光學儲存為現今主流的儲存技術，其中全像光學儲存更可將儲存 容量提高至100GB，但由於全像光學儲存有過多雜訊源而限制其儲存 容量，藉由編解碼過程可降低錯碼率提昇儲存容量，本論文研究全像 儲存系統中的各種編碼方法，並提出一新型灰階編碼概念，不同於以 往的文獻，是利用其忽略不用的二維偵測器之像素深度來做編碼。新 型灰階編碼的優點為碼率R≈1，且可與其他編碼結合使用於全像儲 存系統中。 本實驗中建立一套測試錯碼率的系統，將RS 碼、平衡區塊碼和新型 灰階編碼之編解碼程式撰寫完成，並測試了兩種編碼與未編碼的圖 形，測試結果顯示，未編碼的資料錯碼率約為2.71×10−5；RS 碼和6:8 平衡區塊碼經測試得到錯誤的位元數為零，計算出錯碼率為零。Optical Storage is the major of the current storage technology. Holographic data storage can enhance the storage capacity to 100GB. But, holographic data storage has excessively many noise to limit its storage capacity. Coding processing can reduce the BER to a sufficiently low level, and improve storage capacity. This thesis studies on holographic data storage system each code method, and proposes the concept of New gray-scale code. This method is different to the former literature, uses the pixel depth of the two-dimensional detector to make the code. The merit of New gray-scale code is that the code rate approaches one (R )，New gray-scale code also can be using in holographic data storage system with other code. ≈1 This experiment establishes testing the wrong code rate system. The decoding programs of RS codes and Balance block codes and New gray-scale code be written. We also test two kind of codes and not the encoded graphs. The result showed uncode data wrong code rate approximately is , the error bits of the RS code and Balance block code both are zero (BER=0).
