Current multi-view video coding （mvc） reference model in joint video team （JVT） does not provide efficient rate control schemes. This paper presents a rate control algorithm for mvc by improving the quadratic rate...
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Current multi-view video coding （mvc） reference model in joint video team （JVT） does not provide efficient rate control schemes. This paper presents a rate control algorithm for mvc by improving the quadratic rate-distortion （R-D） model. We reasonably allocate bit-rate among views based on the correlation analysisl The proposed algorithm consists of three levels to control the rate bits more accurately, of which the frame layer allocates bits according to the frame complexity and the temporal activity. Extensive experiments show that the proposed algorithm can control the bit rate efficiently.
The rate and distortion of Id-slice do not fit the globally linear relationship on a logarithmic scale. Lagrange multiplier selection methods based on the globally linear approximate relationship are neither efficient...
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The rate and distortion of Id-slice do not fit the globally linear relationship on a logarithmic scale. Lagrange multiplier selection methods based on the globally linear approximate relationship are neither efficient nor optimal for multi-viewvideocoding (mvc). To improve the coding efficiency of mvc, a local curve fitting based Lagrange multiplier selection method is proposed in this paper, where Lagrange multipliers are selected according to the local slopes of the approximate curves. Experi-mental results showed that the proposed method improves the coding efficiency. Up to 2.5 dB gain was achieved at low bitrates.
A novel color compensation method for multi-viewvideocoding (mvc) is proposed, which efficiently exploits the inter-view dependencies between views with the existence of color mismatch caused by the diversity of cam...
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A novel color compensation method for multi-viewvideocoding (mvc) is proposed, which efficiently exploits the inter-view dependencies between views with the existence of color mismatch caused by the diversity of cameras. A color compensation model is developed in RGB channels and then extended to YCbCr channels for practical use. A modified inter-view reference picture is constructed based on the color compensation model, which is more similar to the coding picture than the original inter-view reference picture. Moreover, the color compensation factors can be derived in both encoder and decoder, therefore no additional data need to be transmitted to the decoder. The experimental results show that the proposed method improves the coding efficiency of mvc and maintains good subjective quality.
Free-viewvideo （FVV） is a new developing video system,which is intended to give the viewers more than one perspective of viewing point to enjoy the video content. Among the whole video processing chain of FVV frame...
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Free-viewvideo （FVV） is a new developing video system,which is intended to give the viewers more than one perspective of viewing point to enjoy the video content. Among the whole video processing chain of FVV framework,virtual frame synthesis plays a key role for FVV realization. In our previous work,we proposed a FVV encoding format based on multi-view video coding （mvc）. In this paper,we present a novel virtual frame synthesis approach based on Scale Invariant Feature Transform （SIFT） feature detecting and matching technique for FVV design and implementation. The novelty of the proposed approach is that no strict camera calibration is needed when the virtual frames are synthesized. Compared with other virtual frame synthesis approaches,our approach takes use of scale invariant features to better keep the detailed information in the frame. Another advantage of the approach is its robustness in processing different kinds of input images,which is illustrated in the experiment part in this paper.
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