KR20220035695A - Method and system for requesting thumbnail for seeking of live video being played - Google Patents

Abstract

A method and system for requesting a thumbnail for searching a live video being played are disclosed. Calculating the minimum unit of time of the live image that can be moved according to the user's input based on the length of the navigation bar for the thumbnail request live image and the live duration of the live image according to an embodiment, the user's A step of correcting the viewpoint of the live image moved according to the input to any one of values determined by the calculated minimum unit of time and multiples of n, and requesting a thumbnail corresponding to the corrected viewpoint. may include.

Description

Method and system for requesting thumbnails for navigation of live video being played {METHOD AND SYSTEM FOR REQUESTING THUMBNAIL FOR SEEKING OF LIVE VIDEO BEING PLAYED}

The explanation below relates to a method and system for requesting a thumbnail for navigation of a live video being played.

In the past, when talking about Internet video, most people thought of VOD (Video On Demand), but recently, the market share of real-time streaming video (hereinafter referred to as 'live video') is rapidly increasing. Thumbnails for Internet videos represent specific frames of Internet videos as still images smaller than the original size for purposes such as summarizing, browsing, or seeking the Internet video.

At this time, the thumbnail provided for searching the live video during playback of the live video is different from the VOD thumbnail because the thumbnail corresponding to the specific playback position on the seeking bar of the live video is received from the server through a URL request. There is a problem that the amount of requests for is very large and the update of images for thumbnails is slow.

[Prior art literature]

Korean Patent Publication No. 10-2010-0055946

Thumbnail allows you to control the number of times a thumbnail is requested from the server by adjusting the unit time for requesting a thumbnail of the live video being played based on the display density of the video player screen and the size of the video player's seeking bar. Provides request method and system.

Thumbnails received from the server are cached and utilized, but if a cache hit is not achieved, the number of times a thumbnail is requested from the server can be controlled by searching and providing the cached thumbnail within a time range determined based on the adjusted unit time. Provides a method and system for requesting thumbnails.

Provides a thumbnail request method and system that can control the number of times thumbnails are requested from the server by requesting and/or canceling requests for thumbnails in blocks.

By removing thumbnail requests for duplicate positions in the navigation bar, we provide a thumbnail request method and system that can control the number of times thumbnails are requested from the server.

A thumbnail request method of a computer device including at least one processor, wherein the thumbnail request is performed by the at least one processor according to a user's input based on a length of a search bar for a live image and a live duration of the live image. calculating the minimum unit time of the movable live image; correcting, by the at least one processor, a viewpoint of the live image moved according to the user's input to any one of values determined by the calculated minimum unit of time and multiples of n; and requesting, by the at least one processor, a thumbnail corresponding to the corrected viewpoint.

According to one side, the step of calculating the minimum unit of time may be characterized by calculating the minimum unit of time of the live video using a ratio of the live duration to the length of the search bar.

According to another aspect, the minimum unit of time may be corrected to a value based on the unit of time in which the thumbnail is composed for the live video.

According to another aspect, the correcting step is performed at the time point of the live video moved according to the user's input among a set of a plurality of values resulting from the multiplication of the calculated minimum unit time and each of the multiples of n. It may be characterized by correcting the viewpoint of the live image moved according to the user's input to the nearest value.

According to another aspect, the value of the closest multiple may include the value of the closest multiplication result in a search direction for the live image.

According to another aspect, requesting a thumbnail corresponding to the corrected viewpoint includes requesting a thumbnail corresponding to the corrected viewpoint from a cache; and when the thumbnail does not exist in the cache, searching for the thumbnail from the cache within a time range determined based on n times the time of the minimum unit.

According to another aspect, the step of searching for a thumbnail from the cache within the time range includes a first point in time when the thumbnail does not exist and the minimum unit of time in a search direction for the live video from the first point in time. The thumbnail may be searched from the cache within a time range determined by a second time point moved by n times the time.

According to another aspect, requesting a thumbnail corresponding to the corrected viewpoint includes, if a thumbnail is not retrieved from the cache within the time range, requesting a thumbnail corresponding to the corrected viewpoint from a server. It may be characterized as further comprising:

According to another aspect, the thumbnail request method includes generating, by the at least one processor, a list of requests for thumbnails; and when processing of any request among the requests in the list is completed by the at least one processor, canceling the remaining requests included in the list.

According to another aspect, the step of generating the list includes storing a request for a random thumbnail in the list, and if a request for a thumbnail identical to the random thumbnail is stored in the list, the request for the random thumbnail It may be characterized by canceling.

