KR102019226B1 - Mobile set-top box, and control method thereof - Google Patents

Abstract

The present invention relates to a mobile set-top box integrated with a beam projector that can solve the limitation of the IPTV service receiving space of the existing set-top box is connected to a router providing a Internet connection environment and wired, and its operation method.

Description

Mobile set-top box and its operation method {MOBILE SET-TOP BOX, AND CONTROL METHOD THEREOF}

The present invention relates to a mobile set-top box is implemented to be able to form its own image based on the configuration combined with the beam projector with respect to IPTV service.

Recently, with the commercialization of digital-based digital television technology, it is possible to provide various contents through a network such as the Internet connected to each home, and IPTV (Internet Protocol Television) service is a representative example.

The IPTV service refers to a service that provides various service contents including, for example, broadcast content, Internet content, Video on Demand (VoD) service, etc. to a subscriber through the Internet.

In such an IPTV service, a service server, which is a service provider, provides service contents, and the set-top box installed in the home can relay the service contents received from the service server in such a way that the playback apparatus (IPTV) can play them.

However, the existing set-top box should be installed in a limited space in the house because it is connected to a router that provides an in-house internet access environment during installation, which means that subscribers can use IPTV service only in a limited place in the house. can do.

The present invention was created in view of the above circumstances, and an object of the present invention is to propose a mobile set-top box that can solve the limitations of the IPTV service receiving space.

A mobile set-top box according to an embodiment of the present invention for achieving the above object, Decision unit for determining the data type of the image data to be received from the service server based on the status information of the wireless network in relation to the IPTV service; A receiver which accesses the service server through the wireless network and receives the image data; And a processing unit processing to form an image by using light irradiated according to the image data.

Specifically, the determining unit may determine the data type of the image data based on whether the predicted data rate identified from the state information of the wireless network satisfies the minimum data rate required for receiving the image data.

Specifically, the minimum data rate is determined differently according to the size of the image by at least one of the image forming distance from the mobile set-top box to the point at which the image is formed, and the image setting magnification set in the mobile set-top box. The larger the size of the image, the higher the data rate can be determined.

Specifically, when the prediction data rate does not satisfy the minimum data rate, the determination unit may adjust the image quality of the image data according to the data type of the image data according to the prediction data rate, or the image quality adjustment type. The pixel adjustment type may be determined by omitting pixel values of some pixel areas of the entire pixel area.

In detail, when the image quality of the pixel adjustment type image data is required to be improved, the mobile set-top box uses the pixel values of at least some pixel areas included in the image data to display the remaining pixel areas in which the pixel values are omitted. The apparatus may further include a reconstruction unit for reconstructing the pixel value.

In detail, the image data includes a specific pixel region in which a pixel value is omitted, and two or more pixel regions neighboring the specific pixel region and in which a pixel value exists, and the reconstruction unit includes pixels of each of the two or more pixel regions. The pixel value of the specific pixel region may be restored using the value.

Specifically, when the pixel value is the same between the two or more pixel areas, the reconstructor restores the pixel value of the specific pixel area to the same pixel value as the two or more pixel areas, and when the pixel values are different between the two or more pixel areas. The pixel value of the specific pixel region may be restored to an average pixel value of the two or more pixel regions.

A method of operating a mobile set-top box according to an embodiment of the present invention for achieving the above object is to determine the data type of the image data to be received from the service server based on the status information of the wireless network with respect to the IPTV service step; A reception step of receiving the image data by accessing the service server through the wireless network; And a processing step of forming an image by using light irradiated according to the image data.

In detail, the determining may determine the data type of the image data based on whether the predicted data rate identified from the state information of the wireless network satisfies the minimum data rate required for receiving the image data.

Specifically, the minimum data rate is determined differently according to the size of the image by at least one of the image forming distance from the mobile set-top box to the point at which the image is formed, and the image setting magnification set in the mobile set-top box. The larger the size of the image, the higher the data rate can be determined.

Specifically, in the determining step, when the predicted data rate does not satisfy the minimum data rate, the image quality adjustment type in which the data type of the image data is adjusted according to the predicted data rate, or the image. The pixel adjustment type may be determined by omitting pixel values of at least some pixel areas of all the pixel areas constituting the N s.

Specifically, in the method, if the image quality improvement of the pixel adjustment type image data is required before the processing step, the pixel value is omitted by using pixel values of at least some pixel regions included in the image data. The method may further include a restoration step of restoring pixel values of the remaining pixel areas.

