| 1. |
- Cao, Cao, et al.
(författare)
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A Tool for Low-Power Synthesis of FSMs with Mixed Synchronous/Asynchronous State Memory
- 2004
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Ingår i: 22ND NORCHIP CONFERENCE, PROCEEDINGS. - : IEEE. - 0780385101 ; , s. 199-202
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Konferensbidrag (refereegranskat)abstract
- An efficient way to obtain Finite-State Machines (FSMs) with low power consumption is to,partition the machine into two or more sub-FSMs and use dynamic power management, where all sub-FSMs not active are shut down, to reduce dynamic power dissipation. In this paper we focus on FSM partitioning algorithms and RT-level power estimation functions that are the key issues in the design of a CAD tool for synthesis of low-power partitioned FSMS. We target an implementation architecture that is based on both synchronous and asynchronous state memory elements that enables larger power reductions than fully synchronous architectures do. Power reductions of up to 77% have been achieved at a cost of an increase in area of 18%.
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| 2. |
- Ericsson, A., et al.
(författare)
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Comparison of Noise Reduction and MPEG-2 Compression Efficiency for Pre-Processing Video Filters
- 2004
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Ingår i: IWSSIP'04 : international workshop on systems, signals and image processing : ( Poznan, 13-15 September 2004 ). - Poznan, Poland : Polish Society for Theoretical and Applied Electrical Engineering.
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Konferensbidrag (refereegranskat)abstract
- Video information that is input in digital video recorders or distributed over the Internet comes in various different qualities. One possibility to improve the video quality and also to improve the efficiency of the video encoder is to use different types of spatial or temporal video filters. This paper presents a comparison of the noise reduction efficiency for three different video filters. Additionally, the improvement of MPEG-2 encoding efficiency is compared. The results provide an efficiency function that can be used to select an appropriate filter type for a special situation.
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| 3. |
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| 4. |
- Jantsch, A, et al.
(författare)
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Comparison of Six Languages for System Level Descriptions of Telecom Systems
- 2001
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Ingår i: Electronic Chips & Systems Design Languages. - Boston, Mass. : Kluwer Academic Publishers. - 0792373111 ; , s. 320-
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Bokkapitel (övrigt vetenskapligt/konstnärligt)abstract
- Language evaluation for various purposes is an often repeated exercise in industry and academia. Due to the large number of influencing factors the dependence of the result on implicit or explicit assumptions is not always apparent and clear. Based on a systematic evaluation method with a large number of criteria we compare six languages with respect to the suitability as a system specification and description language for telecom applications. The languages under evaluation are VHDL, C++, SDL, Haskell, Erlang, and ProGram, which represent different paradigms. The evaluation method allows to give specific emphasis on particular aspects in a controlled way, which we use to make separate comparisons for pure software systems, pure hardware systems and mixed HW/SW systems.
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| 5. |
- Lundgren, Jan, et al.
(författare)
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A power-line noise coupling estimation methodology for architectural exploration of mixed-signal systems
- 2003
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Ingår i: Proceedings of the Southwest Symposium on Mixed-Signa Design. - : IEEE Press. - 0780377788 ; , s. 133-137
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Konferensbidrag (refereegranskat)abstract
- This paper presents methods for early estimation of digital to analog noise coupling over the power distribution network in mixed-signal systems. The methods allow both behavioral verification of mixed-signal architectures and their sensitivity to noise coupling of the power distribution network. The behavioral level noise coupling simulation models are implemented as extensions to the SystemC system design language. To illustrate the effectiveness of the proposed methods, we have estimated the power distribution network noise for a photon-counting X-ray pixel array and compared this with SPICE simulations.
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| 6. |
- Lundgren, Jan, et al.
(författare)
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Substrate Noise Coupling models for Behavioral Mixed-Signal Simulation in SystemC
- 2004
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Ingår i: Proceedings. 4th IEEE International Workshop on System-on-Chip for Real-Time Applications, (IWSOC'04), 2004. ; , s. 201-205
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Konferensbidrag (refereegranskat)abstract
- We present methods and models to simulate substrate noise coupling at the behavioral level. The models are implemented as a part of the SystemC based Behavioral level Noise Coupling (BeNoC) simulation application. The application is designed as a wrapper to SystemC component modules, enabling designers to simulate substrate noise coupling in their modules during the entire circuit refinement process. This is enabled through the two main contributions presented in this paper: (1) methods to connect the behavioral level with low level circuit simulations and (2) generation of a fast and accurate circuit model for substrate coupling simulations. The accuracy of the generated substrate noise coupling model is verified against device simulations. The same verification test case is used to demonstrate the connection between behavioral simulations and circuit simulations.
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| 7. |
- Lundgren, Jan, et al.
(författare)
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Taking Mixed-Signal Substrate Noise Coupling Simulation to the Behavoral Level using SystemC
- 2004
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Ingår i: Proceedings of the International Workshop on System-on-Chip for Real-Time Applications (IWSOC 2004)).
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Konferensbidrag (refereegranskat)abstract
- The paper presents methods and models to simulate substrate noise coupling at the behavioral level. The models are implemented as a part of the SystemC based Behavioral level Noise Coupling (BeNoC) simulation application. The application is designed as a wrapper to SystemC component modules, enabling designers to simulate substrate noise coupling in their modules during the entire circuit refinement process. This is enabled through the two main contributions presented in this paper: (1) methods to connect the behavioral level with low level circuit simulations and (2) generation of a fast and accurate circuit model for substrate coupling simulations. The accuracy of the generated substrate noise coupling model is verified against device simulations. The same verification test case is used to demonstrate the connection between behavioral simulations and circuit simulations.
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| 8. |
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| 9. |
- Norell, Håkan, et al.
(författare)
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Cubic Vector Median Filter for Noise Reduction and Improvement of Compression Efficiency
- 2004
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Ingår i: IWSSIP'04 : international workshop on systems, signals and image processing : ( Poznan, 13-15 September 2004 ). - Poznan, Poland : Polish Society for Theoretical and Applied Electrical Engineering.
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Konferensbidrag (refereegranskat)abstract
- Encoding of image sequences is today a standard task for computers and home entertainment systems. The input material is often of shifting quality, i.e. corrupted by noise in various ways. In order to store the information in an effective way some kind of compression has to be applied. When video compression is applied on an image sequence, the result is sub optimal due to the introduced noise variations. This paper presents a new cubic median filter suitable for pre-processing of noise contaminated video sequences. The presented approach reduces the bit usage for MPEG-2 encoding with up to 62% for impulse noise impaired sequences and 38% for the corresponding Gaussian.
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| 10. |
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