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公开(公告)号:KR1020130008438A
公开(公告)日:2013-01-22
申请号:KR1020110135468
申请日:2011-12-15
Applicant: 한국전자통신연구원
CPC classification number: H04L1/004 , H04L2012/5664
Abstract: PURPOSE: A forward error correction control method in a multimedia packet transmission network is provided to offer a smooth forward error correction function between a transmission part and reception part by providing a kit header format. CONSTITUTION: An arrived MMT packet 1 adjusts length of an MMT packet to length of Smax by adding a D-layer packet header(121a), an MMT payload(121b) and a first size padding(121c). An arrived MMT packet 2 adjusts length of an MMT packet to length of Smax by adding a second size padding to the D-layer packet header and MMT payload. An arrived MMT packet k adjusts length of an MMT packet to length of Smax by adding a predetermined size padding to the D-layer packet header and MMT payload. Padding data are removed after erasure coding. An original MMT packet and a parity packet are transmitted. [Reference numerals] (AA) Source block
Abstract translation: 目的:提供多媒体分组传输网络中的前向纠错控制方法,通过提供套件头格式,在发送部分和接收部分之间提供平滑的前向纠错功能。 构成:到达的MMT包1通过添加D层包头(121a),MMT有效载荷(121b)和第一尺寸填充(121c)来调整MMT包的长度到Smax的长度。 到达的MMT分组2通过向D层分组报头和MMT有效载荷添加第二大小的填充来调整MMT分组的长度到Smax的长度。 到达的MMT分组k通过将预定大小的填充添加到D层分组报头和MMT有效载荷来调整MMT分组的长度到Smax的长度。 擦除编码后,删除填充数据。 发送原始MMT分组和奇偶校验分组。 (附图标记)(AA)源块
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公开(公告)号:KR101001024B1
公开(公告)日:2010-12-14
申请号:KR1020080013496
申请日:2008-02-14
Applicant: 한국전자통신연구원
CPC classification number: H04L12/6418 , H04L63/0428 , H04L65/4076 , H04L65/608
Abstract: 본 발명의 비디오 멀티캐스팅 서비스에서 정보 보안 유지 방법은 수신된 비디오 정보를 이용하여 네트워크 추상 계층 단위를 생성하는 단계, 상기 비디오 정보의 네트워크 추상 계층 단위를 암호화 하는 단계, 상기 암호화된 비디오 정보의 네트워크 추상 계층 단위를 실시간 전송 프로토콜 패킷화 하는 단계, 상기 메모리에 저장된 비디오 정보의 네트워크 추상 계층 단위에 포함된 단위 형식 정보와 필드 정보를 상기 실시간 전송 프로토콜 헤더의 헤더 확장 필드에 기록하는 단계 및 상기 암호화된 비디오 정보를 포함한 실시간 전송 프로토콜 패킷을 멀티캐스팅 라우팅 장치로 전송하는 단계를 포함한다.
멀티캐스팅, 라우터, 패킷-
53.
公开(公告)号:KR1020100071688A
公开(公告)日:2010-06-29
申请号:KR1020080130490
申请日:2008-12-19
Applicant: 한국전자통신연구원
CPC classification number: H04N21/234327 , H04N19/30 , H04N19/61 , H04N19/70 , H04N21/4363 , H04N21/4516 , H04N21/454 , H04N21/4621 , H04N21/8451
Abstract: PURPOSE: A streaming service device for a universal video access based on scalable video coding and a method thereof are provided to easily check the properties of SVC video hierarchical data. CONSTITUTION: An SVC(Scalable Video Coding) contents file parser unit(322) receives an SVC contents file from a streaming server. The SVC contents file parser unit divides an SVC NAL(Network Abstraction Layer) unit included in the SVC contents file into a base layer and an enhancement layer. An SVC NAL selecting unit(324) selects the SVC NAL unit corresponding to a client type of each terminal. An RTP(Real-time Transport Protocol) packet generator(326) transmits the SVC NAL unit selected according to a client type to a corresponding terminal.
Abstract translation: 目的:提供一种基于可伸缩视频编码的通用视频访问流传输服务器件及其方法,以便于检查SVC视频分层数据的属性。 构成:SVC(可缩放视频编码)内容文件解析器单元(322)从流服务器接收SVC内容文件。 SVC内容文件解析器单元将包括在SVC内容文件中的SVC NAL(网络抽象层)单元划分为基本层和增强层。 SVC NAL选择单元(324)选择与每个终端的客户端类型对应的SVC NAL单元。 RTP(实时传输协议)分组生成器(326)将根据客户端类型选择的SVC NAL单元发送到相应的终端。
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54.
