METHOD AND APPARATUS FOR SUPPORTING TIME SHIFT PLAYBACK IN ADAPTIVE HTTP STREAMING TRANSMISSION SOLUTION

摘要

The present invention discloses a method, an apparatus, and a system for supporting time shift playback and seamless switching between live broadcast and Video on Demand in an adaptive HTTP streaming transmission solution. The method includes: sending a live MPD request message to a media server; receiving a response message that includes MPD for a current time period and is returned by the media server, where the MPD further includes media presentation information for another time period; determining that a moment of a media segment to be requested currently exceeds a time range corresponding to the MPD, and determining, according to the media presentation information for another time period, the media presentation information corresponding to the media segment to be requested currently; acquiring the corresponding MPD according to the media presentation information corresponding to the media segment to be requested currently, and requesting, from the media server according to the acquired corresponding MPD, the media segment to be requested currently. In this manner, a client supports time shift and playback of a larger time range, and at the same time, the size of the MPD is capable of remaining in an acceptable range.