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USING A MANIFEST XML FILE TO CONVEY SCTE 35 MESSAGING INFORMATION THROUGH THE USE OF AN ALTERNATIVE VIDEO/AUDIO VIEW MECHANISM

IP.com Disclosure Number: IPCOM000200111D
Publication Date: 2010-Sep-28
Document File: 2 page(s) / 112K

Publishing Venue

The IP.com Prior Art Database

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  U S I N G A M A N I F E S T X M L F I L E T O C O N V E Y S C T E 3 5 M E S S A G I N G I N F O R M A T I O N T H R O U G H T H E U S E O F A N A L T E R N A T I V E V I D E O / A U D I O V I E W M E C H A N I S M

Author: Yasser F. Syed

In Fragmentation and Smooth Streaming approaches that use an MPEG-4 file format (1449960- 12/14/15) there is no approach to carry an SCTE 35 cue tone message that may come in as part of an MPEG-2 Transport stream containing the video stream.

The described method proposes to use a manifest (or equivalent) file first requested by the client to convey the information needed to insert the local ad. The information in the SCTE 35 cue message (in point/out point/duration) may be converted to information contained in the manifest file that will allow the switching to the local ad fragment through the use of alternative video and audio fragments that can be carried in the manifest file. The webserver or even a router down the wire can send the alternative fragment to the client.

Local Ad Insertion typically uses SCTE 35 messages in a specific packet identifier (PID) in an MPEG-2 transport stream. This PID information may be described in a program map table. What the SCTE 35 message can indicate is an outpoint for exiting from the main video/audio stream or an inpoint for going to the main video/audio stream. A national ad that is in the main video/audio stream may be overlaid with the local ad insertion. In terms of fragmentation, output would basically replace a fragment of the main video/audio fragment (usually the national commercial) with an alter...