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公开(公告)号：KR101028956B1
公开(公告)日：2011-04-12
申请号：KR1020090070337
申请日：2009-07-31
Applicant: 포항공과대학교 산학협력단
IPC: H04N7/173
CPC classification number: H04L65/605 , H04L65/4076 , H04L65/80 , H04N21/234327 , H04N21/6125 , H04N21/631 , H04N21/64792
Abstract: 본 발명은 모바일 IPTV 시스템에 있어서, IPTV 스트림을 위한 데이터를 기본 계층과 향상 계층으로 인코딩하여 출력하는 IPTV 헤드엔드와, 상기 IPTV 헤드엔드로부터 IPTV 스트림을 수신하고 미리 결정된 변조 기법과 부호화율의 조합에 따라 IPTV 스트림의 향상 계층을 부분적으로 절삭하여 전송 IPTV 스트림을 출력하는 기지국과, 상기 기지국으로부터 상기 전송 IPTV 스트림을 수신하는 이동 단말을 포함한다. 이러한 본 발명에 따라 망 내의 사용자 분포의 특성을 고려하여 IPTV 서비스 제공시 가장 효율적으로 사용자들의 QoS를 만족 시켜 줄 수 있다.
IPTV, H.264/AVC SVC코딩-
公开(公告)号：KR1020110012564A
公开(公告)日：2011-02-09
申请号：KR1020090070337
申请日：2009-07-31
Applicant: 포항공과대학교 산학협력단
IPC: H04N7/173
CPC classification number: H04L65/605 , H04L65/4076 , H04L65/80 , H04N21/234327 , H04N21/6125 , H04N21/631 , H04N21/64792
Abstract: PURPOSE: A method for offering a mobile IPTV(Internet Protocol TV) service and a system thereof in order to provide a video service of high quality to users are provided to efficiently transmit the encoded video through H.264 MGS technique on WiMAX. CONSTITUTION: An IPTV headend(100) encodes data to a base layer for IPTV stream. A BS(Base Station)(220) receives the IPTV stream from the IPTV headend. The BS partially cuts the enhancement layer of the IPTV stream according to the combination of the coding rate. The BS outputs the transmission IPTV stream. An SS(Subscriber Station)(300) receives the transmission IPTV stream from the BS.
Abstract translation: 目的：提供一种用于提供移动IPTV（因特网协议电视）服务及其系统以便向用户提供高质量的视频服务的方法，以通过WiMAX上的H.264 MGS技术有效地发送编码视频。 规定：IPTV前端（100）将数据编码到IPTV流的基础层。 BS（基站）（220）从IPTV头端接收IPTV流。 根据编码率的组合，BS部分地切断IPTV流的增强层。 BS输出传输IPTV流。 SS（订户站）（300）从BS接收传输IPTV流。
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公开(公告)号：KR101849245B1
公开(公告)日：2018-04-16
申请号：KR1020140179595
申请日：2014-12-12
Applicant: 삼성전자주식회사 , 포항공과대학교 산학협력단
Abstract: 서버가단말기에게 3차원그래픽콘텐츠를제공하는방법은, 상기서버와상기단말기간에형성된제1 무선네트워크의상태및 제2 무선네트워크의상태를결정하는단계; 상기 3차원그래픽콘텐츠내의객체의동적정보를획득하는단계; 상기동적정보에기초하여결정되는상기 3차원그래픽콘텐츠의그래픽품질및 이미지화질에기초하여, 상기 3차원그래픽콘텐츠를분할하고, 상기분할된 3차원그래픽콘텐츠의일부들을상기제1 무선네트워크및 상기제2 무선네트워크에할당하는단계; 및상기분할된 3차원그래픽콘텐츠의일부들을상기제1 무선네트워크및 상기제2 무선네트워크를통하여상기단말기로전송하는단계를포함할수 있다.