A computer program recorded on a computer-readable recording medium is provided in combination with a computer device to execute the method on the computer device.

Provided is a computer-readable recording medium on which a computer program for executing the above method on a computer device is recorded.

At least one processor implemented to execute computer-readable instructions, wherein the user's input is based on the length of the search bar for the live image and the live duration of the live image by the at least one processor. Calculate the time of the minimum unit of the live image that can be moved according to the user's input, and set the timing of the live image moved according to the user's input to one of the values determined by the calculated time of the minimum unit and multiples of n. A computer device is provided that corrects the value and requests a thumbnail corresponding to the corrected point in time.

By adjusting the unit time for requesting a thumbnail of a live video being played based on the display density of the video player screen and the size of the video player's seeking bar, the number of times a thumbnail is requested from the server can be controlled.

Thumbnails received from the server are cached and utilized, but if a cache hit is not achieved, the number of times a thumbnail is requested from the server can be controlled by searching and providing the cached thumbnail within a time range determined based on the adjusted unit time. You can.

You can control the number of times a thumbnail is requested from the server by requesting and/or canceling the request in blocks.

By eliminating thumbnail requests for duplicate positions in the navigation bar, you can control the number of times thumbnails are requested from the server.

1 is a diagram illustrating an example of a network environment according to an embodiment of the present invention.
Figure 2 is a block diagram showing an example of a computer device according to an embodiment of the present invention.
Figure 3 is a diagram showing an example of a general view of a thumbnail request system in one embodiment of the present invention.
Figures 4 and 5 are diagrams illustrating examples of display density and size of the search bar according to an embodiment of the present invention.
Figure 6 is a flowchart showing an example of a thumbnail request method according to an embodiment of the present invention.
Figure 7 is a flowchart showing an example of a thumbnail request method using a cache according to an embodiment of the present invention.
Figure 8 is a diagram illustrating an example of searching for a thumbnail from a cache according to an embodiment of the present invention.
Figure 9 is a flowchart showing an example of a block-by-block thumbnail request process according to an embodiment of the present invention.
Figure 10 is a diagram illustrating an example of requesting a thumbnail using a list, according to an embodiment of the present invention.

Since the present invention can make various changes and have various embodiments, specific embodiments will be illustrated in the drawings and described in detail in the detailed description. However, this is not intended to limit the present invention to specific embodiments, and should be understood to include all changes, equivalents, and substitutes included in the spirit and technical scope of the present invention. While describing each drawing, similar reference numerals are used for similar components.

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 above terms are used only for the purpose of distinguishing one component from another. For example, a first component may be named a second component without departing from the scope of the present invention, and similarly, the second component may also be named a first component. The term and/or includes any of a plurality of related stated items or a combination of a plurality of related stated items.

When a component is said to be "connected" or "connected" to another component, it is understood that it may be directly connected to or connected to the other component, but that other components may exist in between. It should be. On the other hand, when it is mentioned that a component is “directly connected” or “directly connected” to another component, it should be understood that there are no other components in between.

The terms used in this application are only used to describe specific embodiments and are not intended to limit the invention. Singular expressions include plural expressions unless the context clearly dictates otherwise. In this application, terms such as “comprise” or “have” are intended to designate the presence of features, numbers, steps, operations, components, parts, or combinations thereof described in the specification, but are not intended to indicate the presence of one or more other features. It should be understood that this does not exclude in advance the possibility of the existence or addition of elements, numbers, steps, operations, components, parts, or combinations thereof.

Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as generally understood by a person of ordinary skill in the technical field to which the present invention pertains. Terms defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the related technology, and unless explicitly defined in the present application, should not be interpreted in an ideal or excessively formal sense. No.

Hereinafter, embodiments will be described in detail with reference to the accompanying drawings.

The thumbnail request system according to embodiments of the present invention may be implemented by at least one computer device, and the thumbnail request method according to embodiments of the present invention is performed through at least one computer device implementing the thumbnail request system. It can be. The computer program according to an embodiment of the present invention may be installed and driven in the computer device, and the computer device may perform the thumbnail request method according to the embodiment of the present invention under the control of the driven computer program. The above-described computer program may be combined with a computer device and stored in a computer-readable recording medium to execute the thumbnail request method on the computer device.

1 is a diagram illustrating an example of a network environment according to an embodiment of the present invention. The network environment in FIG. 1 shows an example including a plurality of electronic devices 110, 120, 130, and 140, a plurality of servers 150 and 160, and a network 170. Figure 1 is an example for explaining the invention, and the number of electronic devices or servers is not limited as in Figure 1. In addition, the network environment in FIG. 1 only explains one example of environments applicable to the present embodiments, and the environment applicable to the present embodiments is not limited to the network environment in FIG. 1.

