KR101197602B1 - Methods and apparatus for transmitting and receiving interactive service using ubiquitous server and ubiquitous terminal on digital cable broadcasting system - Google Patents

Abstract

The present invention relates to a method and apparatus for providing and receiving an interactive service in digital cable broadcasting.
According to an embodiment of the present invention, a method for transmitting an interactive service using a ubiquitous server in digital cable broadcasting may include browsing content provided by an interactive service, receiving data of the browsed content, and executing content with the received content data. And encoding the execution state of the executed content into image data, and transmitting the encoded image data to a receiving unit through an out of band channel.
In addition, in the digital cable broadcasting according to an embodiment of the present invention, a method for receiving an interactive service using a receiving unit includes, when the channel signal being received includes information on whether there is content provided by the interactive service associated with the channel. Filtering information, displaying an event trigger on the screen that executes the content related to the filtered information, receiving a content execution request through the displayed event trigger, and an image of the requested content to be executed. Receiving data via an out-of-band channel.

Description

METHODS AND APPARATUS FOR TRANSMITTING AND RECEIVING INTERACTIVE SERVICE USING UBIQUITOUS SERVER AND UBIQUITOUS TERMINAL ON DIGITAL CABLE BROADCASTING SYSTEM}

The present invention relates to a method and apparatus for providing digital cable broadcasting service. More particularly, the present invention relates to a method and apparatus for providing contents serviced in both directions in digital cable broadcasting.

With the development of broadcasting technology, the broadcasting system is changing from the existing analog broadcasting system to the digital broadcasting system. In addition, due to the convergence of communication technology and broadcasting technology, viewers can be provided with high quality programs and contents, and accordingly, demand for high quality programs and contents is increasing.

At this point, broadcasting is divided into cable broadcasting, satellite broadcasting and terrestrial broadcasting. Early cable broadcasting was a digital cable broadcasting through HFC (Hybrid Fiber Coaxial) network, which was superior to other media in terms of image quality and sound quality. In addition, cable HFC networks are the most widely installed and commercially available media among broadcast communication media due to the full facility investment in cable broadcasting networks and fast service settlement. Based on the broadband and economic feasibility of HFC networks, cable broadcasting is widely considered as the most efficient method in Korea, the US and China.

In particular, by using the HFC network of cable broadcasting, in addition to providing two-way digital broadcasting using OpenCable and DOCSIS return path (DSG), Data over Cable Service Interface Specification (DOCSIS) and Quality of Service (QoS) based on PacketCable The so-called Triple Play Service (TPS), which provides guaranteed Internet telephony services and DOCSIS-based high-speed Internet services, is possible.

Meanwhile, the cable broadcasting system uses an HFC network-based high-speed communication networking technology that allows a TV receiver to select a desired program or participate in a broadcast program instead of unilaterally receiving a broadcast program transmitted from a broadcast station. Content can be provided. The so-called two-way service of broadcasting has become possible.

However, in the era of broadcasting and telecommunications convergence, cable broadcasting has inevitably faced competition from IPTV carriers and web content platform providers. Large telecommunications operators and web content platform operators are increasing the share of broadcasting and telecommunications services through various combined products among other media by providing not only terrestrial contents but also internet-based contents. In the age of convergence of broadcasting and telecommunications, where the boundary between broadcasting and telecommunications disappears, digital cable broadcasting has come to the point of discovering new revenue models and solving the problem of poor content supply and demand.

However, web-based contents are not compatible with existing broadcasting system equipment. In addition, the web-based content provider has a problem in that it is unable to provide high quality content to the broadcast receiving unit due to the low hardware performance of the broadcast receiving unit.

In addition, there is a problem in a method of providing a bidirectional service through a general broadcast channel. In general, cable broadcast transmission systems have limitations on the available bandwidth of channel signals, and most of the bandwidth is already designated for a particular channel. Therefore, when transmitting a bidirectional service on an inband channel, simultaneous demand for a plurality of bidirectional services by a plurality of users of a cable HFC network causes excessive network resource contention, thereby saturating bandwidth. Problems such as a decrease in transmission speed and quality of service are caused.

The present invention is to solve the above problems, the technical problem to be achieved by the present invention is to provide and use the content for other media such as web-based content as a bidirectional service in the digital cable broadcasting system using the cable broadcasting infrastructure In this way, the competitiveness of digital cable broadcasting providers is enhanced and the demands of consumers are met.

In order to solve the above technical problem, in the digital cable broadcasting according to an embodiment of the present invention, a bidirectional service transmission method using a ubiquitous server, the step of browsing the content provided by the bidirectional service, receiving the data of the browsed content and Executing content with the received content data, encoding an execution state of the executed content into image data, and transmitting the encoded image data to a receiving unit through an out of band channel; Include.

In addition, in the digital cable broadcasting according to an embodiment of the present invention, a method for receiving an interactive service using a receiving unit includes, when the channel signal being received includes information on whether there is content provided by the interactive service associated with the channel. Filtering information, displaying an event trigger on the screen that executes the content related to the filtered information, receiving a content execution request through the displayed event trigger, and an image of the requested content to be executed. Receiving data via an out-of-band channel.

The effects of the bidirectional broadcast service providing system and method thereof according to the present invention are as follows.

First, by transmitting and receiving the content provided by the bidirectional service through the out of band (TS), the TS (Transport Stream) packetizing process for in-band channel transmission is eliminated. Therefore, when the bidirectional service is provided, the processing speed of the information is improved.

Second, since data is transmitted and received in an IP packet without TS packetizing, the number of data bits allocated to the TS header can be reduced. Therefore, the amount of data required to transmit the content can be reduced, thereby improving the transmission efficiency.

Third, by providing content used in different network protocols in the digital cable broadcasting service, it is possible to provide various contents to broadcasters and users without additional technical effort and economic loss.

