Synchronized stream packing

Abstract

There are provided methods and apparatus for synchronized stream packing of packets that differ contextually between A/V streams in a parallel presentation. A method includes the step of identifying sub-picture/subtitle packets and/or audio packets having arrival timestamps and/or presentation timestamps that match an arrival timestamp and/or a presentation timestamp, respectively, of video packets. The method also includes the step of packing a Video Object Unit (VOBU) and/or a Transport Stream (TS) with the identified sub-picture/subtitle and audio packets and the video packets having the matching timestamps.

1 - 10 . (canceled) 
     
     
         11 . A method for producing a storage medium containing a plurality of A/V streams that differ contextually for enabling to present a different A/V stream from among the plurality of A/V streams in a presentation of multiple parallel A/V streams by a playback apparatus, the method including the steps of:
 packing an audio frame header into an audio packet at a beginning of a first Video Object Unit (VOBU) in an InterLeaVe Unit (ILVU), or at an angle change point in a Transport Stream (TS); and   packing a last audio packet, in a last VOBU in the ILVU or another ILVU in a same one of a plurality of A/V streams, or, immediately prior to another angle change point in the TS, wherein the last audio packet is packed such that audio fragmentation is non-existent across any ILVU boundaries or angle change points.