Electronics and Telecommunications Research Institute

Kt Corporation

Soon Choul Kim

Young Ho Jeong

Jin Woo Hong

Bum Suk Choi

Jeoung Lak Ha

Soo In Lee

Jung Hak Kim

O Hyung Kwon

Eun Jung Kwon

Seung Chul Kim

Heejeong Kim

Han Seung Koo

Dong Won Kim

Won Geun Ryu

Jae-Young Lee

Hyun Woo Lee

Nam Ho Hur

Heung Mook Kim

Sung Ik Park

Dong Joon Choi

Joon Young Jung

Namho Hur

Hyoung Soo Lim

Hyun-Jeong Yim

Hyun Jeong Yim

Hye Ju Oh

Byung Jun Bae

Seoung Chul Kim

Jae Hong Ryu

Disclosed are an apparatus and method for providing an offloading service. A method of providing an offloading service according to an example embodiment includes streaming, to a user terminal including a cellular network receiver and a broadcast network receiver, media content data through a cellular network, transmitting, to the user terminal, an offloading service providing signal for activating the broadcast network receiver of the user terminal through the cellular network, transmitting, to the user terminal, a broadcast signal including connection information of a broadcast network to which the user terminal is to be connected so as to receive the media content data, through the cellular network, and broadcasting the media content data through the broadcast network.

Apparatus and method for providing offloading service

Disclosed is a method of transmitting broadcasting data and apparatus for the same. According to an embodiment of the present disclosure, the method of transmitting broadcasting data includes: determining at least one IP-based data packet provided in different lengths received from a higher layer; generating a media transport packet having a fixed length by converting the at least one IP-based data packet; and generating broadcasting data by modulating the generated media transport packet on the basis of a broadcasting data modulation scheme and transmitting the broadcasting data.

Method of transmitting IP-based broadcasting data over cable broadcasting network and apparatus for same

The present invention relates to a method and an apparatus for transmitting broadcasting contents which repeatedly transmits segment based broadcasting contents to easily develop next generation broadcasting service and system so that it looks as if the contents are continuously reproduced even when contents having a limited capacity are repeatedly reproduced and a test environment which is the same as an actual broadcasting environment is provided.

Method and apparatus for repeatedly transmitting segment based broadcasting contents

A broadcaster apparatus, content operator apparatus, and receiving terminal for augmented broadcasting service, and an augmented broadcasting service method. A service user may select a predetermined content operator among content operators that provide augmented content in an environment for providing an augmented broadcasting service according to an exemplary embodiment.

Broadcaster apparatus, content operator apparatus, and receiving terminal for augmented broadcasting service, and augmented broadcasting service method

An audience selection type augmented broadcasting service providing apparatus and method is provided. The audience selection type augmented broadcasting service providing apparatus may include an augmented broadcast producing server to process a production process of augmented contents to provide the augmented broadcasting service, for broadcast contents, a broadcasting server to multiplex and transmit the broadcast contents and metadata for the augmented broadcasting service, and an augmented content receiving terminal to process the augmented contents based on the metadata for the augmented broadcasting service, while playing the broadcast contents.

Audience selection type augmented broadcasting service providing apparatus and method

A mutual authentication method in a Downloadable Conditional Access System (DCAS) is provided. The mutual authentication method may receive authentication-related information about authentication between an authentication unit and a security module (SM) from a Trusted Authority (TA), generate an authentication session key using the authentication-related information, transmit the authentication session key by the authentication unit to the SM through a Cable Modem Termination System (CMTS), and control a Conditional Access System (CAS) software to be downloaded to the SM from the authentication unit, when the authentication is completed by the authentication session key.

Mutual authentication apparatus and method in downloadable conditional access system

The system for providing targeting augmented contents includes: an augmented metadata generation apparatus that generates augmented metadata designating specific space and time of broadcast contents as an augmented area; a broadcast content providing apparatus that transmits the augmented metadata to a first broadcast terminal apparatus and transmits the augmented metadata and the broadcast contents to a second broadcast terminal apparatus; a first broadcast terminal apparatus that transmits augmented contents displayed in the augmented area in which the augmented metadata are designated to the augmented content providing apparatus; an augmented content providing apparatus that transmits the augmented contents to a second broadcast terminal apparatus; and a second broadcast terminal apparatus that receives the broadcast contents and the augmented metadata from the broadcast content providing apparatus and receives the augmented contents from the augmented content providing apparatus based on the augmented metadata.

