Panoramic video coding based on spherical distortion with spatio-temporal dependency
The planar coding distortion, which affects objective quality, and spherical distortion, which affects subjective quality, as well as existing independent rate-distortion optimization techniques that fail to consider the temporal propagation of spherical distortion and its impact on coding performan...
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| Format: | Article |
| Language: | zho |
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Editorial Department of Journal on Communications
2023-10-01
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| Series: | Tongxin xuebao |
| Subjects: | |
| Online Access: | http://www.joconline.com.cn/thesisDetails#10.11959/j.issn.1000-436x.2023197 |
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| _version_ | 1850212285472047104 |
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| author | Xu YANG Ce ZHU Hongwei GUO Lei LUO |
| author_facet | Xu YANG Ce ZHU Hongwei GUO Lei LUO |
| author_sort | Xu YANG |
| collection | DOAJ |
| description | The planar coding distortion, which affects objective quality, and spherical distortion, which affects subjective quality, as well as existing independent rate-distortion optimization techniques that fail to consider the temporal propagation of spherical distortion and its impact on coding performance, result in coding performance degradation.To address these issues, a spatio-temporal dependent spherical distortion model was proposed for optimizing panoramic video coding.Firstly, a spatial mapping model was proposed to map spherical distortions to coding distortions, aiming to align subjective and objective quality assessments.Secondly, a temporal propagation model for spherical distortions was introduced to enhance the overall coding performance of all coding units in the propagation chain.Finally, the coding parameters were adjusted by computing the weights for spatial mapping and temporal propagation of spherical distortions.Experimental results demonstrate that, under low-delay encoding configurations, compared to the VTM14.0, a state-of-the-art video coding benchmark, the proposed algorithm achieves an average bitrate savings of 7.4% (up to 22.1%) and reduction in coding time of 9%. |
| format | Article |
| id | doaj-art-0e4d98a684e54f29a4c64bb7ce4941d3 |
| institution | OA Journals |
| issn | 1000-436X |
| language | zho |
| publishDate | 2023-10-01 |
| publisher | Editorial Department of Journal on Communications |
| record_format | Article |
| series | Tongxin xuebao |
| spelling | doaj-art-0e4d98a684e54f29a4c64bb7ce4941d32025-08-20T02:09:22ZzhoEditorial Department of Journal on CommunicationsTongxin xuebao1000-436X2023-10-0144587159388258Panoramic video coding based on spherical distortion with spatio-temporal dependencyXu YANGCe ZHUHongwei GUOLei LUOThe planar coding distortion, which affects objective quality, and spherical distortion, which affects subjective quality, as well as existing independent rate-distortion optimization techniques that fail to consider the temporal propagation of spherical distortion and its impact on coding performance, result in coding performance degradation.To address these issues, a spatio-temporal dependent spherical distortion model was proposed for optimizing panoramic video coding.Firstly, a spatial mapping model was proposed to map spherical distortions to coding distortions, aiming to align subjective and objective quality assessments.Secondly, a temporal propagation model for spherical distortions was introduced to enhance the overall coding performance of all coding units in the propagation chain.Finally, the coding parameters were adjusted by computing the weights for spatial mapping and temporal propagation of spherical distortions.Experimental results demonstrate that, under low-delay encoding configurations, compared to the VTM14.0, a state-of-the-art video coding benchmark, the proposed algorithm achieves an average bitrate savings of 7.4% (up to 22.1%) and reduction in coding time of 9%.http://www.joconline.com.cn/thesisDetails#10.11959/j.issn.1000-436x.2023197panoramic video coding;temporal dependent rate-distortion optimization;projection;spherical distortion;coding distortion |
| spellingShingle | Xu YANG Ce ZHU Hongwei GUO Lei LUO Panoramic video coding based on spherical distortion with spatio-temporal dependency Tongxin xuebao panoramic video coding;temporal dependent rate-distortion optimization;projection;spherical distortion;coding distortion |
| title | Panoramic video coding based on spherical distortion with spatio-temporal dependency |
| title_full | Panoramic video coding based on spherical distortion with spatio-temporal dependency |
| title_fullStr | Panoramic video coding based on spherical distortion with spatio-temporal dependency |
| title_full_unstemmed | Panoramic video coding based on spherical distortion with spatio-temporal dependency |
| title_short | Panoramic video coding based on spherical distortion with spatio-temporal dependency |
| title_sort | panoramic video coding based on spherical distortion with spatio temporal dependency |
| topic | panoramic video coding;temporal dependent rate-distortion optimization;projection;spherical distortion;coding distortion |
| url | http://www.joconline.com.cn/thesisDetails#10.11959/j.issn.1000-436x.2023197 |
| work_keys_str_mv | AT xuyang panoramicvideocodingbasedonsphericaldistortionwithspatiotemporaldependency AT cezhu panoramicvideocodingbasedonsphericaldistortionwithspatiotemporaldependency AT hongweiguo panoramicvideocodingbasedonsphericaldistortionwithspatiotemporaldependency AT leiluo panoramicvideocodingbasedonsphericaldistortionwithspatiotemporaldependency |