x
uploads/videophone.jpg

videophone 電視電話。

videotape

Based on the research of the performance , resource and exploit of the stromgarm cpu , general scheme of media control board of videophone based on embedded microprocessor strongarm and emebedded operating system windows ce is designed . it performs the customization of embedded operating system , and designs and develops the programs of system start - up , the driver of color lcd , standard rs232 serial port , serial mouse , ethernet boot loader , and so on 結合系統所使用的stongarmcpu分析了它的性能、資源、功耗等進行了分析,提出了基于嵌入式微處理器strongarm和嵌入式操作系統windowsce的可視電話的多媒體控制板的總體方案,對嵌入式windowsce進行了平臺定制,設計和開發了系統引導程序、彩色lcd 、標準r232串口、串口鼠標、 ethernetbootloader等驅動程序。

In the past twenty years , digital video compression technology has made great progress , and has accelerated the research and development of videophone , videoconference , digital tv , vcd / dvd , and etc . the mpeg standards established by iso / iec and itu have made great influence on digital video application 在過去的幾十年之中,數字視頻壓縮編碼技術取得了很大的進步,有力地促進了可視電話電視會議、數字電視、 vcd dvd等應用的發展。特別是國際標準化組織( iso )與國際電工委員會( iec )聯合制定的mpeg系列標準,產生了很大的影響。

In the videophone , conference call , dynamic monitor and human identification , there are more and more applications of human video object . it is worth studying location and analysis of head in theory and application . our paper studies the estimation and analyses of partial motion in detail and realize location and extraction of head 針對這些領域的應用要求,本論文以視頻圖象中頭肩區域為對象,研究視頻對象的運動分析方法、檢測靜止背景中人體(主要是頭肩)的運動方向和速度,實現頭部的定位與提取。

The paper introduces the technique of the recommendation on the basic frame , encoder and decoder ' s main technique and regulation , the syntax and semantics of the bitstream , optional coding algorithm , and etc . in the forth part of the paper , aimed the time - costest and most important technique - discrete cosine transform ( dct ) and motion estimate algorithms , paper analyses the classical and practical algorithms and introduce the theory . then paper sum up all the algorithms character , give out the ameliorated algorithm , and simulate with the c language on the computer . these two algorithm , can be realized using hardware and can be used into the real videophone ' s video module 論文的第四部分,針對可視電話中最耗費計算時間,也是其中最關鍵的技術? ?離散余弦變換( dct )和運動估計算法進行的仔細的研究,分析了當前出現的經典的實用算法,并對其原理進行了研究和介紹,并總結各種算法的特點和原理,各自提出了其的改進算法,給出了其原理介紹和實現方法,并在計算機上使用c語言進行了仿真試驗,并達到了較為滿意的效果,這兩種算法,完全可以通過硬件得以實現并能應用到實際的可視電話的視頻模塊壓縮算法中去。

Pearl international hotel is a three - star foreign hotel located in the flourishing commerce area of north gate of chengdu city . near railway station , and about 2 mins to city center . about 30 mins driving by car to airport , which is the best choice for your business and travel . room intro about 164 guestrooms , deluxe room and suite . all rooms allocate the international satellite tv system , international and domestic videophone , broadband network , minibar , environmental protection refrigerator , insurance box , etc 成都明珠國際酒店擁有164間套不同類型豪華客房和套房,設有國際衛星電視系統國際國內直撥可視電話及寬頻網迷你吧環保冰箱保險箱等,服務快捷周到,是你舉辦大型會議及旅游出差下榻成都的理想之選。

Our company provide connectors , which are widely applied to computer mainframe , lcd , telecomunication card , storage , moving harddisk , card reader , digital camera , mp3 , pda , liquid crystal television , switchboard , cardalarm , videophone , cordless telephone , and all kinds of communication products 我司提供連接器產品,廣泛應用于計算機主機板、液晶顯示器、電訊卡、存儲器、移動硬盤、讀卡器、數碼相機、 mp3 、 pda 、液晶電視、交換機、汽車防盜器、可視電話、無繩電話及各種通訊設備產品上。

With advances in communication and information processing technologies , the video - driven application show a very large degree of flexibility and extensibility . visual communication is the fastest growing vehicle for information . a lot of digital applications and services are emerging , such as : digital tv , teleconference , videophone and interactive multimedia 隨著通信和信息處理技術的發展,基于視頻的應用呈現出強大的靈活性和可擴展性,視頻通訊已經成為增長最快的信息載體,大量數字化的視頻服務需求不斷涌現,如:數字電視、遠程會議、視頻電話和交互式多媒體等。

