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Browse Prior Art Database

Maximum Entity Transfer to Isochronous Data Transfer Interval Capacities

IP.com Disclosure Number: IPCOM000111635D
Original Publication Date: 1994-Mar-01
Included in the Prior Art Database: 2005-Mar-26
Document File: 2 page(s) / 54K

Publishing Venue

IBM

Related People

Williams, ML: AUTHOR

Abstract

With the advent of multimedia compound documents, users typically receive isochronous data objects which they desire to transfer to differing media. These differing media always contain a finite capacity; more specifically, the capacity is typically defined in segments. For example, a user may receive a Multiple Document Interface (MDI) object that he or she desires to transfer to a 60-minute audio cassette tape. (Note that the cassette tape is defined in 30-minute increments for the storage capacity.) Typically, users desire the transfer of isochronous objects in congruent and non-interrupted data segments. Consider this example further where the MDI object contains 4 imbedded audio references -- 10 minutes, 10 minutes, 15 minutes and 5 minutes, consecutively.

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Maximum Entity Transfer to Isochronous Data Transfer Interval Capacities

      With the advent of multimedia compound documents, users
typically receive isochronous data objects which they desire to
transfer to differing media.  These differing media always contain a
finite capacity; more specifically, the capacity is typically defined
in segments.  For example, a user may receive a Multiple Document
Interface (MDI) object that he or she desires to transfer to a
60-minute audio cassette tape.  (Note that the cassette tape is
defined in 30-minute increments for the storage capacity.)
Typically, users desire the transfer of isochronous objects in
congruent and non-interrupted data segments.  Consider this example
further where the MDI object contains 4 imbedded audio references --
10 minutes, 10 minutes, 15 minutes and 5 minutes, consecutively.  A
user transferring these isochronous objects consecutively would
create an interrupt in the 15-minute object, due to the 30 minute
maximum on each side of a 60 minute tape (10+10+15 >  30).  This user
desires for a transfer sequence of 10+15+5 on one side of the
cassette with 10 on the other side of the cassette.  (Note that there
is no interrupt in any of the isochronous data objects.)  More
specially, users desire mechanisms whereby the original order can be
maintained during the transfer process.

      Provided is a mechanism by which isochronous data objects can
be transferred with minimum interrupts in the data...