Video data stream concept
Decoder retrieval timing information, ROI information and tile identification information are conveyed within a video data stream at a level which allows for an easy access by network entities such as MANEs or decoder. In order to reach such a level, information of such types are conveyed within a video data stream by way of packets interspersed into packets of access units of a video data stream. In accordance with an embodiment, the interspersed packets are of a removable packet type, i.e. the removal of these interspersed packets maintains the decoder's ability to completely recover the video content conveyed via the video data stream.
1. A method for encoding video content into a video data stream, the method comprising:
encoding the video content into the video data stream using predictive and entropy coding, in units of slices into which pictures of the video content are spatially sub-divided, using a coding order among the slices, with restricting predictions of the predictive coding and/or entropy coding to the inner of tiles into which the pictures of the video content are spatially sub-divided; and
packetizing the sequence of the slices into payload packets of a sequence of packets of the video data stream in the coding order, the sequence of packets being divided into a sequence of access units so that each access unit collects the payload packets having packetized thereinto slices relating to a respective picture of the video content,
wherein the sequence of packets has tile identification packets interspersed thereinto between payload packets of one access unit, identifying one or more tiles overlaid by any slice packetized into one or more payload packets immediately following the respective tile identification packet in the sequence of packets.
2. The method of claim 1 , wherein the tile identification packets identify the one or more tiles overlaid by any slice packetized into exactly the immediately following payload packet.
3. The method of claim 1 , wherein the tile identification packets identify the one or more tiles overlaid by any slice packetized into the one or more payload packets immediately following the respective tile identification packet in the sequence of packets until the earlier of an end of the current access unit, and the next tile identification packet, respectively, in the sequence of packets.
4. The method of claim 1 , wherein the video data stream is a scalable video coding (SVC) data stream.
5. A network entity comprising:
a microprocessor configured to receive a video data stream encoded by the method of claim 1 , and to identify, based on the tile identification packets, tiles which are overlaid by slices packetized into one or more payload packets immediately following the respective tile identification packet in the sequence of packets.
6. The network entity of claim 5 , wherein the network entity is configured to use a result of the identification so as to decide on transmission tasks pertaining the video data stream.
7. The network entity of claim 6 , wherein the transmission tasks comprise re-transmission requests concerning defect packets.
8. The network entity of claim 5 , wherein the network entity is configured to handle different tiles with different priority by assigning a higher priority to tile identification packets and the payload packets immediately following the respective tile identification packet having slices packetized thereinto which overlay tiles identified by the respective tile identification packets for which the priority is higher, then to tile identification packets and the payload packets immediately following the respective tile identification packet having slices packetized thereinto which overlay tiles identified by the respective tile identification packets for which the priority is lower.
9. The network entity of claim 8 , wherein the network entity is configured to first request a retransmission of payload packets having the higher priority assigned thereto, before requesting any retransmission of payload packets having the lower priority assigned thereto.
10. The network entity of claim 5 , wherein the video data stream is a scalable video coding (SVC) data stream.
11. The network entity of claim 5 , wherein the network entity is a decoder.
12. A method comprising:
receiving a video data stream encoded by the method of claim 1 ; and
identifying, based on the tile identification packets, tiles which are overlaid by slices packetized into one or more payload packets immediately following the respective tile identification packet in the sequence of packets.
13. The method as of claim 12 , wherein the video data stream is a scalable video coding (SVC) data stream.
14. An encoder configured to:
code into a video data stream video content using predictive and entropy coding in units of slices into which pictures of the video content are spatially sub-divided, and using a coding order among the slices, with restricting predictions of the predictive coding and/or entropy coding to the inner of tiles into which the pictures of the video content are spatially sub-divided; and
packetize the sequence of the slices into payload packets of a sequence of packets of the video data stream in the coding order, the sequence of packets being divided into a sequence of access units so that each access unit collects the payload packets having packetized thereinto slices relating to a respective picture of the video content,
wherein the sequence of packets has tile identification packets interspersed thereinto between payload packets of one access unit, identifying one or more tiles overlaid by any slice packetized into one or more payload packets immediately following the respective tile identification packet in the sequence of packets.
15. The encoder of claim 14 , wherein the video data stream is a scalable video coding (SVC) data stream.