In detail, the image data includes a specific pixel region in which a pixel value is omitted, and two or more pixel regions neighboring the specific pixel region and in which a pixel value exists. The pixel value of the specific pixel region may be restored using the pixel value.

Specifically, in the reconstructing step, when the pixel values are the same between the two or more pixel areas, the pixel values of the specific pixel area are restored to the same pixel value as the two or more pixel areas, and the pixel values are different between the two or more pixel areas. In this case, the pixel value of the specific pixel region may be restored to the average pixel value of the two or more pixel regions.

Accordingly, according to the mobile set-top box according to the present invention and a method of operating the same, by suggesting a configuration of a mobile set-top box integrated with a beam projector, the IPTV service received by an existing set-top box connected to a router providing an internet connection environment by wire is received. Space constraints can be solved.

1 is a schematic structural diagram of an IPTV service system according to an embodiment of the present invention;
Figure 2 is a schematic diagram of a mobile set-top box according to an embodiment of the present invention.
3 is an exemplary diagram of a pixel area for explaining an omitted pixel value reconstruction method according to an embodiment of the present invention.
4 to 6 is a flow chart for explaining the operation flow in the mobile set-top box according to an embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings will be described an embodiment of the present invention.

1 shows a schematic configuration of an IPTV service system according to an embodiment of the present invention.

As shown in FIG. 1, an IPTV service system according to an exemplary embodiment of the present invention may have a configuration including a service server 10 and a mobile set-top box 20.

The service server 10 refers to a service provider that provides service content including, for example, broadcast content, Internet content, Video on Demand (VoD) content, and the like in connection with an IPTV service. For example, a broadcast server , A VoD server, a metadata server, and a subscriber management unit.

The service server 10 may be implemented in the form of, for example, a web server, a database server, a proxy server, and the like, and may include one or more of a network load balancing mechanism, or various software for allowing a service device to operate on the Internet or another network. Can be installed and can also be implemented as a computerized system. In addition, the network may be an http network, may be a private line, an intranet, or any other network, and furthermore, the connection between each component in the targeting advertising system according to an embodiment of the present invention may be any data. It can be connected to a secure network so that it is not attacked by hackers or other third parties.

The mobile set-top box 20 refers to a receiving device for receiving service content received from the service server 10, and the service content from the service server 10 through a method of accessing the service server 10 through the wireless Internet. Hereinafter, referred to as "image data" can be received.

As described above, since the mobile set-top box 20 according to an embodiment of the present invention is premised on the wireless Internet connection, a wired connection with a separate router for providing an Internet connection environment as in the existing IPTV service is provided. This is not necessary.

In addition, in the case of the mobile set-top box 20 according to an embodiment of the present invention, the image data received from the service server 10 without a separate playback device (for example, IPTV) is based on the configuration combined with the beam projector. It is possible to form your own image on the basis.

As a result, the IPTV service system according to an embodiment of the present invention can solve the limitation of the IPTV service receiving space due to the installation characteristics of the existing set-top box connected to the router based on the above-described configuration. The configuration of the movable set-top box 20 will be described in more detail.

Figure 2 shows a schematic configuration of a mobile set-top box 20 according to an embodiment of the present invention.

As shown in FIG. 2, the mobile set-top box 20 according to an exemplary embodiment of the present invention includes a determination unit 21 for determining a data type of image data, a receiver 22 for receiving image data, and image data. It may have a configuration including a restoring unit 23 for restoring, and a processing unit 24 for forming an image.

The whole or at least part of the configuration of the mobile set-top box 20 may be implemented in the form of a hardware module or a software module, or may be implemented in the form of a combination of a hardware module and a software module.

Here, the software module may be understood as an instruction executed by a processor for processing an operation in the mobile set-top box 20, and such an instruction may have a form mounted in a memory in the mobile set-top box 20.

On the other hand, the mobile set-top box 20 according to an embodiment of the present invention is a beam projector 25 having a form integrated with the mobile set-top box 20, and the RF module responsible for the actual communication function with the service server 10. The communication unit 26 may further include a configuration.

Here, the communication unit 26 may include, but is not limited to, for example, an antenna system, an RF transceiver, one or more amplifiers, tuners, one or more oscillators, digital signal processors, codec chipsets, and memories, and the like. Any known circuit to be performed may be included.

As a result, the mobile set-top box 20 according to an embodiment of the present invention may form image data received from the service server 10 as an image through the above-described configuration. Hereinafter, a mobile set-top box for realizing this ( Each configuration of 20) will be described in detail.

