synchronized timing 中文意思是什麼
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Presently, the apon system adopts tdma as the access mode on the uplink. it requires not too much in terms of optical performance, but it requires more complex electronic equipment ( e. g., complex synchronized timing, ranging and delay control technolgies ) to avoid the collision of uplink information packets
目前apon系統在上行通道中採用時分多址的接入方式，它對光性能方面的要求不高，但它要求更復雜的電子設備，如要求復雜的同步定時、測距和延時控制技術，以避免上行信息分組產生碰撞。 -
For details below : 1 ) video changed from mpeg2 ps to mpeg2 ts 2 ) audio of ntsc format that can not be decoded by stb could be changed from dolby acs coding standard to mpeg1 / 2 layerll standard, and packed into mpeg2 ts format 3 ) well synchronized with audio and video by a new arithmetic " successive time stamp " this thesis made a introduction of mpeg2 standard in detail ; discussed the system timing model ; indicated the key during the transforming of video and audio ; especially explain how to deal with the pcr
2 ）針對目前機頂盒不能解碼的ntsc制式dolbyac3編碼演算法音頻信息，轉換成mpeg1 2layer編碼，並打成滿足mpeg2ts語法的信息包。 3 ）提出了能使音視頻達到良好同步的繼承性時間標簽打入演算法本文詳細介紹了mpeg2標準的語法，討論了mpeg2系統的時間模型從而指出視音頻處理中的關鍵，對pcr的處理進行了詳細的分析，提出了新的視、音頻同步演算法。
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