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公开(公告)号：KR101592727B1
公开(公告)日：2016-02-12
申请号：KR1020140085103
申请日：2014-07-08
Applicant: 포항공과대학교 산학협력단
IPC: G06F15/16
CPC classification number: G06F11/1076 , G06F3/0619 , G06F3/064 , G06F3/067 , G06F11/1048 , H03M13/154 , H03M13/3761
Abstract: 클라우드스토리지시스템과 P2P 스토리지시스템을결합한하이브리드스토리지시스템에관한것이다. 하이브리드스토리지시스템은, 클라우드스토리지의서버와 P2P 스토리지의피어에대한대역폭을측정하는노드관리부와, 서버와피어에분산될데이터의단위를결정하는패킷분배벡터와서버와피어에저장될데이터에대한인코딩을결정하는파운틴코딩율을산출하는변수제어부와, 서버와피어에저장될데이터에파운틴코딩율에따른파운틴인코딩을수행하는인코딩부와, 측정된대역폭및 패킷분배벡터에기반하여서버와피어에데이터가전송되는데소요되는시간인전송시간을산출하고, 전송시간에대한정보를변수제어부에전달하는스케쥴러를포함한다. 따라서, 사용자데이터의프라이버시문제를해결하고데이터복구율을향상시킴과동시에최소한의전송시간으로데이터를저장할수 있다.
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公开(公告)号：KR1020150045346A
公开(公告)日：2015-04-28
申请号：KR1020130125216
申请日：2013-10-18
Applicant: 삼성전자주식회사 , 포항공과대학교 산학협력단
IPC: H04L12/801 , H04L1/00
CPC classification number: H04L45/123 , H03M13/3761 , H04L1/0057 , H04L45/124 , H04L45/24
Abstract: 본발명은네트워크환경에서사용자의설정이필요없이동적으로최적의매개변수를선택함으로써안정적인영상스트리밍이가능하도록한다. 본발명은 PCI에따라서, 일반패킷을어떠한경로로분배할지를결정(스케줄링)하고, 비용함수를최소화하는심볼크기및 소스심볼의개수를결정한다.
Abstract translation: 本发明涉及动态选择最佳参数，以便在网络环境中稳定地流传输图像而无需用户设置。 本发明基于PCI确定（调度）要分发通用分组的路径，并且确定最小化成本函数的符号大小和源符号的数量。
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Patent Agency Ranking
公开(公告)号：KR101231265B1
公开(公告)日：2013-02-07
申请号：KR1020110111750
申请日：2011-10-31
Applicant: 포항공과대학교 산학협력단
IPC: H04N21/234 , H04H20/65 , H04L12/56
CPC classification number: H04N21/23418 , H04N21/23605
Abstract: PURPOSE: A method of providing a streaming service in a heterogeneous wireless network and a system are provided to offer a high-quality streaming service in a way where the encoding bit rate of a video stream is maximized. CONSTITUTION: A system providing streaming service chooses at least two or more paths as virtual paths among paths which are provided by a heterogeneous wireless network. The system detects the property of the two or more virtual paths(S100). Based on the property, a system calculates the maximum bit rate of a video stream encoding for each virtual path. The system chooses paths with the highest bit rate among the paths as a path for delivering a packet(S200). [Reference numerals] (AA) Start; (BB) Are current paths set ?; (CC) No; (DD) Yes; (EE) End; (S110) Transmitting test data through virtual paths; (S120) Calculating the property of the virtual paths; (S210) Calculating the maximum number of packets; (S220) Calculating the maximum code rate of fountain encoding; (S230) Calculating the maximum bit rate of image stream encoding; (S241) Re-setting at least two current paths; (S242) Setting at least two current paths; (S300) Providing packets through at least to current paths
Abstract translation: 目的：提供在异构无线网络和系统中提供流服务的方法，以使视频流的编码比特率最大化的方式提供高质量的流服务。 构成：提供流服务的系统至少选择两条或多条路径作为由异构无线网络提供的路径之间的虚拟路径。 系统检测两个或多个虚拟路径的属性（S100）。 基于该属性，系统计算每个虚拟路径的视频流编码的最大比特率。 系统选择路径中具有最高比特率的路径作为递送分组的路径（S200）。 （附图标记）（AA）开始; （BB）当前路径是否设置？ （CC）否; （DD）是; （EE）结束; （S110）通过虚拟路径发送测试数据; （S120）计算虚拟路径的属性; （S210）计算最大包数; （S220）计算喷泉编码的最大码率; （S230）计算图像流编码的最大比特率; （S241）重新设置至少两个电流路径; （S242）设置至少两条电流路径; （S300）通过至少到目前的路径提供数据包
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公开(公告)号：KR1020110041222A
公开(公告)日：2011-04-21
申请号：KR1020090098293
申请日：2009-10-15
Applicant: 엘지전자 주식회사 , 포항공과대학교 산학협력단
IPC: H04L1/00 , H04L12/801
CPC classification number: H04L1/0057
Abstract: PURPOSE: A data transmission method is provided to improve the probability of a decoding in a packetized data transmission environment. CONSTITUTION: A source block is symbolized into a plurality of source symbols of a predetermined size(S510). The source symbols is encoded by applying a fountain code(S520). A plurality of encode symbols is packetized in a predetermined numbers(S530). The packetized encode symbols are transmitted to a receiving part(S540).
