Base management systems

• US 20040125967A1
• Filed: 06/25/2003
• Published: 07/01/2004
• Est. Priority Date: 05/03/2002
• Status: Active Grant

• Current Assignee: Harman Becker Automotive Systems GmbH (Samsung Electronics Co. Ltd.)
• Original Assignee: Harman Becker Automotive Systems GmbH (Samsung Electronics Co. Ltd.)
• Inventors: Nitzpon, Hans-Juergen, Eid, Bradley F.
• Granted Patent: US 7,391,869 B2
• Time in Patent Office: Days
• US Class Current: 381/99
• CPC Class Codes: H04R 2499/13 Acoustic transducers and sound field adaptation in vehicles
• CPC Class Codes: H04S 3/002 Non-adaptive circuits, e.g. manually adjustable or static, for enhancing the sound image or the spatial distribution control circuits for electronic adaptation of the sound field H04S7/30
• CPC Class Codes: H04S 3/008 in which the audio signals are in digital form, i.e. employing more than two discrete digital channels data reduction aspects thereof based on psychoacoustics G10L19/02
• CPC Class Codes: H04S 3/02 of the matrix type, i.e. in which input signals are combined algebraically, e.g. after having been phase shifted with respect to each other
• CPC Class Codes: H04S 7/302 Electronic adaptation of stereophonic sound system to listener position or orientation H04S7/301 takes precedence
• CPC Class Codes: H04S 7/307 Frequency adjustment, e.g. tone control H04S7/301 takes precedence

Abstract

Sound processing systems have been developed that create a surround effect without quality degradation experienced by known sound processing systems in non-optimum listening environments. The sound processing systems may include matrix decoding systems that manipulate input signals prior to converting them into a number of output signals so that the output signals are a function of a greater number of input signals. These sound processing systems may also or alternately include a base management system that from the input signals preserves the low frequency components of the input signals in separate channels. Both the matrix decoding systems and base management systems may also produce additional signals. Further, the matrix decoding and base management systems may be implemented separately or jointly in vehicular sound systems.

Claims

1. A base management method, comprising:

creating a plurality of high frequency signals for decoding by a matrix decoder;

creating and maintaining a plurality of low frequency signals; and

creating a SUB signal.

2. A surround processing system, comprising:

a base management module that that creates a plurality of high frequency signals and creates and maintains a plurality of low frequency signals; and

a matrix decoder module that processes the plurality of high frequency signals.

3. A vehicular sound processing system, comprising:

a base management module that that creates a plurality of high frequency signals and creates and maintains a plurality of low frequency signals;

a matrix decoder module that processes the plurality of high frequency signals; and

a plurality of speakers that receive the plurality of low frequency signals and the plurality of high frequency signals.