The plurality of electronic devices 110, 120, 130, and 140 may be fixed terminals or mobile terminals implemented as computer devices. Examples of the plurality of electronic devices 110, 120, 130, and 140 include smart phones, mobile phones, navigation devices, computers, laptops, digital broadcasting terminals, PDAs (Personal Digital Assistants), and PMPs (Portable Multimedia Players). ), tablet PC, etc. For example, in FIG. 1, the shape of a smartphone is shown as an example of the electronic device 110. However, in embodiments of the present invention, the electronic device 110 actually communicates with other devices through the network 170 using a wireless or wired communication method. It may refer to one of various physical computer devices capable of communicating with electronic devices 120, 130, 140 and/or servers 150, 160.

The communication method is not limited, and may include not only a communication method utilizing a communication network that the network 170 may include (for example, a mobile communication network, wired Internet, wireless Internet, and a broadcast network), but also short-range wireless communication between devices. For example, the network 170 may include a personal area network (PAN), a local area network (LAN), a campus area network (CAN), a metropolitan area network (MAN), a wide area network (WAN), and a broadband network (BBN). , may include one or more arbitrary networks such as the Internet. Additionally, the network 170 may include any one or more of network topologies including a bus network, star network, ring network, mesh network, star-bus network, tree or hierarchical network, etc. Not limited.

Each of the servers 150 and 160 is a computer device or a plurality of computers that communicate with a plurality of electronic devices 110, 120, 130, 140 and a network 170 to provide commands, codes, files, content, services, etc. It can be implemented with devices. For example, the server 150 provides services (e.g., content provision service, archiving service, file distribution service, map service) to a plurality of electronic devices 110, 120, 130, and 140 connected through the network 170. , group call service (or voice conference service), messaging service, mail service, social network service, map service, translation service, financial service, payment service, search service, etc.).

Figure 2 is a block diagram showing an example of a computer device according to an embodiment of the present invention. Each of the plurality of electronic devices 110, 120, 130, and 140 described above or each of the servers 150 and 160 may be implemented by the computer device 200 shown in FIG. 2.

As shown in FIG. 2, this computer device 200 may include a memory 210, a processor 220, a communication interface 230, and an input/output interface 240. The memory 210 is a computer-readable recording medium and may include a non-permanent mass storage device such as random access memory (RAM), read only memory (ROM), and a disk drive. Here, non-perishable large-capacity recording devices such as ROM and disk drives may be included in the computer device 200 as a separate permanent storage device that is distinct from the memory 210. Additionally, an operating system and at least one program code may be stored in the memory 210. These software components may be loaded into the memory 210 from a computer-readable recording medium separate from the memory 210. Such separate computer-readable recording media may include computer-readable recording media such as floppy drives, disks, tapes, DVD/CD-ROM drives, and memory cards. In another embodiment, software components may be loaded into the memory 210 through the communication interface 230 rather than a computer-readable recording medium. For example, software components may be loaded into memory 210 of computer device 200 based on computer programs installed by files received over network 170.

The processor 220 may be configured to process instructions of a computer program by performing basic arithmetic, logic, and input/output operations. Commands may be provided to the processor 220 by the memory 210 or the communication interface 230. For example, processor 220 may be configured to execute received instructions according to program code stored in a recording device such as memory 210.

The communication interface 230 may provide a function for the computer device 200 to communicate with other devices (eg, the storage devices described above) through the network 170. For example, a request, command, data, file, etc. generated by the processor 220 of the computer device 200 according to a program code stored in a recording device such as memory 210 is transmitted to the network ( 170) and can be transmitted to other devices. Conversely, signals, commands, data, files, etc. from other devices may be received by the computer device 200 through the communication interface 230 of the computer device 200 via the network 170. Signals, commands, data, etc. received through the communication interface 230 may be transmitted to the processor 220 or memory 210, and files, etc. may be stored in a storage medium (as described above) that the computer device 200 may further include. It can be stored as a permanent storage device).

The input/output interface 240 may be a means for interfacing with the input/output device 250. For example, input devices may include devices such as a microphone, keyboard, or mouse, and output devices may include devices such as displays and speakers. As another example, the input/output interface 240 may be a means for interfacing with a device that integrates input and output functions, such as a touch screen. The input/output device 250 may be configured as a single device with the computer device 200.

Additionally, in other embodiments, computer device 200 may include fewer or more components than those of FIG. 2 . However, there is no need to clearly show most prior art components. For example, the computer device 200 may be implemented to include at least some of the input/output devices 250 described above, or may further include other components such as a transceiver, a database, etc.

