Invention Grant
- Patent Title: Method for enabling use of HLS as a common intermediate format
- Patent Title (中): 使HLS作为通用中间格式的方法
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Application No.: US14244165Application Date: 2014-04-03
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Publication No.: US09584577B2Publication Date: 2017-02-28
- Inventor: Matt Caulfield , Eric Friedrich , Carol Iturralde
- Applicant: Cisco Technology Inc.
- Applicant Address: US CA San Jose
- Assignee: Cisco Technology, Inc.
- Current Assignee: Cisco Technology, Inc.
- Current Assignee Address: US CA San Jose
- Agent Samuel M. Katz
- Main IPC: H04L29/06
- IPC: H04L29/06

Abstract:
In one embodiment a method, system, and apparatus is described for providing multimedia content from a server to a plurality of media devices, the method including providing a computing device an HTTP Live Streaming (HLS) playlist for playing in an adaptive bitrate client, the playlist including a list of at least two segments, each of the segments having an associated duration field, for each segment in the playlist, assigning a timestamp which is equal to the sum the durations of each previous segment in the playlist, calculating a calculated duration of the playlist by subtracting a time stamp of the first segment in the playlist from the time stamp of the last segment in the playlist, determining a real duration of the playlist by subtracting a first presentation time stamp (PTS) of the first segment in the playlist from the last presentation time stamp (PTS) of the last segment in the playlist, computing a playlist drift by subtracting the calculated duration of the playlist from the real duration of the playlist, determining a correction factor by dividing the playlist drift by the number of segments in the playlist, and calculating a new timestamp for each segment in the playlist by adding the correction factor to the time stamp of the segment. Related methods, systems, and apparatus are also described.
Public/Granted literature
- US20150288736A1 Method for Enabling Use of HLS as a Common Intermediate Format Public/Granted day:2015-10-08
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