Ultra low power implementation of 2-D DCT for image/video compression
Vimal P. Singh Thoudam, Basabi Bhaumik, Shouri Chatterjee · 2010
This paper presents ultra low power implementation of eight-point 2-D DCT (Discrete Cosine Transform) based on a Loeffler DCT scheme. The proposed implementation scheme does not require any multiplier as well as scaling compensation in the computation. The constant coefficient in the rotation blocks are represented in CSD (Canonic Signed Digit) and the multiplication is approximated by shift and add operation. Clock gating scheme is also employed in the implementation to reduce power consumption further.