Figure 3 is a diagram showing an example of a general view of a thumbnail request system in one embodiment of the present invention. Each of the user device 310 and the server 320 shown in FIG. 3 may be implemented by the computer device 200 previously described with reference to FIG. 2 .

The user device 310 communicates with the server 320 through a network (for example, the network 170 described with reference to FIGS. 1 and 2) to receive real-time streaming video (hereinafter referred to as “live video”) from the server 320. ') can be provided and played. For example, the user device 310 may receive files for playing live video from the server 320 under the control of a video player program installed and driven on the user device 310, and use the received files. You can play live video. For example, live video may be displayed through the video playback screen 311 shown in FIG. 3. FIG. 3 illustrates an embodiment in which the server 320 provides both a live video and a thumbnail for the live video to the user device 310. However, the server providing the live video and the server providing the thumbnail for the live video may be implemented by physically and/or geographically separated devices.

At this time, a search bar 312 for live video may appear on the video playback screen 311. In a live video, the right end of the navigation bar 312 may indicate the current viewpoint of the live video. In FIG. 3, the playback time indicator 313 indicates the position in the search bar 312 corresponding to the time at which the live video is currently being played. Accordingly, if the user does not separately specify the search position of the search bar 312, the playback time indicator 313 for the current live video may be located at the right end of the search bar 312.

If the user selects a part other than the right end using the navigation bar 312, an image from a past viewpoint corresponding to the selected part may be played. For example, in a touch screen environment, when the user touches a desired part of the navigation bar 312, the user device 200 may move the playback time indicator 313 to the touched position of the navigation bar 312. . At this time, when the user's touch is released, an image from a viewpoint corresponding to the position of the navigation bar 312 where the touch was released may be played. In a PC environment, touch and touch release may correspond to click and release.

On the other hand, in a touch screen environment, if the user drags the playback point indicator 313 moved to the location of the touch while maintaining the touch on the desired part of the search bar 312, search for the image can be performed. At this time, the user device 200 may request thumbnails corresponding to the position where the playback point indicator 313 is dragged from the server 320, and the thumbnails received from the server 320 may be sent to the point where the playback point indicator 313 is dragged. It can be displayed according to the location. In a PC environment, touch and drag may correspond to click and drag.

At this time, assuming that one thumbnail image is configured for each preset time unit (for example, 1 second) for the live video, the length of the navigation bar 312 and the live video playback screen 311 according to the display density Depending on the live duration of the video, the number of thumbnails corresponding to movement of the same distance of the playback point indicator 313 may vary. Here, the live duration may refer to the progress time after the playback of the corresponding live video begins. For example, the live duration of a live video played for 10 seconds may be 10 seconds, and if the live video is played for an additional 20 seconds, the live duration of the live video may be 30 seconds.

Figures 4 and 5 are diagrams illustrating examples of display density and size of the search bar according to an embodiment of the present invention. The embodiment of FIG. 4 shows an example in which the length of a portion 410 of the navigation bar representing 10 seconds of live video is expressed as 10 pixels (px), and the embodiment of FIG. 5 shows an example of 10 seconds of live video. This shows an example in which the length of a portion 510 of the search bar representing an image is expressed as 20 pixels. At this time, it is assumed that one thumbnail image is created every 2 seconds in both the embodiments of FIGS. 4 and 5. Additionally, it is assumed that the minimum unit that can recognize the movement (drag) of the user's touch is 2 pixels.

In the embodiment of Figure 4, upon recognizing that the user drags the playback point indicator from a position of 2 pixels to a position of 6 pixels, user device 310 displays a thumbnail at the 2-second position corresponding to 2 pixels and a thumbnail at the 2-second position corresponding to 4 pixels. Three thumbnails will be requested from the server 320: a thumbnail at the 4-second position and a thumbnail at the 6-second position corresponding to 6 pixels.

On the other hand, in the embodiment of FIG. 5, when the user recognizes that the playback point indicator is dragged from a position of 2 pixels to a position of 6 pixels, the user device 310, unlike the embodiment of FIG. 4, moves the indicator corresponding to 4 pixels. Only one thumbnail at the 2-second position will be requested from the server 320.

