Dismiss
InnovationQ will be updated on Sunday, Oct. 22, from 10am ET - noon. You may experience brief service interruptions during that time.
Browse Prior Art Database

Two Dimensional Interleaving ECC for Mixed Error Modes

IP.com Disclosure Number: IPCOM000084883D
Original Publication Date: 1976-Jan-01
Included in the Prior Art Database: 2005-Mar-02
Document File: 2 page(s) / 58K

Publishing Venue

IBM

Related People

Patel, AM: AUTHOR [+2]

Abstract

Whereas other arrangements of this method require large frame size and, thus, expensive buffer, this method presents various two-dimensional interleaving arrangements which provide smaller frame size and, thus, smaller, less expensive buffer.

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 55% of the total text.

Page 1 of 2

Two Dimensional Interleaving ECC for Mixed Error Modes

Whereas other arrangements of this method require large frame size and, thus, expensive buffer, this method presents various two-dimensional interleaving arrangements which provide smaller frame size and, thus, smaller, less expensive buffer.

Two-dimensional interleaving of the error correction code (ECC) provides correction capability and requires buffering quantities which lie between the conventional 6250 bpi ECC implementation and the twining method described by A.M. Patel, "Twined Interleaving of Data on a Multi-Track Storage Medium", IBM Technical Disclosure Bulletin, Vol. 18, No. 8, January 1976, pages 2628 to 2630. The same segment

(Image Omitted)

as that described in twining, is spread first vertically downward by section and then horizontally among the 36 tracks. The number of distinct segments per frame determines the number of section-columns along the tape across which each segment is spread.

The first section of the first segment begins on track 1, the first section of the second segment is placed in parallel on track 2, etc., for all segments. The 2nd section of each segment is placed in a similar manner. The jth section of segment i is thus placed on the [i + (j - 1)Q]th track in a successive order of increasing i and then j in a modulo 36 track count. The parameter Q is the number of segments in a frame. A frame is a group of bytes including check bytes which must be completely received befor...