媒質帶寬 的英文怎麼說
中文拼音 [méizhídàikuān]
媒質帶寬
英文
medium band-
Indoor wireless optical local area network ( wlan ) has advantages of wide bandwidth, strong anti - jamming and good handiness. it is the best resolution for future communications : mobility, personality, and multimedia application, and will have wide applying foreground. how to use the network bandwidth resource fairly and effectively is key to qos guarantee
在室內無線光通道中，如何公平、高效地利用網路帶寬是保障局域網通信可用性、可靠性和服務質量的關鍵所在，也正是無線光局域網媒質接入控制（ mediumaccesscontrol ， mac ）協議需要解決的核心問題。We study the cost of metro wdm in two aspects in chapter 2. for the aspect of components, a bidirectional optical add - drop multiplexer ( boadm ) using fiber gratings and circulators is designed, and is cheaper, simple and appropriate compenent for single - fiber bidirectional ring networks ( sfbrn ). for the aspect of network, after study the traffic - grooming problem and the cost of wdm ring networks, a layered network with a multi - hubs is presented to reduce the total number of the network ports
在第三章，我們搭建了一個可以實現多業務單纖雙向傳送的sdh wdm網路平臺，以單根50km光纖作為物理媒質，以mux demux的為單纖雙向復用器件，以sdh wdm為傳輸手段，採用mstp技術，通過接入vlan模塊建成一個單纖雙向傳輸的局域網，並以此為基礎通過接入圖像編解碼器實現單纖雙向視頻傳輸，為城域寬帶接入網的多業務實現提供了範例。A multimedia proxy server model is proposed based on the layer - encoding model. the server model makes the server ' s cache be used effectively and can adapt the changing of network bandwidth. in the server model, the data quality of a program stored in the server ' s cache, is directly related to the requesting frequency and requested bandwidth of the program
本文提出了一套基於分層編碼模型的多媒體代理服務器模型，該模型能自動適應國防科學技術大學研究生院學位論文工nternet中的帶寬變化，充分利用代理服務器的cache空間，並使cache中緩存的多媒體數據質量與其點播頻率和點播帶寬成正比。The characteristic and key technologies of the system are as follows : ( 1 ) in realizing the live broadcast of audio and video, the problem of immense multimedia data and low networks bandwidth utilization ratio is solved by using mpeg - 4 as format of audio and video data. audio and video data are collected by video card cv500 which developed by beijing sum tone company ; meanwhile, the contradictory between the delay of networks transmitting and the quality of the image is well solved by setting a " bi - buffer area "
系統實現中解決的關鍵問題和特色主要有以下幾個方面： （ 1 ）在視音頻直播功能的實現中，通過使用北京算通公司的cv500視頻採集卡和cv500sdk進行視音頻數據採集，並採用當今最新的圖像和語音編碼壓縮標準mpeg - 4作為視音頻數據的採集格式，既保證了圖像的質量，又大大縮減了視音頻所佔的帶寬，從而解決了多媒體數據量大、網路帶寬利用率低的問題；同時，通過設置環形緩沖區的辦法來調和網路傳輸延時與圖像質量之間的矛盾，取得了較好的效果。Experimental result demonstrate that the method mitigates the impact of bandwidth variety and is also improves the quality of multimedia transmission service
實驗表明該方法解決了有效帶寬變化對視頻傳輸的影響，很大程度上提高了多媒體傳輸的質量。Providing a novel access scheme for solving “ last mile ” wideband access and global person communications. in wireless optical code multiple access ( w - ocdma ) network, media access control ( mac ) is a key issue, which determines network performance 、 bandwidth efficiency 、 complexity and cost of terminal
無線光碼分多址（ w - ocdma ）接入網中，數據鏈路層的媒質接入控制技術（ mac ）至關重要，它直接影響網路的性能、帶寬利用效率、終端設備的復雜度和成本。Aimed at the quality of service required by real - time service, an effective bandwidth calculating method for self - similar traffic is presented to provide guaranteed packet loss probability and maximum delay
摘要針對多媒體實時業務需要提供特定服務質量的情況，給出了一種能夠同時保證分組丟失概率和最大延時的自相似業務等效帶寬計算方法。Realnetworks has formulated a specification for audio and video compression, known as realmedia. it is a multimedia application standard for the cross - platform clientserver structure, which prevails over the internet. it uses audiovideo streams and synchronous playback technologies to provide the best quality multimedia on a full broadband basis, and stereophony and continuous video at the transmission rate of 28. 8 kbps over the internet
Realnetworks公司所制定的音頻視頻壓縮規范稱為realmedia ，是目前在internet上相當流行的跨平臺的、客戶服務器結構的多媒體應用標準，它採用音頻視頻流和同步回放技術來實現在intranet上全帶寬地提供最優質的多媒體，同時也能夠在internet上以28This method may effectively improve the quality of real - time transport of multimedia data with a little cost of computation under the situation of limited bandwidth, high packet loss rate and high packet error rate
