Invention Grant
US07904793B2 Method for decoding data in non-volatile storage using reliability metrics based on multiple reads
有权
使用基于多个读取的可靠性度量来解码非易失性存储器中的数据的方法
- Patent Title: Method for decoding data in non-volatile storage using reliability metrics based on multiple reads
- Patent Title (中): 使用基于多个读取的可靠性度量来解码非易失性存储器中的数据的方法
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Application No.: US11693649Application Date: 2007-03-29
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Publication No.: US07904793B2Publication Date: 2011-03-08
- Inventor: Nima Mokhlesi , Henry Chin , Dengtao Zhao
- Applicant: Nima Mokhlesi , Henry Chin , Dengtao Zhao
- Applicant Address: US CA Milpitas
- Assignee: SanDisk Corporation
- Current Assignee: SanDisk Corporation
- Current Assignee Address: US CA Milpitas
- Agency: Vierra Magen Marcus & DeNiro LLP
- Main IPC: H03M13/00
- IPC: H03M13/00 ; H03M13/03

Abstract:
Data stored in non-volatile storage is decoded using iterative probabilistic decoding and multiple read operations to achieve greater reliability. An error correcting code such as a low density parity check code may be used. In one approach, initial reliability metrics, such as logarithmic likelihood ratios, are used in decoding read data of a set of non-volatile storage element. The decoding attempts to converge by adjusting the reliability metrics for bits in code words which represent the sensed state. If convergence does not occur, e.g., within a set time period, the state of the non-volatile storage element is sensed again, current values of the reliability metrics in the decoder are adjusted, and the decoding again attempts to converge. In another approach, the initial reliability metrics are based on multiple reads. Tables which store the reliability metrics and adjustments based on the sensed states can be prepared before decoding occurs.
Public/Granted literature
- US20080250300A1 METHOD FOR DECODING DATA IN NON-VOLATILE STORAGE USING RELIABILITY METRICS BASED ON MULTIPLE READS Public/Granted day:2008-10-09
Information query
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