Voice Quality For Broadband VoIP

HIGHLIGHTS

  • Reduce subscriber complaints by mitigating quality impairments in real time
  • Minimize the impact of transcoding on voice quality
  • Measure the end-to-end call experience

The strategy of using price to attract VoIP subscribers is losing ground now as the market matures and callers want to hear, and be heard, clearly.

Ditech Networks is the world's leader in working with VoIP communications providers to make this shift. Our customers effectively manage the many tradeoffs between voice quality and network capacity, while fully understanding and measuring the level of voice quality that is actually delivered to each subscriber.

IP networks introduce a new set of voice quality challenges, such as mismatched speech levels and longer transport delays, which cause a dramatic increase in the amount of echo that callers experience. For callers using low bitrate codecs, such as those at home on DSL or a cable modem, background noise has an additional detrimental effect on voice quality.

Moreover, as the call traverses multiple codecs and networks, voice impairments can build up to a point where the call becomes virtually unacceptable. For callers who are used to traditional PSTN service, and for carriers that want to extend their corporate brand to VoIP, voice quality is an imperative.

Ditech's solution delivers on this promise.

Voice Quality Assurance balances mismatched speech levels, removes or reduces background noise, and cancels hybrid and acoustic echoes. The solution also improves the fidelity of low bitrate VoIP calls through an Enhanced Voice Intelligibility feature that helps compensate for lost or attenuated speech formats. Voice Quality Assurance is deployed on our Packet Voice Processor platform to address additional voice issues specific to VoIP, such as packet loss, delay and jitter.

Equally important is the support of codec diversity in the access network. Codec Transcoding, when deployed at the network border, allows carriers to support multiple codec types without changing codecs elsewhere in the network, and without sacrificing call throughput and delay times. Deploy codec transcoding to maximize network flexibility and cost while minimizing the impact on voice quality.

As carriers migrate voice service to IP networks, we deliver the kind of consistent, reliable call experience that's now expected by VoIP subscribers.