1. L

    OP25 Vocoder difference

    I have been running the two different OP25 Phase 1 vocoders side by side and I am noticing some differences between the two. Pavel's fixed point vocoder sounds bit more natural to me and less robotic. Tones also sound nice and smooth. When I look the the waveforms in Audacity, the fixed point...
  2. D

    Motorola DTR Vocoder

    Does anybody know what is the vocoder used in Motorola DTR radios?
  3. H

    Digital interoperability: Vocoders, Standards, Oh My!

    I have been trying to figure out which digital radios can communicate with each other using digital voice. I have come across a lot of terms and acronyms and I am trying to sort out which is a standard and which is a vocoder. My goal is to try and put together a list of digital radios that can...
  4. F

    Consider a Vocoder Beyond AMBE+2

    It seems Digital Voice Systems has a lock on the preferred vocoder for use in LMR equipment. DVS got IMBE into P25 years ago, and it is now won acceptance of the newer AMBE+2 vocoder. The excellent voice quality of the AMBE+2 has also captured the favored position in almost every standard...
  5. C

    Fire Dept Tests P25 Radios

    Prior to January 1, 2013, emergency service departments nationwide will need to comply with the new FCC narrowband guidelines. On February 24, 2010 the Maple Bluff Fire Department (MBFD) in Dane County WI performed an unbiased and impartial radio test. They compared the sound quality of the...
  6. C

    EF Johnson Technologies, Inc. To Showcase New AMBE+2 1.6 Vocoder at IWCE

    Irving, TX – March 8, 2010 – EF Johnson Technologies, Inc. (NASDAQ: EFJI) announced today that it will showcase the new AMBE+2 1.6 vocoder at the International Wireless Communications Expo (IWCE) March 10 – 12 at the Las Vegas Convention Center. The AMBE+2 1.6 vocoder was adopted by the Project...
  7. P

    Relationship between Vocoder and Speech frames.

    Hi Please can you tell me the relation ship between the vocoder we use in Mobile/Portables to the max speech which can be compressed in the time slot( i mean a a given frame of the protocol). Any links, tutorials, or references are welcome. Regards PC