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    • 1. 发明授权
    • Multiple bitrate format-agnostic streaming architecture
    • 多种比特率格式 - 不可知流媒体架构
    • US09532092B1
    • 2016-12-27
    • US12981676
    • 2010-12-30
    • Babu SuryanarayananRonnie SoMihir ParikhAshok Jaiprakash LalwaniAbdul Salam Faisal PadinjareveetilJames Egerton
    • Babu SuryanarayananRonnie SoMihir ParikhAshok Jaiprakash LalwaniAbdul Salam Faisal PadinjareveetilJames Egerton
    • G06F15/16H04N21/2662
    • H04N21/222H04L65/105H04L65/601H04L67/02H04L67/2842H04N21/23106H04N21/2358H04N21/236H04N21/2662H04N21/64322H04N21/8456H04N21/8547
    • A method and apparatus for delivering a content stream is implemented within a content delivery network (CDN) and, in one embodiment, includes the high level functions of recording the stream using a recording tier, and playing the stream using a player tier. For a live stream, the step of recording the stream includes a set of sub-steps that begins when the stream is received at a CDN entry point in a source format. The stream is then converted into an intermediate format (IF), which is an internal format for delivering the stream within the CDN and comprises a stream manifest, a set of one or more fragment indexes (FI), and a set of IF fragments. The player process begins when a requesting client is associated with a CDN HTTP proxy. In response to receipt at the HTTP proxy of a request for the stream or a portion thereof, the HTTP proxy retrieves (either from the archive or the data store) the stream manifest and at least one fragment index. Using the fragment index, the IF fragments are retrieved to the HTTP proxy, converted to a target format, and then served in response to the client request. The source format may be the same or different from the target format. Preferably, all fragments are accessed, cached and served by the HTTP proxy via HTTP.
    • 用于递送内容流的方法和装置在内容传送网络(CDN)内实现,并且在一个实施例中包括使用记录层记录流的高级功能,以及使用播放器层播放流。 对于直播流,记录流的步骤包括当在源格式的CDN入口点处接收到流时开始的一组子步骤。 然后将流转换成中间格式(IF),其是用于在CDN内递送流的内部格式,并且包括流清单,一组或多个片段索引(FI)和一组IF片段。 当请求的客户端与CDN HTTP代理关联时,播放器进程开始。 响应于在HTTP代理处接收对流或其一部分的请求,HTTP代理从数据流清单和至少一个片段索引中检索(来自归档或数据存储)。 使用片段索引,将IF片段检索到HTTP代理,转换为目标格式,然后响应客户端请求提供服务。 源格式可能与目标格式相同或不同。 优选地,HTTP代理通过HTTP访问,高速缓存和服务所有片段。