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Rate-distortion optimized transform and quantization
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刊登日期:2014/05/21 |
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‧ 專利名稱 |
位元率-誤差最佳化轉換及量化系統 |
‧ 專利證書號 |
9118918
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‧ 專利權人 |
國立臺灣大學 |
‧ 專利國家
(申請日) |
美國 (2012/03/06) 中華民國 (2012/04/12)
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‧ 發明人/PI |
黃崇堯 ,陳宏銘 ,蘇柏諺,高偈愷,歐道聖,
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‧ 單位 |
電信工程學研究所
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‧ 簡歷/Experience |
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技術摘要 / Our Technology: |
一種位元率-誤差最佳化(RDO)轉換及量化系統。圖框分類單元將一輸入圖框分類為關鍵圖框或非關鍵圖框。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。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.
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專利簡述 / Intellectual Properties: |
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聯繫方式 / Contact: |
臺大產學合作總中心 / Center of Industry-Academia Collaboration, NTU |
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Email:ordiac@ntu.edu.tw |
電話/Tel:02-3366-9945 |
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