問(wèn)答題設(shè)一個(gè)信源中包含8個(gè)消息符號(hào),它們的出現(xiàn)概率分別為0.1,0.18,0.4,0.05,0.06,0.1,0.07,0.04。試對(duì)其進(jìn)行霍夫曼編碼,并求出編碼的平均長(zhǎng)度L和效率。

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