4.1.6. SCR_PR_SIL (SCR Silence Probability Threshold)

Parameter Number: 0x418

Description: The SCR_PR_SIL parameter is used for Silence Compressed Recording and sets the threshold that the calculated probability of speech value is compared to in declaring silence. If the probability of speech is less than this parameter, silence is declared.

The SCR_PR_SIL parameter primarily affects the sensitivity of detecting silence at the trailing time of a speech period verses false silence detection.

SCR_PR_SIL is defined as:

• (Probability Value) * 2²³

Note: Multiplying by 2²³ converts the value into a linear 24-bit value that accommodates the 24-bit DSPs used on the DM3 boards.

For example, a silence probability threshold of 0.39, SCR_PR_SIL would have a value of:

• 0.39 * 2²³ = 3271557

Values: 0 to 4194304 (0.0 to 0.50 probability)

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