KR20130042327A - Method for operating an image display apparatus - Google Patents

Method for operating an image display apparatus Download PDF

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Publication number
KR20130042327A
KR20130042327A KR1020110106573A KR20110106573A KR20130042327A KR 20130042327 A KR20130042327 A KR 20130042327A KR 1020110106573 A KR1020110106573 A KR 1020110106573A KR 20110106573 A KR20110106573 A KR 20110106573A KR 20130042327 A KR20130042327 A KR 20130042327A
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KR
South Korea
Prior art keywords
response
request message
server
cache
image display
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Application number
KR1020110106573A
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Korean (ko)
Inventor
황고운
서일근
민경오
Original Assignee
엘지전자 주식회사
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Priority to KR1020110106573A priority Critical patent/KR20130042327A/en
Publication of KR20130042327A publication Critical patent/KR20130042327A/en

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/20Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/23Processing of content or additional data; Elementary server operations; Server middleware
    • H04N21/231Content storage operation, e.g. caching movies for short term storage, replicating data over plural servers, prioritizing data for deletion
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/20Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/23Processing of content or additional data; Elementary server operations; Server middleware
    • H04N21/235Processing of additional data, e.g. scrambling of additional data or processing content descriptors
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00Television systems
    • H04N7/16Analogue secrecy systems; Analogue subscription systems
    • H04N7/173Analogue secrecy systems; Analogue subscription systems with two-way working, e.g. subscriber sending a programme selection signal

Abstract

According to an embodiment of the present invention, a method of operating an image display apparatus includes transmitting a first test request message to a first server, and receiving a first response corresponding to the first test request message. Sending a second test request message to a second server, receiving a second response corresponding to the second test request message, and based on the first response and the second response, a no-cache. And transmitting the request message set to.

Figure P1020110106573

Description

Method for operating an image display apparatus

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image display apparatus and an operation method thereof, and more particularly, to an image display apparatus and an operation method thereof that can improve the usability of a user.

The image display device is a device having a function of displaying an image that a user can watch. The user can watch the broadcast through the image display device. A video display device displays a broadcast selected by a user among broadcast signals transmitted from a broadcast station on a display. Currently, broadcasting is shifting from analog broadcasting to digital broadcasting worldwide.

Digital broadcasting refers to broadcasting for transmitting digital video and audio signals. Digital broadcasting is more resistant to external noise than analog broadcasting, so it has less data loss, is advantageous for error correction, has a higher resolution, and provides a clearer picture. In addition, unlike analog broadcasting, digital broadcasting is capable of bidirectional services.

SUMMARY OF THE INVENTION An object of the present invention is to provide an image display apparatus and an operation method thereof capable of receiving and playing contents through a network.

In addition, another object of the present invention is to provide an image display apparatus and an operation method thereof that can improve user convenience.

According to another aspect of the present invention, there is provided a method of operating an image display device, the method comprising: transmitting a first test request message to a first server; receiving a response, sending a second test request message to a second server, receiving a second response corresponding to the second test request message, and based on the first response and the second response, Sending a request message set to a no-cache.

In accordance with an aspect of the present invention, there is provided a method of operating an image display apparatus, the method including transmitting a test request message to a reference server, receiving a response corresponding to the test request message, and receiving the received response. Comparing the previously stored reference response to the previously stored reference response and transmitting a request message set to no-cache to the content server when the received response is different from the previously stored reference response.

According to the present invention, content can be received and played back without malfunction through a network, thereby improving user convenience.

1 is a diagram schematically illustrating a video display device system according to an exemplary embodiment of the present invention.
2 is a block diagram illustrating an image display apparatus according to an exemplary embodiment of the present invention.
3 and 5 are views referred to for explaining a process of receiving content.
6 is a flowchart illustrating a method of operating an image display apparatus according to an exemplary embodiment of the present invention.
FIG. 7 is a diagram referred to describe the operation method of FIG. 6.
8 is a flowchart illustrating a method of operating an image display apparatus according to an exemplary embodiment of the present invention.
FIG. 9 is a diagram referred to describe the operating method of FIG. 8.

