video bandwidth 中文意思是什麼
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This paper refers to several creation in compatibility with large volume of fed display and conversion of different video signal. it firstly used special central chip al300, designed correlative circuits, successfully developed vga full - color fed console system, compatible with resolution 1280 1024, achieved functions such as multi - video signal conversion and interleaving, met vga ’ s resolution of fed. it firstly designed and fabricated vga interface and separated video interface - - s - video, converting several video signals to 24 bits full - colored digital image signal in fed driving system, achieved separation of luminance signal and chromatism signal, enhanced the bandwidth of luminance signal
首次採用平板顯示專用控制晶元al300 ，設計並製作了相關配套電路，支持的最高解析度是1280 1024 ，實現解隔行和多種視頻格式轉換的功能，滿足了fed顯示屏對vga解析度的要求。首次在基於fpga的vga級彩色fed控制系統中設計並製作了vga介面和分離電視信號s - video介面，可以將多種視頻信號變換為fed驅動系統可用的24位彩色數字圖像信號，實現亮度信號和色差信號的分離，提高了亮度信號的帶寬。 -
According to the characteristic of ieee 1394 with wide bandwidth, common and real - time, the author put forward ieee 13 94 should be applied into real - time digital video transfer in optics - electronics theodolite. before engineering realization, carried out a video image transfer test on three types of digital video tape recorders and camera with ieee 1394 interface. we found that digital videos without compression transfered under ieee 1394 standard ( transfer from 4. 5m to 100m ), compared with analog videos, have no geometric distortion, and have better luminance, contrast, definition
作為工程實現前的實驗研究，對三類具有ieee1394介面的數字錄像機和攝像機進行了視頻圖像傳輸實驗，發現無壓縮格式的按ieee1394標準傳輸的數字視頻圖像（傳輸距離從4 . 5米到100米之間） ，較原始模擬視頻圖像在幾何位置信息上沒有衰變，而在亮度、對比度、邊緣清晰度這些方面有明顯的優勢；但是按dvcam壓縮格式（常見于sony公司的系列產品，是5 ： 1的dct幀內壓縮）壓縮的數字視頻圖像，較原始模擬參照圖像有明顯的幾何畸變。 -
By directed acyclic graph model, video server can select correct substreams by network bandwidth and terminal capability to get any frame rate, spatial resolution but coarse granular scalability presentation of video
通過該模型，視頻流媒體服務器能夠根據網路帶寬，終端能力，正確地選擇子碼流進行傳輸播放。 -
On the internet, multimedia services such as streaming media, video / audio conference, voice over ip and video on demand, become more and more important, end - to - end data transmission or unicast ca n ' t be competent for the task which have the characteristic of one - to - many transmission. if we use unicast, the server has to offer the packet with same context for each connection, which will consume too much bandwidth. then the broadcast is alternative selection for us to deliver data in the lan, as we known, when broadcast technology used, all the pcs in the lan will receive the broadcast packets regardless that you would like to or not
點對點傳輸的單播方式不能適應此業務的傳輸特性（單點發送多點接收） ，這使得服務器必須為每一個接收者提供一個相同內容的ip報文拷貝，並在網路上重復地傳輸相同內容的報文，這必然佔用大量網路資源。雖然ip廣播允許一個主機把一個1p報文發送給同一個網路的所有主機，但是由於不一定是所有的主機都需要這些報文，這又可能浪費大量網路資源。 -
But the bandwidth of the raw radar video is too wide to transmit directly in the common communication channel
但是雷達原始視頻信號頻譜很寬，要求傳輸設備有很寬的通頻帶，而且效率低、投資大。 -
When the bandwidth changes, audio and video will find the best transmission combination from the multi - coded file. with the change of the bandwidth, the server can modify the number of messages to be transmitted
當帶寬改變時，影音的傳送會從這個多重編碼文件中找出最佳的傳送結合。服務器可以因帶寬的改變而更改資料傳送的數量。 -
Because mpeg video need more storage space ( though achievements in compression algorithms have decrease it to a reasonable degree ), high transmission bandwidth, low transmission delay and delay jitter ( especially to real - time video ). how to guarantee video transmission qos ( quality of service )
如何在寬帶ip和atm網路上有效地傳輸mpeg視頻，才能有效地保證視頻傳輸的服務質量參數qos （如延遲、延遲變化等） ，以及用戶終端表示的表現質量參數qop ，一直是近年來學術界研究的熱點。 -
The system is developed by ourselves on the basis of the project which is titled. multimedia broad bandwidth network engineering and been responsible by the author of this thesis. the hfc network transmission based techniques of internet dual access, user set - top - box access, stock broadcasting, standard video broadcasting, distant education, etc. are addressed. this system can provide information highway to telecommunication and tv broadcasting to run multimedia services and be suitable for the status of our nation and the economic burden of our public
