??logb??FY(y)?b32ba933loga3e bit/symbolba33(y?A),FY(a?A)?23?loga3?1
?Hc(Y)??logb?e bit/symbol3)
?0?x?a?0??0?y?2aFY(y)?P(Y?y)?P(2X?y)?P(X?yy2?ay2) ??20bxdx?b82b24y2y3f(y)?F?(y)?Hc(Y)???f(y)logf(y)dy???f(y)logRRb8ydy2 ??log ??log ??logb8b8b8??f(y)dy?R?Rf(y)logydy2??b4?Rylogydy322ba92ba9log38aea33 ??logb??FY(y)?b243logeba3a3?39?2ba33
?1y,FY(2a)?23?log?Hc(Y)??logb?e?1 bit/symbol· 16 ·
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