Hereinafter, the present invention will be described in more detail with reference to the drawings.

The suffix "module" and " part "for components used in the following description are given merely for convenience of description, and do not give special significance or role in themselves. Accordingly, the terms "module" and "part" may be used interchangeably.

On the other hand, the video display device described herein is an intelligent video display device that can be connected to the network, connected to other devices such as a network and a computer with the support of wired or wireless Internet function, sending and receiving data, email, web browsing, banking Or a game or the like.

1 is a diagram schematically illustrating a video display device system according to an exemplary embodiment of the present invention.

Referring to the drawings, the video display device system according to an embodiment of the present invention, in terms of providing a content service on a broadcast sender basis, is a content provider (CP) 10 and a service provider (Service). It may be divided into a provider (SP) 20, a network provider (NP) 30, and a user 40.

The content provider 10 produces and provides various contents. As shown in FIG. 1, the content provider 10 includes a terrestrial broadcaster, a cable system operator or a multiple system operator, a satellite broadcaster, and an internet broadcaster. An internet broadcaster and the like can be exemplified.

In addition to the broadcast content, the content provider 10 may provide various applications.

The service provider 20 may provide a service package of contents provided by the content provider 10. For example, the service provider 20 of FIG. 1 may package and provide a first terrestrial broadcast, a second terrestrial broadcast, a cable MSO, satellite broadcast, various internet broadcasts, applications, and the like to a user.

Meanwhile, the service provider 20 may provide a service to the user 40 using a unicast or multicast scheme. The unicast method is a method of transmitting data 1: 1 between one sender and one receiver. For example, in the unicast method, when a receiver requests data from a server, the server may transmit data to the receiver according to the request. Multicasting is a method of transmitting data to a plurality of recipients of a specific group. For example, the server can send data to multiple pre-registered receivers at once. For such multicast registration, the Internet Group Management Protocol (IGMP) protocol may be used.

The network provider 30 may provide a network for providing a service to the user 40. The user 40 may be provided with a service by building a home network end user (HNED).

As a means for protecting the content transmitted from the image display device system as described above, conditional access or content protection may be used. As one example for such a restriction reception or content protection, a scheme such as a cable card or a downloadable conditional access system (DCAS) may be used.

On the other hand, the user 40 can also provide content through the network. In this case, unlike the above, the user 40 may be a content provider, and the content provider 10 may receive content from the user 40. Accordingly, an interactive content service or a data service may be possible.

2 is a block diagram illustrating an image display apparatus according to an exemplary embodiment of the present invention.

Referring to FIG. 2, the image display apparatus 100 according to an exemplary embodiment of the present invention may include a broadcast receiver 105, an external device interface 135, a storage 140, a user input interface 150, The controller 170 may include a display unit 180, an audio output unit 185, and a power supply unit 190. The broadcast receiving unit 105 may include a tuner 110, a demodulator 120, and a network interface unit 130. Among them, the tuner 110 and the demodulator 120 may be provided with the network interface unit 130 selectively.

The tuner 110 selects an RF broadcast signal corresponding to a channel selected by a user or all pre-stored channels among RF (Radio Frequency) broadcast signals received through an antenna. Also, the selected RF broadcast signal is converted into an intermediate frequency signal, a baseband image, or a voice signal.

For example, if the selected RF broadcast signal is a digital broadcast signal, it may be converted into a digital IF signal (DIF), and if the analog broadcast signal is an analog baseband video or audio signal (CVBS / SIF).

Meanwhile, the tuner 110 may sequentially select RF broadcast signals of all broadcast channels stored through a channel memory function among RF broadcast signals received through an antenna and convert them to intermediate frequency signals or baseband video or audio signals. have.

