公开(公告)号：US11405617B1

公开(公告)日：2022-08-02

申请号：US16880542

申请日：2020-05-21

Applicant: Xilinx, Inc.

Inventor： Akrum Elkhazin

IPC: H04N19/13 ,  G06F17/18 ,  H04N19/172 ,  H04N19/146

Abstract: Methods and systems for improving encoding of a picture or a frame are disclosed. According to one embodiment, a method for encoding video frames includes receiving for a frame, several binarized symbols that include a number of bins corresponding to one or more contexts. For each context from one or more contexts, the method includes entropy encoding in a first pass bins associated with the context using an initial probability distribution for the context; generating counts of zeros and ones in a set of bins associated with the context; updating the initial probability distribution using the respective counts of zeros and ones, to obtain an updated probability distribution; and entropy encoding in a second pass the bins associated with the context using the updated probability distribution, to provide at least a part of an encoded bitstream.

公开(公告)号：US11330258B1

公开(公告)日：2022-05-10

申请号：US16880745

申请日：2020-05-21

Applicant: Xilinx, Inc.

Inventor： Akrum Elkhazin

IPC: H04N7/12 ,  H04N19/115 ,  H04N19/176 ,  H04N19/122 ,  H04N19/146

Abstract: Methods and systems for adjusting bit usage during encoding of the image blocks of a picture or a frame are disclosed. According to one embodiment, a method is provided for adjusting bit usage in video compression. The method includes obtaining an estimated bit or byte size of an image block of a video frame, and determining whether the estimated size is less than a first selected threshold. An adjustment to a quantization parameter (QP) is selected based on the determination, so that the actual bit/byte size of the block may be adjusted according to a target size.