公开(公告)号:KR1020090108958A
公开(公告)日:2009-10-19
申请号:KR1020080034323
申请日:2008-04-14
Applicant: 한국전자통신연구원
IPC: H04L12/861 , H04N21/43
CPC classification number: H04L49/9005 , H04L47/54 , H04N21/238 , H04N21/435
Abstract: PURPOSE: An initial buffering time determining method for a progressive media streaming service and a system thereof are provided to supply static buffer operation structure through the minimum buffering time. CONSTITUTION: An initial buffering time determining method for a progressive media streaming service and a system thereof are as follows. A packet for a progressive streaming service is received(S710). Probability of the received packet loss is calculated based on time value buffered in a buffer(S720). In case that probability of packet loss is higher than selected value, the buffering time for preventing packet loss of the buffer is calculated(S730).
Abstract translation: 目的:提供用于逐行媒体流服务及其系统的初始缓冲时间确定方法,以通过最小缓冲时间提供静态缓冲器操作结构。 构成:逐行媒体流服务的初始缓冲时间确定方法及其系统如下。 接收用于逐行流服务的分组(S710)。 基于在缓冲器中缓冲的时间值计算接收到的分组丢失的概率(S720)。 在丢包概率高于选择值的情况下,计算缓冲时间的缓冲时间(S730)。
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公开(公告)号:KR1020160004960A
公开(公告)日:2016-01-13
申请号:KR1020150094828
申请日:2015-07-02
Applicant: 한국전자통신연구원 , 연세대학교 원주산학협력단
IPC: H04N21/234
Abstract: 오류은닉을위한 MMT 송/수신장치및 이의오류은닉방법이개시된다. 일실시예에따른 MMT 송신엔티티에서의오류은닉방법은전송할 MPU에포함되는데이터에대하여미디어샘플단위로최적의오류은닉알고리즘을결정하는단계및 결정된상기오류은닉알고리즘을지시하는샘플단위의오류은닉모드정보가포함된오류은닉모드시그널링메시지를생성하여 MMT 수신엔티티에게전송하는단계를포함한다.
Abstract translation: 公开了用于错误隐藏的MPEG媒体传输(MMT)发送/接收装置及其错误隐藏方法。 根据本发明的实施例,MMT发送实体中的错误隐藏方法包括以下步骤:将优化的错误隐藏算法确定为包含在要发送的媒体处理单元(MPU)中的数据上的媒体采样单元; 并生成错误隐藏模式信令消息,其包括指示确定的错误隐藏算法的采样单元的错误隐藏模式信息,并将错误隐藏模式信令消息发送到MMT接收实体。
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公开(公告)号:KR1020150047081A
公开(公告)日:2015-05-04
申请号:KR1020140087791
申请日:2014-07-11
Applicant: 한국전자통신연구원 , 연세대학교 원주산학협력단
IPC: H04N21/234 , H04N21/235
CPC classification number: H04N21/64738
Abstract: 본발명은 MMT 오버헤드감축형페이로딩장치로, 입력되는미디어프로세싱유닛(Media Processing Unit: MPU) 프래그먼트타입을분류하는타입분류부와, 상기분류된 MPU 프래그먼트타입과상이한타입의다른 MPU 프래그먼트와통합할경우의통합패킷의크기와최대전송단위(Maximum Transmission Unit : MTU)의크기와비교하는사이즈비교부와, 상기사이즈비교결과에따라, 둘이상의상이한타입의 MPU 프래그먼트들을통합하여 MMT 페이로드를생성하는페이로드생성부와, 상기생성된페이로드에헤더를부가하는헤더생성부를포함한다.