1 is a diagram illustrating a bidirectional service providing system through an in-band channel in digital cable broadcasting according to an embodiment of the present invention.
2 is a diagram illustrating a detailed configuration of a system for providing a bidirectional service through an in-band channel in digital cable broadcasting according to an embodiment of the present invention.
3 is a diagram illustrating an interactive service providing system through an out-of-band channel in digital cable broadcasting according to another embodiment of the present invention.
4 is a diagram illustrating a detailed configuration of a bidirectional service providing system through an out-of-band channel in digital cable broadcasting according to an embodiment of the present invention.
5 is a flowchart illustrating a method of providing contents of an interactive service of an interactive service providing system in digital cable broadcasting according to an embodiment of the present invention.
6 is a flowchart illustrating a method of confirming the integrity of a bidirectional service content between a ubiquitous server and a receiving unit according to an embodiment of the present invention.
7 is a flowchart illustrating a bidirectional service providing method of a ubiquitous server in digital cable broadcasting according to an embodiment of the present invention.
8 is a flowchart illustrating a method for checking integrity of bidirectional service contents of a ubiquitous server according to an embodiment of the present invention.
9 is a flowchart illustrating a processing method of a ubiquitous server for overlapping or next request for the same bidirectional content of a receiving unit according to an embodiment of the present invention.
10 is a flowchart illustrating a method of receiving interactive service contents by a receiving unit in digital cable broadcasting according to an embodiment of the present invention.
FIG. 11 is a diagram illustrating an event trigger for executing an interactive service content associated with a broadcast channel according to an embodiment of the present invention on a broadcast screen.
12 is a flowchart illustrating a method of processing event trigger information in a ubiquitous server so that a user of a receiving unit may call an event included in interactive service content executed in the receiving unit according to an embodiment of the present invention.
FIG. 13 is a flowchart illustrating a method in which a receiving unit receives and focuses data including event trigger information according to an exemplary embodiment. Referring to FIG.
14 is a diagram illustrating an execution screen of interactive service content including an image area subjected to focus processing according to an exemplary embodiment.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings and the contents described in the accompanying drawings, but the present invention is not limited or limited to the embodiments.

As used herein, terms used in the present invention are selected from general terms that are widely used in the present invention while taking into account the functions of the present invention, but these may vary depending on the intention or custom of a person skilled in the art or the emergence of new technologies. In addition, in certain cases, there may be a term arbitrarily selected by the applicant, in which case the meaning thereof will be described in the description of the corresponding invention. Therefore, it is intended that the terminology used herein should be interpreted based on the meaning of the term rather than on the name of the term, and on the entire contents of the specification.

In digital cable broadcasting, the in-band channel has a transmission bandwidth of 54 to 680 MHz, and the out-of-band channel has a transmission bandwidth of 70 to 130 MHz for the top-down channel and 5 to 42 MHz for the bottom-up channel. The in-band channel is a channel through which video and audio signals, which are broadcast programs, are transmitted from a transmission system, and the out-of-band channel is used as a channel for transmitting additional information about content such as CA (Conditional Access) information and program information. In particular, the OpenCable standard applied in Korea applied DSG (DOCSIS Settop Gateway) using DOCSIS which provides internet service as out-of-band channel.

Meanwhile, in recent years, DOCSIS 3.0 has applied channel bonding technology to obtain a data communication bandwidth having a size proportional to the number of channels to be bonded. With this channel bonding technology, the internet service of the existing digital cable broadcasting system can be switched from the low speed internet service to the high speed internet service. In addition, the influence of interference due to the use of third party frequency bands is reduced. Accordingly, the possibility of using an out-of-band channel in an HFC network of cable broadcasting has increased.

1 is a diagram illustrating a bidirectional service providing system through an in-band channel in digital cable broadcasting according to an embodiment of the present invention.

The interactive service providing system of FIG. 1 includes a content source (1010), a head / end system (H / E; 1020), a PSIP / SI system (PSIP / SI; 1030), a ubiquitous server (UBS SVR; 1040), A ubiquitous network manager (UBS Manager) 1050, a QAM system (QAM) 1060, and a receiving unit (STB) 1070.

The content source 1010 may include a content provider (CP), a program provider (PP), or a content provider on the web.

The head / end system 1020 provides A / V and broadcast information.

The PSIP / SI system 1030 may play a role of generating and delivering broadcast organization information and system information (SI) information of a broadcast.

The ubiquitous server 1040 generates content in a form that can be used by the receiving unit 1070 from the content data provided from the content source 1010.

The ubiquitous network manager 1050 may perform overall management functions for usage management and efficient content transmission of the cable network. The ubiquitous network manager 1050 may be configured internally in the ubiquitous server 1040.

The QAM system 1060 transmits to the receiving unit 1070 which transmits a digital cable broadcast signal.

The receiving unit 1070 receives and executes the bidirectional content generated by the ubiquitous server 1040. In this case, the flexible browser 1080 may be provided in a hardware or software form in order to smoothly execute the interactive content in the receiving unit 1070.

2 is a diagram illustrating a detailed configuration of a system for providing a bidirectional service through an in-band channel in digital cable broadcasting according to an embodiment of the present invention.

As shown in FIG. 2, the interactive service providing system includes a content source 2010, a head / end system (H / E) 2020, a PSIP / SI system (PSIP / SI; 2030), and a ubiquitous server (UBS SVR) 2040. ), A ubiquitous network manager (UBS Manager) 2050, a QAM system (QAM) 2060, a receiving unit (STB) 2070, and a flexible browser 2080 that may be provided in the receiving unit 2070.

The content source 2010 is a content manager system (2013) that provides content in the form of CP / PP (2012), EPG Provider (EPG Provider) 2011, walled garden, and open content. It may include a subscriber management system (Subscriptor Management System; 2015) for confirming the subscriber's right to use the specific broadcast or content of the Internet content (Internet) 2014 and digital cable broadcasting.

The head / end system 2020 provides A / V and broadcast information.

The PSIP / SI system 2030 may play a role of generating and delivering broadcast organization information and system information (SI) information of a broadcast.

The ubiquitous server 2040 may include a browser module 2041, a session manager 2042, a cache manager 2043, an image encoder 2044, a compression unit 2045, It may include a scrambler 2046, a PSI generator 2047, a transport stream packetizer 2048, and a transmitter and a transmitter 2049.

The browser module 2041 browses the interactive service content requested by the receiving unit 2070 from the content providers inside and outside the ubiquitous server 2040 to receive data on the corresponding content, and the corresponding content in the ubiquitous server 2040. To play a role. The execution state of the executed content is imaged by the image encoder 2044 and encoded into image data.

In the detailed configuration of the ubiquitous server 2040 illustrated in FIG. 2, a PSI generation unit 2047 and a TS (Transport Stream) packetizer 2048 are provided for providing a bidirectional service through an in-band channel.

The PSI generation unit 2047 will be described below. In the ubiquitous server 2040, the information of the bidirectional content is generated in MPEG2-TS like the general A / V and transmitted to the receiving unit 2070, but the bidirectional content first received by the ubiquitous server 2040 is not in the form of TS. There is no PSI (Program Specific Information) for this content.

The TS packet of the broadcasting system is determined to be 188 bytes, and there are 4 bytes of header and 184 bytes of payload. The payload includes metadata that contains information necessary for demultiplexing and program representation of MPEG2-TS in a table format, which may be referred to herein as PSI.

Since the broadcast signal must comply with the broadcast standard, the bidirectional content received from the first ubiquitous server should be changed to a TS (Transport Stream) having PSI information or the like in order to be transmitted through the broadcast network. In this case, the PSI generation unit 2047 generates PSI information on content required in the process of changing the bidirectional content data to MPEG2-TS.

