藉由封閉式解的位元率-誤差最佳化轉換及量化方法METHOD FOR RATE-DISTORTION OPTIMIZED TRANSFORM AND QUANTIZATION THROUGH A CLOSED-FORM OPERATION

專利類型

發明

專利國別 (專利申請國家)

美國

專利申請案號

13/413,598

專利證號

US 9,118,918 B2

專利獲證名稱

藉由封閉式解的位元率-誤差最佳化轉換及量化方法METHOD FOR RATE-DISTORTION OPTIMIZED TRANSFORM AND QUANTIZATION THROUGH A CLOSED-FORM OPERATION

專利所屬機關 (申請機關)

國立臺灣大學

獲證日期

2015/08/25

技術說明

一種位元率-誤差最佳化（RDO）轉換及量化系統。圖框(FRAME)分類單元將一輸入圖框分類為關鍵圖框(KEYFRAME)或非關鍵圖框(NON KEYFRAME)。位元率模型更新單元根據編碼關鍵圖框的轉換係數及位元率，以產生位元率模型的至少一模型參數。RDO（位元率-誤差最佳化）轉換及量化單元處理輸入圖框，並根據模型參數以產生量化轉換係數(QUANTIZED TRANSFORM RESIDUE)。圖框緩衝器儲存一先前圖框，據以估測位元率。 The present invention is directed to a rate-distortion optimized (RDO) transform and quantization system. A frame classification unit classifies an input frame as either a key frame or a non-key frame. A rate model update unit generates at least one model parameter of a rate model according to a transform coefficient and a bitrate resulted from an encoded key frame. An RDO transform and quantization unit processes the input frame, thereby generating a quantized transform coefficient according to the model parameter. A frame buffer is used to store a previous frame, according to which the bitrate is estimated.

備註

本部(第1080018808號)同意該校108年03月20日校研發字第1080019626號函申請終止維護案。

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