In this paper, a wavelet-based spatially scalable video coding scheme with in-band prediction is investigated in combination with JPEG 2000 quantization and arithmetic coding. The wavelet decomposition of each frame of the video data is succeeded by the computation of a blockwise motion compensated prediction for the individual subbands. To achieve half-pixel motion vector accuracy the shift-in...

The reliable transmission of Federal Standard CELP 1016 encoded speech over very noisy communication channels is investigated. First, the interframe and intraframe redundancy present in the CELP 1016 parameters is quanti ed using second-order Markov chains. It is shown that over one-quarter of the CELP bits in every frame of speech are redundant. An unequal error protection (UEP) coding scheme,...

1047-3203/$ see front matter 2011 Elsevier Inc. A doi:10.1016/j.jvcir.2011.10.007 ⇑ Corresponding author. E-mail address: [email protected] (K.-C. Ch In this paper, we propose an architecture for H.264/AVC fast intra-prediction-mode decision making in high resolution real-time applications. Intra-prediction-mode decision making requires many computations of H.264/AVC video coding, and al...

In this paper, an improved low complexity algorithm for 3D-HEVC is proposed to reduce the computational complexity. The basic idea of the method is to utilize the boundary homogeneity of texture and depth map which is generated by Laplacian filter. Firstly, based on the evaluation result of the boundary homogeneity, an early coding unit (CU) decision method is proposed to achieve the low comput...

The new High Efficiency Video Coding (HEVC) standard achieves higher encoding efficiency when compared to its predecessors such as H.264/AVC. One of the factors responsible for this improvement is the new intra prediction method, which introduces a larger number of prediction directions resulting in an enhanced rate-distortion (RD) performance obtained at the cost of higher computational comple...

The emerging H.264 video coding standard is able to achieve remarkable video quality using a number of new, but compute-intensive, video coding techniques. One of these new techniques is intra-frame coding, in which the blocks or macroblock in an intra-coded macroblock can be predicted from previously coded blocks/macroblocks, so that only their difference information needs to be encoded. Since...

A new mode selection method for intra-block coding in the H.264/MPEG-4 part 10 video-coding standard is proposed. There are nine 4 4 and four 16 16 intra-prediction modes for intra-block coding. Thus, to find the best intra-block coding mode for a 16 16 macroblock, all of the 144 (16 9) 4 4 and four 16 16 intra-modes need to be exhaustively computed and evaluated. We propose a context-based int...

STUDY OBJECTIVE We validate the accuracy of a previously derived clinical prediction rule for the identification of children with intra-abdominal injuries after blunt torso trauma. METHODS We conducted a prospective observational study of children with blunt torso trauma who were evaluated for intra-abdominal injury with abdominal computed tomography (CT), diagnostic laparoscopy, or laparotom...