The determination unit 21 performs a function of determining the data type of the image data.

More specifically, the determination unit 21 determines the data type of the image data to be received from the service server 10 to use the IPTV service.

Here, the data type of the image data includes the original type that receives the original data of the image data as it is, the image quality adjustment type that adjusts the image quality of the image data, and pixel values of some pixel regions of all pixel regions constituting the image data. It can be divided into omitted pixel adjustment type.

At this time, the determination unit 21 may determine the data type of the image data by using the state information (eg, RSSI) of the currently accessible wireless network (eg, 4G, 5G, WI-FI).

Specifically, the determiner 21 determines the data type of the image data based on whether the predicted data rate identified from the state information of the wireless network satisfies the minimum data rate required for receiving the image data.

That is, the determination unit 21 is a source of the data type of the image data when the predicted data rate confirmed from the state information of the wireless network satisfies the minimum data rate required to receive the image data (prediction data rate ≥ minimum data rate) On the other hand, if the predicted data rate does not satisfy the minimum data rate required to receive the image data (predicted data rate <minimum data rate), the data type of the image data is set to the image quality adjustment type or the pixel adjustment type. It can be decided.

Meanwhile, the minimum data rate, which is a reference for determining the data type of the image data, may be determined differently according to the size of the image to be implemented through the beam projector, and the size of the image may be determined by the image from the mobile set-top box 20. It can be determined by the image forming distance, which is the distance to the point to be formed (image consolidation point), and the image setting magnification set by the mechanical operation on the beam projector 25 having a form integrated with the movable set-top box 20. .

For reference, the image forming distance herein may be measured using a known technique such as a distance measuring technique using an ultrasonic sensor.

In this regard, the minimum data rate, which is determined differently according to the size of the image, may be determined as a higher data rate as the size of the image becomes larger. This is due to the fact that data is required.

The receiver 22 performs a function of receiving image data.

More specifically, when the determination of the data type of the image data to be received is completed, the receiving unit 21 is connected to the service server 10 via a wireless network to receive the image data of the determined data type from the service server 10 do.

In this case, when the image data is requested from the mobile set-top box 20, the service server 10 checks the data type of the requested image data and provides the image data of the identified data type to the mobile set-top box 20. To this end, the service server 10 may adopt a method of generating and providing image data for each data type in real time or selecting and providing already provided image data.

The decompression unit 23 performs a function of restoring the image data.

More specifically, the restoration unit 23 receives the pixel adjustment type image data from the service server 10, and when the image quality improvement of the received image data is required, among the entire pixel areas constituting the image of the image data. The pixel value of the pixel area in which the pixel value is omitted is restored.

In this case, the reconstructor 23 may reconstruct the pixel values of the remaining pixel areas in which the pixel values are omitted by using a pixel value of at least some pixel areas included in the image data.

Here, in the case of the pixel adjustment type image data, a pixel value may be omitted by alternately changing each pixel region with respect to a plurality of pixel regions consecutively arranged adjacent to each other, and in this case, the pixel data may be omitted. A specific pixel region and two or more pixel regions arranged adjacent to the specific pixel region and having a pixel value.

In this case, the reconstructor 23 may reconstruct the pixel value of the specific pixel area in which the pixel value is omitted by using the pixel value of each of two or more pixel areas in which the pixel value exists.

In detail, the reconstructor 23 checks a pixel value of each of two or more pixel areas in which the pixel value exists, and when the pixel value is the same as a result of the checking, the specific pixel in which the pixel value is omitted by the same pixel value as the checked pixel value. If the identified pixel values are different, the pixel value of the specific pixel region in which the pixel value is omitted may be restored to the average value of each identified pixel value.

For example, referring to FIG. 3, a plurality of pixel areas have a square lattice shape, and are arranged adjacent to the first pixel area a and the first pixel area a in which pixel values are omitted, and pixel values exist. The second pixel region (b) to the fifth pixel region (e) may exist.

In this case, when the pixel value of each of the second pixel area b to the fifth pixel area e is confirmed, and the pixel value is the same as the result of the checking, the first pixel area a is the same pixel value as the confirmed pixel value. If the identified pixel value is different, the pixel value of the first pixel region a may be restored to the average value of each identified pixel value.

The processor 24 performs a function of forming an image corresponding to the image data.

More specifically, when the reception or restoration of the image data is completed, the processor 24 transmits the image data to the beam projector 25 having a form integrated with the mobile set-top box 20, thereby irradiating according to the image data. The light is processed to form an image.