The demodulator 120 receives the digital IF signal DIF converted by the tuner 110 and performs a demodulation operation.

The demodulator 120 may output a stream signal TS after performing demodulation and channel decoding. At this time, the stream signal may be a signal in which a video signal, a voice signal, or a data signal is multiplexed.

The stream signal output from the demodulator 120 may be input to the controller 170. After performing demultiplexing, image / audio signal processing, and the like, the controller 170 outputs an image to the display 180 and outputs audio to the audio output unit 185.

The external device interface unit 135 may connect the external device to the image display device 100. To this end, the external device interface unit 135 may include an A / V input / output unit (not shown) or a wireless communication unit (not shown).

The external device interface unit 130 may be connected to an external device such as a DVD (Digital Versatile Disk), Blu-ray (Blu ray), a game device, a camera, a camcorder, a computer (laptop), a set top box, or the like by wire / wireless. It may also perform input / output operations with external devices.

The A / V input / output unit may receive a video and audio signal of an external device. The wireless communication unit may perform short range wireless communication with another electronic device.

The network interface unit 135 provides an interface for connecting the image display apparatus 100 to a wired / wireless network including an internet network. For example, the network interface unit 135 may receive content or data provided by the Internet or a content provider or a network operator through a network.

Meanwhile, the network interface unit 130 may access a predetermined server and a predetermined web page through a connected network or another network linked to the connected network. That is, by accessing a predetermined web page through the network, it is possible to send or receive data with the server. In addition, content or data provided by a content provider or a network operator may be received.

In addition, the network interface unit 130 may select and receive a desired application from among applications that are open to the public through the network.

The storage 140 may store a program for processing and controlling each signal in the controller 170, or may store a signal processed video, audio, or data signal.

In addition, the storage 140 may perform a function for temporarily storing an image, audio, or data signal input from the external device interface 135 or the network interface 130. In addition, the storage 140 may store information on a predetermined broadcast channel through a channel storage function.

The image display apparatus 100 may reproduce and provide a content file (video file, still image file, music file, document file, application file, etc.) stored in the storage 140 to a user.

2 illustrates an embodiment in which the storage 140 is provided separately from the controller 170, but the scope of the present invention is not limited thereto. The storage unit 140 may be included in the control unit 170.

The user input interface unit 150 transmits a signal input by the user to the control unit 170 or a signal from the control unit 170 to the user.

For example, the remote controller 200 transmits / receives a user input signal such as power on / off, channel selection, screen setting, or a local key (not shown) such as a power key, a channel key, a volume key, or a set value. Transmits a user input signal input from the control unit 170, or transmits a user input signal input from the sensor unit (not shown) for sensing the user's gesture to the control unit 170, or the signal from the control unit 170 It can transmit to a sensor unit (not shown).

The control unit 170 demultiplexes the input stream or processes the demultiplexed signals through the tuner 110, the demodulator 120, or the external device interface unit 135, and outputs a video or audio signal. You can create and output.

The image signal processed by the controller 170 may be input to the display 180 and displayed as an image corresponding to the image signal. The video signal processed by the controller 170 may be input to the external output device through the external device interface 135. [

The audio signal processed by the control unit 170 may be output to the audio output unit 185 through audio. In addition, the voice signal processed by the controller 170 may be input to the external output device through the external device interface unit 135.

Although not shown in FIG. 2, the controller 170 may include a demultiplexer, an image processor, and the like.

In addition, the controller 170 may control overall operations of the image display apparatus 100. For example, the controller 170 may control the tuner 110 to control the tuner 110 to select an RF broadcast corresponding to a channel selected by a user or a pre-stored channel.

In addition, the controller 170 may control the image display apparatus 100 by a user command or an internal program input through the user input interface unit 150. In particular, the user may download or play content desired by the user into the video display device 100 by accessing the network.

