中国科学院机构知识库网格系统: 检索

Research on High Precision Locating of Laser Spot Center in Free-Space Laser Communication System 会议论文 OAI收割
Xi'an, China, 2021-10-15
作者: Meng, Xiangsheng; Ma, Caiwen; Tian, Yan; Han, Junfeng; Liang, Dongsheng

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收藏 | 浏览/下载：49/0 | 提交时间：2021/12/06

laser communication laser spot centroid bilinear interpolation hardware implementation

An Ultrahigh-Speed Object Detection Method With Projection-Based Position Compensation 期刊论文 OAI收割
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT, 2020, 卷号: 69, 期号: 7, 页码: 4796-4806
作者: Li, Jianquan; Long, Xianlei; Xu, De; Gu, Qingyi; Ishii, Idaku

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收藏 | 浏览/下载：42/0 | 提交时间：2020/08/03

Field-programmable gate array (FPGA) hardware implementation histogram of oriented gradient (HOG) object detection pixel projection ultrahigh-speed vision

An unfolded pipelined polar decoder with hybrid number representations for multi-user mimo systems 期刊论文 OAI收割
IEEE Transactions on Circuits and Systems II: Express Briefs, 2020, 卷号: 67, 期号: 11, 页码: 2472-2476
作者: Cao S(曹姗); Zheng, Hu; Lin, Ting; Zhang SQ(张舜卿); Xu SG(徐树公)

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收藏 | 浏览/下载：32/0 | 提交时间：2020/11/28

Polar code belief propagation (BP) decoder multi-user MIMO systems hardware implementation

A Hardware-Oriented Algorithm for Ultra-High-Speed Object Detection 期刊论文 OAI收割
IEEE SENSORS JOURNAL, 2019, 卷号: 19, 期号: 10, 页码: 3818-3831
作者: Li, Jianquan; Liu, Xilong; Liu, Fangfang; Xu, De; Gu, Qingyi

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收藏 | 浏览/下载：75/0 | 提交时间：2019/07/12

Hardware implementation high-frame-rate vision field-programmable gate array multi-object detection histograms of oriented gradient support vector machine

A hybrid median filter for enhancing dim small point targets and its fast implementation (EI CONFERENCE) 会议论文 OAI收割
2011 International Conference on Multimedia and Signal Processing, CMSP 2011, May 14, 2011 - May 15, 2011, Guilin, Guangxi, China
Yang Q.

收藏 | 浏览/下载：20/0 | 提交时间：2013/03/25

Weak stars and middle altitude orbit satellites or high altitude orbit satellites are presented as dim point targets in images of astronomical observation. They have low intensity and occupy few pixels in image. In most situations the background of sky is always ununiform and there exists pulse noises. Thus results in targets submerging in background noises and low signal noise ratio (SNR). Median filter is an effective method for removing pulse noise. But it can blur image after modifying gray of non-noise pixels when image has low SNR. A hybrid median filter algorithm is proposed to process low SNR dim point targets image. The newly proposed method can suppress the pulse noises also can increase target $SNR$ and does not add extra fake targets. The time complexity of median filter is O(N2)(N is the widow size) and is difficult to implement in hardware. For quasi real time application a fast implementation of our hybrid median filter is proposed to reduce the time complexity to O(N). Experimental results show that the newly proposed algorithm is superior to ordinary median filter and fast median filter by comparing visual effect and performance. 2011 IEEE.

A comparison of hardware implementation of BP neural network based on NIOS II single-core and multi-core processor (EI CONFERENCE) 会议论文 OAI收割
2011 International Conference on Electric Information and Control Engineering, ICEICE 2011, April 15, 2011 - April 17, 2011, Wuhan, China
作者: Zhang W.; Zhang H.; Zhang H.; Zhang W.

收藏 | 浏览/下载：15/0 | 提交时间：2013/03/25

The hardware implementation of neural network at present is introduced in this paper. And then implementations of neural network based on NIOS II single-core and multi-core processor are compared. At last the results of two methods are given taking BP network fitting sine curve for example. 2011 IEEE.

An 8-channel, area-efficient, low-power audio sampling rate converter (EI CONFERENCE) 会议论文 OAI收割
9th International Conference on Electronic Measurement and Instruments, ICEMI 2009, August 16, 2009 - August 19, 2009, Beijing, China
作者: Liu Y.

