Browse Prior Art Database

Spacial Sound Manipulator

IP.com Disclosure Number: IPCOM000111073D
Original Publication Date: 1994-Feb-01
Included in the Prior Art Database: 2005-Mar-26
Document File: 2 page(s) / 37K

Publishing Venue

IBM

Related People

Farrett, PW: AUTHOR [+2]

Abstract

Disclosed is a spatial manipulator for recalculating parameters in a two-channel audio system, based upon coordinates specified by the user through a Graphical User Interface (GUI) concept.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 99% of the total text.

Spacial Sound Manipulator

      Disclosed is a spatial manipulator for recalculating parameters
in a two-channel audio system, based upon coordinates specified by
the user through a Graphical User Interface (GUI) concept.

      The graphical user interface of a computer system provides a
display screen as shown in the Figure, including pull down captions
2, icons 4, and a space 6, in which the user describes the
architectural environment and furniture by drawing and by dragging
icons.  An infrared pointing mouse can be u sed to provide inputs to
the system.  When the user indicates satisfaction with the new
configuration, for example by pointing to the "file" caption 8, an
algorithm recalculates audio parameters by comparing the new
configuration with default values of previous historical values
stored on disk.

      The algorithm first gets virtual sound space parameters from
the new configuration, and calculates a new location for the "sweet
spot," at the full effect of the two-channel audio system will be
produced.  The algorithm next calculates the angles between this
location and each speaker.  The algorithm computes various audio
parameters, considering phantom sound sources caused by reflections
off walls, sound absorption, and frequency and phase shifting for a
virtual sound space.

      Finally, the new audio parameters are recorded in the
historical repository, such as a personal computer disk, and are
transmitted through an audio port of th...