フィールド/フレーム適応DCTを用いた時-空間スケーラブル符号化

Abstract

This paper describes a spatio-temporal resolution scalable coding scheme. Resolution scalability means a coding property where lower partial resolution pictures can be obtained by decoding only subsets of the total coded bit stream, while the full resolution picture is reconstructed by decoding the total bit stream. This scheme employs frame subsampling associated with adaptive interpolation for temporal scalability and adaptive infield/inframe DCT for spatial scalability. The proposed scheme provides four different spatio-temporal resolutions of a video sequence-two temporal resolutions, each consisting of two spatial resolutions. This can be applied to interlaced video sequences effectively. Computer simulation results have demonstrated that this scheme has better coding performance compared to conventional non adaptive methods.