video carrier 中文意思是什麼
video carrier
解釋
視頻載波-
The video signal is directed to the crt through a sound trap which eliminates the sound-carrier frequency.
視頻信號通過聲音陷波電路，消除聲音載波頻率，直達CRT。 -
The digital watermark technology research is precisely developing rapidly under such kind of application request. the digital watermark is divided into text watermark, image watermark, audio frequency watermark and video frequency watermark from the carrier situation. at present, the digital watermark technology research has obtained the quite gratifying achievement already and its application already permeates many aspects of life
本論文先後介紹了數字水印、視頻數字水印的一些基本概念和相關情況，以及視頻水印方案的一些典型演算法;著重針對數字水印在電視領域的應用，闡述了應用於廣播監控的解決方案以及相應的水印嵌入和提取演算法。 -
The video signal is directed to the crt through a sound trap which eliminates the sound - carrier frequency
視頻信號通過聲音陷波電路，消除聲音載波頻率，直達crt 。 -
Acent video carrier
鄰頻道圖象載波 -
In this paper, chroma dc coefficients are selected as the carrier data because chroma dc coefficients are robust. also, alterable steps are used to select one part of the coefficients, so the watermark is imperceptible ; before watermark embedding, the watermark is divided into many parts, every part is individually embedded into one gop of the video, even if a gop is destroyed, the watermark can be extracted correctly, this methods promotes the robustness of the watermark ; in addition, in order to promote the security of the watermark, the user ' s id and password are used to generate chaos sequence by the chaos system which is created in this paper, later, watermark is mixed by the chaos sequence. also, the embedding position of the watermark bit is modified by one chaos sequence, so, unauthorized person can not extract or remove the watermark, since the embedding position is unknown
本文認為，色度dc系數是魯棒性非常好的參數，因而選擇色度dc系數作為水印信息載體，同時，採用可變的步長選擇部分系數，保證了水印的隱形性；在嵌入水印時，本文採用水印信息「網格劃分」 、各子塊獨立嵌入視頻的方案，由於水印信息子塊是相對獨立的嵌入視頻中的每一相對獨立的圖組當中，即使某一圖組收到一定破壞，也能夠恢復水印信息，使水印的健壯性得到提高；此外，為了提高水印信息的安全性，在嵌入水印信息時，根據用戶輸入的id號和密碼，利用本文構造的混沌系統產生的混沌序列對水印信息進行變換，同時，對每一水印信息比特的嵌入位置也採用了偽隨機序列進行調整，這樣，未授權用戶不能提取水印信息，也難以擦除其中的水印信息，因為嵌入的位置是未知的。 -
The sounds and images are converted into electrical signals by a microphone ( sounds ) or video camera ( images ), amplified, and used to modulate a carrier wave that has been generated by an oscillator circuit in a transmitter
聲音合圖像由話筒（聲音）或攝像機（圖像）轉換為電子信號，經過放大后，用來調制發射器中一個振蕩器產生的負載電波。 -
It is reported that the commercial - use video conference network to be built by unicom will use ip - based h. 323 networking technology. user - self - sustained video conference service will be made available to institutional users by setting up rich operation support system as well as carrier network and access network with guarantee for service quality
據介紹，中國聯通建設的商用會議電視業務網將採用基於ip的h 323組網技術，通過組建有服務質量保證的承載網和接入網以及豐富的運營支撐系統，為集團商業用戶提供用戶自理的會議電視服務。 -
These years, with the development of network technology, broadband access became necessary to applications in home network, and it is the one that carrier company wants to push on. currently, adsl, xdsl, fttb and cable modem still have some distance to people ’ s requirement, since they ca n ' t offer enough performance and quality to net - meeting, vod and voip. ngn ( next generation network ) is open network that could provide very new services, such as audio, video and data
近年來，隨著網路技術的迅猛發展，寬帶接入逐漸成為很多家庭應用的必要設施之一，它也是電信運營商大力推廣的應用手段，當前廣泛使用的寬帶接入方案如adsl ，小區寬帶， xdsl和cablemodem與人們的需求還有一定差距，也不能為新興網路業務如視頻會議、 vod 、 voip提供足夠的帶寬以及相關業務的性能和質量保證。 -
Hfc applies the sub - carrier fdm technology, with video, data and voice signals simultaneously transmitted on the coaxial cable via the modem
Hfc採用副載波頻分復用方式，各種圖像、數據和語音信號通過數據機同時在同軸電纜上傳輸。
分享友人