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    • 4. 发明申请
    • RLL ENCODING FOR LTO-5 TAPE
    • RLL编码LTO-5胶带
    • WO2009004084A1
    • 2009-01-08
    • PCT/EP2008/058699
    • 2008-07-04
    • INTERNATIONAL BUSINESS MACHINES CORPORATIONCIDECIYAN, Roy, DaronSEGER, PaulTANAKA, Keisuke
    • CIDECIYAN, Roy, DaronSEGER, PaulTANAKA, Keisuke
    • H03M5/14
    • H03M5/145G11B20/1426G11B2220/90
    • Method and apparatus are provided for encoding and decoding rate-( s ( K +1))/( s ( K +1)+1) TCMTR( j,k,t,a ) codes, where s is the ECC symbol size in bits and K is the number of unencoded symbols that are interleaved with an ( s +1)-bit encoded block at the output of a rate- s /( s +1) encoder that encodes the r-th 5-bit symbol. K=m/s -1 where m=s(K +1) is the total number of bits to be encoded. Error propagation is reduced, thus allowing the ECC code to correct errors efficiently. Header error-rate is also reduced by eliminating occurrence of likely error events at the detector output. Although initially an RLL code may be designed for an ECC symbol size of s bits, the RLL encoding of the present invention may be used in conjunction with ECC schemes that utilize symbol sizes other than s bits.
    • 提供了编码和解码速率(s(K + 1))/(s(K + 1)+1)TCMTR(j,k,t,a)码的方法和装置,其中s是ECC符号大小 位,K是在编码第r个5位符号的速率s /(s + 1)编码器的输出处与第(s + 1)位编码块交错的未编码符号的数量。 K = m / s-1其中m = s(K + 1)是要编码的总位数。 错误传播减少,从而允许ECC代码有效地纠正错误。 也可以通过消除检测器输出处可能发生的错误事件来减少报头错误率。 虽然最初可以设计用于s比特的ECC符号大小的RLL码,但是本发明的RLL编码可以与利用除了s比特之外的符号大小的ECC方案结合使用。