Title: Inversion cascade coding/decoding method
Application Number: 200610124660 Application Date: 2006.09.30
Publication Number: 1933004 Publication Date: 2007.03.21
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: G11B20/14;H03M7/46
Applicant(s) Name: Huazhong Science Address:
Inventor(s) Name:
Attorney & Agent: caobao jing
Abstract:
    This is a reversal cascaded encoding/decode method. An encoding method is that. Carry HRRLL encoding to user data and get first limited serial, open up to midst serial, and RS correcting code produces checkout data by midst serial and carry LRRLL encoding to checkout data and get second limited serial, then unite the second and first limited serial codes as record serial. A decode method is that. Decode record serial into second and first limited serial codes and carry LRRLL decode for second limited serial to get checkout data. Open up the first limited serial into midst serial, and unite midst serial with checkout data to carry RS decode and get adjusted midst serial, then carry condensation and HRRLL decode to get user data. It restrains error spread by exchanging order of RS correcting code and RLL to reduce error code ratio. Meanwhile, carry open-up to reduce length of limited serial and gusty error after RLL decode.
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