公开(公告)号：US20160337081A1

公开(公告)日：2016-11-17

申请号：US15151768

申请日：2016-05-11

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Joon Young JUNG ,  Je Won LEE ,  Dong Joon CHOI ,  Nam Ho HUR

IPC: H04L1/00 ,  H04L27/38

CPC classification number: H04L27/38 ,  H04L1/0057

Abstract: Disclosed are an apparatus and a method for soft-decision demodulating in non-square quadrature amplitude modulation. The apparatus includes: a signal receiving unit receiving a quadrature amplitude modulation (QAM) modulated signal at an m modulation degree at a transmitting side; a soft-decision bit calculating unit determining a soft-decision bit value by calculating log likelihood ratios (LLRs) for m bits of the received QAM modulated signal; and a signal decoding unit restoring the received QAM modulated signal based on the determined soft-decision bit value, in which the soft-decision bit calculating unit defines a log likelihood ratio calculation equation by approximating soft-decision boundary points of constellation points for m bits of non-square QAM having odd bits, respectively.

Abstract translation: 公开了一种在非正交正交幅度调制中进行软判决解调的装置和方法。 该装置包括：信号接收单元，其在发送侧以m个调制度接收正交幅度调制（QAM）调制信号; 软判决比特计算单元，通过计算所接收的QAM调制信号的m比特的对数似然比（LLR）来确定软判决比特值; 以及信号解码单元，基于所确定的软判决比特值来恢复接收到的QAM调制信号，其中软判决比特计算单元通过近似m位的星座点的软判决边界点来定义对数似然比计算方程 分别具有奇数位的非正方形QAM。

公开(公告)号：US20230144522A1

公开(公告)日：2023-05-11

申请号：US17940848

申请日：2022-09-08

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Joon Young JUNG ,  Je Won LEE ,  Dong Joon CHOI

IPC: H04N21/4385 ,  H04N21/43

CPC classification number: H04N21/4385 ,  H04N21/4307

Abstract: According to an embodiment of the present disclosure, there is provided a method and apparatus for transmitting/receiving a digital broadcast. The method for transmitting a digital broadcast, the method comprising: configuring AV data; configuring broadcast data; configuring application signaling information (ASI) by considering at least one of the AV data and the broadcast data or combination thereof; configuring an MPEG-based transport stream by multiplexing the AV data, the broadcast data and the ASI; and transmitting the MPEG-based transport stream, wherein the ASI includes data for driving an application executed by a broadcast receiver.

公开(公告)号：US20230199267A1

公开(公告)日：2023-06-22

申请号：US17895973

申请日：2022-08-25

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Eun Hee HYUN ,  Kwan Woong RYU ,  Je Won LEE ,  Joon Young JUNG ,  Dong Joon CHOI

IPC: H04N21/6373 ,  H04N21/238 ,  H04N21/24 ,  H04N21/218 ,  H04N21/437 ,  H04N21/239

CPC classification number: H04N21/6373 ,  H04N21/437 ,  H04N21/2393 ,  H04N21/2402 ,  H04N21/21805 ,  H04N21/23805

Abstract: An adaptive multi-view streaming processing method and apparatus for a multi-view stream is disclosed. Specifically, disclosed herein is a method and apparatus for adaptively processing or transmitting adaptive streaming by reflecting network states and changes in transmission environments in a multi-view streaming service environment where several or more multiple videos are simultaneously transmitted at an arbitrary moment. An adaptive streaming processing method for a multi-view stream may comprise selecting and downloading an i-th segment of a main view stream with a first quality level, inferring a size of an i-th segment of downloadable neighboring view streams based on a download time and transfer rate of the i-th segment of the main view stream, and selecting a second quality level corresponding to the inferred size of the i-th segment of the neighboring view streams and downloading the i-th segment of the neighboring view streams based on the selected second quality level.

公开(公告)号：US20180287823A1

公开(公告)日：2018-10-04

申请号：US15864733

申请日：2018-01-08

Applicant: Electronics and Telecommunications Research Institute

Inventor： Jae Hwui BAE ,  Jin Hyuk SONG ,  Je Won LEE ,  Joon Young JUNG ,  Dong Joon CHOI ,  Nam Ho HUR

IPC: H04L25/02 ,  H04L27/26

CPC classification number: H04L25/022 ,  H04L27/266 ,  H04L27/2662 ,  H04L27/2666 ,  H04L27/2678 ,  H04L27/2695

Abstract: Disclosed are a roll-off period detection method, a symbol starting point detection method, a fractional frequency offset estimating method, and an OFDM downstream system using the same. A method of detecting a roll-off period in an OFDM downstream system according to an embodiment of the present disclosure may include: generating a temporary roll-off period by applying a windowing function to a signal having a preset length; and detecting a roll-off period based on any one of a cross correlation and a sum of differences between a detection target signal included in a range of two OFDM symbol signals based on a detection starting point, and the temporary roll-off period.