The PSI generator 2047 may play a role of generating information about a program required by a general broadcast system in addition to the PSI. For example, the PID (Packet Identifier) included in the TS packet header may be allocated by the ubiquitous network manager 2050, but may be generated by the PSI generator 2047.

That is, the PSI generator 2047 may generate and provide the corresponding information in cooperation with a system information generator (not shown) that generates various broadcast information such as PSIP / SI in a conventional data broadcasting system. .

The TS packetizer 2048 is a TS according to a broadcast standard to transmit data generated through the browser module 2041, the image encoder 2044, the compression unit 2045, and the scrambler 2046 through digital broadcasting. Perform packetization.

The TS of the bidirectional content generated according to the MPEG2-TS broadcast standard by the PSI generation unit 2047 and the TS packetizer 2048 is transmitted to the receiving unit 2070 through the QAM system 2060.

In FIG. 2, the ubiquitous network manager 2050 is illustrated outside the ubiquitous server 2040, but the ubiquitous network manager 2050 may be included in the ubiquitous server 2040 according to the load, processing performance, and the like of the system.

The bidirectional service providing system through the in-band channel shown in FIG. 2 does not use an out-of-band channel having a relatively limited frequency band, and transmits the bidirectional contents into TS packets through the in-band channel to the receiving unit. Through the broadcasting network of the, there is an effect that the existing broadcasting infrastructure can utilize the interactive content in the receiving unit. However, there is a limit in the frequency band of the in-band channel has a problem that can not accommodate all the requests of a plurality of digital cable broadcasting users. In addition, there is a problem that it is impossible to provide a large amount of advanced content.

A configuration not shown but illustrated in FIG. 2 will be described in detail below.

3 is a diagram illustrating an interactive service providing system through an out-of-band channel in digital cable broadcasting according to another embodiment of the present invention.

As shown in FIG. 3, the interactive service providing system according to the present invention includes a content source 3010, a head / end system (H / E) 3020, a PSI / SI system (PSI / SI; 3030), a ubiquitous server ( Ubiquitous Server / UBS SVR; 3040, Ubiquitous Network Manager / UBS MGR; 3050, Data Conversion Unit 3060, QAM System (QAM; 3070), Receiving Unit (STB; 3080), and Flexible Browser (Flexible) Browser 3090).

The content source 3010 may include web-based content, world garden content, CC, PP, and provide content that can be serviced in both directions to the ubiquitous server 3040.

The H / E system 3020 generates, compresses and multiplexes an A / V signal and various digital information in a digital cable broadcasting system, and transmits the digital cable broadcasting bandwidth.

The PSIP / SI system 3030 generates channel related information such as channel lineup and program programming information of the digital cable broadcasting system and transmits the channel related information to be processed by the receiving unit 3080.

The ubiquitous server 3040 serves to receive content provided by the interactive service from the content provider 3010 and transmit the content to the receiving unit 3080. At this time, the ubiquitous server 3040 can drive the first interactive content data received from the content provider 3010 at the performance of the platform of the receiving unit 3080 and the receiving unit 3080 through the flexible browser of the receiving unit 3080. Form and encode to suit the digital cable broadcasting environment and transmit to the receiving unit 3080 via the cable communication network. In addition, the ubiquitous server 3040 may deliver additional data such as personalization information for each receiving unit in association with other systems in a cable broadcasting system such as a SMS (Subscripter Management Sysyem), a CAS (Conditional Access System), and the like.

The ubiquitous network manager 3050 performs session management of the receiving unit 3080 for an efficient response of the ubiquitous server 3040. As an embodiment, the ubiquitous network manager 3050 may perform various controls for managing the usage of the cable network and for efficient content transmission.

In FIG. 3, the ubiquitous network manager 3050 is illustrated outside the ubiquitous server 3040, but the ubiquitous network manager 3050 may be included in the ubiquitous server 3040 according to the load, processing performance, and the like of the system.

The data conversion unit 3060 is responsible for information management functions for all IP multicast sessions, and defines a multicast control protocol according to the DOCSIS standard for transmitting IP multicast traffic using a bonding channel. According to an embodiment, the data converter 3060 may be a cable modem termination system (CMTS).

The QAM system 3070 is a device capable of managing to transmit MPEG streams such as video, audio, data, etc. in a digital cable broadcasting with a bandwidth set for each channel.

The flexible browser 3090 communicates with the ubiquitous server 3040 and the ubiquitous network manager 3050 as an application running in the receiving unit 3080 to request a bidirectional service and to receive a bidirectional service through an out-of-band channel. Do this. That is, the flexible browser 3090 is configured to receive the bidirectional content transmitted from the ubiquitous server 3040 and utilize the receiving unit 3080 regardless of the operating system or the platform of the receiving unit 3080.

4 is a diagram illustrating a detailed configuration of a bidirectional service providing system through an out-of-band channel in digital cable broadcasting according to an embodiment of the present invention.

The content source 4010 is a content manager system that provides content in the form of CP / PP, EPG provider, walled garden, Internet content in the form of open content, and digital cable. It may include a subscriber management system (Subscriptor Management System) for confirming the service use rights of the specific broadcast or content of the subscriber of the broadcast.

The ubiquitous server 4040 includes a browser module 4041, a session manager 4042, a cache manager 4043, an encoder 4043, a compression unit 4044, and a scrambler. It may include a sccrambler 4045 and a transmitter / receiver 4046.

The browser module 4041 performs processing for browsing the interactive service content in the server and transmitting the content to the receiving unit when the interactive service content is to be automatically called by a request of the receiving unit or a specific schedule. Receive content data to perform. The browser module 4041 may include a plug-in for driving various types of content such as a video, Flash, various applications, and various components such as Active X belonging to the content. Therefore, the interactive service content may be executed through the received content data.

In the processing order of the content data of the browser module 4041, the browser module 4041 may set the priority of the corresponding content in association with the cache manager 4043 in the case of World Garden-type content to set another priority for the interactive service. It can play a role of controlling to preprocess content.

The browser module 4041 may receive content data by browsing content in real time such as an open content type service such as Internet content. In addition, the browser module 4041 compares the previously received content data delivered to the receiving unit 4080 with the content data received by the re-request of the receiving unit 4080, and is subsequently executed to be changed to the received content data. If this exists, only the changed area can be transferred. By reducing the amount of data exchanged between the ubiquitous server 4040 and the receiving unit 4080 in this way, it is possible to effectively improve network usage efficiency.

When the session manager 4042 sends a bidirectional service content between the ubiquitous server 4040 and the receiving unit 4080 such as a request of the receiving unit 4080 or automatically generating the interactive service content according to a specific schedule, The session processing is performed for resource management of the ubiquitous server 4040. In addition, a process for resource return of the ubiquitous server 4040 may be performed in case an unexpected error occurs such as a failure of the receiving unit 4080 or a network failure. In addition, the ubiquitous server is configured in parallel to perform numerous broadcast and bidirectional service content processing. When a specific ubiquitous server 4040 fails, the ubiquitous server can communicate with other ubiquitous servers to perform a recovery function. Until the ubiquitous server is restored, another ubiquitous server 4040 may control the request of the receiving unit 4080 to process.

