KR20170081361A - Video processing method, sep-top box and video processing system - Google Patents

Abstract

The image processing method includes receiving a content image from a media server, receiving an image corresponding to each frame of the image captured through the user terminal from an image providing server, displaying the received image on a web view browser And overlaying the WebView browser on the player on which the content image is to be played.

Description

TECHNICAL FIELD [0001] The present invention relates to an image processing method, a set-top box, and an image processing system,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image processing method, a set-top box, and an image processing system which are performed in a set-top box.

In order to interpret the digital image meaningfully, it is called image classification to classify by object or to divide into the area of interest. In the image classification method, a Mixture of Gaussian model is generated in pixel units by frame comparison, and a method of separating the background by the depth value of the object by using a method of separating the background, a Bayesian decision model, a kernel density model and an infrared camera Method is being used.

On the other hand, there is an attempt to synthesize a broadcast image and an arbitrary image and transmit them through a set-top box. For this purpose, there is a method of transmitting a synthesized image to a set-top box after synthesizing a broadcasting image and a synthesizing target image in a broadcasting platform. However, a high-performance broadcasting platform is required because a real- There is a problem that a delay occurs by the time required.

In addition, although it is possible to consider a method of real-time synthesis of a broadcast image and a target image to be synthesized in a set-top box, there is a problem in that it is impossible to synthesize the performance of a commercially available set-top box.

In this regard, Korean Patent Laid-Open Publication No. 2004-0022493 relates to a system and method for a graphical user interface for a video output apparatus using a laser, which comprises combining an image according to an A / V signal and graphic interface information, To the video output unit.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide an image processing apparatus and method for displaying a content image received from a media server and an image received from an image providing server on a web view browser, Method, a set top box, and a system. It is to be understood, however, that the technical scope of the present invention is not limited to the above-described technical problems, and other technical problems may exist.

According to an aspect of the present invention, there is provided an image processing method performed in a set-top box, the method comprising: receiving a content image from a media server; Displaying the received image on a web view browser, and overlaying the web view browser on a player on which the content image is to be played, Can be provided.

According to another aspect of the present invention, there is provided a content providing apparatus including a content receiving unit for receiving a content image from a media server, an image receiving unit for receiving an image corresponding to each frame of the captured image through the user terminal, a web view browser, and an image output unit for overlaying the web view browser on a player on which the content image is to be played.

According to still another embodiment of the present invention, there is provided an image providing server and a set-top box, wherein the image providing server receives a first image and an alpha value corresponding to each frame of an image photographed through the user terminal from a user terminal And generate a second image based on the first image and alpha value and to transmit the second image to the set top box, the set top box receiving a content image from a media server, And displays the second image received from the web viewer on a web view browser, and overlayes the web viewer on the player on which the content image is reproduced.

The above-described task solution is merely exemplary and should not be construed as limiting the present invention. In addition to the exemplary embodiments described above, there may be additional embodiments described in the drawings and the detailed description of the invention.

According to any one of the above-mentioned objects of the present invention, the content video received from the media server and the image received from the image providing server are displayed on a web view browser, and the web viewer is connected to the player A set-top box, and a system.

Further, according to any one of the tasks of the present invention, a variety of image mixing services can be provided by providing an image photographed through a user terminal through a set-top box in real time.

In addition, there is no need to build a high-end broadcasting platform in order to transmit the synthesized image to the set-top box after synthesizing the broadcast image and the synthesized object image.

Also, by displaying the content image and the image on a web view browser and overlaying the Web view browser on the player on which the content image is reproduced, the image synthesized in real time can be provided through the currently commercialized low-price set-top box.

1 is a configuration diagram of an image processing system according to an embodiment of the present invention.
2 is a block diagram of a set-top box according to an embodiment of the present invention.
3 is a diagram illustrating alpha values of respective images corresponding to respective frames of an image extracted through a user terminal according to an exemplary embodiment of the present invention.
4 is a diagram illustrating overlaying a WebView browser to a player according to an embodiment of the present invention.
5 is a flowchart illustrating an image processing method according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, which will be readily apparent to those skilled in the art. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and similar parts are denoted by like reference characters throughout the specification.

