  A low-complexity orthogonal multiplierless approximation for the 16-point
discrete cosine transform (DCT) was introduced. The proposed method was
designed to possess a very low computational cost. A fast algorithm based on
matrix factorization was proposed requiring only 60~additions. The proposed
architecture outperforms classical and state-of-the-art algorithms when
assessed as a tool for image and video compression. Digital VLSI hardware
implementations were also proposed being physically realized in FPGA technology
and implemented in 45 nm up to synthesis and place-route levels. Additionally,
the proposed method was embedded into a high efficiency video coding (HEVC)
reference software for actual proof-of-concept. Obtained results show
negligible video degradation when compared to Chen DCT algorithm in HEVC.
