A digital image watermarking algorithm based on quadtree and error correcting code 基于四叉樹和糾錯編碼的數(shù)字圖像水印算法
Error correcting codes 錯誤糾正代碼
In order to improve watermarking robustness against distortions and attacks , it is natural to envision the use of error correcting codes ( ecc ) 為了改進水印抵抗失真和攻擊的魯棒性,利用糾錯編碼是很自然地被想到的。
Then it is dicussed that how to capture and play and synchronize the video and audio data with software . error correcting code are also discussed , the rs code has been used to correcting code 然后研究了如何用軟件的方法實現(xiàn)視音頻數(shù)據(jù)的采集與播放,并討論了視音頻數(shù)據(jù)的同步問題。
Both quantum error correcting code and quantum error avoiding code are practical quantum channel coding schemes . we present in this dissertation a new quantum error correcting code scheme , named serially concatenated quantum convolutional code 克服量子信道噪聲的編碼就稱為量子信道編碼,實用的量子信道編碼包括量子糾錯碼和量子避錯碼。
Meanwhile , a looking - up database method used for yielding pdf47 error correcting codes has been developed , which makes it easier and more accurate to compute the coefficients of the generating polynomial and results of syndrome polynomials 同時提出一種適用于pdf417糾錯編碼和譯碼的查表方法,可以簡單確定任意碼字在gf ( 929 )內(nèi)所對應(yīng)的本原元的冪次。
Reed - solomon code , a powerful error correcting code for burst and random errors , is widely applied to deep space communications , mobile communications , disk array , digital video broadcasting system , and so on Reed - solomon (簡稱rs碼)是一種具有很強的糾正突發(fā)和隨機錯誤的信道編碼方式,在深空通信、移動通信、磁盤陣列以及數(shù)字視頻廣播( dvb )等系統(tǒng)中具有廣泛的應(yīng)用。
The scheme of implementation of error correcting codes is proposed for the vhf / uhf software radio transceiver , which consists of bch encoder , tcm encoder , interleaver in the transmitter and their counterparts in the receiver : bch decoder , viterbi decoder and deinterleaver 該部分包括發(fā)射端的bch編碼、 tcm網(wǎng)格編碼、交織,以及在接收端相對應(yīng)的bch譯碼、 viterbi譯碼、解交織等。
However , performance is limited by the low signal - to - noise ( snr ) and high date rate . a potential solution is to add a strong error correcting code . so studying the error correcting code on uwb system is necessary and worthy 但是超寬帶信號頻譜寬、功率低且傳輸速率很高,使其更容易受到各種干擾而影響傳輸質(zhì)量,所以在超寬帶系統(tǒng)中研究信道編解碼技術(shù)變得非常必要和有價值。