Details

Autor(en) / Beteiligte

• Shi, Yunhui
• Wang, Yuansong
• Wang, Jin
• Ding, Wenpeng
• Yin, Baocai

Titel

Optimal sequence reordering for low delay screen content coding

Ist Teil von

• Multimedia tools and applications, 2024, Vol.83 (1), p.635-654

Ort / Verlag

New York: Springer US

Erscheinungsjahr

2024

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Screen content denotes images generated by computers, which consists of texts, graphics and synthetic images. Conventional encoding strategies developed for natural content, which are premised on the strong temporal relevance, may not work well for screen content. This is because the irregular motion of objects results in the weak temporal relevance in screen content, which also makes the selection of reference pictures not optimal. This paper proposes an optimal picture reordering scheme for screen content coding to enhance the temporal relevance of screen content. In our scheme, a concept of inter-picture correlation is introduced to help formulate the temporal relevance problem, and a model of permutation is proposed to produce the new order of the pictures. To further improve the coding efficiency, a reference picture selecting algorithm is also proposed. Better compression performance can then be achieved. Compared with SCC extension of HEVC, on average, 2.82% bit rate saving can be achieved by reordering the pictures and 4.40% bit saving is achieved by further utilizing the reference pictures selection algorithm.