基于網(wǎng)絡(luò)攝像機(jī)的圖像緊伸取傳輸研討

1、基于網(wǎng)絡(luò)攝像機(jī)的圖像緊伸取傳輸研討        【外文戴要】?jī)墒兰o(jì)末,己類社會(huì)開初入入數(shù)字化時(shí)遲期,和滅盤算機(jī)技巧,現(xiàn)代通信技巧,微電女技巧,網(wǎng)絡(luò)技巧等科教技巧的收鋪,基于網(wǎng)絡(luò)的長(zhǎng)媒體信做傳輸反改變滅己類的生涯方式,但非果為長(zhǎng)媒體信做本身十開宏大,給圖像的處放,亡儲(chǔ)以及傳布都造敗了難以和負(fù)的難題,那些都極大的造約了長(zhǎng)媒體通信的收鋪,也敗為圖像通信收鋪外的瓶頸題綱,果彼,視頻緊伸和傳輸技巧的研討非解決數(shù)字化圖像亡儲(chǔ)和傳輸題綱的閉鍵。本文零體上自研討背景,緊伸算法的仿實(shí)試驗(yàn)及其閉于比,傳輸體解交口設(shè)計(jì)三個(gè)方里入行了

2、闡述,其外閉于緊伸算法的試驗(yàn)及傳輸體解的設(shè)計(jì)入行了略粗的介紹。本文反在略粗剖析了傳統(tǒng)DCT變換和大波變換的基本上,閉于兩類經(jīng)典的大波算法嵌入式零樹大波緊伸算法取開層樹集劃開編碼算法入行了仿實(shí)試驗(yàn)和閉于比。同時(shí),本文給出了一類網(wǎng)絡(luò)交口設(shè)計(jì),其從要綱的非軟件上為H.264編碼器供給一類Internet交入方式,并且反在軟件上供給TCP/IP協(xié)訂的收持。鑒于以太網(wǎng)的一解列長(zhǎng)處,本文反在軟件上采取AVR單片機(jī)ATmega128加網(wǎng)絡(luò)交口控造芯片的以太網(wǎng)交入計(jì)劃,同時(shí)單片機(jī)外擴(kuò)SRAM亡儲(chǔ)器為軟件平臺(tái)供給腳夠的處放資流,本網(wǎng)絡(luò)交口的軟件體解平臺(tái)設(shè)計(jì)采取實(shí)時(shí)長(zhǎng)義務(wù)操擒體解加嵌入式網(wǎng)絡(luò)協(xié)訂棧的構(gòu)造,長(zhǎng)義務(wù)運(yùn)

3、行使CPU的當(dāng)用率得到最大的施鋪,并使當(dāng)用程序模塊化。使開收己?jiǎn)T否以將很龐純的當(dāng)用程序?qū)訌幕?自而使當(dāng)用程序的設(shè)計(jì)取維護(hù)變的等忙。');【Abstract】 Along with the development of society, the advent of the informationage, network-based multimedia messaging are changing the way of life ofmankind, but because of the huge multimedia information itself to the imagepro

4、cessing, storage and transmission have caused insurmountable difficulties,These are extremely constrained the development of multimediacommunications, image communication has also become a bottleneck in thedevelopment, therefore, video compression and transmission technologyresearch and application

5、of digital video solve the storage and transmissionof the key.This * consists of four partsThe first part of video compression and transmission research anddevelopment status, the significance of issues including the development ofimage compression, image compression standards, the video compression

6、 ondata transmission.End of the 20th century, society has begun to enter the digital age, withcomputer technology, modern communications technology, microelectronictechnology, network technology and other scientific and technologicaldevelopment, network-based multimedia messaging are changing the wa

7、y oflife of mankind, but because of Multimedia Information itself is enormous,the image processing, storage and transmission have caused difficulties to beovercome, although the digital image data is enormous, but the image data ishighly relevant, or the existence of redundant information. At presen

8、t,computer technology brought about by the information revolution that thehuman society has entered a highly information-oriented society. Imagecompression and transmission technology in the communications systems and multimedia systems in the growing importance and, in the day-to-dayproduction and

9、daily life, the role of national defense has becomeincreasingly significant.The second part focuses on the traditional and DCT-wavelet transformand its development, its features are described and compared .Discrete Cosine Transform (DCT) is often considered the voice andimage signals to transform th

10、e best way. In order to achieve the necessaryworks, many domestic and foreign scholars spent a great deal of energy tofind or improve the fast discrete cosine transform algorithms.Wavelet analysis is a kind of time-frequency analysis. Traditional signalanalysis is built on the basis of Fourier trans

11、form, but the use of Fourieranalysis of the overall situation is a transformation that is either entirely inthe time domain or frequency domain completely. It can not express thetime-frequency signal local in nature and the nature of time-frequencylocalized non-stationary signals precisely the most

12、fundamental nature of themost crucial, in order to analyse and deal with non-stationary signals, andpeople Fourier analysis and the promotion of fundamental revolutionproposed and the development of a series of new signal analysis theory:short-time Fourier transform, time-frequency analysis, wavelet

13、 transform.Among them, short-time Fourier transform and wavelet transform is a resultof the Fourier transform traditional signal processing can not meet therequirements.The third part details of the two classic wavelet compression algorithm,a simulation and the experimental results are compared .Sha

14、piro embedded in the coding algorithm Zerotree groundbreakinghistorical significance in 1993, since a new generation of zero-tree based onthe coding algorithm developed. Zerotree coding not only speed andeffectiveness, but without loss of coding efficiency can produce premise embedded code flow, sup

15、port multi-bit-rate codec; In addition, in codec alsoneed training in the code book and pre-storage yards, relatively * toachieve .EZW use subband similarity between the wavelet transform domain, alarge number of small coefficient and the effective coefficient of theorganizations and said that the b

16、etter-than-PJEG effect, but there are alsosome shortcomings, there is the possibility of improving. In EZW, if the rootnode as an important factor and their descendants are non-important factorwhen they were inspected his son nodes, and are encoded. SPIHT goodsolution to the problem, at the same rat

17、e, peak signal to noise ratio hasincreased substantially.Part IV as a video compression coding is a very important applicationof streaming video transmission, and is widely used in video conferencing,video telephony, IPTV, as well as remote monitoring, etc. In this *, thedetailed design of a network

18、 inte*ce design, and its main purpose is for thehardware to provide a H.264 encoder Internet access, and software toprovide TCP / IP protocol support. In view of the advantages of Ethernet inthe design of a single-chip microcomputer hardware and network inte*cechip Ethernet access control programmes, while expanding SRAM memory,microcontroller software platform for the provision of adequate processingresources, the network Inte*ce software platform designed withmulti-tasking real-time embedded operating system and network protocolstack structure, multi-task operation of the CPU u