Recursive CORDIC- Based Low Power DCT Architecture

  IJETT-book-cover  International Journal of Engineering Trends and Technology (IJETT)          
© 2015 by IJETT Journal
Volume-20 Number-6
Year of Publication : 2015
Authors : Mrs. M.Nidhiya Aravind, Ms.A.Shanmukapriya


Mrs. M.Nidhiya Aravind , Ms.A.Shanmukapriya "Recursive CORDIC- Based Low Power DCT Architecture", International Journal of Engineering Trends and Technology (IJETT), V20(6),270-274 Feb 2015. ISSN:2231-5381. published by seventh sense research group


One of the maximum commonly used transform technique is Discrete Cosine Transform (DCT). In the DCT algorithm the inputs are in spatial domain and the outputs are in frequency domain and it is mostly used for image compression. DCT using Coordinate Rotation Digital Computer (CORDIC) algorithm lessen the number of calculation and increases the accuracy. Therefore discrete cosine transform design using CORDIC is used to obtain low power. All calculation in DCT are not equitably essential in producing the frequency domain output. Therefore the calculation energy can be lessen without severely incriminating the image quality. The 2-D DCT achieves more power saving. In a lookahead CORDIC approach, all interior data path become individualistic and the number of repetition can be easily controlled but the implementation complexity of lookahead CORDIC is considerably high because it requires more area. Therefore the recursive CORDIC is proposed in this project. This technique is easy to implement and considered as an appropriate technique. The power requirement for recursive CORDIC is less compared to lookahead CORDIC. The implementation is done using the Modelsim SE9.1i software


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Key words
Coordinate rotation digital computer (CORDIC), low power, discrete cosine transforms (DCT).