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Shift-Register-Based Data Transposition for Cost-Effective Discrete Cosine Transform

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2 Author(s)
Shih-Chang Hsia ; Nat. Kaohsiung First Univ. of Sci. & Technol., Kaohsiung ; Szu-Hong Wang

This paper presents a cost-effective 2-D-discrete cosine transform (DCT) architecture based on the fast row/column decomposition algorithm. We propose a new schedule for 2-D-DCT computing to reduce the hardware cost. With this approach, the transposed memory can be simplified using shift-registers for the data transposition between two 1-D-DCT units. A special shift cell with MOS circuit is designed by using the energy transferring methodology. The memory size can be greatly reduced, and the address generator and its READ/WRITE control all can be saved. For an 8 times 8-block transformation, the number of transistors is only 4 k for the shift-register array. The maximum frequency of shift-operation can achieve about 120 MHz, when implemented by 0.35-mum technology.

Published in:

Very Large Scale Integration (VLSI) Systems, IEEE Transactions on  (Volume:15 ,  Issue: 6 )

Date of Publication:

June 2007

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