Patent ID: 6771721
Filing Date: 2004-08-03
Classification: H03D,H04B,H04L

Abstract:
An apparatus for reducing audio clicks under fading conditions, comprising:means for receiving a faded signal; means for determining phase variations of the faded signal using the phase differences between each two consecutive samples wherein the means for determining the phase variations include: means for processing the faded signal to provide a complex baseband signal that includes inphase (I) and quadrature (Q) components, and means for determining the phase variations of the faded signal based on the I and Q components of the complex baseband signal; means for reducing the phase variations below a predefined level, if the phase variations exceed a phase variation threshold, wherein the phase variation threshold is greater than 2&pgr; radian; and means for determining the strength of the faded signal, if the phase variations of the faded signal exceed the phase variation threshold, wherein the phase variations of the faded signal are reduced below the predefined level, only if the strength of the faded signal is below a signal strength threshold, wherein the means for processing the faded signal include: means for sampling the complex baseband signal at a predefined sampling rate; means for determining the phase associated with each sample based on the sample's corresponding I and Q components; means for determining the phase differences between each two consecutive samples; and means for summing the phase differences of a predefined number of consecutive samples to provide a phase variation associated with a baseband vector.