NXDN Silence Frame

[Red_Ice]

Hello friends, I have a question, I imagine the answer is affirmative, do you know if the NXDN system has a silence frame similar to that of the DMR system? And if so, does anyone know him?

 

[Red_Ice]

Interesting theme

 

[SantiagoRC]

Good morning,

it's my first time posting in this forum, and I'm new to these topics. I'm interested in knowing if there is, or if it's necessary, a have a silence frame in NXDN."

"I've searched through several samples I have available and haven't been able to find the sound frame mentioned in the manual, nor any other repeated frame that I could consider as a sound frame."

"I've looked into the mbelib code and I've found that within this code, a silence frame, an erasure frame, and a tone frame are defined as well."

If what I believe to deduce is correct, the vocoder would interpret a frame as silence, just by looking at certain bits, and if I am correct, any value of the sound frame, by setting the appropriate bits to 1, the vocoder would interpret it as silence. Am I correct or very wrong?"

If I am correct, searching for a supposed sound frame with a specific format would be a dead end.

I have tried to find information about the AMBE vocoder and I have not succeeded. Could someone indicate where to download it or send it? Also, information about the AMBE vocoder and the mbelib library."

I hope I have explained myself correctly and that the translator does its job well. My English is very bad, and I have turned to ChatGPT.

Thank you very much.

 

[slicerwizard]

Hello friends, I have a question, I imagine the answer is affirmative, do you know if the NXDN system has a silence frame similar to that of the DMR system? And if so, does anyone know him?

When I looked at clear and scrambled NXDN voice, I believe that clear voice did use AMBE silence frames; scrambled definitely did not. I assume that was a weak attempt at making 15 bit scrambling slightly less of a hot mess.

I remember noting that scrambling didn't use silence frames. I doubt it would've been interesting/memorable if clear also didn't use silence frames, so I'm sticking with clear:yes, scramble:no.