کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
865427 1470867 2009 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Whole Frame Error Concealment with Refined Motion Extrapolation and Prescription at Encoder for H.264/AVC
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی (عمومی)
پیش نمایش صفحه اول مقاله
Whole Frame Error Concealment with Refined Motion Extrapolation and Prescription at Encoder for H.264/AVC
چکیده انگلیسی
Packet losses usually result in frame losses in low bit rate video streaming over error prone networks. The whole frame error concealment (EC) algorithm is then necessary for the decoder to improve the video quality. A refined bidirectional motion vector extrapolation was developed to improve the motion vector estimation precision by alleviating the effect of overlapped and hole regions with an adaptive overlapped block motion compensation to reduce block artifacts. A prescription-based framework was then developed to improve the error concealment at the encoder side. Simulations show that the EC algorithm at the decoder side outperforms the existing methods by 2-8 dB. Moreover, the prescription-based framework at the encoder side provides further peak signal to noise ratio improvement.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Tsinghua Science & Technology - Volume 14, Issue 6, December 2009, Pages 691-697
نویسندگان
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