🚀 go-pugleaf

In article <39484@ucbvax.BERKELEY.EDU> jbuck@galileo.berkeley.edu (Joe Buck) writes:

>   Correct except that your rates are off by a factor of two.  The LPC10-E
>   algorithm is 2400 bps; the federal standard CELP algorithm is 4800bps.
>
>   --
>   Joe Buck
>   jbuck@galileo.berkeley.edu {uunet,ucbvax}!galileo.berkeley.edu!jbuck

You are, of course, correct on the vocoder bps rates.  We recently
completed the implementation of a 4800 bps Multi-Band Excitation (MBE)
vocoder here so I should have caught that error.

For anyone who's interested I've listed a few references for vocoders.
It's not meant to represent anything but some papers I had in a
vocoder folder sitting on my desk.

------------------------------
Linear Predictive Coding (LPC)
------------------------------
Thomas E. Tremain, "The Government Standard Linear Predictive Coding
Algorithm: LPC-10", Speech Technology, April 1982, pp. 40-49.

"Telecommunications: Analog to Digital Conversion of Voice by 2,400
Bit/Second Linear Predictive Coding",  FED-STD-1015 November 28, 1984

George S. Kang and Stephanie S. Everett, "Improvement of the
Excitation Source in the Narrow-Band Linear Prediction Vocoder", IEEE
Trans on ASSP, Vol. ASSP-33, No. 2, April 1985, pp. 377-386.

J.R. Blakley, et. al., "An Efficient Implementation of the LPC-10e
Speech Coding Algorithm", MILCOM-87, pp. 24.6.1-24.6.5

John C. Nagengast, "The STU-III, Narrowband Speech Comes of Age",
Military Speech Tech-87, pp. 44-47.

---------------------------
Multi-Band Excitation (MBE)
---------------------------

Daniel W. Griffin, "Multi-Band Excitation Vocoder," PhD Thesis, EECS
Department, MIT, 1987.

John C. Hardwick and Jae S. Lim, "A 4.8 kps Multi-Band Excitation
Speech Coder", ICASSP-88 (??), pp. 374-377.

-------------------------------------
Code Excited Linear Prediction (CELP)
-------------------------------------

David P. Kemp, "Department of Defense Requirements for a 4800 bps
Voice Coder", Military Speech Tech-87, pp. 48-50.

Daniel Lin, "High-Quality 4800 bps Speech Coding for Real-Time
Applications", Military Speech Tech-87, pp. 51-53.

--
Michael Pitaro
pitaro@rocket.sanders.com