Spatially Adaptive Intra Mode Pre-Selection for ERP 360 Video Coding

Storch, Iago; Agostini, Luciano; Corrêa, Guilherme; Cruz, Luís A. da Silva; Palomino, Daniel

doi:10.1109/icassp40776.2020.9053374

Cited by 9 publications

(8 citation statements)

References 4 publications

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“…The average results for each algorithm are presented in Table 1, where InterTech is the result of employing all interframes prediction algorithms simultaneously (i.e., Early Skip, Reduced SR, and Reduced FME), and IntraTech is the combination of Reduced Intra Sizes and a previous work published at [11]. Table I also presents the average results of related works: Liu [12] and Ray [13] present proposals to accelerate the interframes prediction of ERP 360 videos, whereas Wang [14] and Zhang [15] propose to accelerate the intraframe prediction of ERP 360 videos.…”

Section: Resultsmentioning

confidence: 99%

“…When the average results for intraframe prediction are evaluated, Reduced Intra Sizes reduces the encoding time by 10.41%, on average, whereas posing an average coding efficiency penalty of 0.37% BD-BR. When it is combined with a previous work [11] (IntraTech line), the encoding time is reduced by 23.09% with a BD-BR of 1.21%. When compared to related works, it is visible that IntraTech is outperformed by [14] and [15].…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Exploring ERP Distortions to Reduce the Encoding Time of 360 Videos

Storch¹,

Zatt²,

Agostini³

et al. 2021

Anais Estendidos Do XXVII Simpósio Brasileiro De Sistemas Multimídia E Web (WebMedia 2021)

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The encoding of 360 videos presents many challenges. These spherical videos require a planar projection stage prior to encoding, and there are no studies on how projection interferes with the encoder decisions. Also, due to the increased resolution, encoding 360 videos is computationally costlier than conventional videos. In this work, we perform an extensive evaluation of how the texture distortions caused by the projection interfere with the encoder’s behavior and exploit these interferences to propose multiple fast algorithms to accelerate the encoding. Experimental results show that the proposed algorithms reduce encoding time significantly with minor coding efficiency penalties, while the evaluations expose novel insights into the encoder behavior. The reached results are published in important events and journals.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Exploring ERP Distortions to Reduce the Encoding Time of 360 Videos

Storch¹,

Zatt²,

Agostini³

et al. 2021

Anais Estendidos Do XXVII Simpósio Brasileiro De Sistemas Multimídia E Web (WebMedia 2021)

Self Cite

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show abstract

“…Table II also presents the results for Reduced Intra Sizes and IntraTech. The IntraTech algorithm is composed of Reduced Intra Sizes and Reduced Intra Modes -the latter being a technique designed prior to the dissertation and published at [21]. The Reduced Intra Modes algorithm employes a division into five bands, and it skips the evaluation of some prediction modes based on an analysis of the prediction modes [20] built on top of HEVC distribution in different frame regions (similar to Fig.…”

Section: B Results Of Intraframe Predictionmentioning

confidence: 99%

“…The Reduced Intra Modes algorithm employes a division into five bands, and it skips the evaluation of some prediction modes based on an analysis of the prediction modes [20] built on top of HEVC distribution in different frame regions (similar to Fig. 4) and the redundancy in intermediate encoder decisions [21].…”

Section: B Results Of Intraframe Predictionmentioning

confidence: 99%

“…The results for Reduced Intra Sizes show that it reduces the encoding time by 10.41%, on average, with an average coding efficiency penalty of 0.37% BD-BR. Also, in [21] it is discussed that Reduced Intra Modes reduces encoding time by 15.77%, on average, with an average coding efficiency of 0.64% BD-BR. Finally, when both algorithms are enabled together (II), the average results show that it reduces encoding time by 23.09% with a coding efficiency loss of 1.213% BD-BR.…”

Section: B Results Of Intraframe Predictionmentioning

confidence: 99%

See 1 more Smart Citation

Exploring ERP Distortions to Reduce the Encoding Time of 360 Videos

Storch¹,

Agostini²,

Palomino³

2021

Anais Estendidos Da XXXIV Conference on Graphics, Patterns and Images (SIBRAPI Estendido 2021)

View full text Add to dashboard Cite

The encoding of 360 videos presents many challenges. These videos require a planar projection stage before encoding, and there are no studies on how projection interferes with the encoder decisions. Also, due to the increased resolution, encoding 360 videos is computationally costlier than conventional videos. In this work, we perform an extensive evaluation of how the texture distortions caused by the projection interfere with the encoder's behavior and exploit these interferences to propose multiple fast algorithms to accelerate the encoding. Experimental results show that the proposed algorithms reduce encoding time significantly with minor coding efficiency penalties, while the evaluations expose novel insights into the encoder behavior.

show abstract