Methods and devices for media description delivery

A method for providing a media presentation description of an adaptive bitrate media stream provided by a media server to a client device, wherein the method comprises:

• sending a subscription request for subscribing the client device to a media presentation description delivery service from the client device to a media presentation description delivery managing device wherein the media presentation description delivery managing device is separate from the media server;
• receiving, by the client device from the media presentation description delivery managing device, information enabling the client to obtain the media presentation description from a media server;
• sending a request to obtain the media presentation description according to the received information from the client device to the media server;
• and
• receiving, by the client device, the media presentation description from the media server.

A media presentation description delivery managing device configured to support adaptive bitrate streaming of an adaptive bitrate media stream, said media presentation description delivery managing device comprising:

• at least one receiving circuit;
• at least one transmission circuit;
• a processing circuit operatively connected to the at least one receiving circuit and the at least one transmission circuit;
• wherein the processing circuit is adapted to:
• subscribe the client device to a media presentation description delivery service, the media presentation description delivery service comprising a media presentation description delivery rule;
• send, via the at least one transmission circuit, a request for a media presentation description delivery to a media server;
• receive, from the media server and via the at least one receiving circuit, a media presentation description;
• verify that the received media presentation description complies with the media presentation description delivery rule;
• and
• if the verification is in the affirmative, initiate a delivery of the media presentation description to the client device.

A client device configured to perform adaptive bitrate streaming of an adaptive bitrate media stream comprising:

• at least one receiving circuit;
• at least one transmission circuit;
• a processing circuit operatively connected to the at least one receiving circuit and the at least one transmission circuit;
• wherein the processing circuit is adapted to:
• send, via the transmission circuit, a subscription request for subscribing the client to a media presentation description delivery service provided by a media server to a media presentation description delivery managing device wherein the media presentation description delivery managing device is separate from the media server;
• receive, via the at least one receiving circuit, a media presentation description from the media presentation description delivery managing device.