In other words, the number of thumbnails to be requested may vary when the user moves the playback time indicator by the same amount of pixels depending on the length of the navigation bar depending on the display density and the live duration of the live video. For example, let's assume that the live video is played for 1 hour, so the live duration is 1 hour (360000 milliseconds), and the length of the navigation bar for 1 hour of video is 1000 pixels. Also, the movement of the user's touch can be recognized for each pixel (the minimum unit of movement of the playback point according to user input is 1 pixel), and in this case, it is assumed that thumbnails for the live video are generated in units of 1 second on the screen. A movement of 1 pixel of the playback point indicator may correspond to a movement of the search time of 1 second (3600000 (milliseconds) / 1000 (pixels) = 3600 (milliseconds) = 1 (seconds) for the live video. In this case, one thumbnail may be requested from the server 320 every time the user drags the playback point indicator by 1 pixel. If the user moves the playback point indicator 100 pixels, 100 thumbnails may be generated in a short period of time. At this time, if the minimum time unit for requesting a thumbnail is changed to 5 seconds, 20 thumbnails are sent to the server 320 instead of 100 even if the user moves the playback time indicator by 100 pixels. In other words, the number of thumbnail requests can be adjusted by increasing the minimum time unit for requesting the thumbnail.

Figure 6 is a flowchart showing an example of a thumbnail request method according to an embodiment of the present invention. The thumbnail request method according to this embodiment may be performed by the computer device 200 implementing the user device 310 described with reference to FIG. 3 . At this time, the processor 220 of the computer device 200 may be implemented to execute control instructions according to the code of an operating system included in the memory 210 or the code of at least one computer program. Here, the processor 220 causes the computer device 200 to perform steps 610 to 630 included in the method of FIG. 6 according to control instructions provided by code stored in the computer device 200. can be controlled.

In step 610, the computer device 200 may calculate the minimum unit of time of the live image that can be moved according to the user's input based on the length of the search bar for the live image and the live duration of the live image. For example, the computer device 200 may calculate the minimum unit of time of a live video using the ratio of the live duration to the length of the search bar. Previously, it was explained that when the live duration is 1 hour and the length of the navigation bar is 1000 pixels, the minimum unit of time for the live video that can be moved according to the user's input is calculated as 1 second. Meanwhile, the computer device 200 may use the minimum unit of time by correcting it to a value based on the unit of time for constructing a thumbnail for the live image. For example, when the thumbnails of the live video are configured in units of 1 second and the ratio of the live duration to the length of the search bar is 1.75 seconds, the computer device 200 sets the minimum unit of time to 2 seconds (for example, the first decimal point) Rounding to the nearest digit) can be corrected so that the minimum unit of time is a multiple of the unit of time in which the thumbnails of the live video are composed.

In step 620, the computer device 200 may correct the viewpoint of the live image moved according to the user's input to any one of the values determined by the calculated minimum unit of time and multiples of n. . For example, the computer device 200 selects the value closest to the viewpoint of the live image moved according to the user's input among a set of a plurality of values resulting from the multiplication of the calculated minimum unit of time and each of the multiples of n. The viewpoint of the live video moved according to the user's input can be corrected. If thumbnails are configured in 1-second increments and the movement occurs from 1 to 9 seconds according to the user's input, a total of 9 thumbnail requests are made for each second. On the other hand, in this embodiment, when the minimum unit of time is 1 second and n is 3, the computer device 200 operates on 3 seconds (1*3), 6 seconds (1*6), 9 seconds (1*9), Correction values such as ?? can be calculated. At this time, the viewpoint of the live image moved according to the user's input may be corrected to the closest correction value among these correction values. In particular, the value of the closest multiple may include the value of the closest multiplication result in the search direction for the live image. In the above example, the movement from 1 second to 9 seconds may be a search direction from the past to the present. In this case, the computer device 2900 sets the time points of 1 second, 2 seconds, and 3 seconds of the live video as a correction value of 3 seconds (1*3), and the time points of 4 seconds, 5 seconds, and 6 seconds as a correction value of 6 seconds (2*3). ), 7 seconds, 8 seconds, and 9 seconds can each be corrected with a correction value of 9 seconds (3*3). In this case, the timing of the live video moved according to the user's input is corrected to 3 seconds, 6 seconds, and 9 seconds, and therefore a total of three thumbnail requests are made. In this case, the computer device 200 can adjust the number of thumbnail requests by adjusting the value of n.

In step 630, the computer device 200 may request a thumbnail corresponding to the corrected viewpoint. For example, the computer device 200 corresponds to the corrected time point (corrected times of 3 seconds, 6 seconds, and 9 seconds in the example above) with a server (e.g., server 320 of FIG. 3) that provides the thumbnail. You can request a thumbnail.

Meanwhile, the computer device 200 may utilize a cache for thumbnails depending on the embodiment.

