With the rapid development of computers, communication and multimedia electronic products, application of high quality images is becoming more and more popular. Improvement of image quality is a very important subject...
详细信息
ISBN:
(纸本)9783037853191
With the rapid development of computers, communication and multimedia electronic products, application of high quality images is becoming more and more popular. Improvement of image quality is a very important subject at present. Basic on compression technology of static images, this subject raises adaptive quantitative methods for different images, adopts secondary calculation method during quantization, and then gives simulation validation to images by Matlab software. According to the rate of high-frequency and low-frequency of images, adjust quantization table to make the best effort of image compression.
Reed-Solomon (RS) codes are widely used in storage systems to ensure data reliability. In this paper, we first propose a new construction of RS codes with between three to five parity symbols over a special finite fie...
详细信息
ISBN:
(纸本)9798350348941;9798350348934
Reed-Solomon (RS) codes are widely used in storage systems to ensure data reliability. In this paper, we first propose a new construction of RS codes with between three to five parity symbols over a special finite field of size 256. We show that all the operations involved in the encoding/decoding process can be implemented by XOR and cyclic shift. Second, we present a fast encoding/decoding algorithm for our codes by designing a modified Reed-Muller (RM) transform that has both small computational complexity and space complexity. We show that our codes have much lower space complexity and nearly the same computational complexity, compared with the existing RM-based RS codes. Simulation results demonstrate that our codes improve encoding and decoding throughput by 34.06% and 31.66%, respectively, under evaluated parameters, compared with existing RM-based RS codes.
This paper presents the idea of optimization algorithm of adaptive wavelets that can improve the coding algorithm to decrease the computation complexity to ten percent of that presented in the paper[5]. The full optim...
详细信息
ISBN:
(纸本)7505338900
This paper presents the idea of optimization algorithm of adaptive wavelets that can improve the coding algorithm to decrease the computation complexity to ten percent of that presented in the paper[5]. The full optimization of adaptive wavelets is replaced by the new method, in which the optimization is divided into two cascaded steps. And the entropy-coding-based quantization of side information is adopted so that tile bit rate is significantly reduced because it accounts for a plenty of percent of bit costs. The bit rate can decrease about 15 percent of that presented ill paper [8] by taking the method. It also coordinates with psycho-acoustics model and dynamic bits allocation scheme to make the coding noise inaudible under the condition of the least bits cost.
Optical encoder is the important sensor used for length and angle measurement. A new type optical encoder: virtual absolute encoder has inherited the advantage of the two old traditional ones. The principle of virtual...
详细信息
Optical encoder is the important sensor used for length and angle measurement. A new type optical encoder: virtual absolute encoder has inherited the advantage of the two old traditional ones. The principle of virtual absolute encoder has been introduced. A practical coding algorithm was designed according to the characters of the slit disk. The code design of indexing track highest to 17 bits comes true with the aid of computer aided design (CAD). A method to decode was also developed, which can convert the binary cyclic code into binary natural code, and this method furnishes the further engineering practice with the theoretical foundation.
A class of practical orchard codes on finite field GF（2） are *** coding and decoding algorithms are *** algorithms are implemented in the C programming *** is shown that this class of orchard codes are easy and comp...
详细信息
A class of practical orchard codes on finite field GF（2） are *** coding and decoding algorithms are *** algorithms are implemented in the C programming *** is shown that this class of orchard codes are easy and comparatively fast to decode,and are very powerful for applications wheTe channel SER/BBK is high and burst error occurs.
暂无评论