The cache manager 4043 performs a cache function to improve the response performance of the bidirectional service and the performance performance of the ubiquitous server 4040. The bidirectional service that is busy may be registered and stored in the cache manager so that the already registered bidirectional service content may not be encoded by the encoder 4044 and may be controlled to transmit the stored data to the receiving unit 4080. In addition, when the interactive service content is an open content, the Internet proxy function may be performed by the cache manager 4043.

The encoder 4044 encodes a transmission part for the content in a format that the receiving unit can process when the interactive service content is executed by the browser module 4041. The browser module 4041 may drive various kinds of content such as video, Flash, and various applications, and various components such as Active X. The encoder encodes the driven content and components together.

According to an embodiment of the encoding method of the encoder 4044, when the browser module 4041 executes the content with the content data of the received interactive service content, the screen in which the content is executed is a full image, and the area of the entire image is displayed. Area-specific encoding can be performed by separating. When encoding the image data encoded for each region, the encoder 4044 may encode the image data including information on coordinates located when the image data is displayed on the receiving unit 4080. The receiving unit 4080 may decode the encoded image data and display the image divided for each region at the correct position through the coordinate information included in the image data. In this encoding scheme, the reception unit 4080 may use interactive service content by receiving and processing the imaged content data from the ubiquitous server 4040 regardless of the performance of hardware or middleware of the reception unit 4080. In addition, this image encoding method eliminates the process of reproducing and reproducing contents already provided on the web or internet broadcasting for digital cable broadcasting, and saves the cost and time required to develop original contents for digital cable broadcasting. It works.

The pixel or size of the region divided in the encoding process may be changed flexibly with reference to information such as an event trigger display part included in the content and a part frequently changed in the content. In addition, the encoder 4044 encodes an area to be frequently changed, focus processing information on a part including an event trigger, and information on a part to be encoded and transmitted in real time into a text part of a ticker service. can do.

The transmission part for the content is the content necessary for the receiving unit 4080 to utilize the content, for example, the execution status of the content, the components included in the content, binary, text, and images included in the content. (image) or the like.

In the process of encoding the data of the interactive service content, the encoding may be performed according to the protocol of the ubiquitous system. The protocol of the ubiquitous system may include a method in which the content data imaged and encoded in the receiving unit should be processed. For example, the image data encoded in the coordinates of the position to be displayed on the screen of the receiving unit, the focusing information to be recognized in the receiving unit 4080, the text portion that is changed in real time, such as ticker (Ticker) There can be various conventions such as information about how to handle common components and libraries that can be used together for uniformity in services, such as World Garden Services.

The compression unit 4045 compresses the imaged interactive service content in order to reduce network usage and transmission time.

The scrambler 4046 may encrypt and process only the specific receiving unit 4080 when the interactive service provided through the ubiquitous system is paid content or data processed in the content is information requiring security such as personal information and payment information. Process it. The data to be encrypted may be the entire content, or may be part of the content such as text data or image data included in the content. In one embodiment, a bundle of interactive service contents, such as a game, may be configured as a paid service by tying individual interactive service contents such as Go, Tetris, and Batgi, or each individual service may be configured as a paid service. Alternatively, an authority to use open content may be assigned and paid. In this case, the scrambler 4045 encrypts the corresponding bidirectional service content in the process of being processed by the ubiquitous server 4040 for transmission to the receiving unit 4080. The scrambler 4046 may process rights for the corresponding interactive service in association with information of a subscriber management system of a conventional digital cable broadcasting system and a conditional access system (CAS).

The transmitter / receiver 4047 transmits encoded image data of the bidirectional service content generated by the encoder 4044 and the compressor 4045 to the receiving unit 4080.

The data conversion unit 4060 performs unicasting or multicasting that converts the image data into IP data packets and the like and transmits the data through IP socket communication. In the case of multicasting, a session filter (not shown) may be provided in the receiving unit 4080 to transmit encoded image data to various receiving units.

Image data converted into data packets may be transmitted through an out-of-band channel. In the conventional DOCSIS 1.0 and 2.0 standards, transmission and reception of data through an out-of-band channel is not suitable for real-time transmission and reception of bidirectional service contents in view of its speed due to a narrow bandwidth. However, the recent channel bonding technology of DOCSIS 3.0 enables significant bandwidth expansion of out-of-band channels, resulting in increased data rates and throughput.

The ubiquitous network manager 4050 may include a server session monitor 4051 and a database 4052.

When the server session monitor 4051 requests the bidirectional service from the receiving unit 4080, when the receiving unit 4080 performs bidirectional communication with the receiving unit 4080 requesting the bidirectional service and the ubiquitous server 4040, the server session monitor 4041 indicates that a session has occurred in the server. Detect. The ubiquitous server 4040 may be configured to be connected in parallel. The server session monitor 4041 performs resource allocation of the ubiquitous server 4040 which processes a request of the receiving unit 4080, and performs a specific ubiquitous server 4040. In the event of a failure, the ubiquitous server 4040 updates the information so that the session for the request of the receiving unit 4080 can be processed.

The database 4052 manages information about sessions per server, management information such as service IDs of available contents such as world garden services and designated open contents, and the like.

In FIG. 4, the ubiquitous network manager 4050 is shown outside the ubiquitous server 4040, but the ubiquitous network manager 4050 may be included in the ubiquitous server 4040 according to the load, processing performance, and the like of the system.

The receiving unit 4080 may include an inband processor 4081 that processes a signal received through inband and performs overall control of the receiving unit, and an out-of-band channel processor that processes a signal received through an out-of-band channel ( An out of band processor 4083 and a transceiver 4022 that transmit and receive various signals.

The receiving unit 4080 may further include a flexible browser 4090.

The flexible browser 4090 may be in the form of an unbound application stored in the receiving unit 4080 in a digital cable broadcasting environment. The flexible browser 4090 is an application executed when the receiving unit 4080 is driven. It can play a role of executing and managing two-way and one-way services.

The flexible browser 4090 includes a parser 4091, a filter 4092, a content manager 4093, a protocol manager 4094, a focus handler 4095, and a plug-in. -in; 4096, an image manager 4097, and a memory 4098.

The parser 4091 parses the service contents and combines them for each material. The parser 4091 may combine various pieces of information included in the image encoder of the ubiquitous server. According to an embodiment, information on the type of interactive service content, coordinate information of a position at which imaged and encoded content data is to be displayed on a screen of the receiving unit 4080, focus processing information to be recognized by the receiving unit 4080, and a ticker (Ticker) Information about text parts that change in real time, such as the World Garden service, and common component and library handling information that can be used together for uniformity in the service can be combined.

