entropy encoding 中文意思是什麼
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The experimental results show that the compressed average bit is 8. 3674, 1. 2442 bits less than the original entropy, and the efficiency of rice coding achieves 98. 81 %. and the algorithm also has the advantage of real - time encoding in the system
經過無損壓縮演算法處理，管道泄漏信號壓縮后的平均位數達到8 . 3674bits ，比原始信息熵降低了1 . 2442bits ; rice編碼的編碼效率達到了98 . 81 % 。 -
Secondly, on the basis of understanding the theory of the core compression arithmetic in jpeg2000, we deal with some image by the second wavelet transform and entropy arithmetic encoding used in jpeg2000
為此，我們在充分了解jpeg2000標準的壓縮、解壓縮原理的基礎上，採用jpeg2000標準的核心壓縮演算法，即第二代小波快速演算法以及算術編碼過程，對一些圖像進行了處理。 -
Context based adaptive arithmetic coding is used in the last part of the encoding process as the entropy coding. the mq coder is adopted in jpeg2000
與其它的熵編碼方法相比，算術編碼能夠取得更好的壓縮效果，但它演算法復雜，運算量相對增加。 -
This paper first research on main technologies used by avs standard, which include prediction, transform, quantization, in - loop filter, and entropy encoding, and then focus on the 2d - vlc entropy coder of avs, which is context - based adaptive coder. this encoder operates on run - level pair, and it uses the type of current block and value of current coefficients to switch vlc code - table. these tables are designed according to the distribution of transformed coefficients, and this way is much better than using only one table to code all residual coefficients in one 8x8 block
本文首先詳細研究了avs標準的核心技術，包括預測編碼、變換量化、環路濾波器以及掃描和熵編碼等，之後重點研究了avs標準中使用的基於上下文的2d - vlc變長編碼方法，這種方法編碼的是（ run ， level ）數對，同時根據當前編碼塊的類型和殘差系數這兩種上下文信息來切換碼表，這些碼表是預先根據變換系數在不同位置的分佈信息設計好的，這樣要比只使用一個變長碼表來編碼塊內所有位置上的殘差系數的壓縮效果要好得多。
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