Browse Prior Art Database

Audio and Video Recording System

IP.com Disclosure Number: IPCOM000116299D
Original Publication Date: 1995-Aug-01
Included in the Prior Art Database: 2005-Mar-30
Document File: 2 page(s) / 48K

Publishing Venue

IBM

Related People

Nakamura, T: AUTHOR

Abstract

Disclosed is a recording system for continuous digital data including audio and video data. This system utilizes the Hard Disk Drives (HDD) to store data. By replacing the individual HDD without interrupting the data stream, virtual infinite recording time is realized. Multiple HDDs or data buffer memory is used to avoid the interruption to the data stream.

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Audio and Video Recording System

      Disclosed is a recording system for continuous digital data
including audio and video data.  This system utilizes the Hard Disk
Drives (HDD) to store data.  By replacing the individual HDD without
interrupting the data stream, virtual infinite recording time is
realized.  Multiple HDDs or data buffer memory is used to avoid the
interruption to the data stream.

      Fig. 1 shows the first implementation.  Two HDDs (1)(2) are
connected to the control device (4).  At first, the data is recorded
to the HDD (1).  When HDD (1) reaches to its capacity, the control
device (4) automatically switch the recording destination from HDD
(1) to HDD (3) then notify an operator that HDD (1) become full and
need to be replaced.  The operator replaces the HDD (1) by HDD (3)
before HDD (2) become full.  When HDD (2) reaches to the capacity,
the control device switch the recording destination again from HDD
(2) to HDD (3) and request for replacement.  By repeating this
process, the recording of data is continued without interruption.

      Fig. 2 shows the second implementation.  The control device(5)
is equipped with some amount of buffer memory those are large enough
to buffer the data during the replacement of HDD.  The recording is
performed through buffer memory (6) to HDD (7).  Buffer memory (6) is
capable of concurrent data transfer.  In other words, buffer memory
(6) can send the data to HDD (7) during receiving data. ...