server.mrcp2.rsspeechsynth.rtpLowerBoundarySamples

Adjusts the RTP sending speed by setting the minimum number of samples that can be sent ahead.

Value

Integer: 0–rtpUpperBoundarySamples samples.

DEFAULT: 300

How to set

If using the Management Station, set on the Speech Server service. If not using Management Station, set in an NSS configuration file (user-NSSxx.txt).

Usage

Rarely used.

Several TTS parameters affect the RTP sending speed of audio samples from Speech Server to the telephony interface. When the speed is too slow, accelerates audio delivery for a period of time and then resumes normal speeds (as determined by the sampling rate).

Speech Server detects delays by comparing the number of “sent ahead” samples to the value of rtpLowerBoundarySamples. If the number of samples is less than the value of the parameter, Speech Server accelerates the delivery speed.

Supported for MRCPv2 browsers. (Ignored for MRCPv1 browsers.)

Related parameters