Method for transmitting packet-based media data having header in which overhead is minimized
First Claim
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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 predetermined data unit, in a header of the payloadand wherein the fragmentation indicator indicates four states through a predetermined bit value,and wherein the predetermined bit value indicates (i) whether the payload contains the first fragment of the predetermined data unit, (ii) whether the payload contains the 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 complete data unit,and wherein the header of the payload comprises a flag indicating if the payload contains multiple data units.
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Abstract
Provided is a method for transmitting packet-based media data having a header in which an overhead is minimized. A method for media data transmission may comprise the steps of: encapsulating media data to allow a media fragment unit (MFU) header and an M-unit header to share one format; allowing an MMT payload format to include a header field for an operation which is not supported by an RTP header, and transferring the encapsulated media data from a specific entity to another entity; and controlling the transfer of the media data. Therefore, a transmission overhead is minimized, so that it is possible to efficiently transmit media data.
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Citations
16 Claims
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1. An apparatus for generating packet by packetizing media data, the apparatus comprise:
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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 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 the first fragment of the predetermined data unit, (ii) whether the payload contains the 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 complete data unit, and wherein the header of the payload comprises a flag indicating if the payload contains multiple data units. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for generating a packet by packetizing media data, the method comprise:
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generating a media unit by encapsulating a media fragment unit (MFU), and generating an asset based on the media unit, and generating 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 generating a payload for transport of the MMT package and generating the packet by constituting the media unit included in the asset as a payload, wherein the generating the packet comprises generating 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 the first fragment of the predetermined data unit, (ii) whether the payload contains the 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 complete data unit, a and wherein the header of the payload comprises a flag indicating if the payload contains multiple data units. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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Specification