問(wèn)答題

某離散無(wú)記憶信源符號(hào)集為,所對(duì)應(yīng)的概率分別為:0.4,0.2,0.1,0.1,0.07,0.05,0.05,0.02,0.01,碼符號(hào)集為{0,1,2,3}.
1)求信源的熵H(X)及信源剩余度γ;
2)對(duì)其進(jìn)行四元Huffman編碼;
3)求平均碼長(zhǎng),編碼效率η及編碼器輸出的信息傳輸率(碼率)R.


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