Cd-Rom Image Retrieval System

Abstract

An image retrieval system has been developed using CD -ROM ( Compact Disc -Read Only Memory ). The images such as documents, drawings, etc., are distributed in the CD -ROM disk and user can retrieve, see on CRT, and make hardcopies of them.The main features of the system are 4s follows: 1) A high data reliability which guarantee an error rate of less than 10 -IL is achieved with newly developed ECC LSI for CIRC and decoding software for Layered ECC adopted in the CD -ROM data format. 2) Using an image compression technique based on the G4 facsimile format, more than 5000 letter sized documents can be stored in a disk. 3) The system can display images on a high resolutional (200 TPI) CRT and print hardcopy by a 400 TPI laser beam printer. 4) The system can be operated by common 16 bit personal computers.The several applications of this system are also discussed.

The CD-ROM Drive

“…A common terminology used to characterize a CIRC decoder is (t = 2, e = 4) which designates .at most two symbols corrected at the Cl level and at most four symbols corrected (by means of the erasure-position method) at the C2 level, respectively. Ultimately, the success of the correction is also dependent on the implemented decoding algorithm [2,3,77,110].…”

“…Because the original audio standard does not fulfill the reliability level [110] required by the computing industry (Le., a bit error rate of at most 10-12 ), the CD-ROM standard provides additional correction capabilities, usually referred to as third-layer error correction.…”