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    • 3. 发明授权
    • System and method for indicating track relationships in media files
    • 用于指示媒体文件中的跟踪关系的系统和方法
    • US08365060B2
    • 2013-01-29
    • US11844300
    • 2007-08-23
    • Ye-Kui WangMiska HannukselaImed Bouazizi
    • Ye-Kui WangMiska HannukselaImed Bouazizi
    • G06F17/00
    • H04N7/52H04N21/23424H04N21/234327H04N21/41407H04N21/4307H04N21/4347H04N21/44016
    • A system and method for signaling and indicating track relationship information in media files provides a mechanism for signaling the information of layered track groups and the information of multiple description coding (MDC) track groups, as well as a mechanism for signaling track relationship information in an efficient way. In local playback or unicast streaming applications, to select an independently decodable track for a certain media type, the information of alternate track groups is first found via the track relation box, and one track is selected from an alternate track group for the media type. If stream switching is desired, the switching track group information is found via the track relation box. In multicast applications with scalable or MDC streams, the tracks in a layered or MDC group are found via the track relation box and selected among all the layered or MDC groups.
    • 用于在媒体文件中发信号通知和跟踪关系信息的系统和方法提供了一种用于对分层轨道组的信息和多描述编码(MDC)轨道组的信息进行信令的机制,以及用于在一个 高效的方式。 在本地播放或单播流应用中,为了选择特定媒体类型的独立解码的音轨,首先通过音轨关系框找到备用音轨组的信息,并从媒体类型的备用音轨组中选择一个曲目。 如果需要流切换,则通过轨道关系框找到切换轨道组信息。 在具有可扩展或MDC流的多播应用中,分层或MDC组中的轨道通过轨道关系框找到并在所有分层或MDC组中选择。
    • 4. 发明授权
    • System and method for signaling availability of an MBMS user service in multiple variants
    • 用于以多种变体表示MBMS用户服务的可用性的系统和方法
    • US08363585B2
    • 2013-01-29
    • US12255602
    • 2008-10-21
    • Imed Bouazizi
    • Imed Bouazizi
    • H04H20/71
    • H04W72/005
    • A system and method for signaling the availability of a Multimedia Broadcast/Multicast Service (MBMS) user service in multiple variants. Various embodiments involve the usage of the additional capacity introduced by MBMS Over a Single Frequency Network (MBSFN) in order to carry a higher quality or more robust variant of the service in MBMS. The broadcast multicast service center (BM-SC) provides the same MBMS user service in two variants, one for the regular MBMS and the other for MBSFN. The MBSFN variant of the service may be charged differently and would then need to be protected separately. In various embodiments, the user equipment is informed that the same service is present in different variants and therefore can then select one of the available variants for consumption.
    • 一种用于以多种变体表示多媒体广播/多播服务(MBMS)用户服务的可用性的系统和方法。 各种实施例涉及通过单频网络(MBSFN)上的MBMS所引入的附加容量的使用,以便在MBMS中携带更高质量或更强大的服务变体。 广播多播服务中心(BM-SC)以两种变体提供相同的MBMS用户服务,一种用于常规MBMS,另一种用于MBSFN。 服务的MBSFN变体可以被不同地充电,然后需要被单独地保护。 在各种实施例中,向用户设备通知相同的服务以不同的变体存在,并且因此可以选择可用的变体之一进行消费。
    • 5. 发明授权
    • System and method for an improved MBMS to PSS handover
    • 用于改进的MBMS到PSS切换的系统和方法
    • US08233446B2
    • 2012-07-31
    • US12363642
    • 2009-01-30
    • Ramakrishna VedanthamImed Bouazizi
    • Ramakrishna VedanthamImed Bouazizi
    • H04W4/00
    • H04W36/02H04W4/06H04W72/005
    • A system and method for ensuring an improved transition at the application layer when distribution of media is changed from broadcast/multicast bearers to unicast bearers and vice versa. A mapping is defined between the timeline of a Packet-Switched Streaming Service (PSS) session and the Multimedia Broadcast Multicast Service (MBMS) session timeline. This mapping is used to enable the correct positioning of the stream in a PSS session by a PSS server after a handover has occurred. Broadcast multicast service center (BM-SC) signals can support various options for media playback after a MBMS-PSS handover in a PSS session description protocol (SDP) file or in the MBMS user service description (USD). In response, the client can signal its choice in the RTSP request that is sent when switching to the PSS session.
    • 一种用于确保当媒体分发从广播/多播承载变为单播承载时应用层改进的转换的系统和方法,反之亦然。 在分组交换流服务(PSS)会话的时间线和多媒体广播多播服务(MBMS)会话时间线之间定义映射。 该映射用于在切换发生之后由PSS服务器在PSS会话中正确定位流。 广播多播服务中心(BM-SC)信号可以在PSS会话描述协议(SDP)文件或MBMS用户服务描述(USD)中的MBMS-PSS切换之后支持用于媒体回放的各种选项。 作为响应,客户端可以在切换到PSS会话时发送的RTSP请求中指示其选择。