Throughout the specification, when a part is referred to as being "connected" to another part, it includes not only "directly connected" but also "electrically connected" with another part in between . Also, when an element is referred to as "including" an element, it is to be understood that the element may include other elements as well as other elements, And does not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof.

In this specification, the term " part " includes a unit realized by hardware, a unit realized by software, and a unit realized by using both. Further, one unit may be implemented using two or more hardware, or two or more units may be implemented by one hardware.

In this specification, some of the operations or functions described as being performed by the terminal or the device may be performed in the server connected to the terminal or the device instead. Similarly, some of the operations or functions described as being performed by the server may also be performed on a terminal or device connected to the server.

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

1 is a configuration diagram of an image processing system according to an embodiment of the present invention. Referring to FIG. 1, the image processing system 1 may include a user terminal 100, an image providing server 110, and a set-top box 120.

However, since the image processing system of FIG. 1 is only an embodiment of the present invention, the present invention is not limited to FIG. For example, the image processing system 1 may include only the image providing server 110 and the set-top box 120.

The user terminal 100 can photograph an image through a camera provided in the user terminal 100. [ The user terminal 100 may transmit a first image corresponding to each frame of the photographed image to the image providing server 110. [

For example, the user terminal 100 may extract the alpha value (Alpha) of the first image corresponding to each frame of the photographed image. The user terminal 100 may separate the object and the background of the first image based on the alpha value. The user terminal 100 may transmit the first image and the alpha value corresponding to each frame to the image providing server 110. [ For example, the user terminal 100 may transmit a first image and an alpha value in a predetermined frame per second (FPS).

The image providing server 110 may receive the first image and the alpha value corresponding to each frame from the user terminal 100. [ The image providing server 110 may generate the second image based on the first image and the alpha value corresponding to each frame.

For example, the second image may be in PNG (Portable Network Graphics) format. Further, the second image may be an image in which the background image is adjusted transparently.

The image providing server 110 may store the second image by matching with the reception time of the first image from the user terminal 100. [ For example, the second image may include the reception time information from the user terminal 100 of the image providing server 110.

The image providing server 110 may transmit the generated second image to the set top box 120. [

The set-top box 120 may receive a content image from a media server (not shown). For example, the content may include all IPTV services such as a real-time channel, video on demand (VOD), and the like.

The set-top box 120 may receive the second image from the image providing server 110. For example, the set-top box 120 may request the image providing server 110 to send a second image corresponding to the image request time.

In this case, if the request period of the set-top box 120 is higher than the download speed of the second image, the second image may not exist, and thus a delay may occur until the next frame is passed. In addition, if the request period of the set-top box 120 is slower than the download speed of the second image, the playback speed may be slower than the real-time image speed.

In order to solve this problem, the set-top box 120 may measure the initial latency in receiving the second image, and may calculate the image request time by reflecting the initial latency at the current time of requesting the image .

For example, the set-top box 120 may request the image providing server 110 to provide a second image corresponding to " current time + initial latency time ".

With the above-described method, even if the request period of the second image of the set-top box 120 is different from the download speed, the current image and the playback speed can be adjusted.

The set top box 120 may display the received second image on a web view browser and overlay the web view browser on the player on which the content image is played.

The set-top box 120 may control the transparency of the WebView browser such that the second image is projected onto the content image. For example, the set-top box 120 can transparently control the WebView browser.

By transparently controlling the WebView browser, only the second image displayed in the WebView browser can be projected onto the player.

When the WebView browser is overlaid on the player on which the content image is reproduced and the second image is refreshed in a predetermined period, it is possible to obtain an effect that the two images are mixed naturally without directly synthesizing the images.

In addition, by using the second image having a transparent background, it is possible to obtain the same effect that only the object whose background has been removed is synthesized on the content image.

The set top box 120 may receive user input to control the second image. For example, a remote controller (not shown) connected to the set-top box 120 may include a first function key to control the second image. The first function key may include a direction key for controlling the output position of the second image and an up / down key for controlling the size of the second image.

For example, when a user takes a picture of himself / herself through the user terminal 100 and tries to mix it with the content image, the user controls the position or size of his / her own image projected on the content image through the first function key can do.

