| DC 欄位 |
值 |
語言 |
| DC.contributor | 通訊工程學系 | zh_TW |
| DC.creator | 邱韋堯 | zh_TW |
| DC.creator | Wei-yao Chiu | en_US |
| dc.date.accessioned | 2009-7-7T07:39:07Z | |
| dc.date.available | 2009-7-7T07:39:07Z | |
| dc.date.issued | 2009 | |
| dc.identifier.uri | http://ir.lib.ncu.edu.tw:88/thesis/view_etd.asp?URN=965203030 | |
| dc.contributor.department | 通訊工程學系 | zh_TW |
| DC.description | 國立中央大學 | zh_TW |
| DC.description | National Central University | en_US |
| dc.description.abstract | 先前提出計算4×4零區塊個數作區塊模式決策之演算法效能已很好，然而其在高位元率下編碼效益並不顯著，所以在本論文中，我們提出參照8×8和4×4零區塊分佈之快速區塊模式演算法，藉此減少低量化參數、高位元率下的運算複雜度，加快編碼的時間，並且利用不同移動量向量位移取得更多8×8以及4×4零區塊個數，最後提出適應所有編碼情況的結合演算法，其擷取先前與我們所提出演算法之優點，盡可能地達到編碼加速，除此之外，我們針對畫面內區塊模式作簡化動作，減少其I4MB區塊模式決策數目，使畫面內預測複雜度降低。從實驗數據顯示，我們所提出的演算法最快可減少73％左右的編碼時間，同時維持畫面品質在一定可接受的失真範圍之內。
| zh_TW |
| dc.description.abstract | In the previous work we presented a zero-block mode decision algorithm. Although it reduces the computation time base upon the number of zero blocks, its performance on time saving is still limited for high bit-rate. We therefore propose some methods to reduce the computational complexity of inter/intra mode decision as possible. At first, we find the improvement by using different motion vectors to compute the number of zero-blocks (ZBs). Then, we utilize both 8×8 and 4×4 zero-blocks distribution as another zero-block mode decision algorithm. Finally, we integrate these ideals into a hybrid algorithm and SATD-based for I4MB intra mode prediction. According to the experimental results, our proposed algorithm can achieve 73% of time saving on average while maintaining coding performance.
| en_US |
| DC.subject | H.264 | zh_TW |
| DC.subject | 可變區塊大小模式 | zh_TW |
| DC.subject | 量化參數 | zh_TW |
| DC.subject | 畫面間/內模式決策 | zh_TW |
| DC.subject | 離散餘弦轉換 | zh_TW |
| DC.subject | 零區塊決策 | zh_TW |
| DC.subject | 提前零區塊偵測 | zh_TW |
| DC.subject | H.264 | en_US |
| DC.subject | Variable block-size mode | en_US |
| DC.subject | Quantization parameter | en_US |
| DC.subject | Early zero-block detection | en_US |
| DC.subject | Discrete cosine transform | en_US |
| DC.subject | Inter/Intra mode decision | en_US |
| DC.subject | Zero-block decision | en_US |
| DC.title | H.264進階零區塊模式決策之研究與探討 | zh_TW |
| dc.language.iso | zh-TW | zh-TW |
| DC.title | Advanced Zero-block Mode Decision Algorithm for H.264/AVC | en_US |
| DC.type | 博碩士論文 | zh_TW |
| DC.type | thesis | en_US |
| DC.publisher | National Central University | en_US |