The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 24, 2001
Filed:
Jan. 27, 1999
Toru Michigami, Fujisawa, JP;
Keisuke Tanaka, Kawasaki, JP;
International Business Machines Corporation, Armonk, NY (US);
Abstract
A method and apparatus for high-speed memory management of ECC product-coded data arrays read back from DVD storage subsystems in which rows of length Y≦2,×(2m+1) of the array are read from disk and written in alternate blocks of 2,bytes per block and (2m+1) blocks per row into successive addresses of a synchronous dynamic random access memory (SDRAM) operable both as a buffer and an interleaved pair of memories. Array data is subjected to detection and correction of error and/or erasure by ECC processing of data extracted from and rewritten into the SDRAM, the array being extracted, ECC processed, and rewritten to and from the SDRAM in block interleave column major order and then in block interleave row major order.