Figure 7 is a flowchart showing an example of a thumbnail request method using a cache according to an embodiment of the present invention. Steps 710 to 740 according to the embodiment of FIG. 7 may be performed by being included in step 630 previously described with reference to FIG. 6 .

In step 710, the computer device 200 may request a thumbnail corresponding to the point in time corrected by the cache. Here, the corrected time point may correspond to the time point corrected previously in step 620 of FIG. 6. In other words, the computer device 200 may first request a thumbnail corresponding to that point in time from the cache before requesting a thumbnail from the server. At this time, the cache may include, for example, a Least Recently Used (LRU) cache, but is not limited thereto.

At step 720, the computer device 200 may determine whether the requested thumbnail exists in the cache. At this time, step 740 may be performed if the requested thumbnail does not exist in the cache, and step 760 may be performed if it does exist.

In step 730, the computer device 200 may retrieve a thumbnail from the cache within a time range determined based on n times the minimum unit of time. For example, the computer device 200 may provide a first viewpoint for which no thumbnail for that viewpoint exists in the cache, and a second viewpoint moved by a time n times the minimum unit of time in the search direction for the live image from the first viewpoint. Thumbnails can be retrieved from the cache within a time range determined by the viewpoint.

At step 740, computer device 200 may determine whether a thumbnail is retrieved from the cache. At this time, step 750 may be performed if the thumbnail is not retrieved from the cache, and step 760 may be performed if the thumbnail is retrieved.

In step 750, the computer device 200 may request a thumbnail corresponding to the corrected time point from the server. In other words, if the thumbnail cannot be obtained from the cache even though the point in time for obtaining the thumbnail is extended to a specific time range, the computer device 200 can obtain the thumbnail for that point in time through the server. Thumbnails obtained from the server may be stored in a cache relative to that point in time.

In step 760, the computer device 200 may display the thumbnail delivered from the cache on the playback screen of the live video in association with the corrected viewpoint. In other words, if a thumbnail can be obtained from the cache, the thumbnail delivered from the cache can be displayed on the playback screen of the live video. Afterwards, the thumbnail request method according to this embodiment may be terminated for one viewpoint of the live video moved according to the user's input.

Figure 8 is a diagram illustrating an example of searching for a thumbnail from a cache according to an embodiment of the present invention. Figure 8 shows a portion 810 of the search bar. In this embodiment, it is assumed that the minimum unit of time is 1 second and n is 5. At this time, if a thumbnail corresponding to 62 seconds of the live video is requested according to the user's input, 62 seconds may be corrected to 65 seconds in the embodiment of FIG. 6, and a thumbnail corresponding to 65 seconds may be requested as a cache. . If a thumbnail corresponding to 65 seconds does not exist in the cache, the computer device 200 may search for a thumbnail from the cache within a time range determined based on n times the time of the minimum unit. In addition, in this embodiment, the computer device 200 determines the minimum unit of time in the search direction for the live image from the first time point (65 seconds) and the first time point (65 seconds) for which there is no thumbnail for the corresponding time point in the cache. Thumbnails can be retrieved from the cache within a time range determined by the second time point (70 seconds) moved by n (n=5) times the time (in other words, a time range from 65 to 70 seconds). You can.

If the corrected viewpoint is not used according to the embodiment, the viewpoint is moved by n (n=5) times the minimum unit time in the search direction for the live video based on the first recognized 62 seconds (67 seconds). Thumbnails can be retrieved from the cache within a time range determined by (in other words, a time range from 62 to 67 seconds).

Figure 9 is a flowchart showing an example of a block-by-block thumbnail request process according to an embodiment of the present invention. Steps 910 and 920 according to the embodiment of FIG. 9 may be performed after step 630 previously described with reference to FIG. 6 .

At step 910, computer device 200 may generate a list of requests for thumbnails. Multiple requests for thumbnails may occur, and computer device 200 may generate a list of these multiple requests. Depending on the embodiment, the computer device 200 stores a request for a random thumbnail in the list in step 910, but if a request for a thumbnail identical to the random thumbnail is stored in the list, the computer device 200 cancels the request for the random thumbnail. , requests for duplicate thumbnails can be removed. For example, when the search process repeatedly moves forward and backward based on a specific playback point, requests for thumbnails for duplicate playback points may occur. Accordingly, the computer device 200 can reduce the number of thumbnail requests by removing such duplicate thumbnail requests.

In step 920, when processing for any request among the requests in the list is completed, the computer device 200 may cancel the remaining requests included in the list.