It has put forward a kind of method of self - adaptation based on motion characteristic to correcting error code . finally , based on the rtp protocol , real - time transmission of video and audio data is realized with software , and a bandwidth control algorithm based on rtp is introduced . the research results of this paper can be used in the long - distance education , video conference , videophone , video real - time control , and various kinds of communication systems 接著討論了糾錯編碼,采用rs編碼作為前向糾錯碼,提出了一種基于運動特征的自適應誤碼掩蓋方法,并采用rtp協議進行視音頻數據的實時傳輸及帶寬控制,本文的研究成果可以直接用于遠程教育、視頻會議、可視電話、視頻監控等各種通信系統,具有較大的研究價值及廣泛的實用價值。

The videophone , which combinewiths the computer ’ s alternation , the communication ’ s distribution , and the multimedia ’ s real - time characteristic , is accepted by more information and timely responds . the research work of the videophone system includes the developments of the hardware and the software 可視電話系統正是以這種信息多元化、響應及時化等特點頗受大眾接受,它將計算機的交互性、通信的分布性和多媒體的實時性完美的結合起來。

Then this paper discusses function and structure of h . 324 videophone , and designs and realizes media control protocol h . 245 , and realizes state machine of signalling entity , finally , it analyses wide prospect of application for the embedded system based on windows ce 隨后,分析了itu - t的h . 324可視電話的功能結構,設計和實現了多媒體控制協議h . 245 ,實現了信令實體的狀態機,最后分析了基于windowsce的嵌入式系統的廣泛的應用前景。

The itu has brought out a serial of recommendation for the videophone , but the video part of the videophone is the most difficult question puzzled all the technicians of the world 但是國際電信聯盟為了可視電話的實用化,相繼提出了一系列適應電信傳輸信道和技術水平的可視電話和會議電視建議。但是由于可視電話中視頻部分的技術難題始終是個困擾全世界視頻壓縮技術工作者的難題。

This paper introduces the latest development of multimedia communication technology . the design framework of videophone system on atm broadband network is given and several key technologies are presented in detail 首先介紹多媒體通信技術的最新發展,然后討論多媒體通信系統的設計和實現,給出基于atm網絡的寬帶多媒體可視電話系統設計框架及其關鍵技術。

Therefore the research of very low bitrate image coding has great significance . the author takes part in the research of the codec of isdn videophone in shanghai bell company and discusses the image coding algorithms in detail 作者參與了上海貝爾videophone項目組的isdn可視電話中的編碼器的研究,主要對其中的視頻編解碼算法作重點研究和探討。

But the paper has not studied the other parts of the compression recommendation detailedly , especially the optional mode can improve the videophone mostly , which wait for the further research and works 但是論文對于可視電話的壓縮編碼協議中的其它部分還未進行仔細的研哈爾濱工程大學碩士學位論文究和實現,尤其是h

The bandwidth of the copper in addition hawser itself is limited , and placed restrictions on many media need to access the broad width network : like videophone , large data transmitting , videotext etc . 再加之銅纜本身的帶寬有限,限制了許多需要較大帶寬的業務的接入:如可視電話、大容量的數據業務、可視圖文等等。

With the development of videophone / video conference , digital tv , vcd / dvd , and etc , the video coding has gradually become the common research field of academic and industrial groups 隨著可視電話/電視會議、數字電視、 vcd / dvd等應用的發展,視頻壓縮編碼技術已經成為學術界和產業界普遍關注的熱點。

With the progress of society and rapid development of technology , people ' s needs for broadband services , such as video - on - demand , videophone and internet , has been expanding 隨著社會的進步和技術的飛速發展,人們對視頻點播、可視電話、互聯網等寬帶業務的需求不斷增大。

The new service , a twist on videophone products which have been around for years , will enable users to transmit and receive their images as they communicate 這一新的服務項目是從可視電話上演化而來的,它容許用戶們在通訊時同時接收到對方傳來的圖像。

Many new digital applications and services are emerging such as digital tv , teleconference , videophone , and image - based interactive multimedia 數字化的應用和服務正大量涌現,如數字電視,遠程會議,視頻電話和基于圖像的交互式多媒體等。