For example, the controller 170 controls the tuner 110 to input a signal of a selected channel according to a predetermined channel selection command received through the user input interface unit 150. Then, video, audio, or data signals of the selected channel are processed. The controller 170 may output the channel information selected by the user together with the processed video or audio signal through the display 180 or the audio output unit 185.

As another example, the controller 170 may receive an external device image playback command received through the user input interface unit 150 from an external device, for example, a camera or a camcorder, input through the external device interface unit 135. The video signal or the audio signal may be output through the display 180 or the audio output unit 185.

The controller 170 may control the display 180 to display an image. In this case, the image displayed on the display 180 may be a still image or a video, and may be a 2D image or a 3D image.

Meanwhile, the controller 170 may generate a 3D object for a predetermined 2D object among the images displayed on the display 180, and display the 3D object. For example, the object may be at least one of a connected web screen (newspaper, magazine, etc.), an EPG (Electronic Program Guide), various menus, widgets, icons, still images, videos, and text.

Such a 3D object may be processed to have a different depth than the image displayed on the display 180. [ Preferably, the 3D object may be processed to appear protruding from the image displayed on the display 180.

The controller 170 may recognize a location of a user based on an image photographed by a photographing unit (not shown). For example, the distance (z-axis coordinate) between the user and the image display apparatus 100 may be determined. In addition, the x-axis coordinates and the y-axis coordinates in the display 180 corresponding to the user position may be determined.

The display 180 converts an image signal, a data signal, an OSD signal processed by the controller 170, or an image signal, data signal, etc. received from the external device interface unit 135 into R, G, and B signals, respectively. Generate a signal.

The display 180 may be a PDP, an LCD, an OLED, a flexible display, or a 3D display.

The display 180 may be configured as a touch screen and used as an input device in addition to the output device.

The audio output unit 185 receives a signal processed by the controller 170 and outputs the audio signal.

A photographing unit (not shown) photographs the user. The photographing unit (not shown) may be implemented by a single camera, but the present invention is not limited thereto, and may be implemented by a plurality of cameras. Meanwhile, the photographing unit (not shown) may be embedded in the image display device 100 on the display 180 or disposed separately. The image information photographed by the photographing unit (not shown) may be input to the control unit 170.

The controller 170 may detect a user's gesture based on each of the images captured by the photographing unit (not shown) or the sensed signal from the sensor unit (not shown) or a combination thereof.

The power supply unit 190 supplies power to the entire image display apparatus 100. In particular, power may be supplied to the controller 170, which may be implemented in the form of a System On Chip (SOC), a display 180 for displaying an image, and an audio output unit 185 for audio output. have.

To this end, the power supply unit 190 may include a converter (not shown) for converting the AC power into DC power. Meanwhile, for example, when the display 180 is implemented as a liquid crystal panel having a plurality of backlight lamps, an inverter (not shown) capable of PWM operation may be further provided for driving of variable brightness or dimming. have.

The remote control apparatus 200 transmits the user input to the user input interface unit 150. To this end, the remote control apparatus 200 may use RF (Radio Frequency) communication, infrared (IR) communication, Bluetooth, Bluetooth (UWB), ZigBee (ZigBee) method and the like.

In addition, the remote control apparatus 200 may receive an image, an audio or a data signal output from the user input interface unit 150, display it on the remote control apparatus 200 or output an audio or vibration.

The remote control apparatus 200 may transmit coordinate information corresponding to the movement of the remote control apparatus 200 to the image display apparatus 100. As a result, a pointer corresponding to the movement of the remote control apparatus 200 may be displayed on the display of the image display apparatus. As such, since the corresponding pointer is moved and displayed according to the movement in the 3D space, this may be referred to as a 3D pointing device.

Meanwhile, the above-described image display apparatus 100 may be a digital broadcast receiver capable of receiving fixed or mobile digital broadcasting.

