Telephony in Wideband Fidelity
Berlin/Hanover (ots)
AVM at Cebit 2006 AVM Presents VoIP and Broadband Technology Highlights- Telephony in Wideband Fidelity-DVB Standard for ADSL Television
- New: Internet telephony in wideband voice fidelity - New: VoIP connections with dual-mode cellphones - New: TV over ADSL with the DVB-IPI standard - AVM advocates new wideband VoIP codecs
At Cebit 2006, the Berlin communications specialist AVM presents new capabilities in Internet telephony. Now that the convenience features familiar to ISDN users have been available in VoIP for some time, AVM pioneers the next steps in VoIP innovation. For example, AVM demonstrates the first cordless telephone that makes VoIP phone calls in wideband fidelity. To offer this noticeable added value to as many users as possible, AVM advocates the widespread adoption of this communication technique. Another AVM innovation integrates GSM/WLAN cellphones in ADSL communication. Furthermore, the AVM exhibit also presents DVB-IPI, the standardized Internet-based variant of the open, established TV transmission technique DVB.
VoIP Technology Highlight: "Wideband-Fidelity Phone Calls"
At stand C48 in Hall 13, AVM demonstrates the first phone calls in fascinating new wideband fidelity. The technique uses 16-kHz wideband voice codecs, which sample the voice input 16,000 times per second. In this way the quality of voice telephone calls approaches high fidelity. The entire acoustic spectrum of a speaking voice, ranging from 20 Hz to about 8,000 Hz, can be completely reproduced over a telephone connection. Up to now, fixed-line phone connections have transported frequencies between 300 and 3,400 Hz-less than half of the audible spectrum. In particular, the highest and lowest tones have not been transmitted in existing phone communications. At the AVM stand, visitors can see and hear the new acoustic quality in a phone booth featuring wideband voice fidelity.
AVM Advocates VoIP in Wideband Quality and Presents First Products
To realize phone calls in wideband fidelity, AVM uses not a proprietary technology, but rather the wideband voice codecs Linear PCM 16 (L16) and PCMA-16. Both these codecs offer a sampling rate of 16,000 samples per second. L16 encodes the resulting voice data with a resolution of 16 bits per sample. The signal is transmitted with no compression or conversion, so that no latency is involved. In this way Linear PCM 16 guarantees the best possible connection quality. The TIA (Telecommunications Industry Association) has adopted L16 as mandatory for wideband communication in its TIA 920 specification. The PCMA-16 codec on the other hand compands the voice signal using the A-law algorithm in 8-bit resolution. PCMA-16 is a 16 kHz variant of the standard VoIP codec G.711. Both the codecs used are specified for Voice over IP in RFC 3551. Both codecs are license-free and open to all vendors. In consultation with other manufacturers and VoIP providers, AVM advocates wider implementation of these codecs in extending VoIP networks towards crystal-clear voice fidelity. At CeBIT AVM presents the new WLAN telephone and music portable FRITZ!Mini, the first terminal equipment for wideband voice fidelity.
VoIP Technology Highlight: "VoIP Calls From a Cellphone"
Another technology highlight in the AVM presentation integrates mobile phones in the FRITZ!Box environment. Dual-mode mobile phones-that is, GSM cellphones with integrated WLAN and SIP-can connect to FRITZ!Box over a wireless link. The WLAN cellphone then works with FRITZ!Box the same way as a cordless extension phone. To integrate cellphones smoothly in home Internet telephony, FRITZ!Box functions as a SIP proxy. The cellphone can use the accustomed FRITZ!Box features such as internal calls, call routing rules, and call forwarding. Multiple cellphones can connect to FRITZ!Box over WLAN links, and all wireless communication is encrypted.
DVB-IPI: Open Platform for TV Transmission
AVM implements TV communication over ADSL using the new DVB-IPI standard (Digital Video Broadcasting-Internet Protocol Infrastructure). DVB is supported worldwide on various media, including satellite (DVB-S), cable TV networks (DVB-C), terrestrial broadcasting (DVB-T), and asynchronous terrestrial transmission to mobile receivers (DVB-H). DVB-IPI now uses the Internet as a new, back-channel capable communication medium. Like the DVB framework, DVB-IPI is an open, manufacturer-independent standard adopted by ETSI, the European Telecommunications Standards Institute, and is perfectly integrated in the existing architectures of broadcasters and the Internet. DVB compresses digital image data using the MPEG2 and MPEG4 AVC codecs. In the IPI variant, the image data is then transmitted over the Internet in IP frames. In addition to transmitting "Free TV," the DVB-IPI framework also provides "containers" with DRM techniques to deliver pay-TV and video-on-demand.
Contact:
Urban Bastert
Public Relations Office
AVM GmbH
Alt-Moabit 95, 10559 Berlin
http://www.avm.de
Fon +49 (0) 30 / 3 99 76 -214
Fax +49 (0) 30 / 3 99 76 -640
Mail u.bastert@avm.de
Original-Content von: AVM GmbH, übermittelt durch news aktuell