The filter 4092 filters the corresponding information when there is bidirectional service content execution information in the stream of the receiving channel, and performs event processing for service execution according to the bidirectional service content type. The interactive service content execution information includes information such as service type, service type, and service ID for identifying whether only bidirectional processing or unidirectional processing is possible. Such bidirectional service execution information may be provided in a system for organizing content, and in the above system, the TS may be processed to include the bidirectional service execution information at a specific location in a transport stream (TS).

The content manager 4093 manages a life cycle of the received interactive service content. Life cycle management is different from the life cycle controlled and managed by the monitor application, which is a middleware or a system application, and manages the life cycle of the image and metadata-based interactive service contents delivered from the ubiquitous server 4040. In addition, when the conventional unbound application, the bound application, and the like are activated, the bidirectional service content is processed so that the overlapping and display of the application service is not performed. In one embodiment, if the received interactive service content is automatically executed, the screen automatically outputs the received interactive service content, and if the received interactive service content is in the standby state, the received interactive service content is in the standby state until there is an external input of the viewer. In addition, the request of the receiving unit 4080 for the start and end of the bidirectional service content is transmitted to the ubiquitous network manager 4050. At the same time, processing for resources such as resource allocation of the receiving unit 4080 is also performed. That is, the content management unit 4093 serves to assist the resource of the limited receiving unit 4080 to be used efficiently.

The protocol manager 4094 processes the image and data generated by the ubiquitous server 4040 according to the protocol. In the protocol of the ubiquitous system, text that is changed in real time such as coordinate information of a location where image data encoded and encoded is to be displayed on a screen of a receiving unit, focus processing information to be recognized by the receiving unit 4080, and a ticker service. There may be various protocols such as information on parts, how to handle common components and libraries that can be used together for uniformity in services, such as World Garden Service, and the receiving unit 4080 is interpreted by interpreting the information according to these protocols. Use the content according to the information.

In one embodiment, since the image area in which the ticker is displayed should be changed in real time, the image area in which the ticker is displayed is changed in real time by recognizing information controlling to receive new image data for this area in real time. While the image of the remaining area can be controlled to maintain the conventional image. In addition, the coordinate information included in the encoded image data may be decoded and interpreted according to a protocol in the decoding process so that the divided image region may be displayed at the correct position in the receiving unit 4080.

The focus processing unit 4095 displays a service on a TV screen and performs useful focus processing on the service screen due to the digital broadcasting characteristic that the viewer uses it. In more detail, an input process for focus movement is immediately generated to process the service so that there is no inconvenience in using a service.

As an example, when an event trigger is included in a specific region of the execution state of the interactive service content, the corresponding interactive service content execution state is received by the receiving unit 4080 by interpreting the event trigger inclusion information included in the image data of the encoded specific region. , The image area including the event trigger can be processed to focus on a user input such as a direction key of the remote controller. In the focused image area, an event can be called by input of an execution key of the user. Alternatively, when viewing an digital broadcast program, an event trigger for executing an interactive service content related to the corresponding program needs to be displayed and receiving a focus shift request between the event triggers when two or more event triggers exist. Can be processed.

Unlike a PC-based service controlled by a mouse and a keyboard, a general broadcast service can be controlled only by using a direction key, a number button, and a specific function key of a remote controller. Since the navigation of the remote control is the up, down, left, and right arrow keys, freely navigable content such as open content can be focused only on the part where the input focus is possible, by assigning focus ID, focus input rank, and coordinate position. As the left / right is selected, the priority is determined and the focus is moved. The focusing information is encoded according to the protocol at the time of encoding of the ubiquitous server 4040. In addition, the focus responds to each input and functions to update the information that is not displayed on the screen in real time. In this case, the focus processor 4095 may perform a stable navigation by storing a large amount of information that can be stored in association with the image manager 4097.

The plug-in 4096 may be provided with various multimedia information due to the characteristics of an open content service such as the Internet, and various image players, text readers, Internet video players, Flash, Active X, and Pay Gate for executing such multimedia information. The payment module may be included, and may be embedded in the flexible browser 4090. It can be applied to all services and applications that can be executed on a PC in addition to Internet contents. When the execution module for the multimedia information exists in the flexible browser 4090, the multimedia information is directly received by the ubiquitous server 4040 without receiving an image encoding process for the multimedia information, and receiving the data for the multimedia information directly. 4080). The receiving unit 4080 may receive and store the corresponding data, and the plug-in 4096 may execute the corresponding multimedia information through the stored data.

What kind of execution module the plug-in 4096 will include may depend on the capabilities of the hardware of the receiving unit 4080. The interactive service content that can be executed by the plug-in 4096 does not need an encoding process in the ubiquitous server 4040 and a separate decoding process in the receiving unit 4080, thereby saving resources of the ubiquitous system. .

The image manager 4097 manages common modules such as frequently used images, libraries, etc. in the image manager 4097 and immediately reads them from the storage 4098 of the receiving unit 4080 without newly downloading them. In the image management unit 4097, in the case of an open content service such as a web page, a history storage function is provided to store information on a previously viewed page, and when the viewer calls a previous screen, the storage unit 4098 is not received again from the server. Control to utilize the data. In this case, whether the common module is frequently used may be decoded and recognized by the protocol manager 4094 based on information included in the encoding of the ubiquitous server 4040, and may be determined by measuring an image use frequency of the image manager 4097. It may be.

That is, when there is a re-request of the receiving unit 4080 for the same interactive service content as the role of the image manager 4097, the ubiquitous server 4040 generates the image data for the already generated content data again and receives the receiving unit ( There is an effect of reducing the resource waste of the reception unit 4080 and the ubiquitous server 4040 and the decrease in transmission efficiency between the reception unit 4080 and the ubiquitous server 4040 generated when transmitting to the 4080.

The storage unit 4098 is a space in which a specific area of the memory of the receiving unit 4080 is designated as an area available to the flexible browser 4090. The storage unit 4098 stores an image and various usage information, and stores the image manager 4097. It can be loaded and used whenever it is needed. Resource return can be done in a timely manner for efficient use of resources.

5 is a flowchart illustrating a method of providing contents of an interactive service of an interactive service providing system in digital cable broadcasting according to an embodiment of the present invention.

As shown in FIG. 5, when the user moves to a broadcast channel including the interactive service content, the flexible browser of the receiving unit filters execution information of the interactive service content in the stream of the channel currently being received (S5010). If the filtering result includes the bidirectional service content execution information, the bidirectional service type may be checked and an event trigger for executing the bidirectional service content may be displayed.

