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Data with multiple sets of error correction codes

A technology of error correction code and original data, applied in the field of error detection and error correction

Inactive Publication Date: 2005-02-16
HEWLETT PACKARD DEV CO LP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The probability that errors can remain undetected and uncorrected within an error-correcting code block is acceptably low for most applications

Method used

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  • Data with multiple sets of error correction codes
  • Data with multiple sets of error correction codes
  • Data with multiple sets of error correction codes

Examples

Experimental program
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Embodiment Construction

[0010] figure 1 An exemplary error correction code block 100 prior to encoding is illustrated. exist figure 1 In the example, sector (102) contains 2,048 bytes of raw data. In some existing optical disc standards, an error correction code block contains 16 sectors of raw data, such as figure 1 shown. In some recommended standards, an error correction code block contains 32 sectors of raw data. exist figure 1 In the example, each sector (plus 16 bytes of identification and other overhead data) is logically formatted as 12 rows of 172 bytes each. For an error-correcting code block comprising 16 sectors of original data, calculate 16-byte column error-correcting code data 106 for each column in the above-mentioned 172 columns (one byte per column) original data, and the resulting 16-row The column error correction code data and the row original data are interleaved with each other. 10 bytes of row error correction code data (104) are added to each row of 172 bytes of origi...

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Abstract

Data is formatted into logical ECC blocks for communication or recording. For primary data (400) in a first block, there is ECC data in the first block and additional ECC data in a second block (402). When the ECC data in the first and second blocks are independent, then compatible devices can use the ECC data from either block, and other devices can use the ECC data from just the first block.

Description

technical field [0001] The present invention relates generally to data storage, and more particularly to error detection and correction. Background technique [0002] Computer data storage systems and data storage systems often include provisions for detecting and correcting errors. Usually the smallest addressable unit of data is called a sector, and usually multiple sectors are further logically grouped into blocks, where each block contains error correction for that block. These logical blocks are called Error Correcting Code (ECC) blocks. For most applications, the probability that errors can remain undetected and uncorrected within an error correcting code block is acceptably low. However, sometimes there is a need for much higher guarantees of data integrity. Optional additional error detection and correction is required to be compatible with existing standard formats. Contents of the invention [0003] For at least one error-correcting code block, the data area ...

Claims

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Application Information

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IPC IPC(8): G06F12/16G06F3/06G06F11/08G11B20/12G11B20/18G11C29/00H02H3/05H03K19/003H03M13/00H03M13/03H03M13/29H04B1/74H04L1/22H05K10/00
CPCH03M13/2909H03M13/29G11B20/1813
Inventor C·R·魏劳赫
Owner HEWLETT PACKARD DEV CO LP
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