US 8,731,369 B2Granted

Multimedia distribution system for multimedia files having subtitle information

AssigneeSonic IP, Inc.

InventorsAdam H. Li, Jason Braness, Christopher Durham, Timothy Sayre, Benjamin Cote, Darrius Thompson, Jerome Rota, Alastair Mayo, Eric William Grab, Jerald Donaldson, Heather Hitchcock, Damien Chavarria, Michael John Floyd, Ahsan Butt, Brian Fudge

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Abstract

A multimedia file and methods of generating, distributing and using the multimedia file are described. Multimedia files in accordance with embodiments of the present invention can contain multiple video tracks, multiple audio tracks, multiple subtitle tracks, data that can be used to generate a menu interface to access the contents of the file and ‘meta data’ concerning the contents of the file. Multimedia files in accordance with several embodiments of the present invention also include references to video tracks, audio tracks, subtitle tracks and ‘meta data’ external to the file. One embodiment of a multimedia file in accordance with the present invention includes a series of encoded video frames and encoded menu information.

Claims10

Dependent claims

A system for decoding multimedia files comprising:

a processor configured by software to extract information from the multimedia file;
wherein the processor is configured by software to inspect the multimedia file to determine when there is at least one subtitle track;
wherein the multimedia file includes at least one video track encoded as video chunks, at least one subtitle track encoded as subtitle chunks, and an index chunk;
wherein each subtitle chunk includes information concerning a single subtitle;
wherein the index chunk includes information concerning the location of data chunks within the multimedia file including the locations of video chunks from the at least one video track and the locations of subtitle chunks from the at least one subtitle track;
and
wherein each subtitle is encoded in the subtitle chunks as a bit map;
wherein the processor is configured to decode the video chunk and identify a previous subtitle chunk that contains subtitle information for the decoded video chunk using the index chunk;
and
wherein the processor is configured by software to construct a frame of video for display by superimposing the bit map from the identified subtitle chunk over a portion of the video sequence.

7 more elements

Dependencies are inferred from the claim text.

Facts

Application: 11/016,184Filed 17 Dec 2004 · continuation in part
Priority: 8 Dec 2003
Published: US 2005/0123283 A122 Sep 2005
Granted: 20 May 2014
Term ends: Not estimatedThe source records don’t support an estimate.

Classification14 codes

H04N 5/278
Studio circuits, e.g. for mixing, switching-over, change of character of image, other special effects ; Cameras specially adapted for the…: subtitling
H04N 21/8456
Structuring of content, e.g. decomposing content into time segments: by decomposing the content in the time domain, e.g. in time segments
G11B 20/00086
Signal processing not specific to the method of recording or reproducing; Circuits therefor: circuits for prevention of unauthorised reproduction…
G11B 20/00731
Circuits for prevention of unauthorised reproduction or copying, e.g. piracy: involving a digital rights management system for enforcing a usage…

Family

Application10/731,809Parent of this continuation-in-part · filed 8 Dec 2003
US 2005/0207442 A1Pre-grant publication · published 22 Sep 2005
US 7,519,274 B2Parent of this continuation-in-part
US 2005/0123283 A1Published application
US 8,731,369 B2This patent

From the US filing history. Foreign family members aren’t listed.