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The Utah VHF Society - Observations about the codec used ...
http://utahvhfs.org/dstar_codec_behavior.html
The codec used in D-Star is, by design a lossycodec: That is, data reduction is accomplished by preserving only those fundamental characteristics of the human voice that are required to adequately reproduce it. As one might expect, with lower bit …
Independent Radio Club D-STAR CODEC Page
https://ladstar.org/codec.htm
Some codecs are designed to compress data as much as possible to save bandwidth and transmission time. Others emphasise audio quality and fidelity, which is what you would want in a good sound system. For example, the codec we use for D-STAR is different from the audio codec used by your cell phone.
WB8NUT - D-Star Information Page
D-Star refers to voice communication as "DV Mode" for Digital Voice Mode. Voice is converted to a digital format using a bit of computer code referred to as a CODEC. The CODEC code is embedded on a microchip which encodes and decodes the audio signals into and out of the AMBE (Advanced Multi-Band Excitation format).
What is D-STAR? an Introduction - Wireless Society of ...
http://www.ws1sm.com/D-STAR.html
The D-STAR Protocol Within the D-STAR Digital Voice protocol standards (DV), voice audio is encoded as a 3600 bit/s data stream using proprietary AMBE encoding, with 1200 bit/s FEC, leaving 1200 bit/s for an additional data "path" between radios utilizing DV mode. On air bit rates for DV mode are 4800 bit/s over the 2 m, 70 cm and 23 cm bands.
What is D-STAR: ham radio digital voice - Electronics Notes
https://www.electronics-notes.com/articles/ham_radio/voice-modes/what-is-d-star-digital-voice.php
Ham radio voice modes Amplitude modulation Frequency modulation Single sideband Digital voice summary D-STAR. D-STAR is a form of digital communications used for amateur radio. D-STAR stands for Digital Smart Technology for Amateur Radio and it is an open Amateur Radio standard for digital communications. Although D-STAR is able to provide both data and voice …
Improving Open-AMBE for D-Star - QSL.net
https://www.qsl.net/kb9mwr/projects/dv/codec/ambe.html
Overview: The AMBE vocoder (speech coder) problem started when D-Star was developed and introduced to ham radio in the late 90's early 2000's. It's since been compounded by DMR, Yaesu Fusion, and other digital radios. The proposed solution has been to …
D-STAR Quick-Start Guide - Rob Locher
http://www.roblocher.com/whitepapers/dstar.html
D-STAR is elitist. It's true that D-STAR radios are much more expensive than otherwise-similar radios that only have FM. Most D-STAR radios use a hardware codec chip that is said to cost about $20 or less. Therefore about $20 or so of the extra price of a D-STAR radio over an FM radio can be explained by hardware.
PC Audio Codecs > High Definition Audio Codecs …
https://www.realtek.com/en/component/zoo/category/pc-audio-codecs-high-definition-audio-codecs-software
2014/05/14. 30 MB. ATI HDMI Audio Device. R2.70. 2012/06/22. 22 MB. 3D SoundBack Beta 0.1 (Realtek 3D SoundBack restores audio effects, including surround sound, reverberation, and spatial effects, for legacy game titles when running on Windows Vista.) Beta 0.1. 2008/07/15.
D-STAR Decoder Software - D-STAR Info
http://www.dstarinfo.com/d-star-decoder-software.aspx
D-STAR Decoder Software. Just uploaded new version of D-Star decoder to files section. - Added various output modules (dongle,dvtool,UDP,files,logging) that can be combined, so you can listen to calls and stream it over internet and log it to disk. - Added differential demodulator that can decode output even from badly filtered receivers.
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