This version (18 May 2021 08:41) was approved by John Joseph.The Previously approved version (18 Mar 2021 02:22) is available.
Table of Contents
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Voice Activity Detector Flag
Description
VAD Flag takes the Modulation Index and compares it to a threshold value. If the threshold value is met for the designated amount of time, the output flag is set high, otherwise it is low.
Targets Supported
| Name | ADSP-214xx | ADSP-215xx/SC5xx | ADAU145x/146x |
|---|---|---|---|
| ————————————-- | ——————-- | ——————————-- | —————————- |
| VAD Flag | NA | NA | S |
Pins
Input
| Name | Type | Description |
|---|---|---|
| ———————- | ————-- | ———————- |
| ModulationIndex | Control | Modulation Index |
Output
| Name | Type | Description |
|---|---|---|
| —————————- | ————-- | ———————- |
| ConditionFlag | Control | 0 or 1 output determining if speech is present or not |
Configurable Parameters
| GUI Parameter | Default Value | Range | Function Description |
|---|---|---|---|
| —————————————- | ———————- | —————— | —————————————- |
| Threshold | -30 | -96 - 24 | dB value for comparison with Modulation Index |
| Count | 250 | 1 - 10000 | Time value in (ms) for condition to be met before setting flag high |
DSP Parameters
| Parameter Name | Description | ADSP-214xx/SC5xx/215xx | ADAU145x/146x |
|---|---|---|---|
| —————————————- | —————————————————————- | —————————————- | —————————- |
| thresh | Threshold value | NA | 8.24 Format |
| count | time before setting the flag high | NA | Integer |
resources/tools-software/sigmastudiov2/modules/adialgorithms/vadflag.txt · Last modified: 11 May 2021 15:28 by John Joseph