiment of the fast playback method of the video content described with reference to FIG. 1.

Referring to FIG. 6A, in operation S610 of selecting a video content for generating a thumbnail image, analyzing a color distribution of a key frame constituting the video content in operation S620. -1) and when the color distribution of the analyzed key frame is less than or equal to a predetermined threshold, the step of analyzing the color distribution is repeatedly performed by skipping from the key frame to a key frame located after a predetermined time interval. When the color distribution of the key frame is greater than or equal to a predetermined threshold, the method may include a step (S630-1) of reducing the image included in the key frame to generate a thumbnail image.

Here, step S610 is a step of selecting video content to generate a thumbnail image, unlike step S110 of selecting to start playback of video content described with reference to FIG. 1. That is, when generating a list of moving picture contents or selecting moving picture content, moving picture contents to be provided as thumbnails for preview purposes are selected. For example, in the case of providing a list of video contents that can be played back, such as a function such as a video album of a mobile communication terminal, it is necessary to provide a thumbnail image for checking the contents of the video contents in advance. A user selects a video content to be generated, or a step selected by a program to receive a user's selection.

Next, analyzing the color distribution of the key frame constituting the video content (S620-1) may be configured in the same manner as the step (S120) in the first embodiment of the video playback method illustrated in FIG. Description is omitted.

Similarly, in step S630-1, when the color distribution of the key frame analyzed in step S620-1 is equal to or less than a predetermined threshold, the color distribution is analyzed by skipping from the key frame to a key frame located after a predetermined time interval. It is configured to repeatedly perform the step (S620-1).

On the other hand, when the color distribution of the key frame analyzed in step S620-1 is greater than or equal to a predetermined threshold, the thumbnail image is generated for the image included in the key frame. That is, in the case of the video playback method illustrated in FIG. 1, step S140 is performed when the color distribution of the analyzed key frame is greater than or equal to a predetermined threshold (S140). However, in the thumbnail generation method, the color distribution of the key frame is performed. Is different from that in the case where is equal to or greater than a predetermined threshold, a thumbnail image for a corresponding key frame is generated.

Another embodiment of the method for generating a thumbnail of the video content described with reference to FIG. 6B generates a thumbnail image of the video content by using the video skip method described in the second embodiment of the fast playback method of the video content described with reference to FIG. 4. That's how.

Referring to FIG. 6B, in the method of generating a thumbnail of moving image content, selecting moving image content to generate a thumbnail image (S610), and selecting a color distribution of a first key frame constituting the moving image content and the first key frame. Analyzing the color distribution of the second key frame located after the time interval (S620-2) and comparing the color distribution of the first key frame with the color distribution of the second key frame, the color between the first and second key frames If the distribution difference is less than or equal to a predetermined threshold, a jump is made from the second key frame to a third key frame located after a predetermined time interval, and for the fourth frame located after the predetermined time interval from the third frame and the third frame. Analyzing the color distribution repeatedly, and if the difference in the color distribution between the first and second key frames is greater than or equal to a predetermined threshold The first by reducing the images contained in the key frame and / or the second key frames can comprise a step (S630-2) to generate a thumbnail image.

Here, since step S610 has been described above, a description thereof will be omitted.

Next, analyzing the color distribution of the first key frame and the color distribution of the second key frame located after a predetermined time interval from the first key frame (S620-2) is the second method of the video reproducing method illustrated in FIG. Since it may be configured in the same manner as the step S420 in the embodiment, description thereof will be omitted.

Similarly, in step S630-2, when the color distribution difference between the first and second key frames analyzed in step S620-2 is less than or equal to a predetermined threshold, the third key frame located after a predetermined time interval from the key frame; It is configured to repeat the step (S620-2) of analyzing the color distribution with respect to the fourth frame located after the predetermined time interval from the third frame.

On the other hand, when the difference in the color distribution between the first and second key frames analyzed in step S620-2 is greater than or equal to a predetermined threshold, a thumbnail image is generated for an image included in the corresponding key frame. That is, in the video playback method illustrated in FIG. 4, when the difference in the color distribution between the first and second key frames is equal to or greater than a predetermined threshold, step S440 is performed according to a general procedure. However, in the thumbnail generation method, The difference is that a thumbnail image is generated using the first key frame and / or the second key frame.