收藏 | 浏览/下载：27/0 | 提交时间：2013/03/25

A novel 8-channle third area-efficient next a new Timing Division Multiplexer (TMD) scheme lowers clock working rate to minimum in order to save power a novel memory addressing scheme reduces 20% data memory at least. Experiments show proposed methods could not only saved hardware resources but also reduce power consumption low-power audio sampling rate converter is proposed in this paper so it is very suitable for consumer electronics. 2009 IEEE. conversion ratio is 2:1 and 4:1. Filter design and implementation are the key points for the converter. First excluded data and coefficients memories adopting multiplier-free Arithmetic Unit (AU) and rounding methods allows its realization in a cell area of only 0.038mm 2 in 0.18 m technology

A multi-channel, area-efficient, audio sampling rate interpolator (EI CONFERENCE) 会议论文 OAI收割
2009 8th IEEE International Conference on ASIC, ASICON 2009, October 20, 2009 - October 23, 2009, Changsha, China
作者: Wang D.

收藏 | 浏览/下载：25/0 | 提交时间：2013/03/25

The area and power consumption of sampled rate converter are governed largely by associated digital interpolationfilters. This paper presents a novel multi-channel area-efficient audio sampling rate interpolator whose conversion ratio is 1:2 and 1:4. Several architectural and implementation features reduces the complexity of the filter and allow its realization in a die area of 0.032mm2 in 0.18 m technology meanwhile timing multiplexer scheme reduces clock frequency to minimum. Experiments show proposed methods could not only saved hardware resources but also reduce power consumption so it is very suitable for consumer electronics. 2009 IEEE.

High speed, low memory image coding using zero blocks of wavelet coefficients (EI CONFERENCE) 会议论文 OAI收割
4th International Conference on Image and Graphics, ICIG 2007, August 22, 2007 - August 24, 2007, Chengdu, China
作者: Zhang T.; Yang W.-G.

收藏 | 浏览/下载：31/0 | 提交时间：2013/03/25

We propose a new high speed low memory SPECK image coder based on the form of block-unit states called LBUS-SPECK which uses the form of block-unit states and the form of block exponents to substitute LIS and LSP of SPECK. A form of block-unit states is introduced to store the significance flag of coefficients and the value of the block-unit exponents. A form of block exponents is introduced to store the block exponents which are used to represent the max coefficient in a decomposed block. A new block depth-finding strategy is developed for searching insignificant sets at sorting stage. Experimental results show that the obtained PSNR values for the decoded images are very close to those of SPECK algorithm and the memory consumption is reduced by 9 times the encoding timing is saved about 15%. Comparing with SPECK algorithm this algorithm not only has better performance of the decoded images but also is easy to implement especially it provides an efficient way for hardware implementation of wavelet embedded block coding. 2007 IEEE.

Compression of remote sensing image based on Listless Zerotree Coding and DPCM (EI CONFERENCE) 会议论文 OAI收割
ICO20: Remote Sensing and Infrared Devices and Systems, August 21, 2005 - August 26, 2005, Changchun, China
Chen S.-L.; Huang L.-Q.

收藏 | 浏览/下载：29/0 | 提交时间：2013/03/25

The data quantity of remote sensing image is very large. Furthermore the lowest frequency subband contains the main energy of original image and reflects the coarse of original image after remote sensing image is transformed by wavelet so it is very important to the reconstructed image. Therefore a hybrid image compression method based on Listless Zerotree Coding (LZC) and DPCM is presented namely the lowest frequency subband is compressed by DPCM and others are compressed by LZC. LZC is a kind of zerotree coding algorithm for hardware implementation which is based on SPIHT and substitutes two significant bit maps for three lists in SPIHT algorithm. Thereby LZC significantly reduces the memory requirement and complexity during encoding and decoding procedure. But LZC doesn't recognize the significance of grandchild sets so the PSNR values of LZC are lower than SPIHT's and the compression speed drops. It is improved by adding a significant bit map that recognizes the significance of grandchild sets. A comparison reveals that the PSNR results of the hybrid compression method are 2 dB higher than those of LZC and the compression speed is also improved.