Invention Application
US20160360219A1 PREVENTING I-FRAME POPPING IN VIDEO ENCODING AND DECODING
审中-公开
在视频编码和解码中防止I-FRAME POPPING
- Patent Title: PREVENTING I-FRAME POPPING IN VIDEO ENCODING AND DECODING
- Patent Title (中): 在视频编码和解码中防止I-FRAME POPPING
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Application No.: US14732615Application Date: 2015-06-05
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Publication No.: US20160360219A1Publication Date: 2016-12-08
- Inventor: Feng Yi , Yeping Su , Chris Y. Chung , Hsi-Jung Wu , Xiaosong Zhou
- Applicant: Apple Inc.
- Main IPC: H04N19/50
- IPC: H04N19/50 ; H04N19/61

Abstract:
Methods and systems provide video compression to reduce a “popping” effect caused by differences in quality between a refresh frame (e.g., I-frame or IDR-frame) and neighboring frame(s). In an embodiment, a quality of a pre-definable number of frames preceding a refresh frame (“preceding frames”) may be increased. A quantization parameter may be decreased for a region within at least one of the preceding frame(s). In an embodiment, preceding frames may be coded according to an open group of pictures (“GOP”) structure. In an embodiment, a refresh frame may be first coded as a P-frame, then coded based on the coded P-frame. In an embodiment, preceding frames may be first coded based on the refresh frame, then coded based on the coded frames without referencing the refresh frame. Each of these methods may increase consistency of quality in a sequence of frames, and, correspondingly, minimize or remove I-frame popping.
Information query