Systems, methods and apparatus for processing image data are described. One example method includes performing a conversion between a visual media file and a bitstream. The visual media file comprises a sequence of one or more pictures according to a media file format, and the bitstream comprises one or more access units according to a video coding format. The bitstream is coded according to the video coding format. The media file format specifies that an image item of a specific type value in the visual media file includes a single access unit of the bitstream. The single access unit is either an Intra Random Access Picture (IRAP) access unit or a Gradual Decoding Refresh (GDR) access unit according to the video coding format. All pictures in the GDR access unit are identified as a recovery point in the bitstream.

Systems, methods and apparatus for processing image data are described. One example method includes performing a conversion between a visual media file and a bitstream. The visual media file comprises a sequence of one or more pictures according to a media file format, and the bitstream comprises one or more access units according to a video coding format. The bitstream is coded according to the video coding format. The media file format specifies that an image item of a specific type value in the visual media file includes a single access unit of the bitstream. The single access unit is either an Intra Random Access Picture (IRAP) access unit or a Gradual Decoding Refresh (GDR) access unit according to the video coding format. All pictures in the GDR access unit are identified as a recovery point in the bitstream.

Systems, methods and apparatus for processing image data are described. One example method includes performing a conversion between a visual media file and a bitstream. The visual media file comprises image items each comprising a sequence of one or more pictures according to a media file format, and the bitstream includes access units each consisting of one or more pictures each belonging to a layer according to a video coding format. The media file format specifies that image items comprising pictures originated from the bitstream are allowed to be associated with different instances of a property descriptor that indicates high-level characteristics of the bitstream.

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.

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.

Various aspects of the subject technology relate to systems, methods, and machine-readable media for recovering lost information in a data stream. The method includes receiving the data stream having consecutive frames from a server, each frame encoded based on information from a preceding frame in an encoding order as reference. The method also includes detecting an error in the data stream. The method also includes sending an error message to the server regarding the error. The method also includes receiving a corrected frame encoded based on a distant reference frame that was received prior to detection of the error. The method also includes decoding the corrected frame.

Various aspects of the subject technology relate to systems, methods, and machine-readable media for recovering lost information in a data stream. The method includes receiving the data stream having consecutive frames from a server, each frame encoded based on information from a preceding frame in an encoding order as reference. The method also includes detecting an error in the data stream. The method also includes sending an error message to the server regarding the error. The method also includes receiving a corrected frame encoded based on a distant reference frame that was received prior to detection of the error. The method also includes decoding the corrected frame.

Various systems and methods for implementing tiered access to regions of interest in video frames are described herein. A system for implementing tiered access to regions of interest in video frames, comprising: a memory device to store a mapping table, the mapping table to store a correspondence between a protection level and a consumer; video processing circuitry to: compress a video stream using a lossless video compression standard, the video stream comprising a plurality of frames, each frame comprising a plurality of image blocks; and encrypt each block in each frame of the video stream using an encryption key; and inference circuitry to: use an object detection and classification process on the video stream to identify an object in the video stream; access a policy store to determine a corresponding protection level for the object; and store the corresponding protection level in lossless video compression metadata.

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.

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.