Surfin’: Developing New Digital Voice Software, Continued
By Stan Horzepa, WA1LOU
This week, we check back in and discover VK5DGR’s amazing progress in the digital voice software field.
Fifteen months later, David has announced: “I'm in the process of releasing a 1400 bit/s version of Codec 2. Through efficient quantization of the Line Spectrum Pairs (LSPs), I have reduced the bit rate from 2500 to 1400 bit/s with only a small change in quality. This bit rate makes the codec very useful for digital voice over HF radio channels.”
David adds that building a 1400 bit/s communications quality speech codec is a highlight of his career. That is saying a lot considering VK5DGR's amazing ride thus far.
Thank you Anthony Cutler, KE7HQY, for the heads-up concerning VK5DGR’s achievement.
Until next time, keep on surfin’!