A method of deriving a motion vector difference for coding video data, the method comprises determining whether inter-layer prediction is utilized by determining whether both a reference picture in a first reference picture list is not marked as used for long-term reference and a reference picture in a second reference picture list is not marked as used for long-term reference; based on whether the inter-layer prediction is utilized, setting a scaling factor to one of: a value of 1 in a case where the inter-layer prediction is utilized; or a value in the range of −4096 to 4095 in a case where the inter-layer prediction is not utilized; and deriving the motion vector difference based on the scaling factor.

According to an embodiment, an encoder is configured to ensure that for each long-term picture of a reference picture set (RPS) of a picture i, the value of a flag referred to as delta_poc_msb_present_flag[i] is equal to 1 when there is at least two reference pictures in a decoded picture buffer DPB) with least significant bits (lsbs) of the picture order count (POC) referred to as pic_order_cnt_lsb equal to the lsbs of the respective long-term picture i, denoted POC lsbLt[i]. When the delta_poc_msb_present_flag is equal to 1, the long-term picture is indicated by the full POC.

According to an embodiment, an encoder is configured to ensure that for each long-term picture of a reference picture set (RPS) of a picture i, the value of a flag referred to as delta_poc_msb_present_flag[i] is equal to 1 when there is at least two reference pictures in a decoded picture buffer DPB) with least significant bits (lsbs) of the picture order count (POC) referred to as pic_order_cnt_lsb equal to the lsbs of the respective long-term picture i, denoted POC lsbLt[i]. When the delta_poc_msb_present_flag is equal to 1, the long-term picture is indicated by the full POC.

According to an embodiment disclosed in the present document, it is possible to derive a history-based motion vector prediction (HMVP) buffer for a current block based on a history, and to derive motion information of the current block based on an HMVP candidate included in the HMVP buffer, thereby increasing inter prediction efficiency.

A computer device receives a signaling file corresponding to a multimedia resource. The signaling file includes descriptors corresponding to a plurality of track data of the multimedia resource, respectively. Dependency identifiers included in the descriptors correspond to the main bitstream track data pointing to descriptors corresponding to the library picture track data. The computer device parses the signaling file and determines a dependency relationship between the main bitstream track data and the library picture track data according to the dependency identifiers. The computer device sequentially acquires the library picture track data and the main bitstream track data from a data source side according to the dependency relationship.

An apparatus for coding video information according to certain aspects includes a memory and a processor. The memory unit is configured to store video information associated with an enhancement layer (EL) and a corresponding reference layer (RL). The processor is configured to: code an EL picture in a current access unit (AU), the EL coded using a first standard that is different from a second standard that is used to code the RL, wherein the coding of the EL picture is based on information associated with a RL picture in the current access unit, the information associated with the RL picture provided by an external means and consisting of: (1) decoded sample values of the RL picture; (2) a representation format of the RL picture; and (3) an indication of whether the RL picture is an instantaneous decoding refresh (IDR) picture.

An apparatus for coding video information according to certain aspects includes a memory and a processor. The memory unit is configured to store video information associated with an enhancement layer (EL) and a corresponding reference layer (RL). The processor is configured to: code an EL picture in a current access unit (AU), the EL coded using a first standard that is different from a second standard that is used to code the RL, wherein the coding of the EL picture is based on information associated with a RL picture in the current access unit, the information associated with the RL picture provided by an external means and consisting of: (1) decoded sample values of the RL picture; (2) a representation format of the RL picture; and (3) an indication of whether the RL picture is an instantaneous decoding refresh (IDR) picture.

The present embodiments introduce a new type of random access point in video bitstreams that can be used for random access operations but can be represented in encoded form at a lower bit cost as compared to IRAP pictures. The random access point is a dependent random access point (DRAP) picture that is encoded and decoded as a temporal predictive picture using an IRAP picture and/or a previous, according to a decoding order, DRAP picture as sole reference picture(s) for the DRAP picture. The DRAP picture constitutes a random access point in a video bitstream.

The present embodiments introduce a new type of random access point in video bitstreams that can be used for random access operations but can be represented in encoded form at a lower bit cost as compared to IRAP pictures. The random access point is a dependent random access point (DRAP) picture that is encoded and decoded as a temporal predictive picture using an IRAP picture and/or a previous, according to a decoding order, DRAP picture as sole reference picture(s) for the DRAP picture. The DRAP picture constitutes a random access point in a video bitstream.

A method and apparatus for video processing on a data storage device. A chip bound architecture includes a CMOS coupled to one or more NAND die, the CMOS including one or more processors, memories, and error correction code (ECC) engines capable of processing video data. According to certain embodiments, macroblocks are correlated between two I-frames, including motion vectors to define different locations of correlated macroblocks. A P-frame may be determined from a previous I-frame and its correlated macroblocks and motion vectors, while a B-frame may be determined from two or more adjacent I-frames with concomitant macroblocks and motion vectors, as well as P-frames associated with an adjacent I-frame.