For example, when requests for thumbnails occur for 100 viewpoints, thumbnails for all viewpoints are updated each time a completion event for a request for a thumbnail is received because the thumbnails are loaded in an asynchronous manner. In this case, the thumbnail image continues to change even if the user's navigation stops. Additionally, you can cancel the previous request and create a new request, but in this case, if new requests continue to occur before the thumbnail request for one viewpoint is completed, the image will not be updated because all previous requests will be canceled. . Therefore, in this embodiment, the number of requests can be reduced by storing thumbnail requests in a list and canceling all remaining requests in the list when processing for one of the requests in the list is completed. In addition, when a response to a thumbnail request for a specific point is received during the search, the image is updated, so the thumbnail can be updated in the middle even if the user continues the search.

Figure 10 is a diagram illustrating an example of requesting a thumbnail using a list, according to an embodiment of the present invention. It is assumed that the playback point moves from the first point of view (1010) to the second point of view (1020) according to the user input. At this time, thumbnail requests that occur every n seconds may be delivered to the cache and/or server. Additionally, requests may be stored sequentially in request list 1 (1030). At this time, when the playback point is located at the third point in time (1040), it is assumed that the processing of the request for the thumbnail delivered at the fourth point in time (1050) has been completed. In this case, the thumbnail delivered in accordance with the thumbnail request delivered at the fourth time point 1050 may be displayed on the playback screen of the live video, and all remaining requests in request list 1 1030 may be canceled. Additionally, from the third time point 1040, requests after the third time point 1040 may be stored through request list 2 (1060). Requests included in request list 2 (1060) may also be canceled when processing of one request is completed, excluding that request.

As such, according to embodiments of the present invention, by adjusting the unit time for requesting a thumbnail of a live video being played based on the display density of the video player screen and the size of the video player's seeking bar, the server Provides a thumbnail request method and system that can control the number of times a thumbnail is requested. In addition, the thumbnails received from the server are cached and utilized, but if a cache hit is not achieved, the number of times a thumbnail is requested from the server is reduced by searching and providing the cached thumbnails within a time range determined based on the adjusted unit time. Provides a controllable thumbnail request method and system. Additionally, it provides a thumbnail request method and system that can control the number of times thumbnails are requested from the server by requesting and/or canceling requests for thumbnails in blocks. Additionally, by removing thumbnail requests for duplicate positions in the navigation bar, the number of times thumbnails are requested from the server can be controlled.

The system or device described above may be implemented with hardware components or a combination of hardware components and software components. For example, devices and components described in embodiments may include, for example, a processor, a controller, an arithmetic logic unit (ALU), a digital signal processor, a microcomputer, a field programmable gate array (FPGA), etc. , may be implemented using one or more general-purpose or special-purpose computers, such as a programmable logic unit (PLU), a microprocessor, or any other device capable of executing and responding to instructions. A processing device may execute an operating system (OS) and one or more software applications that run on the operating system. Additionally, a processing device may access, store, manipulate, process, and generate data in response to the execution of software. For ease of understanding, a single processing device may be described as being used; however, those skilled in the art will understand that a processing device includes multiple processing elements and/or multiple types of processing elements. It can be seen that it may include. For example, a processing device may include a plurality of processors or one processor and one controller. Additionally, other processing configurations, such as parallel processors, are possible.

Software may include a computer program, code, instructions, or a combination of one or more of these, which may configure a processing unit to operate as desired, or may be processed independently or collectively. You can command the device. Software and/or data may be used on any type of machine, component, physical device, virtual equipment, computer storage medium or device to be interpreted by or to provide instructions or data to a processing device. It can be embodied in . Software may be distributed over networked computer systems and stored or executed in a distributed manner. Software and data may be stored on one or more computer-readable recording media.

The method according to the embodiment may be implemented in the form of program instructions that can be executed through various computer means and recorded on a computer-readable medium. The computer-readable medium may include program instructions, data files, data structures, etc., singly or in combination. The medium may continuously store a computer-executable program, or may temporarily store it for execution or download. In addition, the medium may be a variety of recording or storage means in the form of a single or several pieces of hardware combined. It is not limited to a medium directly connected to a computer system and may be distributed over a network. Examples of media include magnetic media such as hard disks, floppy disks, and magnetic tapes, optical recording media such as CD-ROMs and DVDs, magneto-optical media such as floptical disks, And there may be something configured to store program instructions, including ROM, RAM, flash memory, etc. Additionally, examples of other media include recording or storage media managed by app stores that distribute applications, sites or servers that supply or distribute various other software, etc. Examples of program instructions include machine language code, such as that produced by a compiler, as well as high-level language code that can be executed by a computer using an interpreter, etc.

