Electronics and Telecommunications Research Institute

Byungjun Bae

Namho Hur

Hyoungsoo Lim

Joungil Yun

Yun Jeong Song

Chieteuk Ahn

Hyun-Jeong Yim

Jinhwan Lee

Hun Hee Lee

Kyu Tae Yang

Woo-Suk Kim

Soo In Lee

Won-Seok Lee

Jong Soo Lim

Young Su Kim

Myung-Sun Baek

Young-Kwon Hahm

Sang-Jung Ra

Kwang-Yong Kim

Yong Seong Cho

Joon-Young Choi

Youngkwon Hahm

Hyoung Kyu Song

Joonyoung Choi

A method and an apparatus for estimating synchronization of a broadcast signal in a time domain using a synchronization estimation signal through steps of: performing a correlation operation using a correlation window on a plurality of synchronization estimation signals separated to a plurality of paths and outputting a plurality of correlated signals; delaying the plurality of correlated signals to output a plurality of delayed signals; and estimating the synchronization using the plurality of delayed signals are provided.

Apparatus and method for estimating synchronization of broadcast signal in time domain

A device for transmitting a media service in a hybrid network, which is a combination of a broadcasting network and a communication network, includes a streaming server, a streaming client, a multiplexer, and a transmitter. The streaming server generates media segments including media data and a metadata file including temporal order information and downloading and reproduction information of the media segments corresponding to a plurality of profiles. The streaming client selects a profile according to a transmission bit ratio appropriate for a broadcasting resource allocation state, requests a media segment with quality that is suitable for the broadcasting resource allocation state from the streaming server, and downloads the same. The multiplexer multiplexes part of information of the metadata file on the profile selected from among the media segment and the metadata file of the plurality of profiles to generate a baseband frame. The transmitter converts the baseband frame into a broadcasting signal and transmits the same through a broadcasting network.

Device and method for transmitting and receiving media service in hybrid network

Disclosed is a method and device for transmitting media data in a digital broadcasting system for allocating media data to a superframe, and transmitting a superframe in which a time length of media data corresponds to a time length of the superframe.

Method and device for allocating media data to a superframe and transmitting a superframe in which a time length of media data corresponds to a time length of the superframe in a digital broadcasting system

A receiving terminal in a hybrid network receives a video stream through a broadcasting network. The receiving terminal receives a high speed video stream streamed at a high speed for a defined first period from a first time when switching from the broadcasting network to a communication network depending on a receiving state of the broadcasting network is determined, receives a live video stream streamed in a live form from any one time of the first period, and generates a continuous video stream using the video stream received through the broadcasting network, the high speed video stream, and the live video stream.

Apparatus and method for receiving video service in hybrid network

An apparatus of transmitting data in a multi-carrier system includes: a plurality of pulse-shaping filters for performing pulse shaping of incoming data symbols during a set pulse-shaping period; and a plurality of frequency converters convert signals that are pulse-shaped by the plurality of pulse-shaping filters into signals with frequency bands for a plurality of subcarriers.

Apparatus and method of transmitting data in multi-carrier system

A broadcasting signal transmitting device transmits a broadcasting signal including a base layer signal and an enhancement layer signal as well as an additional layer signal relating to the broadcasting signal to a broadcasting signal receiving device. The broadcasting signal receiving device selectively provides the enhancement layer signal and the additional layer signal to the user according to the user's service level. Accordingly, various services are differently provided to the user according to the user level.

Device and method for transmitting and receiving broadcasting signal

A digital broadcast protocol conversion system including: a PSIP/PSI extractor for demultiplexing a transport stream of an ATSC broadcast standard to extract PSIP/PSI data; an SI/PSI extractor for demultiplexing a transport stream of a DVB broadcast standard to extract SI/PSI data; a protocol converter for converting the PSIP/PSI data to SI'/PSI&#x2032; data corresponding to a broadcast protocol of the DVB broadcast standard or converting the SI/PSI data to PSIP&#x2032;/PSI&#x2032; data corresponding to a broadcast protocol of the ATSC broadcast standard; and a multiplexer for multiplexing the SI&#x2032;/PSI&#x2032; data and the transport stream having the PSIP/PSI data extracted therefrom, or multiplexing the PSIP&#x2032;/PSI&#x2032; data and the transport stream having the PSIP/PSI data extracted therefrom, thereby converting the broadcast protocol between different broadcast standards.

System and method for digital broadcast protocol conversion

A null packet insertion apparatus including a null packet remover for removing an irregularly inserted null packet from an externally received video/audio transport stream; a null packet bit rate calculator for calculating a bit rate of the removed null packet; a GUI for determining the transmission period of a periodic null packet to be newly inserted, based on the calculated bit rate, by an external user; a periodic null packet generator; a multiplexer for regularly inserting the periodic null packet preferentially and inserting the video/audio transport stream with the irregular null packet removed, and performing multiplexing; a non-periodic null packet generator; and a PCR corrector.

Apparatus and method for inserting null packet in digital broadcasting transmission system

Growing community of inventors

Daejeon, South Korea

Byungjun Bae