Meanwhile, the video display device described in the present specification can be applied to a TV set, a monitor, a mobile phone, a smart phone, a notebook computer, a digital broadcasting terminal, a PDA (personal digital assistant), a portable multimedia player (PMP) And the like.

Meanwhile, a block diagram of the image display device 100 shown in FIG. 2 is a block diagram for an embodiment of the present invention. Each component of the block diagram may be integrated, added, or omitted according to the specifications of the image display apparatus 100 that is actually implemented. That is, two or more constituent elements may be combined into one constituent element, or one constituent element may be constituted by two or more constituent elements, if necessary. In addition, the functions performed in each block are intended to illustrate the embodiments of the present invention, and the specific operations and apparatuses do not limit the scope of the present invention.

On the other hand, the image display device 100, unlike shown in Figure 2, does not include the tuner 110 and the demodulator 120 shown in Figure 2, the network interface unit 130 or the external device interface unit ( Through 135, image content may be received and played back.

The image display apparatus 100 is an example of an image signal processing apparatus which performs signal processing of an image stored in an apparatus or an input image. As another example of the image signal processing apparatus, the set-top box without the display 180 and the audio output unit 185 shown in FIG. 2, the above-described DVD player, Blu-ray player, game device, computer, etc. may be further illustrated. have.

3 and 5 are views for explaining a process of receiving content by the image display apparatus.

FIG. 3 illustrates an example in which the image display apparatus 100 according to an embodiment of the present invention requests and receives a stream of predetermined content by network connection with a content server 300 having a stream of content.

Referring to FIG. 3, first, the video display device 100 requests a request message (http: //) for an additional function index stream such as video skipping and content playback at a selected point. stream_url) for video skip) is transmitted to the content server 300 (S310).

In addition, the video display device 100 transmits a request message (request (http: // stream_url) for video play) requesting a stream for content playback to the content server 300 (S320).

The request message for requesting an index stream and a stream for content reproduction may be transmitted in a cached state to use a cache memory of the image display apparatus. Or, if there is no no-cache configuration, the cache can be used normally.

The controller 170 of the image display device may perform a function of reading or writing data from the storage 140. The storage unit 140 may include a conventional memory and a cache memory. Cache memory is smaller than conventional memory, but can be processed faster by storing frequently read or written data or data that is currently in use. For example, an Internet web browser can set a cache to store data read from a website and read it more quickly when reading the same content.

Meanwhile, the index stream and the stream for reproducing the content may be the same. In other words, the same data can be used for other purposes.

The content server 300 receiving the request message transmits a response corresponding to each request message to the video display device 100 (S330 and S340), and transmits the requested stream data (S350 and S360). )

4 and 5 illustrate an example in which the video display device 100 is connected to the content server 300 via a proxy server 400 to request and receive a stream of predetermined content.

The proxy server is a server that acts as an intermediary between the terminal and the Internet. The proxy server provides security, administrative level regulation, and cache services. The proxy server may be associated with or be part of a gateway server that separates the internal network from the external network, and a firewall server that protects the internal network from external intrusions.

By storing the information the user has accessed over the network in the storage, if the information requested by the user is in the storage, the request can be made faster because the information can be provided to the user without receiving data from a remote place via the network. Can provide a response.

On the other hand, in the case of passing through an arbitrary proxy server, there may be a case in which a hotel, such as a VBN (Visitor Based Network) used for billing purposes, may be used.

In the case of such a proxy server, the cache setting and the cache memory capacity may not be known, and a collision may occur and an error may occur.

For example, the request message and response are normally exchanged between the video display device 100, the proxy server 400, and the content server 300, but the proxy server 400 Due to a malfunction of, a stream may not be delivered. Although the content server 300 normally delivers the stream, the proxy server 400 may not be able to deliver the stream to the video display device 100 while the stream is cached.

An example of such a cache malfunction of the proxy server 400 will be described in detail with reference to FIGS. 4 and 5.