As described above, according to the configuration of the mobile set-top box 20 according to an embodiment of the present invention, by suggesting the configuration of the mobile set-top box 20 integrated with the beam projector, a router for providing an Internet connection environment It can solve the limitation of IPTV service receiving space of the existing set-top box with wired connection. In addition, by determining the data type of the image data received from the service server 20 in consideration of the state information of the wireless network to which the mobile set-top box 20 is connected, it is possible to support a stable IPTV service even in a wireless network environment.

Hereinafter, an operation method of the mobile set-top box 20 according to an embodiment of the present invention will be described with reference to FIGS. 4 to 6.

4 to 6 are schematic flowcharts for describing a method of operating the mobile set-top box 20 according to an embodiment of the present invention.

First, referring to FIG. 4, the determination unit 21 determines a data type of image data to be received from the service server 10 in order to use the IPTV service (S10-S20).

Here, the data type of the image data includes the original type that receives the original data of the image data as it is, the image quality adjustment type that adjusts the image quality of the image data, and pixel values of some pixel regions of all pixel regions constituting the image data. It can be divided into omitted pixel adjustment type.

At this time, the determination unit 21 may determine the data type of the image data by using the state information (eg, RSSI) of the currently accessible wireless network (eg, 4G, 5G, WI-FI).

Specifically, referring to FIG. 5, the determination unit 21 determines the data type of the image data based on whether the predicted data rate confirmed from the state information of the wireless network satisfies the minimum data rate required for receiving the image data. .

That is, the determination unit 21 is a source of the data type of the image data when the predicted data rate confirmed from the state information of the wireless network satisfies the minimum data rate required to receive the image data (prediction data rate ≥ minimum data rate) On the other hand, if the predicted data rate does not satisfy the minimum data rate required to receive the image data (predicted data rate <minimum data rate), the data type of the image data is set to the image quality adjustment type or the pixel adjustment type. Can be determined (S21-S24).

Meanwhile, the minimum data rate, which is a reference for determining the data type of the image data, may be determined differently according to the size of the image to be implemented through the beam projector. The size of the image may be determined by the image from the mobile set-top box 20. It can be determined by the image forming distance, which is the distance to the point to be formed (image consolidation point), and the image setting magnification set by the mechanical operation on the beam projector 25 having a form integrated with the movable set-top box 20. .

For reference, the image forming distance herein may be measured using a known technique such as a distance measuring technique using an ultrasonic sensor.

In this regard, the minimum data rate, which is determined differently according to the size of the image, may be determined as the higher data rate as the size of the image becomes larger, which is higher in image formation than in a larger image than in a small image. This is due to the fact that data is required.

Referring back to FIG. 4, when the determination of the data type of the image data to be received is completed, the reception unit 21 accesses the service server 10 through the wireless network and supplies the image data of the determined data type to the service server 10. It receives from (S30).

In this case, when the image data is requested from the mobile set-top box 20, the service server 10 checks the data type of the requested image data and provides the image data of the identified data type to the mobile set-top box 20. To this end, the service server 10 may adopt a method of generating and providing image data for each data type in real time or selecting and providing already provided image data.

On the other hand, the restoration unit 23 receives the pixel adjustment type image data from the service server 10, and if the image quality improvement is required for the received image data, the pixel value of the entire pixel area constituting the image of the image data Pixel values of the omitted pixel region are restored (S40-S60).

In this case, the reconstructor 23 may reconstruct the pixel values of the remaining pixel areas in which the pixel values are omitted by using a pixel value of at least some pixel areas included in the image data.

Here, in the case of the pixel adjustment type image data, a pixel value may be omitted by alternately changing each pixel region with respect to a plurality of pixel regions consecutively arranged adjacent to each other, and in this case, the pixel data may be omitted. A specific pixel region and two or more pixel regions arranged adjacent to the specific pixel region and having a pixel value.

In this case, the reconstructor 23 may reconstruct the pixel value of the specific pixel area in which the pixel value is omitted by using the pixel value of each of two or more pixel areas in which the pixel value exists.

Specifically, referring to FIG. 6, when the pixel value of each of two or more pixel areas in which the pixel value exists is confirmed and the pixel value is the same as the result of the checking, the reconstructor 23 performs the pixel with the same pixel value as the confirmed pixel value. If a pixel value of a specific pixel region in which the value is omitted is restored, and if each identified pixel value is different, the pixel value of the specific pixel region in which the pixel value is omitted may be restored to the average value of each identified pixel value. It can be (S61-S64).

