| 主权项 |
1. An apparatus for generating packet by packetizing media data, the apparatus comprise:
an encapsulation unit configured to generate a media unit by encapsulating media fragment unit (MFU), generate an asset based on the media unit, and generate an MMT package by encapsulating one or more assets, the MFU comprising data processed by media decoder, the media unit comprising codec independent format, the asset comprising one or more media units, and the package configured to comprise one or more assets along with additional information including composition information (CI) and transport characteristics (TC); and a packetization unit configured to generate a payload for transport of the MMT package and generate the packet by constituting the media unit included in the asset as the payload, wherein the packetization unit generates the packet including a fragmentation indicator of 2 bits indicating information associated with a fragmentation of a predetermined data unit, in a header of the payload, and wherein the fragmentation indicator indicates four states through a predetermined bit value, and wherein the predetermined bit value indicates (i) whether the payload contains a first fragment of the predetermined data unit, (ii) whether the payload contains a last fragment of the predetermined data unit, (iii) whether the payload contains a fragment that is neither the first nor the last fragment of the predetermined data unit, and (iv) whether the payload contains a complete data unit, and wherein the transport characteristics comprises information related to transport of the asset, and wherein the packet further comprises an identifier for distinguishing assets having different characteristics for each packet. |
