mixed video 中文意思是什麼
mixed video
解釋
復合視頻信與-
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。 -
Windows media encoder 9 series is a powerful tool for content producers who want to take advantage of the many innovations in windows media 9 series, including high - quality multichannel sound, high - definition video quality, new support for mixed - mode voice and music content, and more
Windows media編碼器9系列是一個強大的工具，對于希望充分利用windows media 9系列中的多項革新功能的內容提供商而言無疑是個福音，這些功能包括高質量多聲道音響高清晰度視頻質量新增對混和模式的聲音和音樂內容的支持以及其他更多功能。 -
The paper analysis the request lift movements of spots aerobics between domestic and foreign mixed paris project of recent years with relevant material, video statistics etc, the author finds the main problems appeared in our country and give some advise to the project in future, it can also give some reference to the project of mixed pairs
運用文獻資料法、錄像資料統計等研究方法，對近年來中外競技健美操混雙項目成套動作中的托舉動作進行數據對比分析，指出目前我國競技健美操混雙項目存在的主要問題，以及產生這些問題的原因，並提出一些未來發展建議，以期為我國競技健美操混雙項目的發展提供參考依據。
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