Patent ID: 8984570
Filing Date: 2015-03-17
Classification: H04L,H04N

Abstract:
1. In a client device for Hypertext Transfer Protocol (HTTP) streaming transmission, a method for supporting time shift playback comprising: sending a live media presentation description (MPD) request message to a media server; receiving a response message from the media server that comprises a current MPD for a current time period, wherein the current MPD comprises media presentation information for previous time periods, and wherein the media presentation information for each previous time period comprises the previous time period and an address of a previous MPD for the previous time period; determining that a moment of a media segment to be requested currently exceeds a time range corresponding to the current MPD; determining, according to the media presentation information for previous time periods, an address of the previous MPD corresponding to the media segment to be requested currently; acquiring the corresponding previous MPD according to the address of the previous MPD; and requesting, from the media server according to the acquired previous MPD, the media segment to be requested currently.