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Antti Hallapuro
Researcher at Nokia
Publications - 43
Citations - 2793
Antti Hallapuro is an academic researcher from Nokia. The author has contributed to research in topics: Coding tree unit & Encoder. The author has an hindex of 21, co-authored 43 publications receiving 2743 citations.
Papers
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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
H.264/AVC baseline profile decoder complexity analysis
TL;DR: This work study and analyze the computational complexity of a software-based H.264/AVC (advanced video codec) baseline profile decoder, determining the number of basic computational operations required by a decoder to perform the key decoding subfunctions and evaluating the dependence of the time complexity of each of the major decoder sub functions on encoder characteristics, content, resolution and bit rate.
Journal ArticleDOI
Comparative Rate-Distortion-Complexity Analysis of HEVC and AVC Video Codecs
TL;DR: The rate-distortion-complexity of High Efficiency Video Coding (HEVC) reference video codec (HM) and compares the results with AVC reference codec (JM) is analyzed and the bottlenecks of HM codec are revealed and implementation guidelines for future real-time HEVC codecs are provided.
Patent
Method for sub-pixel value interpolation
Marta Karczewicz,Antti Hallapuro +1 more
TL;DR: In this article, the authors propose a method of interpolation in video coding in which an image comprising pixels arranged in rows and columns and represented by values having a specified dynamic range is interpolated to generate values for sub-pixels at fractional horizontal and vertical locations.
Patent
Combined motion vector and reference index prediction for video coding
TL;DR: In this paper, a list of motion vector predictor candidates is arranged according to predefined rules and each motion vector also has a reference index associated with it, and one of the candidates is then selected as a predictor based on predefined rule, or the selection is explicitly signaled in the bitstream.