Referring to FIG. 4, the video display device 100 requests a request message (http: // stream_url) for requesting an index stream for additional functions such as skipping video and playing content at a selected point. for video skip) to the content server 300, and the request. The message is routed through the proxy server 400 (S410).

Meanwhile, the proxy server 400 may intercept all requests and responses of the image display apparatus 100 and the content server 300 in the middle, and perform a transfer and an internal operation.

Since the proxy server 400 is the first request message, it confirms that there is no data corresponding to the cache and transmits the request message to the content server 300 (S420).

The content server 300 receiving the request message transmits a corresponding response (S430).

Meanwhile, the proxy server 400 stores and changes the response of the content server 300 and transmits the modified response to the video display device 100 (S440). For example, the change of the response may be a proxy. This may be done by adding a miss cache header to the header of the response that the server 400 did not find in the cache.

Meanwhile, the content server 300 transmits stream data corresponding to the request message to the video display device 100 as a destination (S450). The proxy server 400 caches at least a part of the stream data corresponding to the request message. While storing the information, the image display device 100 transmits the image display device 100 (S460).

Here, the index stream buffer of the image display apparatus 100 has a small storage capacity. Accordingly, the stream data stored in the cache of the proxy server 400 also stores a part of the entire stream data similarly to the buffer capacity for the stream.

In some embodiments, the index stream data may have a smaller capacity than the stream data for content reproduction.

The video display device 100 transmits a request message (request (http: // stream_url) for video play) requesting a stream for content playback to the content server 300 (S470).

On the other hand, the proxy server 400 checks whether the stream data corresponding to the request message is in the cache, and transmits the modified response to the video display device 100 because there is index stream data of the same content. In this case, the header of the response may be transmitted by adding a hit cache header that the proxy server 400 found in the cache.

Thereafter, the proxy server 400 transmits the stream data stored in the cache. (S490) However, the stream data stored in the proxy server 400 is not enough to reproduce the content. Will not play the content.

5 illustrates an example of transmitting an HTTP request message and a TCP request message of an index stream and a data stream, respectively. Since it is similar to that described with reference to FIG. 4, it will be briefly described.

Referring to FIG. 5, in steps S511 to S514, an Http request of the image display apparatus 100 and a response of the proxy server 400 and the content server 300 corresponding to the Http request of the image display apparatus 100 are received. In operation S521 and S522, an Http Request sent by the video display device 100 and a corresponding response process are received to receive data.

The above steps may include a request for information on a content URL, and the subsequent steps may include a request for stream data of actual content.

Meanwhile, steps S531 to S535 are TCP requests of the video display device 100 and response processes of the proxy server 400 and the content server 300 corresponding to the indexes, and S541. In operation S542, a TCP request sent by the image display apparatus 100 and a corresponding response process are received to receive data.

In operation S534, when the size of the index buffer of the image display apparatus 100 is at most 2 MBytes, the size cached by the proxy server 400 is also at most 2 Mbytes.

Accordingly, when the S541 request is made, the image display apparatus 100 receives only data having a maximum size of 2 Mbytes because there is data cached for the index in the proxy server 400. As a result, the image display apparatus 100 may fail to play the content because it does not receive a sufficient amount of playable data, and may wait for data for 180 seconds.

6 is a flowchart illustrating a method of operating an image display apparatus according to an exemplary embodiment of the present invention, and FIG. 7 is a diagram referred to describe the method of operation of FIG. 6. .

First, the image display apparatus 100 transmits a first test request message to the first server (S610), and receives a first response corresponding to the first test request message (S620).

Here, the first server may be a content server, and the video display device 100 may store the first response.

Meanwhile, the image display apparatus 100 transmits a second test request message to the second server (S630), and receives a second response corresponding to the second test request message (S640).

Here, the second server may be a reference server.

On the other hand, the reference server is a server operated by the manufacturer of the image display device to provide additional services, or previously connected to the image display device 100 by the network, the image display device 100 stores the information about the server It can be a server.

