KR100933254B1 - 최대 우도 검출기, 오류 정정 회로 및 매체 기억 장치 - Google Patents
최대 우도 검출기, 오류 정정 회로 및 매체 기억 장치 Download PDFInfo
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- KR100933254B1 KR100933254B1 KR1020070108764A KR20070108764A KR100933254B1 KR 100933254 B1 KR100933254 B1 KR 100933254B1 KR 1020070108764 A KR1020070108764 A KR 1020070108764A KR 20070108764 A KR20070108764 A KR 20070108764A KR 100933254 B1 KR100933254 B1 KR 100933254B1
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Abstract
Description
Claims (12)
- 삭제
- 삭제
- 삭제
- 삭제
- 삭제
- 입력 신호로부터 복호 대상 데이터열을 작성하고, 상기 복호 대상 데이터열의 각 비트의 우도를 검출하는 검출기와,상기 각 비트의 우도를 받고, 소정의 임계값 이하의 우도를 갖는 임의 개수의 비트 위치 정보를, 상기 우도순으로, 선택 에러 후보로서 저장하는 에러 후보 테이블을 작성하는 에러 후보 추출기와,상기 복호 대상 데이터열의 오류를 정정하여, 출력하는 정정 회로를 포함하고,상기 정정 회로는, 상기 정정에 실패하였다고 판정하였을 때에, 상기 에러 후보 테이블로부터 우도값이 낮은 에러 후보를 취출하고, 상기 복호열의 대응 위치의 비트를 플립하여, 새로운 상기 복호 대상 데이터열을 작성하며,상기 에러 후보 추출기는,상기 복호 대상 데이터열의 각 비트의 우도와 소정의 임계값을 비교하여, 소정의 임계값 이하의 우도의 비트 위치를 추출하는 임계값 판정부와,상기 추출된 비트 위치를, 상기 우도순으로, 상기 정정 회로의 선택 에러 후보를 저장하는 에러 후보 테이블을 작성하는 상위 후보 선택부를 포함하고,상기 상위 후보 선택부는, 상기 테이블에, 상기 우도의 절대값이 동일한 비트 위치를 하나의 선택 에러 후보로서, 상기 에러 후보 테이블에 저장하는 것을 특징으로 하는 오류 정정 회로.
- 제6항에 있어서, 상기 상위 후보 선택부는, 상기 우도 레벨마다의 스택 테이블을 참조하여, 상기 우도순으로, 상기 오류 정정 회로의 선택 에러 후보의 비트 위치를 저장하는 것을 특징으로 하는 오류 정정 회로.
- 제6항에 있어서, 상기 임계값 판정부는, 상기 추출한 소정의 임계값 이하의 우도의 비트 위치를, 복수의 우도 레벨에 따라서, 상기 우도와 상기 비트 위치를 스택 테이블에 저장하는 것을 특징으로 하는 오류 정정 회로.
- 삭제
- 제6항에 있어서, 상기 정정 회로는,상기 복호 대상 데이터열로부터 1조의 신드롬을 계산하는 신드롬 계산부와,상기 1조의 신드롬으로부터, 오류 위치 다항식의 계수를 계산하고, 또한 상기 오류 위치 다항식의 계수를 이용하여, 정정이 성공하는지의 여부를 판정하고, 정정 실패라고 판정하였을 때에, 상기 에러 후보 테이블에 상기 에러 후보를 요구 하는 오류 위치 다항식 계산부와,상기 오류 위치 다항식 계산부의 정정 성공의 판정에 따라서, 상기 신드롬과 상기 오류 위치 다항식의 계수를 이용하여, 상기 복호 대상 데이터열의 오류를 정정하는 정정 회로를 포함하는 것을 특징으로 하는 오류 정정 회로.
- 제6항에 있어서, 상기 에러 후보 추출기는, 상기 추출된 비트 위치를, 상기 에러 후보의 시작 위치와 에러 길이의 형식으로, 상기 테이블을 작성하는 것을 특징으로 하는 오류 정정 회로.
- 기억 매체로부터 신호를 판독하는 헤드와,상기 헤드의 판독 신호로부터 복호 대상 데이터열을 작성하고, 상기 복호 대상 데이터열의 각 비트의 우도를 검출하는 검출기와,상기 각 비트의 우도를 받고, 소정의 임계값 이하의 우도를 갖는 임의 개수의 비트 위치 정보를, 상기 우도순으로, 선택 에러 후보로서 저장하는 에러 후보 테이블을 작성하는 에러 후보 추출기와,상기 복호 대상 데이터열의 오류를 정정하여, 출력하는 정정 회로를 포함하고,상기 정정 회로는, 상기 정정에 실패하였다고 판정하였을 때에, 상기 에러 후보 테이블로부터 우도값이 낮은 에러 후보를 취출하고, 상기 복호열의 대응 위치의 비트를 플립하여, 새로운 상기 복호 대상 데이터열을 작성하며,상기 에러 후보 추출기는,상기 복호 대상 데이터열의 각 비트의 우도와 소정의 임계값을 비교하여, 소정의 임계값 이하의 우도의 비트 위치를 추출하는 임계값 판정부와,상기 추출된 비트 위치를, 상기 우도순으로, 상기 정정 회로의 선택 에러 후보를 저장하는 에러 후보 테이블을 작성하는 상위 후보 선택부를 포함하고,상기 상위 후보 선택부는, 상기 테이블에, 상기 우도의 절대값이 동일한 비트 위치를 하나의 선택 에러 후보로서, 상기 에러 후보 테이블에 저장하는 것을 특징으로 하는 매체 기억 장치.
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JP2007125221A JP5251000B2 (ja) | 2006-11-01 | 2007-05-10 | 誤り訂正回路及び媒体記憶装置 |
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CN102163463B (zh) * | 2011-04-26 | 2013-01-02 | 西安交通大学 | 一种降低bch解码延迟的双钱氏搜索方法 |
TWI487291B (zh) * | 2011-11-01 | 2015-06-01 | Univ Nat Chiao Tung | 循環碼解碼器及其方法 |
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KR101361238B1 (ko) * | 2012-06-05 | 2014-02-25 | 한국과학기술원 | 간섭 채널 환경에서의 오류 정정 방법 및 회로, 이를 이용한 플래시 메모리 장치 |
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US8230309B2 (en) | 2012-07-24 |
CN101174838A (zh) | 2008-05-07 |
CN101174838B (zh) | 2011-04-06 |
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