- 作者: 謝朝和;呂伯強;劉文光
- 作者服務機構: 中正理工學院電機系
- 中文摘要: 本文推導出用於影像之二維遞迴格狀濾波器之數學模式。此一模式具有二維時間更新及級數更新之遞迴特牲。利用此 一濾波器,本文設計出一混合式適應性影像預估編碼系統。模擬結果顯示,與傳統的區塊適應性預估編碼系統比較,此一新系統可以減少26%的位元率及32%的計算時間;此外重建畫面的視覺品質亦較佳。
- 英文摘要: A two-dimensional (2-d) recursive lattice filter modeling of images is developed. The lattice fiter has time updates and order updates in two dimensions. Using the lattice filter, a hybrid adaptive predictive coding system is also developed for image compression. Compared with the conventional block adaptive predictive coding scheme, the new coding approach results in about 26% bit-rate reduction and 32% computation saving and better visual quality is obtained.
- 中文關鍵字: lattice filter; image compression; predictive coding; bit rate
- 英文關鍵字: --