Apple_http_live_streaming(HLS)白皮书

Apple_http_live_streaming(HLS)白皮书，介绍了hls架构，对学习Hls还是有帮助的Http Lve StreaMingHLIP LVE STREAMINGOriginally developed by Apple for its iPhone platformThe specification is an IETF Internet-DraftPure HITP deliveryNo firewall issuesNo special server needed(any web server will doARCHITECTUREServer componentDistribution componentClient softwareARCHITECTUREServerDistributionmediastreamencodersegmenterIndexMPEG 2Tlletstransport streamA/V inputHttpClientARCHITECTUREServerMedia encodermediastreamencodersegmenterMPEG 2Outputs an MPEG-2 Transporttransport streamStreamA/V inputStream SegmenterCuts the stream in small files ofequal durationCreates/updates an.m3u8 indexfilesARCHITECTUREServerDistributionmediastreamencodersegmenterIndexMPEG 2Tlletstransport streamA/V inputHttpClientARCHITECTUREDistributionDistributionOrdinary web server orIndexfiletsWeb cachinng/proxy systemServes index file stream segmentsHttpClientClientFetches index fileFetches stream segments insequenceFEATURESOn-Demand Streaming(VOD) and Live StreamingContent ProtectionEncryption: AES-128, key files listed in index fileKey tiles served by HI IP or HI IPs,can be protected by own session-based authentication schemeStream alternatives and Failover protection