IOE OpenIR  > 光电传感技术研究室(六室)
Improved SAP based on adaptive directional prediction for HEVC lossless intra prediction
Xia, Xiao-Peng1,2; Liu, En-Hai1; Qin, Jun-Ju3
Source PublicationJournal of Visual Communication and Image Representation
Volume33Pages:78-84
2015
Language英语
ISSN1047-3203
DOI10.1016/j.jvcir.2015.09.003
Indexed BySCI ; Ei
WOS IDWOS:000364982700008
Subtype期刊论文
AbstractIn HEVC (High Efficiency Video Coding), linear interpolation of the boundary pixels is used as the predictor and pixels within the same PU (Prediction Unit) are in the same prediction direction. When the PU block is large and in high complexity, the prediction performance would worsen. Although many algorithms use the pixel-based weighted averaging or interpolation operations to perform the prediction which improves the performance of bitrate saving notably, there is still space for further improvement. This paper proposed an improved SAP (Sample-based Angular Prediction) algorithm based on adaptive directional prediction (ADSAP). The innovation of this paper lies in two aspects: it puts forward a new method to estimate the best prediction direction of current pixel and it introduces the concept of "frame-level pretreatment" which could greatly improve the encoding speed. Experimental results show that it could save the output bitrate by about 9.4158% when compared with the HEVC lossless intra prediction algorithm, which is better than other typical algorithms. Besides, the encoding and decoding time are reduced by about 11%. Moreover, when the minimum PU size gets larger, the increase of output bitrate of ADSAP is much less than that of HEVC and the conventional SAP algorithm, which makes the proposed algorithm quite suitable for the compression of high resolution videos. © 2015 Elsevier Inc. All rights reserved.; In HEVC (High Efficiency Video Coding), linear interpolation of the boundary pixels is used as the predictor and pixels within the same PU (Prediction Unit) are in the same prediction direction. When the PU block is large and in high complexity, the prediction performance would worsen. Although many algorithms use the pixel-based weighted averaging or interpolation operations to perform the prediction which improves the performance of bitrate saving notably, there is still space for further improvement. This paper proposed an improved SAP (Sample-based Angular Prediction) algorithm based on adaptive directional prediction (ADSAP). The innovation of this paper lies in two aspects: it puts forward a new method to estimate the best prediction direction of current pixel and it introduces the concept of "frame-level pretreatment" which could greatly improve the encoding speed. Experimental results show that it could save the output bitrate by about 9.4158% when compared with the HEVC lossless intra prediction algorithm, which is better than other typical algorithms. Besides, the encoding and decoding time are reduced by about 11%. Moreover, when the minimum PU size gets larger, the increase of output bitrate of ADSAP is much less than that of HEVC and the conventional SAP algorithm, which makes the proposed algorithm quite suitable for the compression of high resolution videos. © 2015 Elsevier Inc. All rights reserved.
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ioe.ac.cn/handle/181551/5137
Collection光电传感技术研究室(六室)
Corresponding AuthorXia, Xiao-Peng
Affiliation1. Institute of Optics and Electronics, Chinese Academy of Sciences, Chengdu, China
2. University of Chinese Academy of Sciences, Beijing, China
3. Chengdu Normal University, Chengdu, China
Recommended Citation
GB/T 7714
Xia, Xiao-Peng,Liu, En-Hai,Qin, Jun-Ju. Improved SAP based on adaptive directional prediction for HEVC lossless intra prediction[J]. Journal of Visual Communication and Image Representation,2015,33:78-84.
APA Xia, Xiao-Peng,Liu, En-Hai,&Qin, Jun-Ju.(2015).Improved SAP based on adaptive directional prediction for HEVC lossless intra prediction.Journal of Visual Communication and Image Representation,33,78-84.
MLA Xia, Xiao-Peng,et al."Improved SAP based on adaptive directional prediction for HEVC lossless intra prediction".Journal of Visual Communication and Image Representation 33(2015):78-84.
Files in This Item:
There are no files associated with this item.
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Xia, Xiao-Peng]'s Articles
[Liu, En-Hai]'s Articles
[Qin, Jun-Ju]'s Articles
Baidu academic
Similar articles in Baidu academic
[Xia, Xiao-Peng]'s Articles
[Liu, En-Hai]'s Articles
[Qin, Jun-Ju]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Xia, Xiao-Peng]'s Articles
[Liu, En-Hai]'s Articles
[Qin, Jun-Ju]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.