【摘要】：在高性能視頻壓縮標(biāo)準(zhǔn)中,由于熵編碼算法的高度復(fù)雜性和變換系數(shù)的龐大計算量,使得變換系數(shù)編碼成為影響視頻編碼效率的瓶頸之一。根據(jù)變換系數(shù)大都是零或一些絕對值較小的數(shù),以及兩類熵編碼方法各自的特點,提出一種針對變換系數(shù)熵編碼的優(yōu)化算法,通過減少上下文自適應(yīng)算術(shù)編碼字節(jié)的數(shù)量達(dá)到提高變換系數(shù)熵編碼效率的目的。實驗結(jié)果證明,與標(biāo)準(zhǔn)的HM 10.0算法相比,采用所提算法可以在QP為2,12和22時分別減少37.31%,26.34%和20.63%的編碼時間。
[Abstract]:In the high performance video compression standard, because of the high complexity of entropy coding algorithm and the huge computation of transform coefficient, transform coefficient coding becomes one of the bottlenecks that affect the efficiency of video coding. According to the fact that the transform coefficients are mostly zero or some numbers with small absolute values, and the characteristics of the two kinds of entropy coding methods, an optimization algorithm for entropy coding of transform coefficients is proposed. By reducing the number of context-adaptive arithmetic coding bytes, the entropy coding efficiency of transform coefficients is improved. The experimental results show that compared with the standard HM 10.0 algorithm, the proposed algorithm can reduce the coding time by 37.31% 26.34% and 20.63% at QP of 2n12 and 22:00, respectively.
【作者單位】： 西北工業(yè)大學(xué)電子信息學(xué)院;
【基金】：國家自然科學(xué)基金(60902101) 教育部新世紀(jì)優(yōu)秀人才計劃(NCET-11-0824) 中央高�；究蒲袠I(yè)務(wù)費專項資金(3102014JCQ01057)資助
【分類號】：TN919.81

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