Method for transmitting packet-based media data having header in which overhead is minimized

Patent metadata

Field	Value
Publication number	US-2016294661-A1
Application number	US-201615175953-A
Country	US
Kind code	A1
Filing date	Jun 7, 2016
Priority date	Jun 13, 2011
Publication date	Oct 6, 2016
Grant date	—

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.

First claim

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 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.

2 . The apparatus of claim 1 , wherein the transport characteristics comprises information related to transport of the asset.

3 . The apparatus of claim 1 , wherein the packet further comprises an identifier for distinguishing assets having different characteristics for each packet.

4 . The apparatus of claim 1 , wherein the predetermined data unit comprises at least one of the media fragment unit, the media unit and access unit (AU).

5 . The apparatus of claim 1 , wherein the packetization unit generates the packet, in the payload, further including a timed flag indicating whether data unit in the packet is timed media data or non-timed data unit.

6 . The apparatus of claim 5 ,
wherein when a value of the timed flag is 1, the timed flag indicates that the data unit is timed media data and when the value of the timed flag is 0, the timed flag indicates that the data unit is non-timed media data

7 . The apparatus of claim 1 , wherein the packetization unit generates the packet further including a sequence number that is increased by 1 per packet for distinguishing packets having the same said identifier.

8 . The apparatus of claim 1 , wherein the packetization unit generates the packet further including a sequence number that is increased by 1 per a packet transmission.

9 . A method for generating a packet by packetizing media data, the method comprise:
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.

10 . The method of claim 9 , wherein the transport characteristics comprises information related to transport of the asset.

11 . The method of claim 9 , wherein the packet further comprises an identifier for distinguishing assets having different characteristics for each packet.

12 . The method of claim 9 , wherein the predetermined data unit comprises at least one of the media fragment unit, the media unit and access unit (AU).

13 . The method of claim 9 , wherein the generating the packet comprising generating the packet, in the payload, further including a timed flag indicating whether data unit in the packet is timed media data or non-timed data unit.

14 . The method of claim 13 , wherein when a value of the timed flag is 1, the timed flag indicates that the data unit is timed media data and when the value of the timed flag is 0, the timed flag indicates that the data unit is non-timed media data

15 . The apparatus of claim 9 , wherein the generating the packet comprising generating the packet further including a sequence number that is increased by 1 per packet for distinguishing packets having the same said identifier.

16 . The apparatus of claim 9 , wherein the generating the packet comprising generating the packet further including a sequence number that is increased by 1 per a packet transmission.

Assignees

• Electronics & Telecommunications Res Inst

Inventors

• Bae Seong Jun

Classifications

• H04L69/04 Primary

  Protocols for data compression, e.g. ROHC · CPC title

• H04L43/106 Primary

  using time related information in packets, e.g. by adding timestamps · CPC title

• H04L69/22

  Parsing or analysis of headers · CPC title

• H04L47/365

  Dynamic adaptation of the packet size · CPC title

• H04L47/34

  ensuring sequence integrity, e.g. using sequence numbers · CPC title