M
Marta Karczewicz
Researcher at Qualcomm
Publications - 1066
Citations - 22516
Marta Karczewicz is an academic researcher from Qualcomm. The author has contributed to research in topics: Motion vector & Video decoder. The author has an hindex of 64, co-authored 1065 publications receiving 22017 citations. Previous affiliations of Marta Karczewicz include Nokia.
Papers
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Journal ArticleDOI
Adaptive deblocking filter
TL;DR: The adaptive deblocking filter used in the H.264/MPEG-4 AVC video coding standard performs simple operations to detect and analyze artifacts on coded block boundaries and attenuates those by applying a selected filter.
Journal ArticleDOI
Low-complexity transform and quantization in H.264/AVC
TL;DR: The 4/spl times/4 transforms in H.264 can be computed exactly in integer arithmetic, thus avoiding inverse transform mismatch problems and minimizing computational complexity, especially for low-end processors.
Journal ArticleDOI
The SP- and SI-frames design for H.264/AVC
Marta Karczewicz,R. Kurceren +1 more
TL;DR: It is shown that SP-frames have significantly better coding efficiency than I-frames while providing similar functionalities.
Patent
Video coding with large macroblocks
TL;DR: In this article, a video encoder is configured to encode a coded unit comprising a plurality of video blocks, wherein at least one of the video blocks comprises a size of more than 16×16 pixels.
Proceedings ArticleDOI
Improved h.264 intra coding based on bi-directional intra prediction, directional transform, and adaptive coefficient scanning
Yan Ye,Marta Karczewicz +1 more
TL;DR: Together the improvements can bring on average 7% and 10% coding gain for CABAC and for CAVLC, respectively, with average coding gain of 12% for HD sequences.