Abstract translation: 目的：提供一种数据传输方法，以提高分组化数据传输环境中解码的概率。 构成：源块被符号化为预定尺寸的多个源符号（S510）。 源符号通过应用喷泉代码进行编码（S520）。 多个编码符号以预定数字分组（S530）。 分组化的编码符号被发送到接收部分（S540）。
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公开(公告)号：KR1020100060435A
公开(公告)日：2010-06-07
申请号：KR1020080119024
申请日：2008-11-27
Applicant: 포항공과대학교 산학협력단
IPC: H04L12/58 , H04L27/00 , H04B7/24 , H04N21/2383
CPC classification number: H04L65/80 , H04L1/0009 , H04L43/0823 , H04N19/19 , H04N21/2383 , H04W84/18
Abstract: PURPOSE: A method for transmitting multimedia data over a mobile ad hoc network is provided to select a physical transmission mode adaptively in a MAC layer in consideration of channel quality information and a packet loss rate, thereby satisfying service quality for data sensitive for the packet loss rate and delay time. CONSTITUTION: In an application layer of a transmission node, an H.264 encoder encodes video data. Controlling a Lagrange multiplier is performed every data unit based on a packet loss rate. In a transmission layer, a packet for the video data is generated. In a network layer, the packet is routed through an AODV(Ad hoc On-demand Distance Vector). In a MAC layer, a physical transmission mode is selected in consideration of channel quality of a physical layer. In the physical layer, the video data is transmitted.
Abstract translation: 目的：提供一种通过移动自组织网络传输多媒体数据的方法，以考虑到信道质量信息和分组丢失率来自适应地选择MAC层中的物理传输模式，从而满足对数据包丢失敏感的数据的服务质量 速率和延迟时间。 构成：在传输节点的应用层中，H.264编码器对视频数据进行编码。 基于分组丢失率，每个数据单元执行控制拉格朗日乘数。 在传输层中，生成用于视频数据的分组。 在网络层中，数据包通过AODV（Ad hoc按需距离向量）路由。 在MAC层中，考虑到物理层的信道质量来选择物理传输模式。 在物理层中，传输视频数据。
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公开(公告)号：KR1020130034302A
公开(公告)日：2013-04-05
申请号：KR1020110098243
申请日：2011-09-28
Applicant: 포항공과대학교 산학협력단 , 서울대학교산학협력단
IPC: H04N21/6405 , H04N21/234 , H04B7/26
CPC classification number: H04N21/236 , H04L65/4038 , H04L65/602 , H04N21/2385 , H04N21/41407 , H04N21/4384 , H04N21/6405 , H04W4/06 , H04N21/234
Abstract: PURPOSE: A method for providing a mobile internet protocol television service and a system thereof are provided to minimize average processing complexity when a user changes a channel to other channels in the same channel group by using a mobile terminal. CONSTITUTION: A base station executes channel grouping corresponding to channel preference of a user(S501). The base station distinguishes a channel group with a channel requested in a mobile terminal. The base station broadcasts a multicast stream to the mobile terminal(S503). The multicast stream includes a channel stream of the requested channel and channel streams of other channels included in the channel group. When a current channel and a changed channel are included in the same channel group, the mobile terminal decodes the channel stream of the changed channel in a stream of the current channel(S505). [Reference numerals] (220) Base station; (300) Mobile terminal; (AA) No; (BB) Yes; (S501) Grouping a channel