does obi200 or any obi device support adding your own codecs?
mweaser:
I want to get a obi device, preferably an obi200, does this or any other obi support other codecs? can i add a purchased codec to an obi? I want to be able to use other codecs on this than the ones provided.
SteveInWA:
Hunh? No. Why would you need to do that?
See these datasheets for supported CODECs:
OBi 200/202 ATAs: http://www.obihai.com/docs/OBi200DS.pdf
OBi IP Phones: http://www.obihai.com/docs/OBiPhoneDS.pdf
mweaser:
Quote from: SteveInWA on November 16, 2016, 07:42:18 pm
Hunh? No. Why would you need to do that?
See these datasheets for supported CODECs:
OBi 200/202 ATAs: http://www.obihai.com/docs/OBi200DS.pdf
OBi IP Phones: http://www.obihai.com/docs/OBiPhoneDS.pdf
Well apparently on some voip phones you can get commercial codecs, so you can buy codecs , apparently commercial codecs are better than the free ones , some of the codecs have better compression and don't effect the sound quality, which i know that compression codecs,the sound quality can be effected.
SteveInWA:
Um no, that's not accurate. It's not a question of "free" vs. "commercial". Some CODECs have patent licenses, and others are in the public domain. That difference is not related to the quality of the CODECs. The G.729 CODEC is an example of a licensed CODEC, and all OBi devices legally support that CODEC (Obihai has paid the license fee). It's not very useful anymore, as it was originally used in the days when internet bandwidth was expensive and constrained.
If you are calling regular telephone numbers, the international-standard and license-free G.711 CODECs provide the best call quality that the PSTN can handle.
At this time, there are several competing wideband audio codecs; some public-domain and some patented.
See this table for a comprehensive list (including many that are not used in telephony): https://en.wikipedia.org/wiki/Comparison_of_audio_coding_formats
There is no point to using a wideband audio CODEC with an OBi ATA over the PTSN, since the telephones you could plug into the OBi's RJ-11 jack don't support wideband audio (also known as HD Voice), and the PSTN has a limited audio range.
If you want to make pure SIP VoIP calls from one SIP phone to another, the OBi IP phones support the wideband opus CODEC, and they have built-in HD audio amplifiers and microphone/speaker components. Some Grandstream IP phones also support opus.
Opus is royalty-free and it is becoming the de-facto standard for wideband audio.
mweaser:
Quote from: SteveInWA on November 16, 2016, 08:07:36 pm
Um no, that's not accurate. It's not a question of "free" vs. "commercial". Some CODECs have patent licenses, and others are in the public domain. That difference is not related to the quality of the CODECs. The G.729 CODEC is an example of a licensed CODEC, and all OBi devices legally support that CODEC (Obihai has paid the license fee). It's not very useful anymore, as it was originally used in the days when internet bandwidth was expensive and constrained.
If you are calling regular telephone numbers, the international-standard and license-free G.711 CODECs provide the best call quality that the PSTN can handle.
At this time, there are several competing wideband audio codecs; some public-domain and some patented.
See this table for a comprehensive list (including many that are not used in telephony): https://en.wikipedia.org/wiki/Comparison_of_audio_coding_formats
There is no point to using a wideband audio CODEC with an OBi ATA over the PTSN, since the telephones you could plug into the OBi's RJ-11 jack don't support wideband audio (also known as HD Voice), and the PSTN has a limited audio range.
If you want to make pure SIP VoIP calls from one SIP phone to another, the OBi IP phones support the wideband opus CODEC, and they have built-in HD audio amplifiers and microphone/speaker components. Some Grandstream IP phones also support opus.
Opus is royalty-free and it is becoming the de-facto standard for wideband audio.
But aren't there a few commercial codecs out there that you have to purchase? and don't they have some voip phones that you can purchase codecs for?
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