這個技術可有效的改善多媒體應用在帶寬資源緊缺的網路及丟包率和包錯誤率較高的網路中的傳輸質量。Mechanism and difficulty of current real - time transport technology are analyzed in this article, technologies such as multicast, real - time transport, resource reservation and error correction code technologies are studied in this dissertation. a method of improving the quality of real - time transport of multimedia data on network on where packet loss rate and packet error rate are high is provided
本文分析了現有網路數據實時傳輸的機理及面臨的困難，研究了多播、實時傳輸、資源預留以及糾錯編碼等技術在實時傳輸中的應用，給出了在低帶寬、包錯誤率和丟包率較高的網路中提高多媒體數據實時傳輸質量的方法，提出了帶動態糾錯編碼的實時傳輸技術。The first is the need of wide bandwidth, the second is the high real time need and the third is the gusty data. however, the status of current network is narrow bandwidth, unpredictable delay while transmitting multimedia data, and appearing the phenomenon of losing package
而當前的網路狀況是網路帶寬不夠高，傳輸多媒體數據時還會有不可預知的延遲，而且目前的網路質量還不可避免地出現丟包現象。Based on the research of videoconference systems of h. 323 protocol over ip networks and the author ' s experiences of implementing h. 323 videoconference systems in remote education area, in this thesis the main factors that affect videoconference quality are analyzed, and a dynamic bit rate allocation model is proposed and partly implemented. this model is designed to dynamically allocate bit rate for multi - media data flow ( including audio data and video data ) in fixed bandwidth network environment. when continuous multi - media packet losses are detected in ip based h. 323 videoconference system, the bit rate of video data is adjusted meanwhile the bit rate of audio data remains unchanged, and the bit rate allocation of multi - media data ( including audio data and video data ) is optimized as a whole effect
本文結合作者在h . 323視頻會議系統應用於遠程教育的經驗，通過對現有的基於ip網路的h . 323協議視頻會議系統的研究，分析了影響視頻會議質量的原因，提出並部分實現了在固定帶寬的網路環境下，基於ip的h . 323視頻會議的多媒體數據包發生丟包、抖動或延時時，保持音頻數據位速率不變，通過對視頻數據的位速率的進行調整，最終實現旨在提高視頻會議語音質量的多媒體數據位速率動態調整的模型。The format allows streaming of video ( on - line video, internet tv ) with low bandwidths. because of the low bandwidth priority, quality is often reduced
這個格式支持低帶寬的流媒體（在線視頻、網路電視） 。由於它可以滿足低帶寬的用戶，質量通常不盡人意。With the rapidly development of multimedia signal compression and broadband networks technologies, methods of transmitting high - quality multimedia information via networks have become one hottest point of it technologies
隨著多媒體信息壓縮技術和寬帶網路技術的快速發展，通過網路傳輸高質量的多媒體信息已經成為信息技術領域研究的熱點之一。How to improve the quality of service for multimedia data on condition of bandwidth limit is the hotspot of research in multimedia application field recently
如何在帶寬有限的條件下盡可能提高多媒體數據特別是視頻圖像的傳輸質量，是當前網路多媒體應用領域的研究熱點。Although internet data center ( idc ) has not an authoritative definition, it has a deeper connotation than traditional data center. with the development of internet, it arises to supply icp, enterprises, media and all sorts of web sites with the businesses that large - scale, high quality and security, professional servers trusteeship, space rent, network whole sale band width and asp
雖然網際網路數據中心（ idc ）還沒有一個權威的定義，但它比傳統的數據中心有著更深層次的內涵，它是伴隨著網際網路不斷發展的需求而發展起來的對為icp 、企業、媒體和各類網站提供大規模、高質量、安全可靠的專業化服務器託管、空間租用、網路批發帶寬以及asp等業務。But the traditional internet model of c / s communication makes the streaming quality unsatisfactory because of the limitation of server ’ s performance and bandwidth. ip multicast remains just a research commodity with limited penetration into commercially deployed internet because of the problems of technology and market
但是傳統的c / s模式的流媒體服務系統由於服務器性能和服務器端的帶寬資源有限，在很大程度上阻礙了流媒體業務質量的提高和容量的擴大。With the development of the multi - medium and networks technology, people has put forward the higher requirement at quality dimension and application in digital image, wanting to use limited space and bandwidth resources to transmit a big image and according to the real needs to gain the reconfiguration image of different resolution or qualities
隨著多媒體技術和網路的發展，人們對數字圖像在質量、大小和應用方面提出了更高的要求，希望能用有限的空間和帶寬資源存儲與傳遞大尺寸圖像。並且，根據實際需要，獲得不同解析度或質量的重建圖像。分享友人