1D Discrete Cosine Transform using Distributed Algorithm
Trinadh Balaga1, B.Bhaskar Rao2
1Trinadh Balaga, ECE Department ,St.Teressa Institute of Engineering and technology. Vizianagaram,india.
2B.Bhaskar Rao, HOD,ECE Department ,St.Teressa Institute of Engineering and Technology. Vizianagaram, India.
Manuscript received on January 17, 2012. | Revised Manuscript received on February 05, 2012. | Manuscript published on February 29, 2012. | PP: 39-43 | Volume-1 Issue-3, February 2012. | Retrieval Number: C0188011312/2011©BEIESP
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© The Authors. Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
Abstract: Discrete Cosine Transform（DCT）, which is an important component of image and video compression, is adopted in various standardized coding schemes, such as JPEG, As the ongoing demand increases, for better compression performance of the latest video coding standard, the H.264/AVC (Advanced Video Coding) is formulated .The H.264/AVC is also known as MPEG-4 .An advantage of the H.264/AVC is the simplicity of its transform. Distributed Arithmetic (DA) is an effective method for computing inner products when one of the input vectors is fixed. It uses pre computed look-up tables and accumulators instead of multipliers for calculating inner products and has been widely used in many DSP applications such as DFT, DCT, convolution, and digital filters. In particular, there has been great interest in implementing DCT with parallel distributed arithmetic and in reducing the ROM size required in the implementations since the DA-based DCT architectures are known to have very regular structures suitable for VLSI implementations. Low hardware circuit cost as well as low power consumption. Low hardware cost is achieved by exploiting redundant computational units and a technique to reduce error introduced by sign extension is also presented. The results indicate the considerable power as well as hardware savings in presented architecture.
Keywords: Distributed Arithmetic (DA), JPEG, Discrete Cosine Transform (DCT), MPEG.