Referring back to FIG. 4, when the reception or restoration of the image data is completed, the processor 24 transmits the image data to the beam projector 25 having a form integrated with the mobile set-top box 20, thereby transmitting the image data. Process to form an image using the light irradiated according to (S70)

As described above, according to the operation method of the mobile set-top box 20 according to an embodiment of the present invention, by providing a configuration of the mobile set-top box 20 integrated with the beam projector, a router for providing an Internet connection environment It can solve the limitation of IPTV service receiving space of the existing set-top box that is connected to the network. In addition, by determining the data type of the image data received from the service server 20 in consideration of the state information of the wireless network to which the mobile set-top box 20 is connected, it is possible to support a stable IPTV service even in a wireless network environment.

Meanwhile, the functional operations and implementations of the subject matter described in this specification may be implemented in digital electronic circuitry, computer software, firmware or hardware including the structures and structural equivalents disclosed herein, or one or more of them. It can be implemented in combination. Implementations of the subject matter described herein may be embodied as one or more modules related to computer program instructions encoded on a program storage medium of tangible type for controlling or by the operation of one or more computer program products, ie control systems. Can be implemented.

The computer readable medium may be a machine readable storage device, a machine readable storage substrate, a memory device, a composition of materials affecting a machine readable propagated signal, or a combination of one or more thereof.

As used herein, the term "system" or "apparatus" encompasses all the mechanisms, devices, and machines for controlling data, including, for example, programmable processors, computers, or multiple processors or computers. The control system may include, in addition to hardware, code that forms an execution environment for a computer program on demand, such as code constituting processor firmware, a protocol stack, a database management system, an operating system, or a combination of one or more thereof. .

Computer programs (also known as programs, software, software applications, scripts, or code) may be written in any form of programming language, including compiled or interpreted languages, or a priori or procedural languages. It can be deployed in any form, including components, subroutines, or other units suitable for use in a computer environment. Computer programs do not necessarily correspond to files in the file system. A program may be in a single file provided to the requested program, in multiple interactive files (eg, a file that stores one or more modules, subprograms, or parts of code), or part of a file that holds other programs or data. (Eg, one or more scripts stored in a markup language document). The computer program may be deployed to run on a single computer or on multiple computers located at one site or distributed across multiple sites and interconnected by a communication network.

Computer-readable media suitable for storing computer program instructions and data, on the other hand, include, for example, semiconductor memory devices such as EPROM, EEPROM, and flash memory devices, such as magnetic disks such as internal hard disks or external disks, magneto-optical disks, and CDs. It may include all types of nonvolatile memory, media and memory devices, including -ROM and DVD-ROM disks. The processor and memory can be supplemented by or integrated with special purpose logic circuitry.

Implementations of the subject matter described herein may include, for example, a backend component such as a data server, or include a middleware component such as, for example, an application server, or a web browser or graphical user, for example, where a user may interact with the implementation of the subject matter described herein. It may be implemented in a computing system that includes a front end component, such as a client computer with an interface, or any combination of one or more of such back end, middleware or front end components. The components of the system may be interconnected by any form or medium of digital data communication such as, for example, a communication network.

Although the specification includes numerous specific implementation details, these should not be construed as limiting to any invention or the scope of the claims, but rather as a description of features that may be specific to a particular embodiment of a particular invention. It must be understood. Likewise, certain features described herein in the context of separate embodiments may be implemented in combination in a single embodiment. Conversely, various features that are described in the context of a single embodiment can also be implemented in multiple embodiments individually or in any suitable subcombination. Furthermore, while the features may operate in a particular combination and may be initially depicted as so claimed, one or more features from the claimed combination may in some cases be excluded from the combination, the claimed combination being a subcombination Or a combination of subcombinations.

In addition, although the drawings depict operations in a particular order, it is to be understood that such operations must be performed in the specific order or sequential order shown in order to obtain desirable results or that all illustrated acts must be performed. Can not be done. In certain cases, multitasking and parallel processing may be advantageous. Moreover, the separation of the various system components of the above-described embodiments should not be understood as requiring such separation in all embodiments, and the described program components and systems will generally be integrated together into a single software product or packaged into multiple software products. Should understand that

As such, this specification is not intended to limit the invention to the specific terms presented. Thus, while the present invention has been described in detail with reference to the above examples, those skilled in the art can make modifications, changes, and variations to the examples without departing from the scope of the invention. The scope of the present invention is shown by the following claims rather than the detailed description, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included in the scope of the present invention. do.

