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    • 3. 发明授权
    • Multimedia session management
    • 多媒体会话管理
    • US09003041B2
    • 2015-04-07
    • US11666891
    • 2005-11-24
    • Torbjörn EinarssonAnders NohlgrenMagnus WesterlundMagnus Andersson
    • Torbjörn EinarssonAnders NohlgrenMagnus WesterlundMagnus Andersson
    • G06F15/16H04N21/6408H04N21/438H04N21/643
    • H04N21/6408H04N21/4383H04N21/4384H04N21/643
    • A multimedia provider (100) generates, based on a request for a media channel from a user terminal (10), a session set-up description that is returned to the user terminal (10). The description defines, when processed in the terminal (10), a session window (20) that is displayed on a screen (12) of the terminal and comprises a region (22) for displaying media data of a requested channel and a channel region (24) comprising information on alternative available media channels. The description also defines a binding between user inputs (14) of the terminal (10) and identifiers of the alternative channels. The set-up description allows for a user-friendly channel switch by automatically transmitting a channel switch request to the multimedia provider (100) upon a triggering of the user input (14) that is associated with the identifier of the requested media channel. The description, thus, provides a visually appealing graphical interface and simultaneously allows for a user-friendly media channel switch.
    • 多媒体提供者(100)根据来自用户终端(10)的对媒体频道的请求生成返回给用户终端(10)的会话建立说明。 该描述定义了在终端(10)中处理的会话窗口(20),其显示在终端的屏幕(12)上,并且包括用于显示所请求的频道的媒体数据的区域(22)和信道区域 (24)包括关于替代可用媒体信道的信息。 该描述还定义了终端(10)的用户输入(14)和替代频道的标识符之间的绑定。 所述设置描述允许在触发与所请求的媒体信道的标识符相关联的用户输入(14)时,自动向多媒体提供商(100)发送频道切换请求,从而进行用户友好的频道切换。 因此,该描述提供了视觉吸引人的图形界面,同时允许用户友好的媒体频道切换。
    • 5. 发明申请
    • Multimedia Channel Switching
    • 多媒体频道切换
    • US20090222873A1
    • 2009-09-03
    • US11885931
    • 2005-12-30
    • Torbjörn Einarsson
    • Torbjörn Einarsson
    • H04N7/173H04J3/22
    • H04N21/44016H04N21/23406H04N21/23424H04N21/2401H04N21/41407H04N21/4384H04N21/44004H04N21/6408H04N21/64315
    • The invention reduces the user-perceived time of switching multimedia channels in a unicast communications system. This shortening of the switch procedure is obtained by reducing the buffering of the multimedia data in the data buffer of a user terminal. A reduced media buffering results in that multimedia data of the new channel will be rendered in the user terminal in a much shorter period of time. A multimedia provider communicating the multimedia data to the terminal determines a reduced transmission rate that will be temporarily employed for obtaining the buffering reduction. This reduced rate is lower than the normally employed transmission rate and lower than the rendering rate of the media player of the terminal. Consequently, the terminal buffer will be emptying in a faster rate than it is replenished and a buffer level reduction is obtained.
    • 本发明减少了在单播通信系统中切换多媒体信道的用户感知时间。 通过减少用户终端的数据缓冲器中的多媒体数据的缓冲来获得切换过程的这种缩短。 减少的媒体缓冲导致新信道的多媒体数据将在更短的时间段内在用户终端中呈现。 将多媒体数据传送到终端的多媒体提供商确定将暂时用于获得缓冲减少的降低的传输速率。 该降低速率低于通常使用的传输速率,并且低于终端的媒体播放器的呈现速率。 因此,终端缓冲器将以比补充更快的速率排空并获得缓冲器电平降低。
    • 7. 发明授权
    • Method and arrangement for adaption in HTTP streaming
    • HTTP流中适应的方法和布置
    • US09112933B2
    • 2015-08-18
    • US13579205
    • 2011-02-16
    • Torbjörn EinarssonPer FröjdhClinton PriddleZhuangfei Wu
    • Torbjörn EinarssonPer FröjdhClinton PriddleZhuangfei Wu
    • H04L29/06H04L29/08
    • H04L65/60H04L65/4084H04L65/607H04L65/80H04L67/02H04L67/42
    • A method of controlling adaptive HTTP streaming of media content between a HTTP server and a HTTP client in a communication system, in which system media content is arranged as a plurality of periods, and each such period comprises a plurality of representations of media segments, which method includes the steps of providing (S10) temporal alignment information for the media segments of the plurality of representations, which temporal alignment information provides indications about a temporal relation between the segments of the plurality of representations of the media content. Further, the method includes providing (S20) key frame location information for the media segments, which key frame location information provides indications about locations of key frames in the media segments of the plurality of representations. Finally, controlling (S30) adaptation of the HTTP streaming of the media content based on at least one of the provided temporal alignment information and the provided key frame location information.
    • 一种在通信系统中的HTTP服务器和HTTP客户端之间控制媒体内容的自适应HTTP流的方法,其中系统媒体内容被布置为多个周期,并且每个这样的周期包括媒体段的多个表示,其中 方法包括以下步骤:为多个表示的媒体片段提供(S10)时间对齐信息,该时间对准信息提供关于媒体内容的多个表示的片段之间的时间关系的指示。 此外,该方法包括提供(S20)媒体片段的关键帧位置信息,该关键帧位置信息提供关于多个表示的媒体片段中的关键帧的位置的指示。 最后,基于所提供的时间对准信息和所提供的关键帧位置信息中的至少一个来控​​制(S30)媒体内容的HTTP流的适配。
    • 8. 发明授权
    • Packet loss analysis
    • 丢包分析
    • US08588302B2
    • 2013-11-19
    • US12997750
    • 2008-06-13
    • Torbjörn Einarsson
    • Torbjörn Einarsson
    • H04N7/50
    • H04N17/004
    • A test sequence (1) comprises multiple pictures (20, 22, 24, 26) comprising at least one respective intra pixel block (30, 32, 34, 36) at a respective dedicated pixel position in the pictures (20, 22, 24, 26). Such a position in a first picture (20) is different from the position of the intra block (32) in a second picture (22) of the sequence. The sequence (1) is transmitted to a user terminal (200) where it is employed for testing the quality of the data communication. By rendering the pictures (20, 22, 24, 26) packet losses are identifiable as missing pixel blocks (30, 332, 34, 36) in the media presentation (60).
    • 测试序列(1)包括多个图像(20,22,24,26),其包括在图像(20,22,24,26)中的相应专用像素位置处的至少一个相应的内部像素块(30,32,34,36) ,26)。 第一图像(20)中的这种位置与序列的第二图像(22)中的块内(32)的位置不同。 将序列(1)发送到用户终端(200),用于测试数据通信的质量。 通过渲染图像(20,22,24,26),分组丢失可被识别为媒体呈现(60)中的丢失像素块(30,32,34,36)。