The set-top box 120 may control the displayed position of the second image or the size of the second image based on user input. For example, the set-top box 120 may control the location displayed in the WebView browser of the second image.

The set-top box 120 may receive a user input requesting transmission of a second image. For example, the remote controller (not shown) connected to the set-top box 120 may include a second function key and a second function key to capture a screen of the user, 3 function keys. The second function key may be a function key that captures only the image of the user who is projected on the content image, and the third function key may be a function key that captures a screen where the content image and the user's own appearance are mixed.

For example, the user captures a screen in which his / her own image or content image projected on the content image is mixed with the user's own image through the second function key and the third function key, And can utilize it.

It is also possible to compare precisely the posture of a professional athlete appearing on a sports channel with my posture.

The set top box 120 may request the image providing server 110 to transmit the second image corresponding to the reception time of the second function key or the third function key input.

The image providing server 110 receives a second image request including the image request time from the set-top box 120 and transmits the second image corresponding to the image request time to the set-top box 120 or the user terminal 100).

For example, when the image providing server 110 receives a transmission request of the second image corresponding to the reception time of the user input from the set-top box 120, And transmit the retrieved second image to the set-top box 120 or the user terminal 100. [

In addition, when receiving the user input through the third function key, the set-top box 120 may transmit a frame corresponding to the reception time of the user input among the frames of the content image to the image providing server 110. [

When the set-top box 120 receives a user input through the third function key, the image providing server 110 receives a frame corresponding to the reception time of the user input from the set-top box 120 can do. In this case, the received frame and the reception time information may be combined with the second image corresponding to the reception time of the user input to generate the third image. The third image may be a captured image in which the content image and the user's own image are mixed.

The image providing server 110 may transmit the synthesized third image to the set-top box 120 or the user terminal 100. [

One example of the user terminal 100 is a wireless communication device that is guaranteed to be portable and mobility and includes a PCS (Personal Communication System), a GSM (Global System for Mobile communications), a PDC (Personal Digital Cellular), a PHS (Personal Digital Assistant), IMT (International Mobile Telecommunication) -2000, CDMA (Code Division Multiple Access) -2000, W-CDMA (W-CDMA), Wibro (Wireless Broadband Internet) , A smart pad, a tablet PC, and the like.

One example of such a network 120 includes the Internet, a wireless local area network (WLAN), a wireless LAN, and the like. , WAN (Wide Area Network), PAN (Personal Area Network), 3G, Long Term Evolution (LTE), 5G, Wireless Fidelity (WiFi), World Interoperability for Microwave Access (WiMAX) But is not limited thereto.

2 is a block diagram of a set-top box according to an embodiment of the present invention. 2, the set-top box 120 may include a content receiving unit 200, an image receiving unit 210, an image output unit 220, a user input receiving unit 230, and an image providing unit 240. However, since the block diagram of the set-top box 120 of FIG. 2 is only an embodiment of the present invention, the present invention is not limited to FIG.

The content receiving unit 200 can receive a content image from a media server (not shown). For example, the content may include all IPTV services such as a real-time channel, video on demand (VOD), and the like.

The image receiving unit 210 may receive an image (second image) from the image providing server 110. For example, the image receiving unit 210 may request the image providing server 110 to provide an image corresponding to the image request time. The image may be transmitted from the image providing server 110 in a predetermined frame per second (FPS).

The image may be, for example, the object and the background are separated by the image providing server 110 based on the Alpha map received from the user terminal 100, and the background is processed transparently.

In addition, the image may be stored matching the reception time of the first image from the user terminal 100 of the image providing server 110. For example, the image may include the reception time information of the first image from the user terminal 100 of the image providing server 110.

At this time, if the request period of the image receiving unit 210 is faster than the download speed of the image, there may be no corresponding image, so a delay may occur until the next frame is passed. In addition, when the request period of the image receiving unit 210 is slower than the download speed of the image, the playback speed may be slower than the real time image speed.

In order to solve this problem, the image receiving unit 210 may measure the initial latency in receiving the image, and may calculate the image request time by reflecting the initial latency at the current time of requesting the image.