When the user recognizes an event trigger and selects an external input for executing a bidirectional service, the flexible browser transmits service confirmation request information to the ubiquitous network manager through an out-of-band channel (return pass) (S5020). When performing the service check request, the flexible browser checks the transport stream ID (TSID), channel allocation frequency, program number, service ID, uniform resource locator (URL) of the channel being viewed, and the MAC address of the receiving unit. Can be sent together. URL information is required when requesting a URL of Internet content without a service ID in the case of open content.

By performing the service confirmation request, first, the receiving unit can secure a secure network bandwidth for receiving the bidirectional service, and second, the ubiquitous server end can redistribute network resources. Third, the effect of verifying the integrity of the interactive service content can be expected. In this case, the integrity verification refers to a process of examining whether or not the interactive service content can be serviced to the receiving unit normally under conditions such as a request for permission to use the content and an error in the content data.

In the database of the ubiquitous network manager, session information and bidirectional service content management information of the ubiquitous server exist. When the ubiquitous network manager is configured outside the ubiquitous server, the ubiquitous server may include a ubiquitous server database in the ubiquitous server separately from the database of the ubiquitous network manager. In this case, the contents of the database of the ubiquitous network manager and the contents of the ubiquitous server database may be synchronized.

The ubiquitous network manager transmits network information to the ubiquitous server, and the ubiquitous network manager requests the ubiquitous server to check the integrity of the corresponding bidirectional service content (S5030). When requesting integrity check, information such as service ID, Mac address and URL can be delivered together. From the standpoint of the flexible browser, the flow is asynchronous in response.

The ubiquitous server performs a procedure such as checking the cache existence, checking the integrity, and checking the access authority of the corresponding content of the receiving unit with respect to the requested service (S5040). If the normal bidirectional service information can be sent to the receiving unit, the normal acknowledgment code is transmitted to the receiving unit. Ubiquitous network manager delivers the result of the service confirmation request to the flexible browser. The information on the bandwidth to which the service content is to be transmitted, the information of the ubiquitous server generating the service, the ubiquitous server IP and the URL information may be included in the result of the service confirmation request.

If the bidirectional service receives a signal that the normal service is available, the flexible browser requests the corresponding bidirectional service (S5050). The ubiquitous server may transmit the bidirectional service contents received in the network delivery step through the CMTS through the out-of-band channel.

The flexible browser receives the interactive service content, parses the service content, and combines the information generated during the image encoding process of the ubiquitous server for each material (S5060).

The receiving unit drives and displays the interactive service content with reference to the combined information (S5070).

6 is a flowchart illustrating a method of confirming the integrity of a bidirectional service content between a ubiquitous server and a receiving unit according to an embodiment of the present invention.

As shown in FIG. 6, the receiving unit transmits an integrity check request signal for bidirectional service content to be used as a ubiquitous server (S6010). In this case, the integrity check request of the receiving unit may be directly transmitted to the ubiquitous server, but if there is a necessity of network management, the request is transferred to the ubiquitous network manager, and the request is performed after the ubiquitous network manager performs necessary tasks for network management. Can be passed to a ubiquitous server.

The ubiquitous server checks whether normal service is available for the bidirectional service content that has received the integrity check request (S6020).

If normal service is possible, it is checked whether the encoded image data exists in the ubiquitous server (S6030). If the encoded image data exists, the encoded image data of the bidirectional service content is transmitted to the requesting unit that requested the content. In the case of frequently used open content, the ubiquitous server may store image data pre-encoded using a cache policy.

If the encoded image data does not exist, the ubiquitous server transmits a response to the integrity check request to the receiving unit (S6040).

If the corresponding bidirectional service is normally available as a result of the response (S6050), the ubiquitous server performs encoding on the content, and transmits the encoded image data to the receiving unit (S6060). In this case, if management of the network is required, the response to the integrity check request may be transmitted to the receiving unit through the ubiquitous network manager.

Successful response results can be classified into two types: normal confirmation of the content and authority confirmation result of viewing the content.

As a result of the integrity check request, when normal service is not available, an error code indicating that service is not available is transmitted to the receiving unit (S6070), and the procedure is terminated.

The error code may be, for example, 200: unavailable due to viewing authority, 300: expired service period, 500: internal server error, 404: service not found, etc. .

7 is a flowchart illustrating a bidirectional service providing method of a ubiquitous server in digital cable broadcasting according to an embodiment of the present invention.

As shown in FIG. 7, when there is a request from a receiving unit or interactive service content to be executed automatically in connection with a broadcast program, the ubiquitous server browses the content from content providers to retrieve data of the content. It receives (S7010).

In response to the received content data, the ubiquitous server executes the corresponding bidirectional service content in itself (S7020). Execution of content includes not only the execution of the content on the display screen as if the consumer uses the content, but also the execution status information of the content internally, although it cannot be checked externally on the screen or the like. Contains the state being read from the ubiquitous server.

When the interactive service content is executed, the screen corresponding to the execution state of the executed content is divided into specific areas (S7030). The size or pixel of a specific region may vary depending on the type of content, the existence of a region that is frequently changed, and whether or not an event trigger is included in the image for each region.

When generating image data divided by regions, the receiving unit requests only the image of the frequently changed part of the bidirectional service content execution process from the receiving unit to the ubiquitous server, or generates image data of the changed part from the ubiquitous server and transmits it to the receiving unit. As a result, it is possible to expect the effect of obtaining efficiency of system resource usage and data transmission.

On the other hand, in an embodiment, when encoding, the fixed region may encode and transmit an entire background screen called a background when the service forms a static screen configuration. Background Iframes are pre-encoded and ready for transmission. The advantage of using Iframe is that hardware decoding is displayed and can reduce CPU processing load.

Also, as an example, when the resolution of 720x480 is encoded, 800 KB of screen information is obtained. When converted to Iframe, it can be reduced to 50KB, which can compress the transmission contents.

In addition, even if a delay or an error occurs in the transmission and reception process, since the image data for each area is received, there is an effect of preventing the occurrence of blanking of the entire screen or the entire screen being cut off.

In addition, the event information is included in the image data for each region so that the event can be executed through an input for selecting the corresponding image region so that various interactive service contents can be accommodated in the digital cable broadcasting and the convenience of the consumer can be achieved. have.

The partial image of the execution state of the interactive service content divided by the specific area generates coordinate information to be located on the screen of the receiving unit (S7040).

The ubiquitous server encodes the generated coordinate information into data for transmission by including the generated coordinate information in the image information corresponding to the divided region (S7050). In the encoding process, information necessary for the ubiquitous system protocol may be included in the encoded data. For example, focusing information that should be recognized by the receiving unit, recognition information for text parts that change in real time, such as a ticker service, and common components and libraries that can be used together for uniformity in services, such as the World Garden service. Various protocols may exist, such as the handling information.

