公开(公告)号：US10045038B2

公开(公告)日：2018-08-07

申请号：US15574253

申请日：2016-05-26

Applicant: HFI Innovation Inc.

Inventor： Shan Liu ,  Xiaozhong Xu ,  Chenghao Liu

IPC: H04N7/12 ,  H04N19/433 ,  H04N19/51 ,  H04N19/172 ,  H04N19/159 ,  H04N19/105 ,  H04B1/66 ,  H04N19/70

Abstract: Methods and apparatus of managing decoded picture buffer for a video coding system are disclosed for a system using an Inter prediction mode and an Intra Block Copy mode. According to one method, a current-picture-usage flag in a picture or slice level is determined. If the current-picture-usage flag indicates that the current picture is not allowed to be used as the reference picture for the current picture, only one picture buffer is allocated in a DPB (decoded picture buffer) for the current picture and a reconstructed current picture after in-loop filtering is stored in the picture buffer in the DPB. According to another method, the system allocates only one picture buffer in the DPB for both the Inter prediction mode and the Intra Block Copy mode of the current picture if all of one or more in-loop filters are disabled for the entire part of the current picture.

公开(公告)号：US10587881B2

公开(公告)日：2020-03-10

申请号：US15577237

申请日：2016-05-27

Applicant: HFI Innovation Inc.

Inventor： Xiaozhong Xu ,  Shan Liu ,  Chenghao Liu

IPC: H04N19/159 ,  H04N19/172 ,  H04N19/82 ,  H04N19/573 ,  H04N19/58 ,  H04N19/117 ,  H04N19/70 ,  H04N19/433 ,  H04N19/107 ,  H04N19/176 ,  H04N19/152 ,  H04N19/423

Abstract: Methods and Apparatus of managing decoded picture buffer for a video decoding system using Intra Block Copy (IBC) mode. In one embodiment, one or more previously reconstructed pictures after in-loop filtering are stored in a DPB (decoded picture buffer). For decoding a current picture, a first and a second picture buffers are allocated in the DPB. Both unfiltered version and filtered version of reconstructed current picture are stored in the first and second picture buffers. After the current picture is decoded, the unfiltered version is removed from the DPB. In another embodiment, an unfiltered version and filtered version of reconstructed current picture are stored. One of them is stored in the DPB and the other is stored in a temporary buffer. After the current picture is decoded, the unfiltered version is removed from the DPB or the temporary buffer.