Synchronization mechanism and the implementation for multimedia captioning and audio descriptions

• US 20040205830A1
• Filed: 04/10/2003
• Published: 10/14/2004
• Est. Priority Date: 04/10/2003
• Status: Active Grant

• Current Assignee: Microsoft Technology Licensing LLC (Microsoft Corporation)
• Original Assignee: Microsoft Corporation
• Inventors: Kaneko, Masahiko
• Granted Patent: US 7,676,737 B2
• Time in Patent Office: Days
• US Class Current: 725/135
• CPC Class Codes: H04L 65/1101 Session protocols
• CPC Class Codes: H04L 65/613 for the control of the source by the destination control signals issued by the client directed to the server or network components specially adapted for selective content distribution H04N21/637
• CPC Class Codes: H04N 21/4143 embedded in a Personal Computer [PC]
• CPC Class Codes: H04N 21/426 Internal components of the client ; Characteristics thereof H04N5/44 takes precedence
• CPC Class Codes: H04N 21/4884 for displaying subtitles
• CPC Class Codes: H04N 21/8455 involving pointers to the content, e.g. pointers to the I-frames of the video stream
• CPC Class Codes: H04N 21/8456 by decomposing the content in the time domain, e.g. in time segments
• CPC Class Codes: H04N 21/858 Linking data to content, e.g. by linking an URL to a video object, by creating a hotspot
• CPC Class Codes: H04N 5/073 for mutually locking plural sources of synchronising signals, e.g. studios or relay stations

Abstract

A system for outputting a media stream and supplemental media streams is provided. A media stream manager outputs the media stream and associated supplemental media streams on a media stream output device. A timing module generates triggering events in conjunction with the output of the media streams according to event data. The media stream manager monitors for and detects the triggering events during the output of the media streams. Upon detecting a triggering event, the media stream manager determines which supplemental media streams are associated with the triggering event and iteratively outputs each associated supplemental media stream to the media stream output device. Supplemental media streams are output either synchronously or asynchronously according to previously determined information. A supplemental media stream that is output asynchronously to the media stream suspends the media stream and the timing of the media stream while the supplemental media stream is output.

Claims