The author has deeply studied the multimedia communication technique , multimedia database technique , multimedia compress technique related to the vod . in the end , the author created a software model system of vod 本文作者深入研究了vod技術(shù)中相關(guān)的多媒體通信技術(shù)、多媒體數(shù)據(jù)庫技術(shù)和多媒體壓縮技術(shù),最后建立搭建一個(gè)vod點(diǎn)播模型的軟件平臺(tái)。
Under the background of the development of computer technology , digital compressing technique , rapid band width technique and rapid high capacity memory , it is a trend to digitize video automatic broadcasting system 隨著計(jì)算機(jī)技術(shù)、數(shù)字壓縮技術(shù)、高速寬帶網(wǎng)絡(luò)技術(shù)和高速大容量存儲(chǔ)介質(zhì)的不斷完善,視頻自動(dòng)播出系統(tǒng)的各個(gè)環(huán)節(jié)走向全面數(shù)字化是一個(gè)必然趨勢(shì)。
But with the development of image compressing technique , which reduces band width for transferring condensed image data quite a lot , transmitting static images in public switched telephone network ( pstn ) becomes possible 而近年來由于圖像壓縮技術(shù)的發(fā)展,壓縮后圖像數(shù)據(jù)可大大的降低傳輸所需帶寬。這使得在公用電話交換網(wǎng)( pstn )中進(jìn)行靜止圖像的傳輸成為可能。
It expatiates the compressing techniques which are used in the train lan . then the paper detailedly analyzes the requirement of network for real - time multimedia to transmit including bandwith , delay , qos , credibility and multicast communication in the train lan 然后分析了多媒體信息在車載局域網(wǎng)中實(shí)時(shí)傳輸?shù)木W(wǎng)絡(luò)需求,對(duì)它所需要的帶寬、傳輸延遲、可靠性、多點(diǎn)通信與qos進(jìn)行了具體的分析。
This paper consists of five parts . the first chapter introduces the state - of - the - art of dsp and speech compressing technique . in the second chapter , dsp ' s characteristics , performance index , development tools of software , repertoire and hardware structure go into particulars 本論文共分為五部分,第一章為緒論部分介紹dsp及語音編碼的發(fā)展現(xiàn)狀,第二章詳細(xì)介紹dsp的特點(diǎn)、性能指標(biāo)、軟件開發(fā)工具、指令系統(tǒng)及硬件結(jié)構(gòu)。
The paper detailedly analyzes some techeniques which is related to real - time multimedia transmitting including compressing techniques . it expatiates the theory and the class of compressing techniques . it detailedly analyzes the voice compressing technique ( pcm ) and the picture compressing technique ( mpeg ) 在文中分析了多媒體信息在車載局域網(wǎng)絡(luò)中實(shí)時(shí)傳輸所涉及到的主要技術(shù):壓縮技術(shù),對(duì)它的原理與分類進(jìn)行了闡述;接著對(duì)聲音壓縮技術(shù)( pcm )與動(dòng)態(tài)圖像壓縮技術(shù)( mpeg )進(jìn)行了詳細(xì)地研究;結(jié)合車載局域網(wǎng)絡(luò)實(shí)際情況闡述了本網(wǎng)絡(luò)采用的壓縮技術(shù)。
The main point of this project is to research the theories and applications of artificial neural network ( ann ) which is suitable for large scale science data mining . especially , our research focus include : dimension reduction techniques based on independent component analysis ( ica ) and wavelet - based denoising or compressing techniques for feature extraction in scientific datasets which have complex features ; classify and clustering techniques of ann combination with data grid , back - propagation neural network , self - growing multilevel self - organizing map for large scale knowledge founding in sdm 特別深入研究以獨(dú)立分量分析( ica )為主的降維技術(shù)、以小波神經(jīng)網(wǎng)絡(luò)為主的壓縮降噪技術(shù)解決科學(xué)數(shù)據(jù)特征復(fù)雜不便識(shí)別的問題;以同網(wǎng)格結(jié)合的神經(jīng)網(wǎng)絡(luò)、誤差反向傳播的bp神經(jīng)網(wǎng)絡(luò)、自適應(yīng)多級(jí)自組織特征映像網(wǎng)絡(luò)為主的分類、聚類技術(shù)解決科學(xué)數(shù)據(jù)挖掘中的大規(guī)模知識(shí)發(fā)現(xiàn)問題。
This paper mainly introduces the image compressing technique in digital camera , consisting of universal image compressing techique , image compress algorithmic in the international still image compress standard jpeg2000 , jpeg2000 file format , soft validating of the algorithmics , and transplanting the algorithmic to digital signal processor 概括起來,本文的內(nèi)容主要有對(duì)圖像壓縮技術(shù)的熟悉、對(duì)jpeg2000壓縮算法原理的理解,對(duì)jpeg2000標(biāo)準(zhǔn)文件格式結(jié)構(gòu)的解釋,算法的軟件編碼驗(yàn)證,并設(shè)計(jì)相應(yīng)的dsp算法驗(yàn)證。
In view of the engineering practice of chmavc " s assistant materials management information system , this paper discusses some engineering problems relation to the design of a large database and to the application of database technology . exposition of two important aspects - - then design of a large database and improvement of database performance concerning practice is given . it includes the design of a data model , the compress technique of data , indexes set - up , optimization of inquiry , integrity check and security control 從工程實(shí)踐的角度,論述了為實(shí)現(xiàn)系統(tǒng)功能而在數(shù)據(jù)庫設(shè)計(jì)和軟件結(jié)構(gòu)設(shè)計(jì)中所采用的方法和技術(shù);并論述了為達(dá)到系統(tǒng)性能而在實(shí)現(xiàn)中所采取的各項(xiàng)措施,重點(diǎn)討論了大型數(shù)據(jù)庫的設(shè)計(jì)和改善數(shù)據(jù)庫性能這兩個(gè)重要方面,內(nèi)容包括設(shè)計(jì)數(shù)據(jù)模型、建立索引、查詢優(yōu)化、完整檢查和安全控制等。
Furthermore , in the second part , the author makes a deeply discussion and research on the design scheme of dalian tv station non - linear av editing network including the double - net framework , the digital compress technique , the virtual storage technique , the choices of digital compress format , the account of terminal stations , the manage functions and security of the system , etc . finally , in the third part , the author introduces the progress of non - linear av editing network in the future , showing the choices of compress format , software function , i / o interface , whole system of programming and broadcast , combining with internet and interactive tv , points out the direction of tomorrow tv technology system 在此基礎(chǔ)上,隨后在文章第二部分對(duì)大連電視臺(tái)的非線性視音頻編輯網(wǎng)建設(shè)從其核心技術(shù)與具體網(wǎng)絡(luò)設(shè)計(jì)方案進(jìn)行了詳細(xì)的闡述。其核心技術(shù)主要包括雙網(wǎng)結(jié)構(gòu)、數(shù)字壓縮技術(shù)、虛擬存儲(chǔ)技術(shù)等;具體網(wǎng)絡(luò)設(shè)計(jì)方案則包括數(shù)字壓縮格式的選擇、站點(diǎn)的數(shù)量及功能、系統(tǒng)的管理功能及安全性分析等幾個(gè)方面。文章的第三部分則主要通過壓縮格式選擇、軟件功能、上下載接口、制播一體化、與internet結(jié)合、交互電視等方面展開對(duì)電視臺(tái)非線性編輯網(wǎng)絡(luò)的發(fā)展的論述,指出未來電視技術(shù)系統(tǒng)的發(fā)展方向。