Therefore, the image display apparatus 100 may be set to directly transmit and receive data with the reference server.

Thereafter, the image display apparatus 100 transmits a request message set to no-cache based on the first response and the second response (S660).

That is, when there is a place where the signal passes through like a proxy server, the proxy server may set the data to be bypassed without storing the data received in the cache.

Meanwhile, an embodiment of the present invention may transmit a request message set to no-cache when the first response and the second response are different.

Alternatively, an embodiment of the present invention may further include determining whether the third server passes through the first server by comparing the first response with the second response or comparing headers of the respective responses (S640).

Meanwhile, the request message set as the no-cache may be generated by adding a no-cache header to the header of the request message.

In the request message transmitting step S660 set to the no-cache, when the first response and the second response are different, the request message set to the no-cache may be transmitted. That is, if each response is different, it may be determined that a proxy server or the like exists in the middle to set the data to bypass.

The second response may be a response generated by adding a header to the response received by the second server from the first server.

In this case, since there is a change in the header of the second response, the request message transmitting step S660 set to the no-cache may be performed when the first response is different from the portion except for the header added by the second server. And transmitting the request message set to the no-cache.

Thereafter, when the request message is an index, the image display apparatus 100 may transmit a request message of data for video play from the first server to a destination, and receive a stream to play content. .

Referring to FIG. 7, first, the image display apparatus 100 transmits a first test request message to a first server, for example, a content server 300 (S711).

The first test request message may be a separate request message for testing a network connection or a request message for requesting an index stream.

If the proxy server 400 does not exist, the response to the first test request message will be received by the image display apparatus 100 without modification of the response sent by the first server.

However, if the proxy server 400 exists in the middle of the network connection, the response to the first test request message will be received by the image display apparatus 100 after the response sent from the content server 300 is modified.

The proxy server 400 intercepts the first test request message, and the proxy server 400 checks the cache and transmits the first test request message to the content server (S712).

The content server 300 receiving the request message transmits a corresponding response (S721).

On the other hand, the proxy server 400 stores and changes the response of the content server 300 and transmits the modified first header to the video display device 100 (S722).

Meanwhile, the image display apparatus 100 transmits the second test request message to the content server 300 via the second server, for example, the reference server 700, to accurately determine whether the proxy server exists. (S731, S732)

In addition, a response of the content server 300 to the second test request message may also be received via the reference server 700 (S733 and S734).

When the controller 170 compares the first response and the second response and determines that the proxy server 400 exists, the controller 170 adds a request message with a no-cache header to prevent the proxy server 400 from performing a cache operation. To the content server 300 to the destination. (S741).

The proxy server 400 identifying the no-cache header transfers the request message and the response to another server and the video display device without caching the request message and response.

The proxy server 400 transmits the request message for the predetermined content to the content server 300 (S742). In this case, the proxy server 400 may deliver the request message with the no-cache header added thereto.

The content server 300 transmits a response corresponding to the request message for the predetermined content (S743), and the proxy server 400 transmits the response to the video display device (S744).

Therefore, according to the present invention, it is possible to prevent malfunction due to the cache operation of the proxy server.

8 is a flowchart illustrating a method of operating an image display apparatus according to an exemplary embodiment of the present invention, and FIG. 9 is a diagram referred to describe the method of operation of FIG. 8, and more specifically, a signal flow diagram between an image display apparatus and a server. .

Referring to the drawings, the image display apparatus 100 transmits a test request message to the reference server 700 (S810), and receives a response corresponding to the test request message. S820)

If the image display apparatus 100 already knows the information about the reference server and the reference response of the reference server, and the received response is different from the previously stored reference response, the image display apparatus 100 passes through the proxy server. Can be determined.

Therefore, the control unit 170 compares the received response with a pre-stored reference response (S830), if the received response is different from the pre-stored reference response, the content of the request message set to no-cache (no-cache) Send to the server (S840).

