Apparatus for audio signal processing
AssigneeNokia Corporation
InventorsErkki Juhani Paajanen, Riitta Elina Niemistö
Life of this patent
Estimating the term…
Abstract
A method for estimating background noise of an audio signal comprises detecting voice activity in one or more frames of the audio signal based on one or more first conditions. The method also comprises estimating a first background noise estimation if voice activity is not detected based on the one or more first conditions. Voice activity in the one or more frames of the audio signal based on one or more second conditions is detected. A second background noise estimation is estimated if voice activity is not detected based on the one or more second conditions. The voice activity is detected in the one or more frames less often based on the one or more first conditions than based on the one or more second conditions.
Claims21
1-61. (canceled)
An apparatus comprising:
- a first voice activity detection module configured to detect a first voice activity in one or more frames of an audio signal;
- a first background noise estimation module configured to estimate a first background noise estimation if the first voice activity is not detected;
- a second voice activity detection module configured to detect a second voice activity in the one or more frames of the audio signal;
- a second background noise estimation module configured to estimate a second background noise estimation if the second voice activity is not detected;
- and
- wherein the first voice activity is detected in the one or more frames less often-than the second voice activity.
A method for estimating background noise of an audio signal comprising:
- detecting a first voice activity in one or more frames of the audio signal;
- estimating a first background noise estimation if the first voice activity is not detected;
- detecting a second voice activity in the one or more frames of the audio signal;
- and
- estimating a second background noise estimation if the second voice activity is not detected;
- wherein the first voice activity is detected in the one or more frames less often-first than the second voice activity.
Dependencies are inferred from the claim text.