A New Optimum-Word-Length-Assignment (OWLA) Multiplierless Integer DCT for Unified Lossless/Lossy Image Coding
نویسندگان
چکیده
Recently, we proposed a new multiplierless 1D Int-DCT modified from our existing Int-DCT by approximating floating multiplications to bit-shift and addition operations. The multiplierless 1D Int-DCT can be well operated both lossless coding and lossy coding. However, our multiplierless 1D Int-DCT is not focused on how to assign word-length for floating-multiplier approximation as short as possible for reduction of hardware complexity. In this report, we propose a new Optimum-Word-LengthAssignment (OWLA) multiplierless Int-DCT. The new OWLA multiplierless 1D Int-DCT is not only inexpensive hardware complexity but also well operated in both lossless coding and lossy coding. Simulation results confirm an effectiveness of the proposed OWLA multiplierless 1D Int-DCT.
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