Mingjing Ai

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A real-time transmission strategy that adapts network conditions rapidly is brought forward, and it is applied to H.264 encoding standard. Firstly, the strategy forecasts initial network bandwidth using bi-search algorithm, and establishes a dropout rate-smoothing model. In addition, it adopts the AIMD algorithm to adjust the sending bit rates, and then(More)
The error concealment(EC) method for video transmission over wireless network recommended by H.264 cannot reconstruct the corrupted image effectively, which was caused partly by the inaccurate predicted motion vector(MV). Thus a temporal error concealment(TEC) method based on weighted motion vectors of double candidate blocks in the previous frame is(More)
Slice-parallel video coding with a fixed number of slices and uniformly allocated coding regions would cause extra waiting time among slice threads, especially when the encoding machine is also busy running other applications. In this paper, we propose to adaptively decide the number of slices before encoding each frame by computing the expected value of(More)
RGB color signals encoding is more desirable for high resolution and accurate definition for saturations and hue. This paper presents a region adaptive inter-color prediction scheme for 4:4:4 RGB signals, which treats G component as a primary component and predicts B/R component from G component with different weighting factors based on different texture(More)
Real-time and realistic physics-based simulation of deformable objects is of great value to medical intervention, training, and planning in virtual environments. This paper advocates a virtual-reality (VR) approach to minimally-invasive surgery/therapy (e.g., percutaneous coronary intervention) in medical procedures. In particular, we devise a robust and(More)
In this paper, a fast mode decision algorithm for multi-view video coding (MVC) is proposed. When implementing MVC, one of the most critical problems is heavy computational complexity caused by the large amount of information in multi-view sequences. Hence, a fast algorithm is essential. To reduce computational complexity, a fast mode decision using both(More)
A novel inter coding framework for H.264/AVC is proposed to reduce the computational complexity of H.264 encoder on DSP platform. In this paper, inter coding for one P slice is separated into five consecutive loops: Motion Estimation Loop, Transform & Quantization Loop, Entropy Coding Loop, Deblocking Loop and Interpolation Loop. All the macroblocks(More)
Rate control aims to maximize reconstructed video quality while adapting coding bit rate to the fluctuating network bandwidth. This paper proposes an easy rate control algorithm for H.264 video coding based on a novel ρ-q/Distortion model, whose data line shows quite a pleasing goodness-of-fit. Experimental results have demonstrated that, compared(More)