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1.发明授权公开(公告)号：US10333643B2
公开(公告)日：2019-06-25
申请号：US14959189
申请日：2015-12-04
Inventor： Joon Young Jung , Jae Ho Lee , Dong Joon Choi , Nam Ho Hur
Abstract: An apparatus and a method for converting an upstream radio frequency (RF) signal to a digital signal and transmitting the digital signal via an Internet protocol (IP) packet based on an optical network in a cable broadcasting network is provided. The apparatus for transmitting an upstream RF signal includes a detector configured to detect an upstream RF signal, and a transmitter configured to digitize the detected upstream RF signal and transmit the digitized RF signal to a headend via an IP packet.
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2.发明授权Method and apparatus for compensating for variable symbol timing using cyclic prefix in non-synchronized OFDM system 有权用于在非同步OFDM系统中使用循环前缀补偿可变符号定时的方法和装置公开(公告)号：US09154293B2
公开(公告)日：2015-10-06
申请号：US14097440
申请日：2013-12-05
Inventor： Jae Ho Lee , Yang Su Kim , Sang Jung Ra , Han Seung Koo , Dong Joon Choi , Nam Ho Hur
CPC classification number: H04L7/0079 , H04L27/2656 , H04L27/2663 , H04L27/2678
Abstract: Disclosed are a method and apparatus for estimating symbol timing in a non-synchronized OFDM system. The present invention includes synchronizing a frame of a received signal, estimating the symbol timing of each symbol of the frame based on the synchronization, compensating for the symbol timing using a phase difference attributable to a Symbol Timing Offset (STO), variably changing within a Cyclic Prefix (CP) interval due to the frequency offset of a sampling clock and thermal noise, and performing channel equalization using a preamble based on output including corrected phase rotation.
Abstract translation: 公开了一种在非同步OFDM系统中估计符号定时的方法和装置。 本发明包括使接收信号的帧同步，基于同步来估计帧的每个符号的符号定时，使用归因于符号定时偏移（STO）的相位差来补偿符号定时，该相位差可在一个 由于采样时钟和热噪声的频率偏移导致的循环前缀（CP）间隔，并且使用基于包括校正相位旋转的输出的前导码来执行信道均衡。
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公开(公告)号：US11997366B2
公开(公告)日：2024-05-28
申请号：US17895973
申请日：2022-08-25
Inventor： Eun Hee Hyun , Kwan Woong Ryu , Je Won Lee , Joon Young Jung , Dong Joon Choi
IPC: H04N21/6373 , H04N21/218 , H04N21/238 , H04N21/239 , H04N21/24 , H04N21/437
CPC classification number: H04N21/6373 , H04N21/21805 , H04N21/23805 , H04N21/2393 , H04N21/2402 , H04N21/437
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.
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公开(公告)号：US11882481B2
公开(公告)日：2024-01-23
申请号：US17718938
申请日：2022-04-12
Inventor： Soon Choul Kim , Sung Ik Park , Jae-young Lee , Hyun-Jeong Yim , Namho Hur , Dong Joon Choi
IPC: H04W28/08 , H04N21/438 , H04N21/61 , H04W84/04
CPC classification number: H04W28/0967 , H04N21/438 , H04N21/6131 , H04W84/042
Abstract: 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.
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公开(公告)号：US09271017B2
公开(公告)日：2016-02-23
申请号：US14303715
申请日：2014-06-13
Inventor： Joon Young Jung , Dong Joon Choi , Namho Hur
IPC: H04N7/16 , H04N21/2362 , H04N21/236 , H04N21/2365 , H04N21/235 , H04N21/84 , H04N21/434 , H04N21/81
CPC classification number: H04N21/2362 , H04N21/2353 , H04N21/23614 , H04N21/2365 , H04N21/4343 , H04N21/4345 , H04N21/4347 , H04N21/816 , H04N21/84
Abstract: A broadcasting transmitting apparatus configures one broadcasting channel as at least two video streams, generates a program map table (PMT) representing configuration information of a stream included within the broadcasting channel, sets a program type provided through the corresponding broadcasting channel within the PMT, multiplexes the at least two video streams and signaling information, and transmits the multiplexed two video streams and signaling information through a broadcasting network.
