Algorithm and Chip Design of Adaptive Coding Control for Video Compression System

[[abstract]]在論文中，我們針對視訊壓縮系統，提出一個編碼控制的方法。根據視訊資料的時間相關性，修改GOP的架構，增加編碼的效能。修改GOP架構的方式為，一段視訊編碼資料中，包含一個基本型GOP和若干個進階型GOP，以此，在一個GOP的週期內，平衡實際編碼的位元數目，與傳輸儲存的位元數目。GOP架構的修改，不但能夠增加編碼的效能，同時可以解決視訊資料畫面轉換的情形。再者，論文中提出的編碼控制演算法，編碼時不需要重新編碼，對於即時視訊壓縮編碼的應用相當適合。除了編碼控制演算法的發展，論文中也提出，演算法設計成晶片的硬體架構，以及即時晶片設計之實現。[[abstract]]In this thesis, we propose an efficient coding control strategy for video compression system. To achieve better coding performance, GOP (group of picture) structure is adaptively modified according to the temporal correlation. The adaptive GOP approach involves a basic GOP and many advanced GOPs in one video sequence, in which the coding rate and target rate can be kept balance during a GOP coding period. Based on the adaptive GOP, not only the coding efficiency can be promoted, but also can solve scene change problem. Most importantly, the proposed algorithm do not require re-encoding procedure, it is suitable for real-time coding system. The architecture of the proposed algorithm and chip design has been presented in this thesis