Browse Prior Art Database

Magnetic Tape Transcriber

IP.com Disclosure Number: IPCOM000094720D
Original Publication Date: 1965-May-01
Included in the Prior Art Database: 2005-Mar-06
Document File: 2 page(s) / 58K

Publishing Venue

IBM

Related People

Laurer, GJ: AUTHOR [+2]

Abstract

It is sometimes required to change the character format on a reel of tape to a new character format. In particular, many coded formats can represent information characters, e.g., four of eight, three of seven or straight binary code. In each format, the same character is represented by a different combination of binary signals.

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 64% of the total text.

Page 1 of 2

Magnetic Tape Transcriber

It is sometimes required to change the character format on a reel of tape to a new character format. In particular, many coded formats can represent information characters, e.g., four of eight, three of seven or straight binary code. In each format, the same character is represented by a different combination of binary signals.

The format in A comprises data channels 8, 4, 2, and 1 and control channels m and n. Channel m contains a start of record bit and channel n contains a parity bit. Signals, disposed in a row perpendicular to tape 20 as it moves in the direction represented by arrow 22 comprise a single character position. Succeeding rows represent the remaining data characters on tape 20 and the remaining control characters employed to direct the handling of complete records on the tape.

The transitional format in B comprises a plurality of data channels 8, 4, 2 and 1 and control channels c, a and b. The number of channels in the transitional tape is greater than the number of channels in the first tape. However, due to control requirements, a direct substitution between related channels cannot be performed. A plurality of rows, in B a pair of rows, is used to store the signals contained in a single row in A. Channels 1, 2, 4, 8 and b in B store the signals on channels 1, 2, 4, 8 and n in A, respectively.

The second row in B stores any remaining signals. For example, the signal in channel m in A is stored in channel b of the second...