| Summary: | ASTERISK-22178: Enquiry about channel bandpass filter (narrowband and wideband) in codecs implementations G.711 and G.722 | ||
| Reporter: | Laura Fernandez Gallardo (laufergall) | Labels: | |
| Date Opened: | 2013-07-22 04:13:41 | Date Closed: | 2013-07-26 09:34:25 |
| Priority: | Major | Regression? | |
| Status: | Closed/Complete | Components: | |
| Versions: | Frequency of Occurrence | ||
| Related Issues: | |||
| Environment: | Attachments: | ||
| Description: | Dear Asterisk developers,
I am conducting research on the quality of speech signals in telephony, focusing on the differences between narrowband and wideband. I have set up a connection between a Polycom phone and a SNOM phone employing Asterisk and everything went fine. I would need to know now how the codecs G.711 alaw and G.722 (both 64 kbps) are implemented in Asterisk. I assume they follow the ITU standards, but my question is: is there a channel bandpass filter applied along with the coding-decoding processes? i.e. ITU rec. G.712 for narrowband and ITU P.341 for wideband, or similar. I have not found information about this on any website or on Asterisk forums. Thank you very much in advance, any help on this matter will be appreciated. Laura | ||
| Comments: | By: Rusty Newton (rnewton) 2013-07-26 09:34:25.305-0500 Closing as Not a Bug. We don't handle information requests on here: https://wiki.asterisk.org/wiki/display/AST/Asterisk+Issue+Guidelines Please post your question on the #asterisk-dev irc.freenode.net room or else the asterisk-dev mailing list. See http://www.asterisk.org/community/discuss for info on those resources. | ||