Learn More
In the new video coding standard H.264/AVC, motion estimation (ME) is allowed to search multiple reference frames. Therefore, the required computation is highly increased, and it is in proportion to the number of searched reference frames. However, the reduction in prediction residues is mostly dependent on the nature of sequences, not on the number of(More)
An efficient moving object segmentation algorithm suitable for real-time content-based multimedia communication systems is proposed in this paper. First, a background registration technique is used to construct a reliable background image from the accumulated frame difference information. The moving object region is then separated from the background region(More)
An H.264/AVC encoder [1] saves 25% to 45% and 50% to 70% of bit rates when compared with MPEG4 and MPEG2, respectively. New features include /4-pixel motion estimation (ME) with multiple reference frames (MRF) and variable block sizes (VBS), intra prediction, context-based adaptive variable length coding, deblocking, rate-distortion optimized mode decision,(More)
Mathematical morphology operations are applied in many real-time applications, such as video segmentation. For real-time requirement, efficient hardware implementation is necessary. This paper proposes a new architecture named Partial-Result-Reuse (PRR) architecture for mathematical morphological operations with flat structuring elements. Partial results(More)
Automatic video segmentation plays an important role in real-time MPEG-4 encoding systems. Several video segmentation algorithms have been proposed; however, most of them are not suitable for real-time applications because of high computation load and many parameters needed to be set in advance. This paper presents a fast video segmentation algorithm for(More)
This paper describes an efficient motion-estimation algorithm, the predictive line search (PLS), for real-time implementations of MPEG-4 encoder on multimedia processors. The motion-vector predictor is used as the starting point in the search process because the correlation between neighboring motion vectors is strong. The line search pattern is used in the(More)
In the new video coding standard, MPEG-4 AVC/JVT/H.264, motion estimation is allowed to use multiple reference frames. The reference software adopts full search scheme, and the increased computation is in proportion to the number of searched reference frames. However, the reduction of prediction residues is highly dependent on the nature of sequences, not(More)
Video segmentation is a key operation in MPEG-4 content-based coding systems. For real-time applications, hardware implementation of video segmentation is inevitable. In this paper, we propose a hybrid morphology processing unit architecture for real-time moving object segmentation systems, where a prior effective moving object segmentation algorithm is(More)
A fast watershed based video segmentation algorithm is proposed in this paper. Watershed based video segmentation algorithms are the mainstream because of high subjective quality; however, they are too computational intensive for real-time applications. Combining prior fast segmentation algorithm, which is based on change detection and background(More)