Spatial-Aided Low-Delay Wyner-Ziv Video Coding
In distributed video coding, the side information (SI) quality plays an important role in Wyner-Ziv (WZ) frame coding. Usually, SI is generated at the decoder by the motion-compensated interpolation (MCI) from the past and future key frames under the assumption that the motion trajectory between the...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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SpringerOpen
2009-01-01
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| Series: | EURASIP Journal on Image and Video Processing |
| Online Access: | http://dx.doi.org/10.1155/2009/109057 |
| _version_ | 1811249425134125056 |
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| author | Bo Wu Xiangyang Ji Debin Zhao Wen Gao |
| author_facet | Bo Wu Xiangyang Ji Debin Zhao Wen Gao |
| author_sort | Bo Wu |
| collection | DOAJ |
| description | In distributed video coding, the side information (SI) quality plays an important role in Wyner-Ziv (WZ) frame coding. Usually, SI is generated at the decoder by the motion-compensated interpolation (MCI) from the past and future key frames under the assumption that the motion trajectory between the adjacent frames is translational with constant velocity. However, this assumption is not always true and thus, the coding efficiency for WZ coding is often unsatisfactory in video with high and/or irregular motion. This situation becomes more serious in low-delay applications since only motion-compensated extrapolation (MCE) can be applied to yield SI. In this paper, a spatial-aided Wyner-Ziv video coding (WZVC) in low-delay application is proposed. In SA-WZVC, at the encoder, each WZ frame is coded as performed in the existing common Wyner-Ziv video coding scheme and meanwhile, the auxiliary information is also coded with the low-complexity DPCM. At the decoder, for the WZ frame decoding, auxiliary information should be decoded firstly and then SI is generated with the help of this auxiliary information by the spatial-aided motion-compensated extrapolation (SA-MCE). Theoretical analysis proved that when a good tradeoff between the auxiliary information coding and WZ frame coding is achieved, SA-WZVC is able to achieve better rate distortion performance than the conventional MCE-based WZVC without auxiliary information. Experimental results also demonstrate that SA-WZVC can efficiently improve the coding performance of WZVC in low-delay application. |
| first_indexed | 2024-04-12T15:46:19Z |
| format | Article |
| id | doaj.art-3c22b76b3505481985c6b89331f24195 |
| institution | Directory Open Access Journal |
| issn | 1687-5176 1687-5281 |
| language | English |
| last_indexed | 2024-04-12T15:46:19Z |
| publishDate | 2009-01-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | EURASIP Journal on Image and Video Processing |
| spelling | doaj.art-3c22b76b3505481985c6b89331f241952022-12-22T03:26:38ZengSpringerOpenEURASIP Journal on Image and Video Processing1687-51761687-52812009-01-01200910.1155/2009/109057Spatial-Aided Low-Delay Wyner-Ziv Video CodingBo WuXiangyang JiDebin ZhaoWen GaoIn distributed video coding, the side information (SI) quality plays an important role in Wyner-Ziv (WZ) frame coding. Usually, SI is generated at the decoder by the motion-compensated interpolation (MCI) from the past and future key frames under the assumption that the motion trajectory between the adjacent frames is translational with constant velocity. However, this assumption is not always true and thus, the coding efficiency for WZ coding is often unsatisfactory in video with high and/or irregular motion. This situation becomes more serious in low-delay applications since only motion-compensated extrapolation (MCE) can be applied to yield SI. In this paper, a spatial-aided Wyner-Ziv video coding (WZVC) in low-delay application is proposed. In SA-WZVC, at the encoder, each WZ frame is coded as performed in the existing common Wyner-Ziv video coding scheme and meanwhile, the auxiliary information is also coded with the low-complexity DPCM. At the decoder, for the WZ frame decoding, auxiliary information should be decoded firstly and then SI is generated with the help of this auxiliary information by the spatial-aided motion-compensated extrapolation (SA-MCE). Theoretical analysis proved that when a good tradeoff between the auxiliary information coding and WZ frame coding is achieved, SA-WZVC is able to achieve better rate distortion performance than the conventional MCE-based WZVC without auxiliary information. Experimental results also demonstrate that SA-WZVC can efficiently improve the coding performance of WZVC in low-delay application.http://dx.doi.org/10.1155/2009/109057 |
| spellingShingle | Bo Wu Xiangyang Ji Debin Zhao Wen Gao Spatial-Aided Low-Delay Wyner-Ziv Video Coding EURASIP Journal on Image and Video Processing |
| title | Spatial-Aided Low-Delay Wyner-Ziv Video Coding |
| title_full | Spatial-Aided Low-Delay Wyner-Ziv Video Coding |
| title_fullStr | Spatial-Aided Low-Delay Wyner-Ziv Video Coding |
| title_full_unstemmed | Spatial-Aided Low-Delay Wyner-Ziv Video Coding |
| title_short | Spatial-Aided Low-Delay Wyner-Ziv Video Coding |
| title_sort | spatial aided low delay wyner ziv video coding |
| url | http://dx.doi.org/10.1155/2009/109057 |
| work_keys_str_mv | AT bowu spatialaidedlowdelaywynerzivvideocoding AT xiangyangji spatialaidedlowdelaywynerzivvideocoding AT debinzhao spatialaidedlowdelaywynerzivvideocoding AT wengao spatialaidedlowdelaywynerzivvideocoding |