Abstract: A distributed conference system is presented herein for providing information to a conference presenter and a group of conference attendees. The distributed conference system includes a main console used by the conference presenter and one or more distributed consoles used by conference attendees. The main console provides a touch screen or other user interface and contains functions that the conference presenter can use to control each of the distributed consoles as well as providing standard room control functions. In addition, the distributed consoles may provide access to additional information for conference attendees and the conference presenter, such as television or other video feeds and a web browser through which they can access the Internet.

Abstract: A signal processing system includes a level dependent bass management system. The level dependent bass management system utilizes audio input signal level information to apply at least one of multiple, available bass management solutions to generate one or more output signals from the audio input signal. In at least one embodiment, initially the level dependent bass management system boosts components of the audio input signal in the low frequency range by an amount sufficient to at least partially compensate for low frequency attenuation of the first speaker without exceeding one or more acceptable limitations of the signal processing system. If boosting alone cannot completely compensate for low frequency attenuation of the first speaker without exceeding one or more acceptable limitations of the signal processing system, the level dependent bass management system processes the audio input signal using an alternate low frequency management solution.

Abstract: A distributed conference system is presented herein for providing information to a conference presenter and a group of conference attendees. The distributed conference system includes a main console used by the conference presenter and one or more distributed consoles used by conference attendees. The main console provides a touch screen or other user interface and contains functions that the conference presenter can use to control each of the distributed consoles as well as providing standard room control functions. In addition, the distributed consoles may provide access to additional information for conference attendees and the conference presenter, such as television or other video feeds and a web browser through which they can access the Internet.

Abstract: A downsampled adaptive filter is used to find the impulse response of a home theater system. Downsampling yields higher maximum measurable distance for given filter length. By using a Least-Mean-Square (LMS) adaptive filter, almost anything can be used as the source noise. While downsampling may decrease the resolution of the distance measurement, Adaptive Filtering allows a much broader range of test signals, as opposed to MLS (Maximum Length Sequence) in which the test signal defines the technique (a pseudo-random Maximum Length Sequence.

Abstract: Multiple passes are executed in the setup of an equalizer, and modification of the equalization is performed after each pass of an analysis phase. After an initial pass, the equalization is adjusted, based upon the location of peaks and valleys in the system response. This initial adjustment of equalization may tend to flatten most of the peaks and valleys to produce the desired uniform linear response. Inexact application of equalization corrections may introduce other artifacts into the system response and/or may not sufficiently normalize equalization. A second pass is then performed to measure the system response using the new equalization settings. The new peaks and valleys are measured, and the equalization adjusted to try to flatten response further. A proximity range may be applied to each pass, to reduce the likelihood that adjustment of one equalizer coefficient will create artifacts in the resulting system response.

Abstract: Individual speaker polarity is detected by band-limiting the processing to a range where the impulse response of most speakers are in-phase with their wiring. In the preferred embodiment, a second order 400 Hz Low Pass Filter (LPF) is used to band-limit the processing. Filtering can occur prior to processing as part of the noise generation, or completely as a post-processing operation on a full-bandwidth impulse response. Applying the low pass filter eliminates artifacts in the impulse response due to reverse-polarity wired drivers in a speaker system (e.g., tweeter). By analyzing only the lower frequencies, the initial peak of the impulse response will correlate to speaker polarity in the system.