According to the present invention, a mobile set-top box and an operation method thereof have limitations of existing technologies in that they propose a mobile set-top box capable of forming an image of itself based on a configuration combined with a beam projector in relation to an IPTV service. The invention is an industrially available invention because it is not only sufficient for the use of the related technology but also the possibility of marketing or operating the applied device as well as being practically obvious.

10: service server
20: mobile set-top box
21: determination unit 22: receiving unit
23: restoration unit 24: processing unit

Claims (14)

A determination unit for determining a data type of image data to be received from the IPTV service server based on state information of a wireless network in relation to an IPTV service;
A receiver which accesses the IPTV service server through the wireless network and receives the image data; And
It includes a processing unit for processing to form an image using the light irradiated according to the image data,
If the image quality improvement is required for the image data of the pixel adjustment type omitting the pixel value of some pixel areas of the entire pixel area constituting the image,
And a restoration unit for restoring pixel values of the remaining pixel areas from which pixel values are omitted by using pixel values of at least some pixel areas included in the image data. The method of claim 1,
The determining unit,
And a data type of the image data is determined based on whether the predicted data rate confirmed from the state information of the wireless network satisfies the minimum data rate required for receiving the image data. The method of claim 2,
The minimum data rate is,
The image forming distance from the mobile set-top box to the point at which the image is formed is determined differently according to the size of the image by at least one of the image setting magnification set in the mobile set-top box,
Mobile set-top box characterized in that the larger the size of the image is determined by a higher data rate. The method of claim 2,
The determining unit,
If the predicted data rate does not satisfy the minimum data rate, a quality adjustment type in which the image quality of the image data is adjusted according to the predicted data rate, or a part of all pixel regions constituting the image. A mobile set-top box, characterized in that the pixel value of the pixel area is determined by omitting the pixel adjustment type. delete The method of claim 1,
The video data,
A specific pixel region in which a pixel value is omitted, and two or more pixel regions neighboring the specific pixel region and in which a pixel value exists;
The restoration unit,
And a pixel value of the specific pixel region is restored using pixel values of each of the two or more pixel regions. The method of claim 6,
The restoration unit,
If the pixel values are the same between the two or more pixel areas, the pixel values of the specific pixel area are restored to the same pixel value as the two or more pixel areas.
And a pixel value of the specific pixel area is restored to an average pixel value of the two or more pixel areas if the pixel values are different between the two or more pixel areas. Determining a data type of image data to be received from the IPTV service server based on state information of a wireless network in relation to an IPTV service;
A receiving step of accessing the IPTV service server through the wireless network and receiving the image data; And
A processing step of forming an image using light irradiated according to the image data;
At least some pixel areas included in the image data when the image quality improvement is required for the pixel adjustment type image data in which at least some pixel areas of the entire pixel areas constituting the image are omitted before the processing step. And reconstructing a pixel value of the remaining pixel region in which the pixel value is omitted using the pixel value of the mobile set-top box. The method of claim 8,
The determining step,
And determining a data type of the image data based on whether the predicted data rate confirmed from the state information of the wireless network satisfies the minimum data rate required for receiving the image data. The method of claim 9,
The minimum data rate is,
The image forming distance from the mobile set-top box to the point at which the image is formed is determined differently according to the size of the image by at least one of the image setting magnification set in the mobile set-top box,
The operation method of the mobile set-top box characterized in that the larger the size of the image is determined to a higher data rate. The method of claim 9,
The determining step,
If the predicted data rate does not satisfy the minimum data rate, at least one of an image quality adjustment type in which the image quality of the image data is adjusted according to the predicted data rate, or the entire pixel area constituting the image. A method of operating a mobile set-top box, characterized in that the pixel value of the part of the pixel area is determined by omitting the pixel adjustment type. delete The method of claim 8,
The video data,
A specific pixel region in which a pixel value is omitted, and two or more pixel regions neighboring the specific pixel region and in which a pixel value exists;
The restoration step,
And a pixel value of the specific pixel region is restored by using pixel values of each of the two or more pixel regions. The method of claim 13,
The restoration step,
If the pixel values are the same between the two or more pixel areas, the pixel values of the specific pixel area are restored to the same pixel value as the two or more pixel areas.
And when the pixel values differ between the two or more pixel areas, restoring the pixel value of the specific pixel area to an average pixel value of the two or more pixel areas.

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