Encoding of bidirectional service content data for transmission may also encode audio information in addition to image information of an execution state of bidirectional service content. In this case, there may be a method for encoding to separate the audio signal so as to encode only the audio signal and to include information for synchronization with the image signal in the audio signal or the image signal. Alternatively, if the audio data is included in the execution of the region in the image data divided and encoded for each region, the audio signal may be included and encoded as data for transmission. If it is necessary to transmit data including an audio signal, the receiving unit may include an application that can reproduce the audio signal.

The ubiquitous server transmits the data generated through the encoding process to the receiving unit (S7060). During transmission, data encoded in the form of a data packet may be converted according to a communication standard in an out-of-band channel. CMTS may be an example of a device required for conversion.

When the ubiquitous server browses the bidirectional service contents and generates the data for receiving the contents data and transmitting the contents data to the receiving unit, the ubiquitous server may have different priorities in the processing according to the type of the bidirectional services contents. As an example, when content data for content A and B is received and the received data is analyzed, when content B has a higher priority than content A, data of content B is first encoded and transmitted. Examples of high-priority content include content in the form of a world garden, content directly related to revenue generation of a content provider or broadcaster, or content for request or benefit of a content consumer of a receiving unit.

8 is a flowchart illustrating a method for checking integrity of bidirectional service contents of a ubiquitous server according to an embodiment of the present invention.

As shown in FIG. 8, the ubiquitous server receives identification information of the receiving unit that has requested the bidirectional service content (S8010). The identification information of the receiving unit is the ID of the receiving unit, and is information capable of recognizing the receiving unit that requested the bidirectional service content from the ubiquitous server.

The ubiquitous server browses the bidirectional service content requested by the receiving unit and checks whether the corresponding content can be normally serviced to the receiving unit (S8020). Whether the normal service is available includes whether the receiving unit identified through the identification information of the receiving unit requesting the corresponding content is authorized to access the corresponding content, and the content provider side normally provides the interactive service content requested by the receiving unit. It can be determined by information such as whether there is.

The ubiquitous server checks whether the two-way service content requested by the receiving unit is normal service (S8030), and when the normal service is available, according to the process shown in FIG. 7, processing for transmitting the content to the receiving unit and processing by the receiving unit. The transferred data is performed (S8040).

If the bidirectional service content requested by the receiving unit cannot be normally serviced, an error code on why it cannot be normally serviced is transmitted to the receiving unit and the procedure is terminated (S8050).

By confirming in advance whether the contents provided by the interactive service can be normally serviced by the ubiquitous server, it is possible to prevent resource allocation of the system for the processing of contents that are not normally provided from the content provider or contents that do not have access to the receiving unit, and are received. By preventing unnecessary data transmission between the unit and the ubiquitous server, the transmission efficiency is improved.

9 is a flowchart illustrating a processing method of a ubiquitous server for overlapping or next request for the same bidirectional content of a receiving unit according to an embodiment of the present invention.

As shown in FIG. 9, the content A is received by browsing the content A, which should be automatically executed in connection with a request of the receiving unit or a broadcast program (S9010).

The ubiquitous server browses whether there is already received content data for the received content A (S9020). The received content data may be stored in a memory inside or outside the ubiquitous server for a predetermined time according to a predetermined condition.

If there is no previously received content data for content A (S9030), the ubiquitous server executes processing for content A according to the process shown in FIG. 7 (S9040, S9050, S9060), and previously received content for content A. If there is content data, the received content data is compared with the data of the received content A to determine whether there is a changed area in the data of the received content A (S9070).

If there is a changed area in the data of the received content A, the ubiquitous server executes a part including the changed area of the content A (S9080), encodes only that part (S9090), and transmits the part to the receiving unit (S9100). In this case, the encoded data for the changed part may include information on which part of the content A has changed, and through this information, the receiving unit may replace the data of the changed part with newly received data.

If there is no changed area in the data of the received content A, the ubiquitous server transmits the encoded data of the previously received content A to the receiving unit (S9110).

Through the above process, if there is a duplicate or next request for the same bidirectional content in the receiving unit, the procedure of encoding and transmitting the same content data can be avoided, thereby improving the efficiency of resource usage of the system and the difference between the receiving unit and the ubiquitous server. This has the effect of improving transmission efficiency.

10 is a flowchart illustrating a method of receiving interactive service contents by a receiving unit in digital cable broadcasting according to an embodiment of the present invention.

As shown in FIG. 10, the receiving unit receives a specific broadcast channel (S10010).

In operation S10020, the broadcast signal is filtered for information indicating that there is interactive service content related to the channel being received by the receiving unit. The filtered information includes information for executing the interactive service content. If there is no information of the interactive service content related to the channel being received, the receiving unit ends the procedure for receiving the interactive service content.

On the contrary, when there is information on the interactive service content related to the channel being received, the receiving unit displays an event trigger for executing the related interactive service content on the viewing screen of the broadcast channel (S10030).

If the viewer does not input the content execution request through the displayed event trigger, the receiving unit ends the procedure for receiving the bidirectional service content (S10040).

On the contrary, when there is a request from the viewer, the receiving unit transmits a normal service availability confirmation request for the corresponding content (S10050).

If the corresponding content can be normally serviced by the receiving unit, the receiving unit receives the imaged and encoded data of the corresponding content, decodes it, and interprets coordinate information, focus information, etc. included in the received data according to a protocol. The content is executed in the receiving unit (S10060).

Data received by the receiving unit may be transmitted via an out-of-band channel. By receiving interactive service contents related to a broadcast program through an out-of-band channel, various kinds of interactive service contents may be provided without being interfered with the broadcast frequency band.

FIG. 11 is a diagram illustrating an event trigger for executing an interactive service content associated with a broadcast channel according to an embodiment of the present invention on a broadcast screen.

As illustrated in FIG. 11, an event trigger 11000 for calling a web page of a broadcast program may be displayed on a viewing screen of the broadcast program. The viewer may receive and execute the interactive service content through the event trigger 11000 even during broadcasting.

There may be two or more event triggers. In this case, the receiving unit processes the viewer to selectively execute desired interactive service content while moving the focus between the event triggers according to the viewer's focus movement input.

12 is a flowchart illustrating a method of processing event trigger information in a ubiquitous server so that a user of a receiving unit may call an event included in interactive service content executed in the receiving unit according to an embodiment of the present invention.

As shown in FIG. 12, the ubiquitous server divides execution state screens of the interactive service contents by regions (S12010). The ubiquitous server generates coordinate information of the position where the separated image should be displayed in the receiving unit (S12020). The ubiquitous server checks whether an event trigger for calling other content is included in the image of the divided region (S12030), and if the event trigger is included, reads information for event invocation (S12040). The ubiquitous server encodes the read event call information together with the coordinate information to generate data (S12050).

