STEP Labs, Inc. Patent applications |
Patent application number | Title | Published |
20100278353 | System and Method For Intelligibility Enhancement of Audio Information - A method for processing an input signal to create an enhanced output signal includes obtaining an envelope of the input signal, determining a logarithm signal of the envelope, determining a rate of change of the logarithm signal to obtain a slope value, and applying a value derived from the slope value to the input signal to thereby generate an enhanced output signal. | 11-04-2010 |
20090274310 | System and method for dynamic sound delivery - A dynamic range manipulation system, for use for example in an audio playback system such as a two-way communication system, mobile telephone, MP3 player, and the like, obtains a measure of ambient noise at the playback location and adjusts the gain of the drive signal provided to the loudspeaker based on this measure and based on the audio signal to be played back. | 11-05-2009 |
20090154726 | System and Method for Noise Activity Detection - A noise activity detector includes a circuit for calculating average energy in a critical bandwidth, a circuit for determining a threshold function, a circuit for generating a dynamic modification of the threshold function, a circuit for identifying frequency components of the signal having energy that is above threshold values determined by the threshold function, and to determine a first average energy value representing an average energy of the identified frequency components with energy above the threshold, a circuit for identifying frequency components of the signal having energy that is below threshold values determined by the threshold function, and to determine a second average energy value representing an average energy of the identified frequency components with energy below the threshold, a circuit for offsetting at least one of the first and second average energy values, a circuit for comparing the resultant average energy values with one another, and a circuit for indicating the presence of noise activity if the first average energy value is below the second average energy value. | 06-18-2009 |
20090136057 | Automated Sensor Signal Matching - In one embodiment, a method for matching first and second signals includes transforming, over a selected frequency band, the first and second signals into the frequency domain such that frequency components of the first and second signals are assigned to associated frequency bins, generating a scaling ratio associated with each frequency bin, and for at least one of the two signals, or at least a third signal derived from one of the two signals, scaling frequency components associated with each frequency bin by the scaling ratio associated with that frequency bin. The generating comprises determining, during a non-startup period, a signal ratio of the first and second signals for each frequency bin, determining the usability of each signal ratio, and designating a signal ratio as a scaling ratio if it is determined to be usable. | 05-28-2009 |