کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
529252 869640 2006 12 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
FGS enhancement layer truncation with reduced intra-frame quality variation
موضوعات مرتبط
مهندسی و علوم پایه مهندسی کامپیوتر چشم انداز کامپیوتر و تشخیص الگو
پیش نمایش صفحه اول مقاله
FGS enhancement layer truncation with reduced intra-frame quality variation
چکیده انگلیسی

This paper presents a rate-distortion optimized MPEG-4 FGS enhancement-layer truncation scheme. Our objective is to minimize the quality variation within each frame when the last transmitted enhancement layer is truncated according to the available network bandwidth. By properly redistributing the bit-budget to the enhancement layer that will be truncated, we can raise the quality of the whole frame uniformly. To achieve this goal, we use a trellis-search approach to decide which “1” bits will be truncated from the enhancement layer for each block. An operational rate-distortion optimization scheme based on the Lagrange Multiplier algorithm is adopted to decide the truncation criteria. Our proposed method can improve the visual quality and reduce the intra-frame quality variation both subjectively and objectively. Compared to previously reported straightforward truncation methods, our approach reduces the intra-frame quality variation significantly, and the decoded visual quality in terms of PSNR is also improved.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Visual Communication and Image Representation - Volume 17, Issue 4, August 2006, Pages 830–841
نویسندگان
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