FIG. 13 is a flowchart illustrating a method in which a receiving unit receives and focuses data including event trigger information according to an exemplary embodiment. Referring to FIG.

As shown in FIG. 13, the receiving unit receives image data divided and encoded for each region (S13010), decodes the data, and determines whether the corresponding region includes event trigger information (S13020). If the corresponding area includes event trigger information, the receiving unit recognizes coordinates of the corresponding area (S13030). The receiving unit identifies and processes an image area located at the recognized coordinates as a focusable image (S13040). The receiving unit displays the decoded image at a position according to the coordinate information, and the receiving unit receives a focus shift command for selecting an event trigger included in the executing bidirectional service content (S13050). The receiving unit moves the focus between the image areas subjected to the focus processing according to the focus shift command (S13060). When the user stops the focus on a specific area and inputs a command for calling an event included in the corresponding area, the receiving unit recognizes event trigger information of the corresponding area and executes a related event (S13070).

14 is a diagram illustrating an execution screen of interactive service content including an image area subjected to focus processing according to an exemplary embodiment.

14 shows the web page on the Internet to which the illustrated interactive service content belongs to the open content.

As shown in FIG. 14, the rectangular areas 1410 to 14090 of broken lines are focused on a portion including an event trigger. The dashed line may not be displayed in the running state (14010, 14020, 14030, 14040, 14050, 14060, 14080, 14090). However, it is possible to display that the focus moves between the areas represented by the broken lines according to the user's focus movement input. The member introduction tab 14070 is currently in focus. When the user enters an execution command with focus on the member introduction tab 1140, a web page (not shown) introducing the member is called.

As described in detail above, according to the exemplary embodiments of the present invention, the bidirectional service providing system through the out-of-band channel can be expected to have some advantageous effects compared to the system for providing bidirectional service through the in-band channel. First, when an out-of-band channel is used compared to the in-band channel, which is already allocated to the frequency of a specific broadcast channel, it is possible to expect the effect that the information can be transmitted and received without interference to the third-party frequency band. Second, in the case of transmitting the bidirectional service through the in-band channel, a configuration and a process of converting the encoded image data into TS data in order to transmit the encoded image data to the broadcast transmission system, in addition to the process of image and encoding the content data, are required. On the other hand, since data transmission through the out-of-band channel does not transmit a signal to the TS, TS packetizing is not required, thereby saving resources for TS packetizing and time required for packetizing. . For example, the PSI generation unit 2047 and the TS packetizer 2048 in the configuration of the ubiquitous server of the bidirectional service providing system through the in-band channel in the digital cable broadcasting according to an embodiment of the present invention shown in FIG. The configuration of is unnecessary. Third, the 188-byte TS packet is configured to include 4 bytes of header information according to the broadcast standard. Therefore, even if the information contained in the header is not particularly necessary, TS packetizing should be included so that the 4-byte header is included. Therefore, when using an out-of-band channel for transmitting and receiving data packets other than the TS, it is possible to save 4 bytes of transmission data for every 188 bytes of transmission data compared to transmission over the in-band channel. Therefore, the transmission efficiency can be improved.

While the invention has been shown and described with reference to certain preferred embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. This is possible. Therefore, the scope of the present invention should not be limited by the described embodiments, but should be determined by the equivalents of the appended claims, as well as the appended claims.

Claims (14)

Browsing content provided by an interactive service;
Receiving data of the browsed content and executing content with the received content data;
Encoding an execution state of the executed content into image data; And
Transmitting the encoded image data to a receiving unit through an out of band channel,
And transmitting the encoded image data into a data packet and transmitting the data to the receiving unit. The method of claim 1,
Encoding into the image data,
Dividing the image frame in the execution state of the contents by region; And
Encoding coordinate information into image data by adding coordinate information on a screen where the divided area image is to be located;
Interactive service transmission method using a ubiquitous server in a digital cable broadcast including a. delete The method of claim 1,
Browsing the content provided by the interactive service
Receiving identification information of the receiving unit to recognize the receiving unit that has requested the content;
Checking whether a receiving unit according to the received identification information can receive the contents normally;
If the reception unit cannot receive the contents normally, transmitting an error code and ending the procedure;
The bidirectional service transmission method using a ubiquitous server in a digital cable broadcast further comprising. The method of claim 1,
Receiving data of the browsed content and executing content with the received content data,
Comparing the received content data with the previously received content data when there is previously received content data for the browsed content; And
If there is a changed area in the received content data as a result of the comparison, processing to execute only a part of the content including the changed area;
The bidirectional service transmission method using a ubiquitous server in a digital cable broadcast further comprising. If the channel signal being received includes information on whether there is content provided to the interactive service related to the channel, filtering the information;
Displaying an event trigger on a screen to execute content related to the filtered information;
Receiving a content execution request through the displayed event trigger;
Receiving image data of the content requested to be executed through an out-of-band channel;
Decoding image data received via the out-of-band channel; And
Displaying an image at a position according to coordinate information included in the decoded image data;
A bidirectional service receiving method using a ubiquitous terminal in a digital cable broadcast including a. delete A browser module for browsing content provided by an interactive service, receiving data of the browsed content, and executing content with the received content data;
An encoder for encoding an execution state of the executed content into image data; And
And a transceiver configured to transmit the encoded image data to a receiving unit through an out of band channel.
And a transmitting / receiving unit converts the encoded image data into a data packet and transmits the ubiquitous server. The method of claim 8,
The encoder comprising:
A ubiquitous server for transmitting an interactive service in a digital cable broadcasting, characterized in that the image frame of the execution state of the content is divided into regions, and the coordinate information on the screen where the image of the divided region is to be added is encoded into image data. . delete The method of claim 8,
The browser module,
A ubiquitous server for transmitting a two-way service in a digital cable broadcast, by checking whether the browsed content can be normally serviced and if the browsed content cannot be normally serviced, transmitting an error code and ending the procedure. The method of claim 8,
The browser module,
Receiving data of the browsed content and executing content with the received content data, and if there is already received content data for the browsed content, the received content data and the previously received content data Comparing and comparing the received content data with the changed content, and executing only the part of the content including the changed area, wherein the ubiquitous server transmits the bidirectional service in the digital cable broadcasting. A filter for filtering information on the bidirectional service when the received channel signal includes information on the bidirectional service associated with the channel;
An inband processor configured to control to display, on a screen, an event trigger for executing the interactive service content related to the filtered information;
A transceiving unit configured to receive data about the bidirectional service contents through an out-of-band channel when an execution command of the bidirectional service contents is input through the event trigger; And
An out of band processor for decoding the data received through the transceiver and controlling to display an image divided for each area included in the decoded data at a position according to coordinate information; Including;
And the data for the interactive service content includes image data encoded in an execution state in which the content is executed. The ubiquitous terminal receiving the interactive service in digital cable broadcasting. delete

Images