本論文以作者負責的項目「山東勝利油田多媒體寬帶網路工程」為背景，闡述了本單位自主開發的「基於hfc網路多媒體寬帶傳輸系統」的原理、功能和技術特點，論述了基於hfc傳輸網路下的： internet雙向接入技術和用戶端機頂盒接入技術及股票發送、準視頻廣播、遠程教育等高速數據廣播技術在hfc網路工程中的實現，說明了該系統能夠為電信和廣電全面開展多媒體增值業務提供一套適合我國國情、滿足我國公眾經濟承受能力的信息高速公路完整解決方案。 -
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。 -
Select bandwidth for streaming video
請選擇錄像串流的頻寬： -
As high - bandwidth services such as interactive tv, video applications, on - line game, etc., being the future applications at office and home, evolution of access network becomes an absolutely imperative task
摘要隨著高頻寬服務（例如交互電視、視訊、線上游戲等）的應用發展，為提供企業客戶與一般家庭客戶網路連結的接取網路面對著不得不變的重要挑戰。 -
Analog video bandwidth
模擬視頻帶寬 -
Transmission of real - time video typically has bandwidth, delay, and loss requirements
實時流的傳輸通常對網路帶寬、時延和丟包率有較高要求。 -
In order to keep the signal transmission unfailing, bch error - correcting code is applied in the system. this kind of system does n ' t affect the application television broadcasting normally and does n ' t increase video signal bandwidth additionally. it optimizes the transmission circuit for control signals and solves the problem of time - delaying, thereby it promotes the transmission more efficiently and economically
這種新型的應用電視在不影響電視正常播放和不增加電視傳輸帶寬的前提下，將控制信號搭載在視頻信號通道上運行，優化了控制信號傳輸線路，解決了時延問題，達到了利用電視信號逆程資源的目的，真正意義上實現了單纜傳輸監控系統，促進了監控系統的高效化和經濟化。 -
Dividing the evaluation of network - nle system into four subjects : video quality unit, network bandwidth unit, software function unit and system stability unit. thus, the evaluating and testing method has been developed based on further standardization and specification
嘗試將非編網路測試分為視頻質量單元、網路帶寬單元、軟體功能單元、系統穩定性單元等四個項目，並進行了規范化和細化，提出了改進的測試評估方法。 -
Owing to its fast development and innate broadband nature, digital tv systems, especially hfc / catv networks, are competitive candidates for broadband access networks, which meet the bandwidth requirements of convergence of video, voice and internet data services
同時，數字電視系統的飛速發展和固有的優點，成為提供網際網路接入業務的有力競爭者，特別是我國的有線電視網（ catv ）擁有巨大的網路資源。 -
In the part 2 of advanced audio video coding standard avs - p2, many efficient coding tools are adopted in motion compensation, such as new motion vector prediction, symmetric matching, quarter precision interpolation, etc. however, these new features enormously increase the computational complexity and the memory bandwidth requirement, which make motion compensation a difficult component in the implementation of the avs hdtv decoder
在avs - p2中傳統的運動補償技術被進一步改進以獲得更好的編碼性能。這些新的特性包括：預測塊大小可變化1616到88基於矢量三角形的新型mv預測多參考幀最多2幀或4場直接或對稱模式匹配不限制的mv和1 4精度像素插值等。 -
High - effective and low - cost memory system the demand for bandwidth and response time of video decoder is analyzed, a high - effective and low - cost multi - entity interlaced ddr sdram controller design and relevant address mapping scheme is proposed
高效低成本的存儲系統設計本文分析了avs和h . 264解碼器對存儲系統帶寬和響應速度的要求，針對ddrsdram延遲長、多bank的特點，設計了一套高效的多體交錯式ddrsdram控制方案和相應的地址映射方式。 -
And it has significance in multimedia communication, digital multimedia broadcast and portable consumer electronics etc. the real - time implementation of video coding requires very high computation power and memory bandwidth
它面向移動多媒體應用，對新一代移動多媒體通信、數字多媒體廣播、便攜式視聽消費電子產品等產業的發展具有重要意義。數字視頻數據壓縮的實時實現對處理器的計算能力和帶寬要求很高。 -
This method is especially suitable for small mobile devices such as handheld pcs, palm - size pcs and mobile phones that possess small display screens and light computational power, and work in low bandwidth wireless networks. the system rtbvideo based on the technique mentioned above typically provides qcif - size video with a frame rate of 5 - 15 fps for a 9. 6 kbps bandwidth in the internet
在上述技術的基礎上開發的基於internet網際網路的實時視頻傳輸系統rtbvideo ，能夠提供格式為qcif （ 176 144 ）的視頻，人體輪廓清晰，畫面穩定流暢，且在9 . 6kbps帶寬下能達到每秒5 - 15幀。
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