公开(公告)号：US20130227158A1

公开(公告)日：2013-08-29

申请号：US13775885

申请日：2013-02-25

Applicant: STMicroelectronics S.r.I.

Inventor： Konstantin MILLER ,  Emanuele QUACCHIO

IPC: H04L29/06

CPC classification number: H04L65/60 ,  H04L65/4084 ,  H04L65/4092 ,  H04L65/602 ,  H04L65/80

Abstract: In an embodiment, a control unit includes a determiner and a requestor. The determiner is configured to determine media-data rate in response to the network throughput and one of multiple fill ranges to which a level of a buffer corresponds, and the requestor is configured to request a media-file segment having the determined media-data rate. For example, such a control unit may be able to control the streaming of a video file in a way that reduces or prevents buffer underflows (i.e., video “freezes”), reduces the start-up delay, and that reduces the frequency of changes from one quality level (e.g., resolution) to another quality level, while streaming the highest-quality version of the video file that the data throughput allows. That is, the control unit seeks to maximize the streamed video quality while minimizing the number of buffer underflows, the number of changes in the streamed resolution caused by changes in the throughput, and the start-up delay.

Abstract translation: 在一个实施例中，控制单元包括确定器和请求者。 确定器被配置为响应于网络吞吐量和缓冲器级别对应的多个填充范围中的一个来确定媒体数据速率，并且请求者被配置为请求具有确定的媒体数据速率的媒体文件段 。 例如，这样的控制单元可以能够以减少或防止缓冲器下溢（即，视频“冻结”）的方式来控制视频文件的流式传输，减少启动延迟，并且减少变化的频率 从一个质量水平（例如，分辨率）到另一个质量水平，同时流式传输数据吞吐量允许的最高质量的视频文件。 也就是说，控制单元寻求使传输的视频质量最大化，同时最小化缓冲器下溢的数量，由吞吐量的变化引起的流分辨率的改变的数量以及启动延迟。