| Algorithm-Based Low-Power Transform Coding Architectures. Part 1. The Multirate Approach |
1995 |
30 pages |
| Authors:
An-Yeu Wu; K. J. Liu; MARYLAND UNIV COLLEGE PARK INST FOR SYSTEMS RESEARCH
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 | In most low-power VLSI designs, the supply voltage is usually reduced to lower the total power consumption. However, the device speed will be degraded as the supply voltage goes down. In this paper, we propose new algorithmic-level techniques for compensating the increased delays based on the multirate approach. We present two methods, the Chebyshev polynomial approach and the polyphase decomposition approach, to design low-power but high-speed transform coding architectures. We ... |
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| Algorithm-Based Low-Power Transform Coding Architectures. Part 2. Logarithmic Complexity, Unified Architecture, and Finite-Precision Analysis |
1995 |
33 pages |
| Authors:
An-Yeu Wu; K. J. Liu; MARYLAND UNIV COLLEGE PARK INST FOR SYSTEMS RESEARCH
|
| In the companion paper, we addressed the low-power DCT/IDCT VLSI architectures of linear complexity increase based on the multirate approach. In this paper, we will discuss other aspects of the low-power design. Firstly, we consider the design of low-power architectures that can lower the power consumption at only O(log M) increase in hardware complexity. Next, we will extend the low-power DCT design to other orthogonal transforms such as Modulated Lapped ... |
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| System Architecture of a Massively Parallel Programmable Video Co-Processor |
1995 |
37 pages |
| Authors:
An-Yeu Wu; K. J. Liu; Arun Raghupathy; MARYLAND UNIV COLLEGE PARK INST FOR SYSTEMS RESEARCH
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| Modern video applications call for computationally intensive data processing at very high data rate. In order to meet the high-performance/low-cost constraints, the state-of-art video processor should be a programmable design to perform various tasks in video application whereas the computational power and the manufacturing cost should not be sacrificed for exchange of such flexibility. In this paper, we present a programmable video co-processor design for numerically intensive front-end video/image communications. ... |
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| Split Recursive Least Squares: Algorithms, Architectures, and Applications |
1994 |
33 pages |
| Authors:
An-Yeu Wu; K. J. Liu; MARYLAND UNIV COLLEGE PARK INST FOR SYSTEMS RESEARCH
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| In this paper, a new computationally efficient algorithm for recursive least-squares (RLS) filtering is presented. The proposed Split RLS algorithm can perform the approximated RLS with 0(N) complexity for signals having no special data structure to be exploited, while avoiding the high computational complexity (0(N2)) required in the conventional RLS algorithms. Our performance analysis shows that the estimation bias will be small when the input data are less correlated. We ... |
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