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:
Mar. 21, 2000
Filed:
Sep. 24, 1997
Jeffrey Mark Claar, Aliso Viejo, CA (US);
Roger Mather Duvall, Garden Grove, CA (US);
Richard Joseph Oliver, Laguna Beach, CA (US);
Sony Corporation, Tokyo, JP;
Sony Pictures Entertainment, Inc., Culver City, CA (US);
Abstract
A system for sub-allocating space within a logical block in a disk-based file system is described. Each disk block is subdivided into an integer number of smaller sub-blocks. One or more of the sub-blocks may contain data samples. Associated with each block is a variable which indicates which sub-block within the block contains data which have been read from disk to memory. When an application performs a read operation, the variable is first checked to determine whether the data sample to be read is already in memory. If the data sample is in memory, no disk read operation for that data is required.