This research shows a 1mW Low Power and real-time imaging Tx/Rx communication system via RF-delay
smart Antenna using up to 10GHz UWB(Ultra WideBand) as a concept of Wireless Medical Telemetry Service
(WMTS). This UTCOMS (COMmunication System for Nano-scale USLI designed Endoscope using UWB technology)
results in less body loss(about 6~13dB) at high frequency, disposable and ingestible compact size of 5×10 mm2 and
multifunction, bidirectional communications, independent subsystem control multichannel, and high sensitivity smart
receiving antenna of three-dimensional image captured still and moving images.
Proc. SPIE. 5274, Microelectronics: Design, Technology, and Packaging
KEYWORDS: Image processing algorithms and systems, Detection and tracking algorithms, Visualization, Image segmentation, Video, Computer programming, Video surveillance, Video processing, Motion estimation, Video coding
This paper presents a semi-automatic segmentation method which can be used to generate video object plane (VOP) for object based coding scheme and multimedia authoring environment. Semi-automatic segmentation can be considered as a user-assisted segmentation technique. A user can initially mark objects of interest around the object boundaries and then the user-guided and selected objects are continuously separated from the unselected areas through time evolution in the image sequences. The proposed segmentation method consists of two processing steps: partially manual intra-frame segmentation and fully automatic inter-frame segmentation. The intra-frame segmentation incorporates user-assistance to define the meaningful complete visual object of interest to be segmentation and decides precise object boundary. The inter-frame segmentation involves boundary and region tracking to obtain temporal coherence of moving object based on the object boundary information of previous frame. The proposed method shows stable efficient results that could be suitable for many digital video applications such as multimedia contents authoring, content based coding and indexing. Based on these results, we have developed objects based video editing system with several convenient editing functions.
Noise generation systems are used to generate noise signals with specified characteristics. In recent study, noise generation system using DCT outperforms the conventional noise generation system when a noise model requires complicated PSD (Power Spectral Density) specifications. In this paper, high density and low power structures of non-DCT block in DCT-based noise generation system are proposed. Simulation results show that the high density structure results in area reduction by 61 ~ 64% and the low power structure achieves power reduction by 88 ~ 89%.
In this paper, we propose the architecture of the MPLS switch supporting Differentiated Services in the MPLS-based network. The traffic conditioner consists of a classifier, a meter, and a marker. The VOQ-PHB module which combines input queue with each PHB queue is implemented to utilize the resources more efficiently, employing the Priority-iSLIP scheduling algorithm to support high-speed switching. The proposed MPLS switch architecture is modeled and synthesized by Very High Speed Integrated Circuits Hardware Description Language (VHDL), verified and then implemented by commercialized CAD tools to justify the validity of the proposed hardware architecture.
UWB impulse radio signals have a very short duration, extremely wide bandwidth and share the same frequency spectrum with other existing systems. It was determined by the Federal Communications Commission (FCC) that UWB systems could cause interference with other systems, such as Global Positioning System (GPS) for example. Therefore, at present, the FCC has restricted the use of UWB systems to frequencies above 3.1 GHz. In this paper, we evaluated performance of UWB system using proposed pulses that are strictly limited in time to remove interference while, at the same time, contain their power distribution to a frequency band from 3.1 GHz to 10.6 GHz. In particular, we evaluated the BER Performance in relation to system parameters such as pulse duration, δ, the number of users, Nu, and the number of symbols, M. We found the optimal pulse duration δ through computer simulation using developed UWB pulses. It is shown that performance evaluation between the UWB communication system using these UWB pulses and the Gaussian monocycle pulse in M-ary PPM and BPSK schemes. These results can be contributed to construct M-ary PPM UWB communication system in terms of multiuser parameters and pulse duration.
Mobile multimedia communication has rapidly become a significant area of research and development constantly challenging boundaries on a variety of technological fronts. The processing requirements for the capture, conversion, compression, decompression, enhancement, display, etc. of increasingly higher quality multimedia content places heavy demands even on current ULSI (ultra large scale integration) systems, particularly for mobile applications where area and power are primary considerations. The ADC presented in this paper is designed for a vertically integrated (3D) system comprising two distinct layers bonded together using Indium bump technology. The top layer is a CMOS imaging array containing analogue-to-digital converters, and a buffer memory. The bottom layer takes the form of a configurable array processor (CAP), a highly parallel array of soft programmable processors capable of carrying out complex processing tasks directly on data stored in the top plane. This paper presents a ADC scheme for the image capture plane. The analogue photocurrent or sampled voltage is transferred to the ADC via a column or a column/row bus. In the proposed system, an array of analogue-to-digital converters is distributed, so that a one-bit cell is associated with one sensor. The analogue-to-digital converters are algorithmic current-mode converters. Eight such cells are cascaded to form an 8-bit converter. Additionally, each photo-sensor is equipped with a current memory cell, and multiple conversions are performed with scaled values of the photocurrent for colour processing.
In this paper, we proposed a new First Partial product Addition (FPA) architecture with new compressor (or parallel counter) to CSA tree built in the process of adding partial product for improving speed in the fast parallel multiplier to improve the speed of calculating partial product by about 20% compared with existing parallel counter using full Adder. The new circuit reduces the CLA bit finding final sum by N/2 using the novel FPA architecture. A 5.14ns of multiplication speed of the 16X16 multiplier is obtained using 0.25um CMOS technology. The architecture of the multiplier is easily opted for pipeline design and demonstrates high speed performance.
As the communication era comes in reality, SOC in microelectronics is not only an emerging issue for multiple applications, but the combination of sensor and the SOC, iMEMS, out of high density and low power micromachining technologies in semiconductor work has attracted many researchers for several years. For practical purposes, circular-shape SOI micro-cavity technology facilitates multiple sensors on very small chip size possibility, makes device easier to package than conventional sensor like pressure sensor and also diaphragm can be any shape, defining the diaphragm photolithographically and also provides very high over-pressure capability. This paper demonstrates the cross-functional result for stress analyses, for finding permissible diaphragm dimension by output sensitivity, and piezoresistive sensor theory from two-type SOI structures. Those results are also compared with the ones of circular-shape bulk-Si based sensor. It is observed that the double SOI structure shows the most feasible deflection and small stress at various ambient pressure. The SOI microcavity formed the sensors is promising to integrate with calibration, gain stage and controller unit plus high current/high voltage CMOS drivers onto monolithic chip.