Meanwhile, the request message set as no-cache may be generated by adding a no-cache header to the header of the request message.

Thereafter, when the request message is for an index, the image display apparatus 100 may further transmit a request message of data for video play.

In the present embodiment, when not via a known proxy server, it is determined whether it is via the proxy server using a reference response transmitted by the reference server.

Referring to FIG. 9, the image display apparatus 100 exchanges a request message and a response with the reference server 700.

If the proxy server 400 does not exist, the response to the test request message will be the same as the reference response. If the proxy server 400 exists in the middle of the network connection, the response modified by the proxy server 400 will be returned. As it is received, it will be different from the reference response. Therefore, it is possible to determine whether it is via the proxy server and to prevent the cache operation and the malfunction of the proxy server.

According to the present invention, content can be received and played back without malfunction through a network, thereby improving user convenience. More specifically, you can avoid the cache failure of the proxy server.

The image display apparatus and the operation method thereof according to the present invention are not limited to the configuration and method of the embodiments described above, but the embodiments may be applied to all or some of the embodiments May be selectively combined.

Meanwhile, the operation method of the image display apparatus of the present invention can be implemented as a code that can be read by a processor on a recording medium readable by a processor included in the image display apparatus. The processor-readable recording medium includes all kinds of recording apparatuses in which data that can be read by the processor is stored. Examples of the processor-readable recording medium include ROM, RAM, CD-ROM, magnetic tape, floppy disk, optical data storage device, and the like, and may also be implemented in the form of a carrier wave such as transmission over the Internet. . The processor-readable recording medium can also be distributed over network coupled computer systems so that the processor-readable code is stored and executed in a distributed fashion.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present invention.

Claims (12)

Sending a first test request message to a first server;
Receiving a first response corresponding to the first test request message;
Sending a second test request message to a second server;
Receiving a second response corresponding to the second test request message; And
Transmitting a request message set to no-cache based on the first response and the second response.
The method of claim 1,
And comparing the first response with the second response to determine whether the third server passes through the third server.
The method of claim 1,
The request message set to the no-cache is generated by adding a no-cache header to a header of the request message.
The method of claim 1,
The request message transmission step set to the no-cache may include:
And transmitting a request message set to the no-cache when the first response is different from the second response.
The method of claim 1,
And wherein the second response is a response generated by adding a header to a response received by the second server from the first server.
The method of claim 5,
The request message transmission step set to the no-cache may include:
And transmitting a request message set to the no-cache when a portion other than the header added by the second server and the first response are different.
The method of claim 1,
And storing the first response.
The method of claim 1,
And transmitting a request message of data for playing a video.
Sending a test request message to a reference server;
Receiving a response corresponding to the test request message;
Comparing the received response with a previously stored reference response; And
And transmitting a request message set to no-cache to a content server when the received response is different from a previously stored reference response.
10. The method of claim 9,
And if the received response is different from a previously stored reference response, determining that the response is via a proxy server.
10. The method of claim 9,
The request message set to no-cache is generated by adding a no-cache header to a header of the request message.
10. The method of claim 9,
And transmitting a request message of data for playing a video.
KR1020110106573A 2011-10-18 2011-10-18 Method for operating an image display apparatus KR20130042327A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108667536A (en) * 2018-04-26 2018-10-16 国网冀北电力有限公司秦皇岛供电公司 A kind of test method and device for analog signal communication system
US10313207B2 (en) 2014-03-10 2019-06-04 Sk Techx Co., Ltd. Method for testing cloud streaming server, and apparatus and system therefor

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10313207B2 (en) 2014-03-10 2019-06-04 Sk Techx Co., Ltd. Method for testing cloud streaming server, and apparatus and system therefor
CN108667536A (en) * 2018-04-26 2018-10-16 国网冀北电力有限公司秦皇岛供电公司 A kind of test method and device for analog signal communication system

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