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

Jari J. Koivusaari; Jarmo H. Takala

doi:10.1117/12.596704

14 March 2005 Scene cut detection in three-dimensional discrete cosine transform-based video codec

Jari J. Koivusaari, Jarmo H. Takala

Proceedings Volume 5684, Multimedia on Mobile Devices; (2005) https://doi.org/10.1117/12.596704
Event: Electronic Imaging 2005, 2005, San Jose, California, United States

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.

Citation Download Citation

Jari J. Koivusaari and Jarmo H. Takala "Scene cut detection in three-dimensional discrete cosine transform-based video codec", Proc. SPIE 5684, Multimedia on Mobile Devices, (14 March 2005); https://doi.org/10.1117/12.596704

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