Although described above with reference to a preferred embodiment of the present invention, those skilled in the art will be variously modified and changed within the scope of the invention without departing from the spirit and scope of the invention described in the claims below I can understand that you can.

1 is a flowchart illustrating a first embodiment of a quick video playback method using a skip function according to the present invention.

2 is a conceptual diagram illustrating the configuration of an MPEG stream.

3A and 3B are conceptual views of key frames in which a color distribution is analyzed in the first embodiment of the video reproducing method according to the present invention.

4 is a flowchart illustrating a second embodiment of a method for quickly playing a video using the skip function according to the present invention.

5A and 5B are conceptual views of first and second key frames in which a color distribution is analyzed in a second embodiment of a video reproducing method according to the present invention.

6A and 6B are flowcharts illustrating a method for generating thumbnails of video content according to the present invention.

Claims (10)

Selecting start of playback of video content; Analyzing a color distribution of a key frame constituting the moving image content (a); And If the color distribution of the analyzed key frame is less than or equal to a predetermined threshold, step (b) of skipping from the key frame to a key frame located after a predetermined time interval, And (b) repeating steps (a) and (b) for frames located after the predetermined time interval. The method of claim 1, The video content is a video playback method using a skip function, characterized in that the MPEG (MPEG) compressed video content. The method of claim 2, And a key frame to be analyzed as the color distribution is an I frame constituting the video content. The method of claim 1, Analyzing the color distribution is a step of calculating the distribution value of the color histogram by creating a color histogram of the key frame, The step of skipping to the key frame located after the predetermined time interval from the key frame is to skip to the key frame located after the predetermined time interval of the key frame when the distribution value of the color histogram is less than or equal to the predetermined threshold. Quickly play back video using the skip function. Selecting start of playback of video content; (A) analyzing a color distribution of a first key frame constituting the moving image content and a color distribution of a second key frame located after a predetermined time interval from the first key frame; And In contrast to the color distribution of the first key frame and the color distribution of the second key frame, when the difference in the color distribution between the first and second key frames is equal to or less than a predetermined threshold, the second key frame is located after a predetermined time interval. Skipping to the third key frame (b),  And repeating steps (a) and (b) for the third frame and a fourth frame located after a predetermined time interval from the third frame. The method of claim 5, The video content is a video playback method using a skip function, characterized in that the MPEG (MPEG) compressed video content. The method of claim 6, The first to the fourth frame to be analyzed the color distribution is I frames constituting the video content, characterized in that the rapid playback method of the video using the skip function. The method of claim 5, The analyzing of the color distribution may include creating color histograms of the first key frame and the second key frame. The step of skipping to the third key frame may include comparing the color histogram of the first key frame with the color histogram of the second key frame, and comparing the color histogram of the first key frame with the color histogram of the second key frame. If the difference is less than a predetermined threshold, skipping from the second key frame to a third key frame located after a predetermined time interval. Selecting video content for generating a thumbnail image; Analyzing a color distribution of a key frame constituting the video content; And When the color distribution of the analyzed key frame is less than or equal to a predetermined threshold, the step of analyzing the color distribution is repeatedly performed by skipping from the key frame to a key frame located after a predetermined time interval. If a color distribution is greater than a predetermined threshold, thumbnail generation method of the video using the skip function to reduce the image included in the key frame to generate a thumbnail image. Selecting video content for generating a thumbnail image; Analyzing a color distribution of a first key frame constituting the moving image content and a color distribution of a second key frame located after a predetermined time interval from the first key frame; And In contrast to the color distribution of the first key frame and the color distribution of the second key frame, when the difference in the color distribution between the first and second key frames is equal to or less than a predetermined threshold, the second key frame is located after a predetermined time interval. Skipping to the third key frame, repeatedly analyzing the color distribution with respect to the third frame and a fourth frame located after a predetermined time interval from the third frame, and performing a step between the first and second key frames. And generating a thumbnail image by reducing an image included in the first key frame and / or the second key frame when the color distribution difference is greater than or equal to a predetermined threshold.

Images