Patent ID: 9025659
Filing Date: 2015-05-05
Classification: G11B,H04L,H04N

Abstract:
1. A method of encoding source media including a subtitle track as a plurality of alternative video streams and a subtitle stream using a source encoder wherein the subtitle track is textually encoded, the method comprising: selecting a portion of the source media using the source encoder; transcoding the selected portion of the source media into a plurality of alternative portions of encoded video using the source encoder, where each alternative portion is encoded using a different set of encoding parameters and commences with an intra frame at the start of a closed group of pictures (GOP); writing each of the plurality of alternative portions of the selected portion of encoded video to a separate one of a plurality of container files using the source encoder; writing a subtitle stream segment from the subtitle track corresponding to the selected portion of the source media to a separate one of the plurality container files using the source encoder; associating a font file with the one of the plurality of container files containing subtitle stream segments wherein the font file includes information for representing the encoded text of the stream segment; attaching the font file to the associated one of the plurality of container files; and including a separate element in the one of the plurality of container files that includes metadata describing the font file.