Method of providing augmented contents and apparatus for performing the same, method of registering augmented contents and apparatus for performing the same, system for providing targeting augmented contents

The system includes a metadata generation apparatus for generating metadata to designate a specific space and time in and on which a speech balloon or a music book will be displayed on broadcasting content, a multiplexing broadcasting server for multiplexing the metadata received from the metadata generation apparatus and the broadcasting content and sending the multiplexed result to a reception apparatus, an augmented content providing apparatus for sending the speech balloon suitable for speech included in the broadcasting content or the music book suitable for music included in the broadcasting content to the reception apparatus, and the reception apparatus for displaying the broadcasting content and displaying the augmented content in a specific space and time of the broadcasting content based on the metadata.

Method and apparatus for receiving augmented broadcasting content, method and apparatus for providing augmented content, and system for providing augmented content

Disclosed is a media content reception method for providing augmenting media contents using graphic objects, including: receiving metadata including information representing each event of any one of broadcast contents or moving picture contents, and any one of the broadcast contents or the moving picture contents and graphic object related information associated with events, the events including at least one of a specific scene, a specific situation, and a specific phenomenon of any one of the broadcast contents or the moving picture contents; analyzing the received metadata; designating the graphic objects to correspond to each event within any one of the broadcast contents or the moving picture contents based on the analyzed metadata; and displaying the designated graphic objects to meet each event at the time of playing any one of the broadcast contents or the moving picture contents.

Media content transmission method and apparatus, and reception method and apparatus for providing augmenting media content using graphic object

Provided is a random backoff apparatus and method for receiving augmented content that may prevent a delay or a down of a server caused by a plurality of receiving terminals accessing a server simultaneously, when a digital broadcasting system provides broadcast-based bidirectional broadcasting services over a communication network. That is, a technology for distributing receiving terminals accessing a server to receive augmented content, or accessing a home page of a corresponding program, based on metadata transferred from the digital broadcasting system to a broadcasting network. In a bidirectional digital method, a number of requests for access to the home page or the augmented content related to the program may be received from receiving terminals at one time. Accordingly, there is a desire for a method of preventing collision caused when a plurality of stations simultaneously access a single wireless channel.

Random backoff apparatus and method for receiving augmented content

An augmented broadcasting stream transmission device and method and an augmented broadcasting service providing device and method capable of ensuring that augmented broadcasting metadata arrive at a receive terminal in a time more rapid as compared to a corresponding video frame by a predetermined time are provided.

Augmented broadcasting stream transmission device and method, and augmented broadcasting service providing device and method

Disclosed is a mutual authentication method and apparatus in a CAS including a headend system and DCAS host. In particular, example embodiments relate to a mutual authentication method and apparatus in DCAS, wherein the mutual authentication is performed between an authentication server of the headend system and an SM of a DCAS host, and then CAS software is downloaded to the SM. According to the example embodiments, there is provided a mutual authentication protocol between the authentication server of the headend and the SM of the DCAS host in a cable network, and also provided a mutual authentication method and apparatus in the DCAS where a substantial authentication based on a hardware, such as a smart card or a cable card, is not needed.

Method and apparatus for mutual authentication in downloadable conditional access system

Provided are a Downloadable Conditional Access System (DCAS), and a channel setting method and a message format for a 2-way communication between a terminal and an authentication server in the DCAS. The DCAS may include: a verification unit to verify an electronic signature and an integrity with respect to a message received from the authentication server; an extraction unit to extract network access information of the authentication server from the message in which the electronic signature and the integrity are verified; and a channel setting unit to set a communication channel with the authentication server based on the extracted network access information.

Downloadable conditional access system, channel setting method and message structure for 2-way communication between terminal and authentication server in the downloadable conditional access system

A method of operating a headend system for a downloadable conditional access service, the method including: receiving, by an Authentication Proxy (AP) server, basic authentication information from a Downloadable Conditional Access System (DCAS) host, the basic authentication information being required to authenticate the DCAS host; transmitting, by the AP server, the basic authentication information to an external trusted authority device which authenticates the DCAS host; generating, by the AP server, a session key for encrypting/decrypting a secure micro client using a session key sharing factor; obtaining, by the AP server, download-related information of the secure micro client from a DCAS Provisioning Server (DPS); and commanding, by the AP server, an Integrated Personalization System (IPS) server to download the secure micro client to the DCAS host based on the download-related information, the secure micro client being encrypted by the session key.

Headend system for downloadable conditional access service and method of operating the same

A Downloadable Conditional Access System (DCAS) headend system and method for processing an error of Secure Micro (SM) Client Software are provided to prevent further transmission of SM Client Software where an error occurred, and to prevent unnecessary traffic due to repeat reinstallation of SM Client Software between an Authentication Proxy (AP) server and a terminal, by changing policy information regarding a transmission of SM Client Software associated with error information, when a number of terminals that transmit the error information exceeds a reference value as a result of analyzing result information regarding a reception and an installation of the SM Client Software received from a terminal corresponding to a DCAS headend system.

Growing community of inventors

Daejeon, South Korea

Soon Choul Kim