In asymmetric stereoscopic video coding, one view is coded in a quarter of the resolution of the other and the low-resolution view is predicted from the high-resolution view. This way, stereoscopic video effect could ...
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ISBN:
(纸本)9781424417650
In asymmetric stereoscopic video coding, one view is coded in a quarter of the resolution of the other and the low-resolution view is predicted from the high-resolution view. This way, stereoscopic video effect could be achieved with only moderately increased bandwidth and complexity. Inter-view prediction tools for generating the predictor of a maroblock (MB) or MB partition in the low-resolution view from the high-resolution view play a vital role for coding efficiency in asymmetric video coding. In this paper, we propose a method that applies an adaptive filter to generate picture-level adaptive inter-view predictors for MBs or MB partitions. At the encoder, a low complexity preprocessing module is built to find out the filters. Simulation results show that the proposed method provides a bit-rate saving of 26% at maximum and 5% on average.
Most of the existing 3D video quality assessment methods estimate the quality of each view independently and then pool them into unique objective score. Besides, they seldom take the motion information of adjacent fra...
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ISBN:
(纸本)9781467344050;9781467344067
Most of the existing 3D video quality assessment methods estimate the quality of each view independently and then pool them into unique objective score. Besides, they seldom take the motion information of adjacent frames into consideration. In this paper, we propose an effective stereoscopic video quality assessment method which focuses on the inter-view correlation of spatial-temporal structural information extracted from adjacent frames. The metric jointly represents and evaluates two views. By selecting salient pixels to be processed and discarding the others, the processing speed is significantly improved. Experimental results on our stereoscopic video database show that the proposed algorithm correlates well with subjective scores.
In 3D video compression, similarities between the two views can be helpful in efficient video compression. One way to take advantage of these similarities is to have one of the views at high quality and lower the qual...
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ISBN:
(纸本)9781457702310
In 3D video compression, similarities between the two views can be helpful in efficient video compression. One way to take advantage of these similarities is to have one of the views at high quality and lower the quality of the other view. In this study, we measured the bitrate reduction resulted from low-pass filtering horizontal slices in both views, with the corresponding slice in the other view kept at the original quality. Results showed that we can reduce the required bitrate for the stereoscopic video while keeping the 3D video quality close to the original video.
The emerging MVC+D standard specifies the coding of Multiview Video plus Depth (MVD) data for enabling advanced 3D video applications. MVC+D specifications define the coding of all views of MVD at equal spatial resolu...
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ISBN:
(纸本)9781479923427
The emerging MVC+D standard specifies the coding of Multiview Video plus Depth (MVD) data for enabling advanced 3D video applications. MVC+D specifications define the coding of all views of MVD at equal spatial resolution and apply a conventional MVC technique for coding the multiview texture and the depth independently. This paper presents a modified MVC+D coding scheme, where only the base view is coded at the original resolution whereas dependent views are coded at reduced resolution. To enable inter-view prediction, the base view is downsampled within the MVC coding loop to provide a relevant reference for dependent views. At the decoder side, the proposed scheme consists of a post-processing scheme which upsamples of the decoded views to their original resolution. The proposed scheme is compared against the original MVC+D scheme and an average of 4% delta bitrate reduction (dBR) in the coded views and 14.5% of dBR in the synthesized views are reported.
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