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signal code 信號密碼。

signal corps

When the speech signal coding is at 8kb / s and 9 . 6kb / s , its understanding and definition are quite satisfaction . completely achieve the common telephone effect . only in the shade of naturalness . when the speech signal coding is at 4kb / s and 4 . 8kb / s the voice transmission result is as good as that of the ordinary telephones 本文所設計的q4401應用電路,在語音壓縮速率為8kb s和9 . 6kb s時,其語音質量在可懂度和清晰度方面均十分滿意,完全達到了普通電話的通話效果,僅在自然度方面略顯遜色。

Secondly , we apply tk operator to the cross - correlation of received signal code and pn code to separate the multi - paths . it comes to a conclusion that tk operator can separate the multi - paths within less than the chip period accurately of spread - spectrum system with space - modulation by simulation . at last , we apply this algorithm to the practical signal collected by gps tap , and from the result we can drop a conclusion the tk algorithm is practical 本文首先闡述了時空調制擴頻信號原理以及在多徑干擾下時空調制接收機的性能和teager - kaiser接收機的原理;接著對時空調制擴頻系統的解調信號與偽碼的互相關函數采用tk接收機進行多徑分離,仿真結果表明, tk接收機對時延在一個碼片內的時空調制擴頻通信多徑信號有很好的分離效果;最后用數據采集器對一個gps信號進行接收和多徑的估計,驗證了該算法在實際的運用中對多徑的擴頻信號有很好的分離效果。

2 . reseach different methods and steps carried out including discrete cosine translation , run - length enconding and haffman encoding about signals coding and decoding . the signal - coding structure diagrams and programmable flow charts are not only established but also the applide program about signal coding and decoding is complied on vc developable flat 研究了信源編解碼的各種方法(包括dct 、游程編碼和哈夫曼編碼等)以及實現的步驟,建立了信源編碼實現的結構圖和程序流程圖,并在vc的開發平臺下,編制了信源編解碼實現過程的應用程序。

Multiplexing and conversion of mpeg - 2 are important technology in present broadcasting network . mpeg - 2 is a generic standard about motive video and associated audio signal coding , which has been described by motive picture expert group Iso發布的mpeg系列標準為廣播電視節目格式的規范提供了可能,其中, mpeg - 2碼流的合成與轉換是目前廣播電視行業的重要技術。

The research on carrier spectrum , modulation schemes and signal codes of plc networks has received much attention , while the mac protocol of plc networks is usually adopted from general - media computer networks 目前國際上注重研究plc網絡的載波頻率、調制方式、信號編碼等關鍵技術。而對于plc網絡的mac協議,卻通常采用修改的常規計算機網絡的mac協議。

This article elaborated the code technology in the correspondence application , discussed in the discrete signal code process function , as well as code technology security use and error correction function 摘要本文論述了編碼技術在通信中的應用,討論了離散信號的編碼過程中的作用,以及編碼技術的保密用途和糾錯功能。

Chapter two describes the system ' s communication protocol and signal coding 第二章主要講述了智能控制及安防系統的通信協議和信號編碼。

Position signal code 位置信號碼

Abbreviated signal code 縮寫信碼

Three letter signal code 三字母信號碼

Alternating current cab signal code 機車信號交流電碼

The meaning of abnormal signal code 讀卡機異常訊息代碼之意義

Study on signal coding mode of twacs 工頻通信系統信道編碼的研究