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This paper presents a motion compensated frame interpolation (MCFI) scheme for high-definition (HD) video applications. The proposed algorithm uses only two successive frames, and the motion candidates are selected from the spatia...
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This paper presents a motion compensated frame interpolation (MCFI) scheme for high-definition (HD) video applications. The proposed algorithm uses only two successive frames, and the motion candidates are selected from the spatial and temporal domains. The scheme includes the following four steps. Firstly, forward and backward motion fields are estimated. Secondly, the motion vector fields are projected to the interpolated frames by our new retiming method based on median filter. Thirdly, a geometric based occlusion detection algorithm is applied to find the covered and uncovered regions in the interpolated frame for unidirectional interpolation. Finally, new frames are generated by unidirectional and bi-directional interpolation to reduce the halo artifacts. Experimental results demonstrate that the proposed algorithm achieves much better visual quality than the traditional methods.
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摘要 :
This paper presents a motion compensated frame interpolation (MCFI) scheme for high-definition (HD) video applications. The proposed algorithm uses only two successive frames, and the motion candidates are selected from the spatia...
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This paper presents a motion compensated frame interpolation (MCFI) scheme for high-definition (HD) video applications. The proposed algorithm uses only two successive frames, and the motion candidates are selected from the spatial and temporal domains. The scheme includes the following four steps. Firstly, forward and backward motion fields are estimated. Secondly, the motion vector fields are projected to the interpolated frames by our new retiming method based on median filter. Thirdly, a geometric based occlusion detection algorithm is applied to find the covered and uncovered regions in the interpolated frame for unidirectional interpolation. Finally, new frames are generated by unidirectional and bi-directional interpolation to reduce the halo artifacts. Experimental results demonstrate that the proposed algorithm achieves much better visual quality than the traditional methods.
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This paper proposes a motion estimation technique to improve accuracy and coherence of motion vectors estimated by the standard block matching technique. The proposed technique is based on a matching block integration using a reli...
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This paper proposes a motion estimation technique to improve accuracy and coherence of motion vectors estimated by the standard block matching technique. The proposed technique is based on a matching block integration using a reliability metric of motion vectors. First, the reliability metric is computed for all the matching blocks in the target image and then, based on this value and its dependency on the direction, four neighboring matching blocks are checked whether they should be integrated or not. Finally, motion vectors are estimated for the integrated matching blocks by the block matching technique. Since the block integration is performed only for flat matching blocks or those with a simple edge, the coherence is improved while the performance of motion compensation is kept as far as possible. The examples given show the effectiveness of the proposed approach.
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This paper presents a unified systolic architecture for inter and intra predictions in H.264/AVC decoder. To increase hardware utilization and minimize cost, we combine inter and intra predictions by a reprogrammable FIR filter, w...
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This paper presents a unified systolic architecture for inter and intra predictions in H.264/AVC decoder. To increase hardware utilization and minimize cost, we combine inter and intra predictions by a reprogrammable FIR filter, which is further implemented using systolic array. For intra prediction, the boundary pixels are reshuffled before feeding into the systolic array. For inter prediction, the 2-D interpolation is conducted through separable 1-D filtering. As compared with the state-of-the-art approaches, our architecture provides higher performance while maintaining relatively lower cost and input bandwidth. Specifically, up to 4x throughput improvement has been achieved. Moreover, the input bandwidth is significantly reduced. Further, combining inter and intra predictions saves the cost by 22~88%.
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摘要 :
This paper presents a unified systolic architecture for inter and intra predictions in H.264/AVC decoder. To increase hardware utilization and minimize cost, we combine inter and intra predictions by a reprogrammable FIR filter, w...
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This paper presents a unified systolic architecture for inter and intra predictions in H.264/AVC decoder. To increase hardware utilization and minimize cost, we combine inter and intra predictions by a reprogrammable FIR filter, which is further implemented using systolic array. For intra prediction, the boundary pixels are reshuffled before feeding into the systolic array. For inter prediction, the 2-D interpolation is conducted through separable 1-D filtering. As compared with the state-of-the-art approaches, our architecture provides higher performance while maintaining relatively lower cost and input bandwidth. Specifically, up to 4x throughput improvement has been achieved. Moreover, the input bandwidth is significantly reduced. Further, combining inter and intra predictions saves the cost by 22~88%.
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We propose a simplified motion estimation method which provides motion vectors for all types of motion compensation used in MPEG-2. The method is a result of applying a newly introduced approximation to the canonical three-step me...
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We propose a simplified motion estimation method which provides motion vectors for all types of motion compensation used in MPEG-2. The method is a result of applying a newly introduced approximation to the canonical three-step method described in the MPEG-2 Test Model. It reduces the number of necessary computations in the second and the third steps to less than 1%, and that of data transfers to about 8% of the canonical method. Total complexity of the proposed method is nearly that of the full-pel search motion estimation.
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A new block based motion estimation and compensation technique named overlapped multi-resolution motion compensation (OMRMC) is proposed. The algorithm employs the overlapped block motion compensation (OBMC) algorithm in wavelet d...
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A new block based motion estimation and compensation technique named overlapped multi-resolution motion compensation (OMRMC) is proposed. The algorithm employs the overlapped block motion compensation (OBMC) algorithm in wavelet domain to reduce the blocky artifacts in the predicted frames using the multi-resolution motion estimation (MRME) technique. Simulation results showed the use of OMRMC reduced up to 26percent of the displaced frame difference (DFD) energy compared with MRME.
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摘要 :
A new block based motion estimation and compensation technique named overlapped multi-resolution motion compensation (OMRMC) is proposed. The algorithm employs the overlapped block motion compensation (OBMC) algorithm in wavelet d...
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A new block based motion estimation and compensation technique named overlapped multi-resolution motion compensation (OMRMC) is proposed. The algorithm employs the overlapped block motion compensation (OBMC) algorithm in wavelet domain to reduce the blocky artifacts in the predicted frames using the multi-resolution motion estimation (MRME) technique. Simulation results showed the use of OMRMC reduced up to 26percent of the displaced frame difference (DFD) energy compared with MRME.
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A novel motion compensated temporal filtering (MCTF) scheme is proposed in this paper by properly using forward and backward motion compensations. The mean, the second moment and the maximum value for the temporal distance of all ...
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A novel motion compensated temporal filtering (MCTF) scheme is proposed in this paper by properly using forward and backward motion compensations. The mean, the second moment and the maximum value for the temporal distance of all motion compensation pairs (MCPs) in a group of frames (GOF) are minimized such that the number of "unconnected" pixels is minimized. The overall coding efficiency is improved by up to 1.5 dB when compared to the scheme provided in [?] while the total number of motion estimation remains the same.
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摘要 :
A novel motion compensated temporal filtering (MCTF) scheme is proposed in this paper by properly using forward and backward motion compensations. The mean, the second moment and the maximum value for the temporal distance of all ...
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A novel motion compensated temporal filtering (MCTF) scheme is proposed in this paper by properly using forward and backward motion compensations. The mean, the second moment and the maximum value for the temporal distance of all motion compensation pairs (MCPs) in a group of frames (GOF) are minimized such that the number of "unconnected" pixels is minimized. The overall coding efficiency is improved by up to 1.5 dB when compared to the scheme provided in [?] while the total number of motion estimation remains the same.
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