Discrete cosine transform coefficients based scan format conversion

Abstract

The extendible inverse discrete cosine transform (DCT) algorithm is introduced in this paper. It is employed in scan format conversion (SFC) of digital video, and its application is extended to decimation. The traditional decimation scheme is discussed and its defects are outlined. Comparison with the bilinear and bicubic spline algorithms shows that the visual quality of the extendible inverse discrete cosine transform (EIDCT) algorithm is equivalent to these two methods. Furthermore, it is more cost effective in hardware implementation, closer to real-time processing and lower in power consumption.

Keywords:

• digital video format conversion
• discrete cosine transform
• anti-aliasing
• sampling rate conversion
• interpolation
• decimation