block encoder 中文意思是什麼
block encoder
解釋
塊編碼器-
In the encoder, if the incoming block is intercoded, no dct coefficients are computed after the eob of the incoming blocks is performing a dct
在該編碼器部分，假如輸入區塊是交互編碼模式，則僅需對輸入離散餘弦轉換區塊進行解量化及再量化之程序，無需其它任何離散餘弦轉換及反向離散餘弦轉換之運算。 -
Further, in the encoder when the incoming block is intercoded, an algorithm is applied to predict which dct coefficients may become zero after a subsequent quantization operation, and only dct coefficients that may not become zero are computed in performing the dct
再者，在該編碼器中，當輸入區塊是交互編碼模式，則應用一種計算方法來預測經由后續的量化運算后那一些離散餘弦轉換系數可能變為零，而只有那些可能不會變為零的離散餘弦轉換系數會用在執行離散餘弦轉換的計算中。 -
As a straightforward method, the full search algorithm ( fs ) is widely used because of its high performance. usually, fs is computationally expensive in a video encoder. as a result, in order to reduce the heavy computational load of fs, active research has focused on fast bmas for a long time and several sub - optimal search algorithms for block - based motion estimation have been developed. these include : three step search ( tss ), four step search ( fss ), two - d logarithmic search, orthogonal search, cross search, etc
目前塊匹配運動估計演算法有很多，如全搜索法、三步法、共軛方向搜索法、二維對數搜索法、交叉搜索法、鉆石搜索法以及四步搜索法等，它們各有優缺點，全搜索法精度高，但計算量大，三步搜索法和交叉搜索法搜索速度較快，但搜索誤差較大，容易陷入局部最小值。 -
On designing of the encoder, by using the decoding for video chip saa7113 made in philips, analog video signal inputted realizes a / d conversion in analog / power block
編碼器的設計中，模擬/電源塊主要實現的功能是對輸入的模擬視頻信號進行a / d轉換，解碼晶元採用philips公司saa7113 。 -
With a view to dct that costs the longer computing time, fast dct is proposed, and the method of prejudgment of an macro - block of all zero coefficient of dct is adopted in this paper, which makes about 40 percent dct computation reduced, consequently, the encoding speed of h. 263 encoder can be further increased
263編碼器的編碼速率；對運算量較大的dct給出了快速演算法，並對全零dct系數塊採用提前判斷的方法，從而省去了約40的dct運算，進一步提高了h 263編碼器的編碼速率。 -
This thesis gives an overview of entropy coding in jpeg 2000, especially the code - block based coding and context based adaptive arithmetic coding. to optimize the implementation of mq encoder, several methods are adopted to optimize the algorithm which is emulated in matlab
因此本文對jpeg2000標準中位平面編碼和基於上下文的自適應二進制算術編碼技術作了詳細的分析和研究之後，對自適應算術編碼演算法優化使其更適合於硬體實現。 -
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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