For example, the image receiving unit 210 may request the image providing server 110 to provide an image corresponding to " current time + initial latency time ".

Through the above-described method, even if the request period of the image of the image receiving unit 210 is different from the download speed, the current image and the playback speed can be adjusted.

The image output unit 220 may display the received image on a web view browser and overlay the web view browser on the player on which the content image is to be played.

The image output unit 220 may control the transparency of the WebView browser so that the image is projected on the content image. For example, the image output unit 220 can transparently control the WebView browser.

By transparently controlling the WebView browser, only images displayed in the WebView browser can be projected onto the player.

When the WebView browser is overlaid on the player on which the content image is reproduced and the image is refreshed periodically, an effect that the two images are mixed naturally can be obtained without directly synthesizing the images.

In addition, by using an image having a transparent background, it is possible to obtain an effect similar to the effect that only an object whose background has been removed is synthesized on a content image.

The user input receiving unit 230 may receive a user input for controlling the image from a remote controller (not shown). For example, the remote controller (not shown) may include a first function key for controlling the second image. The first function key may include a direction key for controlling the output position of the second image and an up / down key for controlling the size of the second image.

For example, when a user takes a picture of himself / herself through the user terminal 100 and tries to mix it with the content image, the user controls the position or size of his / her own image projected on the content image through the first function key can do.

The user input receiving unit 230 can control the displayed position of the image or the size of the image based on the user input.

In this case, the image output unit 220 can control the displayed position of the image or the size of the image based on the user input. For example, the image output unit 220 may control the position displayed on the WebView browser of the image.

The user input receiving unit 230 may receive a user input requesting transmission of an image. For example, the remote controller (not shown) may include a second function key and a third function key for allowing a user to capture a screen of the user's own projected image or a mixed image of the content image and the user's own image . The second function key may be a function key that captures only the image of the user who is projected on the content image, and the third function key may be a function key that captures a screen where the content image and the user's own appearance are mixed.

For example, the user captures a screen in which his / her own image or content image projected on the content image is mixed with the user's own image through the second function key and the third function key, And can utilize it.

It is also possible to compare precisely the posture of a professional athlete appearing on a sports channel with my posture.

The image providing unit 240 may request the image providing server 110 to transmit the image corresponding to the reception time of the second function key or the third function key input.

Also, when receiving the user input through the third function key, the image providing unit 240 may transmit a frame corresponding to the reception time of the user input among the frames of the content image to the image providing server 110. [ The image providing unit 240 may request the image providing server 110 to transmit the composite image of the image corresponding to the reception time of the third function key and the frame of the content image corresponding to the reception time of the third function key.

The image providing unit 240 may receive and store an image or a composite image corresponding to the reception time of the second function key or the third function key. Here, the image may be an image corresponding to the image of the user himself / herself projected on the content image, and the composite image may be a captured image of a screen in which the content image and the user's own image are mixed.

The image or composite image may be transmitted to the user terminal 100. Alternatively, the image or composite image may be output via the set top box 120 according to user input.

3 is a diagram illustrating alpha values of respective images corresponding to respective frames of an image extracted through a user terminal according to an exemplary embodiment of the present invention.

Referring to FIG. 3, the user terminal 100 may photograph an image through a camera provided in the user terminal 100. The user terminal 100 may transmit an image corresponding to each frame of the photographed image to the image providing server 110. [

For example, the user terminal 100 may extract an alpha value (Alpha) 310 of the image 300 corresponding to one frame. For example, the alpha value 310 may be an alpha map.

The user terminal 100 may separate the background of the image 300 from the background by extracting the alpha value 310.

The user terminal 100 may transmit the alpha value 310 and the original image 320 to the image providing server 110.

4 is a diagram illustrating overlaying a WebView browser to a player according to an embodiment of the present invention.

According to an embodiment of the present invention, an image photographed through the user terminal 100 may be output together with the content image. For example, a user can compare his / her posture with a posture of a professional athlete by shooting his / her own image in accordance with the posture of a professional athlete appearing on a sports channel and outputting the user's own appearance together with the sports channel.

In addition, the user can output his or her own appearance to a favorite animation channel or a drama channel.

Hereinafter, an embodiment of outputting a user's own appearance to a sports channel will be described with reference to FIG.

