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Coding algorithms

HD Voice

About HD Voice

HD Voice delivers higher quality voice transmissions by extending the frequency of range of traditional or narrowband voice calls (300 Hz to 3400 Hz) out to wideband audio ranges (50 Hz to 7000 Hz). The 7 kHz wideband sound quality allows the full signature character of the reporter’s voice to be heard, leading to greater audience involvement and loyalty.

Look for more about HD Voice in our FAQ page.

SIP : Session Initiation Protocol

Why did AETA AUDIO SYSTEMS and the main codec manufacturers choose this protocol for transmission over IP?

The SIP protocol is a standard developed for Voice over IP applications. It is supported by telecom operators and many organisations such as the EBU. Many products designed for media transmission over IP operate with this standard.

This is due to its capabitlity to solve most compatibility and interoperation issues met on such applications, including the traversal of firewalls and NAT routers. Choosing SIP compliant codecs from AETA AUDIO SYSTEMS or a member of the “Audio-via-IP Experts Group” avoids getting “locked” to a single brand and a proprietary system. You thus keep free and open for the future evolution.

STUN : Simple Traversal of UDP through NAT routers

Using a STUN server is one method to transmit an audio stream through a NAT router. AETA AUDIO Systems codecs are capable to make use of such servers, by configuring the public address of a STUN server.

You can use for instance the following servers:

stun.aeta-audio.com

85.214.119.212

stun.aeta.com

85.214.119.212

stun.sipgate.net

217.10.68.152

stun.counterpath.net

216.93.246.18

Be aware that these services may be interrupted or modified; for long term use, check the validity of the server that is used.