Abstract translation: 广播发送装置将一个广播信道配置为至少两个视频流，生成表示广播信道中包含的流的配置信息的节目映射表（PMT），设置通过PMT内的相应广播信道提供的节目类型，复用 至少两个视频流和信令信息，并且通过广播网络发送多路复用的两个视频流和信令信息。
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Patent Agency Ranking
6.发明授权Method for transmitting data using variable guard interval and apparatus thereof 有权使用可变保护间隔发送数据的方法及其装置公开(公告)号：US09059886B1
公开(公告)日：2015-06-16
申请号：US14308997
申请日：2014-06-19
Inventor： Jae-Ho Lee , Sang-Jung Ra , Dong Joon Choi , Namho Hur
IPC: H04L27/26
CPC classification number: H04L27/2613 , H04L27/2607 , H04L27/2627 , H04L27/2646
Abstract: In an orthogonal frequency division multiplexing (OFDM) wireless communication system, when path delay information is received from a reception apparatus through a return path after data transmission, a length of a cyclic prefix included in a transmitted signal is adjusted on the basis of a delay value included in the path delay information.
Abstract translation: 在正交频分复用（OFDM）无线通信系统中，当在数据发送之后通过返回路径从接收装置接收到路径延迟信息时，根据延迟来调整包含在发送信号中的循环前缀的长度 值包含在路径延迟信息中。
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7.发明授权Method and apparatus for inserting broadcast program by detecting available channel over hybrid fiber coax network or optical cable network 有权通过混合光纤同轴网络或光缆网络检测可用信道来插入广播节目的方法和装置公开(公告)号：US09027071B2
公开(公告)日：2015-05-05
申请号：US13868674
申请日：2013-04-23
Inventor： Yang Su Kim , Han Seung Koo , Jae Ho Lee , Sang Jung Ra , Dong Joon Choi , Nam Ho Hur
IPC: H04N21/2385 , H04N21/2383 , H04N21/61 , H04H20/06 , H04H60/41
CPC classification number: H04N21/2385 , H04H20/06 , H04H60/41 , H04N21/2383 , H04N21/6118
Abstract: An apparatus for combining a broadcasting channel may include a channel detector to detect a vacant Radio Frequency (RF) broadcasting channel used by a photoelectric converter that converts a first broadcast program as an optical signal to a first RF signal, a broadcast receiving interface to receive at least one second broadcast program, a broadcast modulator to generate a second RF signal by modulating the second broadcast program using the vacant RF broadcasting channel, and a channel combiner to combine a broadcasting channel used for the first RF signal and the vacant RF broadcasting channel.
Abstract translation: 用于组合广播信道的装置可以包括：信道检测器，用于检测由光电转换器使用的空闲射频（RF）广播信道，其将作为光信号的第一广播节目转换为第一RF信号;广播接收接口，用于接收 至少一个第二广播节目，通过使用空闲RF广播频道调制第二广播节目来产生第二RF信号的广播调制器，以及组合用于第一RF信号的广播频道和空闲RF广播频道 。
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公开(公告)号：US12177515B2
公开(公告)日：2024-12-24
申请号：US17940848
申请日：2022-09-08
Inventor： Joon Young Jung , Je Won Lee , Dong Joon Choi
IPC: H04N21/4385 , H04N21/43
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.
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公开(公告)号：US10700895B2
公开(公告)日：2020-06-30
申请号：US15864733
申请日：2018-01-08
Inventor： Jae Hwui Bae , Jin Hyuk Song , Je Won Lee , Joon Young Jung , Dong Joon Choi , Nam Ho Hur
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.
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10.发明授权公开(公告)号：US09832065B2
公开(公告)日：2017-11-28
申请号：US15151768
申请日：2016-05-11
Inventor： Joon Young Jung , Je Won Lee , Dong Joon Choi , Nam Ho Hur
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.
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