Browse Prior Art Database

Audio/Video on a Non-programmable Terminal via Host Control

IP.com Disclosure Number: IPCOM000114030D
Original Publication Date: 1994-Oct-01
Included in the Prior Art Database: 2005-Mar-27
Document File: 4 page(s) / 144K

Publishing Venue

IBM

Related People

Aaker, KD: AUTHOR [+6]

Abstract

A method of presenting audio and video on a non-programmable terminal under host application control or user keyboard control is disclosed.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 40% of the total text.

Audio/Video on a Non-programmable Terminal via Host Control

      A method of presenting audio and video on a non-programmable
terminal under host application control or user keyboard control is
disclosed.

      Several products are available which enable audio and video
capability on a standard Personal Computer (PC).  Many of these
products are cards which are installed in the PC.  At least one is an
external unit, which attaches between the PC and PC monitor, and
between the PC and PC keyboard.  This disclosure describes how this
external box, referred to as a "PC Tuner" throughout this disclosure,
can enable audio and video capability on a Non-Programmable Terminal
(NPT).

      When attached to a standard PC, the PC Tuner can present video
over a rectangular area of the PC monitor.  The user can move the
video area, change the size of the video area (the PC Tuner scales
the video data), adjust volume, change the channel, etc. using the
keyboard.  The PC operating system may allow the user to move the
window, adjust volume, change the channel, etc. using the mouse.  The
PC operating system sends the "appropriate"  keyboard signals from
the PC to the PC Tuner, just as if the user performed the keyboard
sequences.

      Some NPTs are modular; that is, the NPT consists of a keyboard,
NPT logic unit, and separate PC monitor.  The NPT could have multiple
session capability; each display session looks like a separate NPT to
the attaching Work Station Controller (WSC) and host.  The NPT could
support the attachment of a mouse (or other pointing device).

The NPT could support the following functions:
 1.  The NPT provides a setup option, for the user to indicate if a
PC
     Tuner is attached.  The NPT forwards this information to the WSC
     at NPT power up.
 2.  The NPT receives various commands across the NPT communication
     cable, such as:
     o   Create a Video Region (includes parameters of row/column
         location on the display screen, rows/columns in the region,
         channel setting, etc.)
     o   Remove a Video Region
     o   Change Channel
     o   Adjust Volume
     o   Adjust Tint
     o   Adjust Color

          The NPT then sends the appropriate keyboard codes out the
    keyboard port where they are recognized and processed by the PC
    Tuner.
 3.  The NPT could support multiple display sessions; each display
     session could have a video region on the "display screen" for
     that session.  Any two of these sessions (display screens) could
     be displayed on the same physical screen, separated by a split
     line.  However, a PC Tuner only supports one video region.  In
     this case, the NPT could do the following:
     o   The NPT could keep track of the settings (channel, volume,
         etc.), location, and size of a video region for each of the
     ...