according to the channel preference of a user; (S502) Power on for watching a TV; (S503) Transmitting channel stream corresponding to a currently watching channel and channels included in a channel group which is the same as the channel; (S504) Same group?; (S505) Displaying by performing decoding for channel stream corresponding to a channel to be changed; (S506) Transmitting a channel request message; (S507) Transmitting channel stream corresponding to the requested channel and channels included in a channel group which is the same as the channel; (S508) Displaying by performing decoding for the channel stream corresponding to the channel to be changed;
Abstract translation: 目的：提供一种用于提供移动因特网协议电视服务的方法及其系统，以便当用户通过使用移动终端将信道改变到同一信道组中的其他信道时，使平均处理复杂度最小化。 构成：基站执行与用户的频道偏好对应的信道分组（S501）。 基站将信道组与移动终端中请求的信道进行区分。 基站向移动终端广播多播流（S503）。 多播流包括所请求的信道的信道流和信道组中包括的其它信道的信道流。 当当前信道和改变的信道被包括在同一信道组中时，移动终端在当前信道的流中解码改变的信道的信道流（S505）。 （220）基站; （300）移动终端; （AA）否 （BB）是的; （S501）根据用户的频道偏好对频道进行分组; （S502）看电视开机; （S503）与当前观看频道相对应的发送频道流和包含在与频道相同的频道组中的频道; （S504）同组？ （S505）通过对与要改变的信道相对应的信道流进行解码来显示; （S506）发送信道请求消息; （S507）对应于与所述信道相同的信道组中包括的所请求的信道和信道相对应的发送信道流; （S508）通过对与要改变的信道相对应的信道流执行解码来显示;
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公开(公告)号：KR1020120101942A
公开(公告)日：2012-09-17
申请号：KR1020110020086
申请日：2011-03-07
Applicant: 한국전자통신연구원 , 포항공과대학교 산학협력단
IPC: H04N21/234 , H04N19/152
CPC classification number: H04L65/607 , H04L65/4069 , H04L67/104
Abstract: PURPOSE: A fountain code based video streaming system and a method thereof are provided to supply a seamless video streaming service by using a fountain code. CONSTITUTION: Fountain encoders(400,420) of transmitting devices(40,42) perform fountain encoding of source symbols. A fountain decoder(440) decodes a source symbols by fountain decoding of the fountain-encoded symbol. A pier selector(4440) of a controller(444) selects the peers with reference to a bandwidth of peers. A symbol size determinator(4442) determines the size of a symbol in consideration of a buffer state. The symbol size determinate changes the size of a symbol by recognition of data size of a video decoding buffer(442). [Reference numerals] (40) First transmitting device; (400,420) Fountain encoding unit; (42) Second transmitting device; (44) Receiving device; (440) Fountain decoding unit; (442) Video decoding buffer; (444) Controller; (4440) Pier selector; (4442) Symbol size determinator; (AA,BB) Video stream; (CC) Bandwidth; (DD) Buffer state; (EE) Success message
Abstract translation: 目的：提供基于喷泉代码的视频流系统及其方法，以通过使用喷泉码来提供无缝视频流服务。 构成：传输设备（40,42）的喷泉编码器（400,420）执行源符号的喷泉编码。 喷泉解码器（440）通过喷泉编码符号的喷泉解码来解码源符号。 控制器（444）的码头选择器（4440）参考对等体的带宽选择对等体。 符号尺寸确定器（4442）考虑到缓冲器状态来确定符号的大小。 符号尺寸确定通过识别视频解码缓冲器的数据大小来改变符号的大小（442）。 （附图标记）（40）第一发送装置; （400,420）喷泉编码单位; （42）第二发送装置; （44）接收装置; （440）喷泉解码单元; （442）视频解码缓冲器; （444）控制器; （4440）码头选择器 （4442）符号尺寸确定器; （AA，BB）视频流; （CC）带宽; （DD）缓冲状态; （EE）成功消息
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