Abstract translation: 本发明涉及一种MMT开销减少付费装置,包括:类型分类单元,用于对输入的媒体处理单元(MPU)片段的类型进行分类; 当分类的MPU片段类型和不同类型的另一个MPU片段被聚合时,用于将聚合分组的大小与最大传输单元(MTU)的大小进行比较的大小比较单元; 有效载荷生成单元,其根据大小比较的结果,通过聚合两种以上的不同类型的MPU片段来生成MMT有效载荷; 以及标题生成单元,用于将标题添加到所生成的有效载荷。
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公开(公告)号:KR1020140008237A
公开(公告)日:2014-01-21
申请号:KR1020130049304
申请日:2013-05-02
Applicant: 연세대학교 원주산학협력단 , 한국전자통신연구원
IPC: H04N21/236 , H04N21/434
CPC classification number: H04L69/22 , H04L67/02 , H04L67/14 , H04L69/28 , H04L69/327 , H04N21/2381 , H04N21/242 , H04N21/64322 , H04N21/6437 , H04N21/8547
Abstract: The present invention relates to an apparatus for transmitting packets in an MPEG media transport (MMT) system comprising: an MMT packetizing unit which generates MMT packets by recording standard time information related to a media access unit (AU) for providing synchronization of the media AU; and a transmission unit which transmits the generated MMT packets to a recipient side. Accordingly, a synchronization between different media can be provided in a hybrid transmission environment where media streams belonging to one program are transmitted from different servers. [Reference numerals] (AA) Start; (BB) End; (S510) AU input; (S520) Generate MPU by encapsulating the AU; (S530) Generate PTS relative to a first AU among the MPUs; (S540) Generate UTC information corresponding to the PTS? (UTC_resolution=?); (S550) Include UTC resolution information and generate UTC time information corresponding to the PTS(One among the UTC_resolution, UTC_32, UTC_48, and UTC_64); (S555) Generate the UTC resolution information(UTC_resolution); (S560) Store the generated UTC time information in an MPU header or MMT-CI; (S570) Generate an MMT asset
Abstract translation: 本发明涉及一种用于在MPEG媒体传输(MMT)系统中发送分组的装置,包括:MMT分组单元,其通过记录与媒体接入单元(AU)相关的标准时间信息来产生MMT分组,用于提供媒体AU的同步 ; 以及发送单元,其将生成的MMT分组发送到接收方。 因此,可以在混合传输环境中提供不同媒体之间的同步,其中属于一个节目的媒体流从不同的服务器发送。 (附图标记)(AA)开始; (BB)结束; (S510)AU输入; (S520)通过封装AU生成MPU; (S530)生成相对于MPU中的第一AU的PTS; (S540)生成对应于PTS的UTC信息? (UTC_resolution =?); (S550)包括UTC分辨率信息并生成对应于PTS的UTC时间信息(UTC_resolution,UTC_32,UTC_48和UTC_64之一); (S555)生成UTC分辨率信息(UTC_resolution); (S560)将生成的UTC时间信息存储在MPU头或MMT-CI中; (S570)生成MMT资产
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公开(公告)号:KR1020120041095A
公开(公告)日:2012-04-30
申请号:KR1020110030790
申请日:2011-04-04
Applicant: 한국전자통신연구원 , 연세대학교 산학협력단
CPC classification number: H04L65/60 , H04L1/0042 , H04L29/06027 , H04L47/19 , H04L47/28 , H04L65/604 , H04L65/605 , H04L65/607 , H04L65/80 , H04L69/163 , H04N21/4302
Abstract: PURPOSE: An apparatus and a method for transmitting/receiving a streaming service are provided to calculate an inter arrival jitter by using the arrival time and the estimated arrival time of a TCP packet. CONSTITUTION: A TCP packet is received(1210). A clock count TCPa(n+1) is measured(1220). A time stamp TCPt(n+1) is tested(1230). A TCPt(n+1) is extracted from the TCP packet(1240). A network jitter N(n+1) through a TCP(n+1) is calculated(1245). An arrival time interval D(n+1) between the TCP(n+1) and a TCP(n) are calculated(1250). An analysis time for the determination of a de-jitter buffering time is tested(1260). A calculated de-jitter buffering time B(n+1) is determined as a final de-jitter buffering time(1290). The analysis time of T is determined as the final de-jitter buffering time(1295).
Abstract translation: 目的:提供一种用于发送/接收流服务的装置和方法,以通过使用TCP分组的到达时间和估计的到达时间来计算中间到达抖动。 构成:接收到TCP数据包(1210)。 测量时钟计数TCPa(n + 1)(1220)。 时间戳TCPt(n + 1)被测试(1230)。 从TCP分组(1240)提取TCPt(n + 1)。 计算通过TCP(n + 1)的网络抖动N(n + 1)(1245)。 计算TCP(n + 1)和TCP(n)之间的到达时间间隔D(n + 1)(1250)。 测试去抖动缓冲时间的分析时间(1260)。 计算的去抖动缓冲时间B(n + 1)被确定为最终去抖动缓冲时间(1290)。 T的分析时间被确定为最终去抖动缓冲时间(1295)。
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