As described above, although the embodiments have been described with limited examples and drawings, various modifications and variations can be made by those skilled in the art from the above description. For example, the described techniques are performed in a different order than the described method, and/or components of the described system, structure, device, circuit, etc. are combined or combined in a different form than the described method, or other components are used. Alternatively, appropriate results may be achieved even if substituted or substituted by an equivalent.

Therefore, other implementations, other embodiments and equivalents of the claims also fall within the scope of the following claims.

Claims (17)

In a method for requesting a thumbnail of a computer device including at least one processor,
calculating, by the at least one processor, a minimum unit of time for a live image that can be moved according to a user's input based on a length of a search bar for the live image and a live duration of the live image;
correcting, by the at least one processor, a viewpoint of the live image moved according to the user's input to any one of values determined by the calculated minimum unit of time and multiples of n; and
Requesting, by the at least one processor, a thumbnail corresponding to the corrected viewpoint
How to request a thumbnail containing . According to paragraph 1,
The step of calculating the minimum unit of time is,
A thumbnail request method characterized by calculating the minimum unit time of the live video using a ratio of the live duration to the length of the search bar. According to paragraph 1,
A thumbnail request method, characterized in that the minimum unit of time is corrected to a value based on the unit of time for which the thumbnail is composed for the live video. According to paragraph 1,
The correction step is,
Among the set of a plurality of values resulting from the multiplication of the time of the calculated minimum unit and each of the multiples of n, the value closest to the viewpoint of the live video moved according to the user's input is the value moved according to the user's input. A thumbnail request method characterized by correcting the viewpoint of a live video. According to clause 4,
A thumbnail request method, wherein the value of the closest multiple includes the value of the closest multiplication result in a search direction for the live video. According to paragraph 1,
The step of requesting a thumbnail corresponding to the corrected viewpoint is,
requesting a thumbnail corresponding to the corrected viewpoint from a cache; and
If the thumbnail does not exist in the cache, searching for a thumbnail from the cache within a time range determined based on n times the time of the minimum unit.
A thumbnail request method comprising: According to clause 6,
Retrieving a thumbnail from the cache within the time range includes:
The cache within a time range determined by a first time point at which the thumbnail does not exist and a second time point moved by a time n times the time of the minimum unit in the search direction for the live video from the first time point. A thumbnail request method characterized by retrieving a thumbnail from. According to clause 6,
The step of requesting a thumbnail corresponding to the corrected viewpoint is,
If a thumbnail is not retrieved from the cache within the time range, requesting a thumbnail corresponding to the corrected time point from the server.
A thumbnail request method further comprising: According to paragraph 1,
generating, by the at least one processor, a list of requests for thumbnails; and
When processing of any request among the requests in the list is completed by the at least one processor, canceling the remaining requests included in the list.
A thumbnail request method that further includes . According to clause 9,
The step of creating the list is,
A thumbnail request method comprising storing a request for a random thumbnail in the list, and canceling the request for the random thumbnail if a request for a thumbnail identical to the random thumbnail is stored in the list. A computer program recorded on a computer-readable recording medium to execute the method of any one of claims 1 to 10 on a computer device. A computer-readable recording medium recording a computer program for executing the method of any one of claims 1 to 10 on a computer device. At least one processor implemented to execute computer readable instructions
Including,
By the at least one processor,
Calculate the minimum unit of time of the live video that can be moved according to the user's input based on the length of the navigation bar for the live video and the live duration of the live video,
Correcting the viewpoint of the live image moved according to the user's input to one of the values determined by the calculated minimum unit time and multiples of n,
Requesting a thumbnail corresponding to the corrected point in time
A computer device characterized by a. According to clause 13,
By the at least one processor,
Calculating the minimum unit time of the live video using the ratio of the live duration to the length of the search bar
A computer device characterized by a. According to clause 13,
By the at least one processor,
Among the set of a plurality of values resulting from the multiplication of the time of the calculated minimum unit and each of the multiples of n, the value closest to the viewpoint of the live video moved according to the user's input is the value moved according to the user's input. Correcting the viewpoint of live video
A computer device characterized by a. According to clause 13,
By the at least one processor,
Request a thumbnail corresponding to the corrected point in time from the cache,
If the thumbnail does not exist in the cache, searching for a thumbnail from the cache within a time range determined based on n times the time of the minimum unit.
A computer device characterized by a. According to clause 13,
By the at least one processor,
Create a list of requests for thumbnails,
When processing of any request among the requests in the list is completed, canceling the remaining requests included in the list.
A computer device characterized by a.

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