2 . when the existed dynamic bit rate allocation algorithms is working , the video data bit rate and the audio data bit rate are changed 2 )已有的動態(tài)速率調(diào)整算法在進行動態(tài)速率調(diào)整時,音、視頻的位速率都要改變。
Comparing with the existed dynamic bit rate allocation algorithms , the model can provide better audio data quality by adjusting the video data bit rate . this meets the requirement in remote education system 本模塊只對視頻位速率進行調(diào)整,保持音頻位速率不變,保證音頻質(zhì)量,在一定程度能滿足遠程教育的需要。
Resemble with the digital watermark methods of the other media such as still image and video , digital audio watermark must account for some problems which consist of perceptual transparency , data bit rate , robustness , security and real - time etc . the robustness of watermark is vital to the practical application , which requires the watermark providing with significant data since it suffered from some intended attacks or unintended revisal 與靜態(tài)圖像、視頻等數(shù)字水印方法類似,音頻水印的研究主要須解決感知透明性、數(shù)據(jù)嵌入率、魯棒性、安全性以及實時性等問題。水印算法的魯棒性對于實際應用來說是至關重要的,它要求數(shù)字水印在遭受有意的攻擊或無意的修改后,仍能提供有意義的數(shù)據(jù),這一性能對版權保護的應用顯得尤為突出。