The image providing server 110 may generate a new image 400 (second image) based on the alpha value 310 and the original image 320 received from the user terminal 100. The generated image 400 may be in PNG (Portable Network Graphics) format.

For example, the image providing server 110 may adjust the background image 410 to be transparent and maintain the transparency of the object 420 based on the alpha value 310 and the original image 320.

The set top box 120 receives the image 400 generated from the image providing server 110 and displays the received image 400 on the web view browser 430 and displays the web view browser 430 on the content It can be overlaid on the player in which the video is reproduced.

The set-top box 120 may control the transparency of the WebView browser 430 so that the image 400 is projected on the content image. For example, the set-top box 120 may control the WebView browser 430 in a transparent manner.

Only the image 400 displayed on the WebView browser 430 can be projected onto the player by transparently controlling the WebView browser 430. [ In addition, by using the image 400 having a transparent background, it is possible to obtain the same effect that only the object 420 from which the background has been removed is synthesized on the content image.

The web viewer 430 is overlaid on the player on which the content image is reproduced and the image 400 is refreshed at a predetermined period so that only the image 450 of the object 400, Lt; / RTI >

In addition, according to an embodiment of the present invention, the user controls the output position and size of the image 450 of the object mixed in the content image using the first function key provided from the remote controller connected to the set-top box 120 .

The output position and size of the image 450 of the object to be mixed with the content image may vary depending on the photographing distance and angle of the user terminal 100. [ For example, the user can adjust the size of his / her own object image 450 mixed with the sports channel to be equal to the size of the pro athlete appearing on the sports channel using the first function key. In addition, the user may adjust the position of his / her object image 450 so as to easily follow the posture of the professional athlete.

 In addition, according to an embodiment of the present invention, only the image 450 of the object projected on the content image can be captured using the second function key provided from the remote controller connected to the set-top box 120. Also, it is possible to capture a screen in which the content image and the object image 450 are mixed using the third function key provided from the remote controller connected to the set-top box 120. [

For example, the user may capture his / her own object image 450 projected on the sports channel through the second function key and the third function key, or capture a screen in which the sports channel and the object image 450 are mixed, The user can acquire his or her own appearance output on the content video and utilize it.

5 is a flowchart illustrating an image processing method according to an embodiment of the present invention. The image processing method according to one embodiment shown in FIG. 5 includes steps that are processed in a time-series manner in the system shown in FIG. Accordingly, the following description is also applied to the image processing method performed according to the embodiment shown in FIG.

Referring to FIG. 5, in step S500, the set-top box 120 may receive a content image from a media server.

In step S510, the set-top box 120 may receive, from the image providing server 110, an image corresponding to each frame of the image photographed through the user terminal 100. [

In step S520, the set-top box 120 may display the received image on a web view browser.

In step S530, the set-top box 120 may overlay the WebView browser on the player on which the content video is played.

The image processing method described with reference to FIG. 5 may be implemented in the form of a computer program stored in a medium, or in the form of a recording medium including instructions executable by a computer such as a program module executed by a computer. Computer readable media can be any available media that can be accessed by a computer and includes both volatile and nonvolatile media, removable and non-removable media. In addition, the computer-readable medium may include both computer storage media and communication media. Computer storage media includes both volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data. Communication media typically includes any information delivery media, including computer readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave, or other transport mechanism.

It will be understood by those skilled in the art that the foregoing description of the present invention is for illustrative purposes only and that those of ordinary skill in the art can readily understand that various changes and modifications may be made without departing from the spirit or essential characteristics of the present invention. will be. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive. For example, each component described as a single entity may be distributed and implemented, and components described as being distributed may also be implemented in a combined form.

The scope of the present invention is defined by the appended claims rather than the detailed description and all changes or modifications derived from the meaning and scope of the claims and their equivalents are to be construed as being included within the scope of the present invention do.

