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Methods and apparatus to facilitate enhancing the quality of video

專利號
US10841549B2
公開日期
2020-11-17
申請人
QUALCOMM Incorporated(US CA San Diego)
發(fā)明人
Reza Pourreza Shahri; Amirhossein Habibian; Taco Sebastiaan Cohen
IPC分類
H04N5/21; H04N9/64; G06T5/00; G06T3/00; H04N9/79
技術領域
frame,xt,noisy,may,content,yt,enhanced,frames,or,decoded
地域: CA CA San Diego

摘要

The present disclosure relates to methods and devices for facilitating enhancing the quality of video. An example method disclosed herein includes estimating an optical flow between a first noisy frame and a second noisy frame, the second noisy frame following the first noisy frame. The example method also includes warping a first enhanced frame to align with the second noisy frame, the warping being based on the estimation of the optical flow between the first noisy frame and the second noisy frame, the first enhanced frame being an enhanced frame of the first noisy frame. The example method also includes generating a second enhanced frame based on the warped first enhanced frame and the second noisy frame, and outputting the second enhanced frame.

說明書

It should be appreciated that the apparatus and/or the process 200 may operate on a compressed video. For example, the apparatus may receive a compressed video and then the content decoder 122 of FIG. 1 may decode frames of the compressed video. The apparatus may then process the decoded frames to facilitate enhancing the quality of the video. For example, the device 100, the processing unit 120 and/or the video enhancer 198 may utilize spatial information and temporal information for facilitating video quality enhancement. Accordingly, the techniques disclosed herein may be computationally efficient as they process one frame at a time (e.g., the previous frame is used for optical flow estimation and may be accessed via a frame buffer). Additionally, the feedback from the output may enable the techniques disclosed herein to have increased temporal memory about past frames compared to multi-frame approaches that have no temporal memory and/or limited temporal memory. For example, the process 200 may align the previously enhanced frame (Yt?1) 234 based on the optical flow 212 associated with the current decoded frame (Xt) 202 to enhance the current decoded frame (Xt) 202. The feedback also may enable an output frame sequence with improved consistency. For example, the enhancements applied to the previous frame may be used while processing the current frame. The reuse of information reduces the likelihood of flicker in the enhanced video.

權利要求

1
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