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Proceedings Paper

Scene cut detection in three-dimensional discrete cosine transform-based video codec
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Paper Abstract

This paper describes how a scene cut detector could be utilized in a video codec based on the three-dimensional discrete cosine transform (3D DCT). In the 3D DCT based video codec, data is processed with 8x8x8 cubes, hence a set of 8 images need to be available in a memory at a time. A change of video scene may occur between any of those images stored in the memory. Rapid scene change within an 8x8x8 cube produces significant high frequency coefficients into the temporal dimension of the DCT domain. If the important high frequency coefficients are discarded, the information between the scenes is mixed around the scene cut position causing ghost artifacts into the reconstructed video sequence. Therefore, an approach to handle each of the eight possible scene change situations within an 8x8x8 cube is proposed. The proposed method includes the utilization of the 8x8x4 DCT, forced-fill, repeat previous frame, and average to previous frame techniques. By utilizing a scene cut detector into the 3D DCT based video codec, unnecessary quality drops could be avoided without reducing the compression ratio. Notable quality improvements could be achieved for images around a scene cut position.

Paper Details

Date Published: 14 March 2005
PDF: 7 pages
Proc. SPIE 5684, Multimedia on Mobile Devices, (14 March 2005); doi: 10.1117/12.596704
Show Author Affiliations
Jari J. Koivusaari, Tampere Univ. of Technology (Finland)
Jarmo H. Takala, Tampere Univ. of Technology (Finland)

Published in SPIE Proceedings Vol. 5684:
Multimedia on Mobile Devices
Reiner Creutzburg; Jarmo H. Takala, Editor(s)

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