100: user terminal
110: image providing server
120: Set-top box

Claims (19)

In an image processing method performed in a set-top box,
Receiving a content image from a media server;
Receiving from the image providing server an image corresponding to each frame of the image photographed through the user terminal;
Displaying the received image on a web view browser; And
Overlaying the WebView browser on the player on which the content video is played
The image processing method comprising the steps of: The method according to claim 1,
The step of displaying the received image on a web view browser
Controlling the transparency of the WebView browser such that the image is projected onto the content image
The image processing method comprising the steps of: The method according to claim 1,
Wherein the image is divided into an object and a background based on an alpha (Alpha) map received from the user terminal,
Wherein the background of the image is processed transparently. The method according to claim 1,
The step of receiving, from the image providing server, an image corresponding to each frame of the image photographed through the user terminal
Measuring an initial latency;
Calculating an image request time by reflecting the initial latency at a current time of requesting the image; And
Requesting an image corresponding to the image request time to the image providing server
The image processing method comprising the steps of: 5. The method of claim 4,
And the image is matched and stored at a reception time from the user terminal of the image providing server. The method according to claim 1,
Receiving a user input controlling the image; And
Controlling the position of the image or the size of the image based on the user input
Further comprising the steps of: The method according to claim 1,
Receiving a user input requesting transmission of the image; And
Requesting the image providing server to transmit an image corresponding to the reception time of the user input
Further comprising the steps of: The method according to claim 1,
Receiving a user input requesting transmission of the image; And
Transmitting a frame corresponding to a reception time of the user input among the frames of the content image to the image providing server; And
Requesting the image providing server to transmit a frame of a content image corresponding to a reception time of the user input and an image corresponding to a reception time of the user input
Further comprising the steps of: In the set-top box,
A content receiving unit for receiving a content image from a media server;
An image receiving unit for receiving, from an image providing server, an image corresponding to each frame of the image photographed through the user terminal; And
Displaying the received image on a web view browser and overlaying the web view browser on a player on which the content video is played back,
Lt; / RTI > 10. The method of claim 9,
Wherein the image output unit controls transparency of the WebView browser such that the image is projected onto the content image. 10. The method of claim 9,
The image receiving unit
The initial latency is measured,
Calculating an image request time by reflecting the initial latency at a current time of requesting the image,
And requests an image corresponding to the image request time to the image providing server. 10. The method of claim 9,
A user input receiving a user input for controlling the image;
Further comprising:
Wherein the image output unit controls the position of the image or the size of the image based on the user input. 10. The method of claim 9,
A user input receiving unit for receiving a user input requesting transmission of the image; And
An image providing server for requesting transmission of an image corresponding to a reception time of the user input to the image providing server,
Lt; RTI ID = 0.0 > set-top box. ≪ / RTI > 14. The method of claim 13,
The image providing unit
A frame corresponding to the reception time of the user input among frames of the content image is transmitted to the image providing server,
And requests the image providing server to transmit a frame of the content image corresponding to the reception time of the user input and the image corresponding to the reception time of the user input. In an image processing system,
An image providing server; And
Set-top box
, ≪ / RTI &
The image providing server
Receiving a first image and an alpha value corresponding to each frame of an image photographed through the user terminal from a user terminal,
Generate a second image based on the first image and the alpha value,
And to transmit the second image to the settop box,
The set-
Receiving a content image from a media server,
Displaying a second image received from the image providing server on a web view browser,
And to overlay the WebView browser on the player on which the content video is played. 16. The method of claim 15,
The user terminal
Extracting an alpha value of a first image corresponding to each frame of an image photographed through the user terminal,
And to separate the object and the background of the first image based on the alpha value. 16. The method of claim 15,
Wherein the image providing server is configured to transparently process the background of the first image based on the alpha value to generate the second image. 16. The method of claim 15,
The set-
Receiving a user input requesting transmission of the second image,
And transmit the second image transmission request including the reception time of the user input to the image providing server,
The image providing server
And to transmit a second image corresponding to the reception time of the user input to the user terminal. 16. The method of claim 15,
The set-
Receiving a user input requesting transmission of the image,
A frame corresponding to the reception time of the user input among frames of the content image is transmitted to the image providing server,
And transmit the second image transmission request including the reception time of the user input to the image providing server,
The image providing server
Synthesizing a frame and a second image corresponding to a reception time of a user input received from the set-top box,
And transmit the synthesized image to the user terminal.

Images