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Hi I found one of the RTP packet has this text "linear predictive encoding from xeroc park". I am trying to find which encoder might have been used during this communication. Can you please suggest me if it refers to the encoder and if there is any decoder to decode it . Any suggestion appreciated.

asked 11 May '15, 00:36

Shas's gravatar image

accept rate: 0%

To quote RFC 1890, "RTP Profile for Audio and Video Conferences with Minimal Control":

4.4.9 LPC

  LPC designates an experimental linear predictive encoding contributed
  by Ron Frederick, Xerox PARC, which is based on an implementation
  written by Ron Zuckerman, Motorola, posted to the Usenet group
  comp.dsp on June 26, 1992.



   An implementation is available at


although that FTP server doesn't seem to be working.

permanent link

answered 11 May '15, 02:08

Guy%20Harris's gravatar image

Guy Harris ♦♦
accept rate: 19%

@Guy Harris, Thanks. This session was captured during voip communication by a reputed app. I am surprised, some apps still using it. Isnt it too old to use ?

(11 May '15, 02:24) Shas
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question asked: 11 May '15, 00:36

question was seen: 1,123 times

last updated: 11 May '15, 02:24

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