Video decoder initialization information
A mechanism for processing video data is disclosed. Video decoder initialization information is signaled between an encoder to a decoder. The video decoder initialization information contains a range of initialization parameters. A conversion is performed between a visual media data and a visual media data file based on the range of initialization parameters.
1. A method for processing video data comprising:
receiving a bitstream that signals video decoder initialization information containing a range of initialization parameters; and
performing a conversion between a visual media data and a visual media data file based on the range of initialization parameters;
wherein the method is performed by a decoder, and wherein the decoder is reinitialized when at least one of a general timing parameter and a hypothetical reference decoder (HRD) parameter is changed.
2. The method of claim 1 , wherein the video decoder initialization information is signaled in at least one Decoding Capability Information (DCI) Network Abstraction Layer (NAL) unit in at least one bitstream.
3. The method of claim 1 , wherein the video decoder initialization information is signaled in at least one decoder initialization information (DII) supplemental enhancement information (SEI) message in at least one bitstream.
4. The method of claim 3 , wherein the DII SEI message is required to be present in a first access unit (AU) of a corresponding bitstream.
5. The method of claim 1 , wherein the video decoder initialization information is signaled in an International Organization for Standardization (ISO) base media file format (ISOBMFF) file in a file-level box, a movie-level box, at least one track-level box, or combinations thereof.
6. The method of claim 1 , wherein the video decoder initialization information is signaled in a file-level metadata box, a movie-level metadata box, a movie header box, a sample description box, a track header box, a track group box, a track-level metadata box, or combinations thereof.
7. The method of claim 1 , wherein the video decoder initialization information is signaled in a Dynamic Adaptive Streaming over Hypertext Transfer Protocol (DASH) Media Presentation Description (MPD).
8. The method of claim 1 , wherein the video decoder initialization information is signaled in an adaptation set, a representation, or combinations thereof.
9. The method of claim 1 , wherein the video decoder initialization information is signaled in a real-time transport protocol (RTP) header extension.
10. The method of claim 1 , wherein the video decoder initialization information is signaled as part of a session description protocol (SDP) offer, an SDP answer, or combinations thereof.
11. The method of claim 1 , wherein the video decoder initialization information comprises a maximum number of decoded pictures (maxDecPics) stored in a decoded picture buffer (DPB) when decoding the bitstream, a maximum decoded picture width (maxDecPicW) of coded pictures in the bitstream, a maximum decoded picture height (maxDecPicH) of coded pictures in the bitstream, or combinations thereof, or
the video decoder initialization information comprises an indication of usage of inter-layer prediction, reference picture resampling, wrap around motion compensation, motion vector prediction from reference pictures, palette coding mode, adaptive color transform, intra block copy, adaptive loop filter (ALF) adaptation parameter set (APS) NAL unit, luma mapping with chroma scaling (LMCS) APS NAL unit, scaling list APS NAL unit, or combinations thereof in a corresponding bitstream.
12. The method of claim 1 , wherein the video decoder initialization information comprises an indication of a maximum picture order count between a current picture and a corresponding reference picture; or
the video decoder initialization information comprises an indication of maximum color format, maximum bit depth, maximum coded picture buffer size, minimum coding unit (CU) size, scaling ratio calculation information, or combinations thereof.
13. The method of claim 1 , wherein the video decoder initialization information comprises an indication of usage of deblocking, padding, sub-picture partitioning, slice partitioning, tile partitioning, wrap-around motion compensation, reference picture resampling, long term reference pictures, or combinations thereof, or
the video decoder initialization information comprises a maximum tier to which all coded video sequences (CVSs) of a corresponding bitstream conform, a maximum level to which all CVSs of a corresponding bitstream conform, or combinations thereof.
14. The method of claim 1 , wherein the video decoder initialization information comprises an indication of a video codec used to perform the conversion between the visual media data and the visual media data file; or
the video decoder initialization information comprises a profile to which all bitstreams conform.
15. The method of claim 1 , wherein the decoder is reinitialized when profile, tier, and level (PTL) information is changed.
16. The method of claim 1 , wherein the conversion comprises generating the visual media data file according to the visual media data.
17. The method of claim 1 , wherein the conversion comprises parsing the visual media data file to obtain the visual media data.
18. An apparatus for processing video data comprising a processor and a non-transitory memory with instructions thereon, wherein the instructions upon execution by the processor, cause the processor to:
receive a bitstream that signals video decoder initialization information containing a range of initialization parameters; and
perform a conversion between a visual media data and a visual media data file based on the range of initialization parameters;
wherein the apparatus is a decoder, and wherein the decoder is reinitialized when at least one of a general timing parameter and a hypothetical reference decoder (HRD) parameter is changed.
19. A non-transitory computer readable medium storing instructions that cause a processor to:
receive a bitstream that signals video decoder initialization information containing a range of initialization parameters; and
perform a conversion between a visual media data and a visual media data file based on the range of initialization parameters;
wherein the processor operates on a decoder, and wherein the decoder is reinitialized when at least one of a general timing parameter and a hypothetical reference decoder (HRD) parameter is changed.