公开(公告)号：US10412388B2

公开(公告)日：2019-09-10

申请号：US15864843

申请日：2018-01-08

Applicant: Citrix Systems, Inc.

Inventor： Miguel Melnyk ,  Andrew Penner ,  Jeremy Tidemann

IPC: H04N19/124 ,  H04N19/172 ,  H04N19/46 ,  H04N19/152 ,  H04N19/154 ,  H04N19/40

Abstract: A computer-implemented method includes receiving an encoded video frame, decompressing the received encoded video frame, extracting a first quantization parameter (QP) from the decompressed video frame, and acquiring a delta QP based on the first QP. The method also includes acquiring a second QP based on the delta QP and the first QP, compressing the decompressed video frame based on the second QP, and providing the compressed video frame. The first QP corresponds to quantization settings originally used for compressing the encoded video frame. And the second QP corresponds to quantization settings for compressing the decompressed video frame.

公开(公告)号：US20180131937A1

公开(公告)日：2018-05-10

申请号：US15864843

申请日：2018-01-08

Applicant: Citrix Systems, Inc.

Inventor： Miguel Melnyk ,  Andrew Penner ,  Jeremy Tidemann

IPC: H04N19/124 ,  H04N19/40 ,  H04N19/154 ,  H04N19/172 ,  H04N19/46 ,  H04N19/152

CPC classification number: H04N19/124 ,  H04N19/152 ,  H04N19/154 ,  H04N19/172 ,  H04N19/40 ,  H04N19/46

Abstract: A computer-implemented method includes receiving an encoded video frame, decompressing the received encoded video frame, extracting a first quantization parameter (QP) from the decompressed video frame, and acquiring a delta QP based on the first QP. The method also includes acquiring a second QP based on the delta QP and the first QP, compressing the decompressed video frame based on the second QP, and providing the compressed video frame. The first QP corresponds to quantization settings originally used for compressing the encoded video frame. And the second QP corresponds to quantization settings for compressing the decompressed video frame.

公开(公告)号：US10123015B2

公开(公告)日：2018-11-06

申请号：US15482931

申请日：2017-04-10

Applicant: Citrix Systems, Inc.

Inventor： Jeremy Tidemann ,  Andrew Penner

IPC: H04N19/124 ,  H04N19/115 ,  H04N19/176 ,  H04N19/136 ,  H04N19/146 ,  H04N19/154 ,  H04N19/40 ,  H04N19/172 ,  H04N19/182 ,  H04N19/184

Abstract: A method of optimizing an encoded video stream comprising one or more video frames, each video frame comprising a plurality of macroblocks, each macroblock comprising a plurality of pixels. The method includes receiving an encoded macroblock, decoding the encoded macroblock, and extracting a first quantization parameter. The first quantization parameter corresponds to quantization settings originally used for compressing the encoded macroblock. The method also includes computing a second quantization parameter based at least in part on the first quantization parameter, re-encoding the decoded macroblock based on the second quantization parameter, and providing the re-encoded macroblock.