Apparatus and method for providing streaming contents

A method for providing media content performed by a processor in a server, the method comprising:

• receiving a request for the media content from a client;
• transmitting the media to the client based on a Media Presentation Description (MPD) of the media content,
• wherein the MPD comprises one or more periods,
• wherein the period comprises one or more groups,
• wherein the group comprises one or more representations,
• wherein the representation comprises one or more sub-representations,
• wherein the representation comprises one or more segments,
• wherein the representation includes bandwidth attribute related to bandwidth for a hypothetical constant bitrate channel in bits per second (bps),
• wherein the client is assured of having enough data continuously playout after buffering for minbuffertime, when the representation is delivered to the client,
• wherein the segment includes sub-segments indexed by segment index in the segment,
• wherein the MPD includes at least one of (i) frame rate, (ii) temporal layer of video, (iii) timescale describing the number of time units in one second, and (iv) the number of consecutive segments.