With the launch of Skype for Windows 4.0, Skype delivered its first client incorporating Skype’s new superwideband SILK codec providing a new user experience in voice calling. For example, Alec Saunders in “Skype 4.0 audio: smooth as SILK”:

Perhaps the biggest improvement, though, is audio quality.  We all thought that Skype audio was great, right?  Skype’s internally developed SILK codec slipped into the final release, despite not having been in prior betas. A wideband codec that delivers the goods at half the bitrate of prior codecs, SILK makes talking on Skype a pure pleasure.

The SILK codec will be rolled out with the final release of Skype for Mac 2.8 (currently in beta but without the SILK codec) in April and in the next Linux release (no date given). The coding was designed to allow easy embedding into hardware devices, such as sound cards, headphones and Skype phones. But this still limits the SILK experience to Skype-to-Skype calls. So they looked at the question of how can Skype most readily advance the deployment of this high quality codec  and the resulting user experience at billions of additional voice conversation end points?

At eComm 2009 this afternoon Skype announced, during Jonathan Christensen’s keynote presentation, that the SILK codec will be licensable, royalty-free, to device manufacturers and others; it has been designed independent from Skype signaling protocols such that it can be used in voice streams incorporating the SIP protocol. Jonathan mentioned that there is no requirement to use the SILK codec in conjunction with a Skype implementation.

From an interview with Jonathan Christensen, Skype’s GM for Audio and Video, with Alec Saunders in Skype’s SILKen bear hug: “Further, SILK media streams pass unchanged across Skype’s own media gateways, meaning that SIP endpoints have suddenly become much more compelling in the Skype world”.  Alec goes on to discuss two reasons for Skype’s strategy: (i) to spread superwideband audio everywhere and (ii) to give existing carriers a bear hug. Read the post for details.

In his post on this announcement, Jonathan pointed out what the three year Skype SILK development process focused on:

• • improving audio bandwidth going from 8 kHz to 12 kHz, meaning that a SILK conversation sounds like you are in the same room as the person you are speaking with
  • providing real-time bandwidth scalability to deal with degraded network conditions
  • balancing codec optimization between voice, music and background noise, each of which can have an impact on the overall user experience
  • delivering a robust solution that delivers a more consistent audio experience, regardless of network conditions and an individual user’s voice signature

I have watched as a wireless carrier attempts at new video calling services are introduced and subsequently fail due to a lack of adoption – the primary reason being there are too few devices out there supporting video calling and thus, there’s nobody to whom one can make a wireless video call. Skype’s announcement today overcomes a major barrier to allowing a much broader user base to take advantage of superwideband audio. It’s a first, but key, step towards a broader goal than “Skype Everywhere”, namely, superwideband audio on all voice calling.

Finally, this afternoon I had a chance to meet many members of the SILK development team who attended Jonathan’s presentation. They deserve kudos and congratulations for all their ground breaking efforts and success in setting new standards in voice call quality.

Developers can find more information at Skype’s SILK website.

Phil Wolff, Skype Journal comments on the SILK performance slides shown at the presentation: SILK performs better

Update: The transcript of Jonathan Christensen’s Codec Evolution and Industry Proposal presentation.

The U.S. cell phone industry is asking its customers to only text during the inauguration ceremonies tomorrow. From the New York Times:

The largest cellphone carriers, fearful that a communicative citizenry will overwhelm their networks, have taken the unusual step of asking people to limit their phone calls and to delay sending photos. The carriers are also spending millions of dollars to temporarily and substantially upgrade their networks in Washington.

And the article goes on to request that customers delay sending photographs; they warn of delayed text messages and difficulty getting onto the (mobile) Internet.

But then all weekend I have heard CNN wanting to try out some “new technology” asking that as many of their “viewers” as possible send in photographs of “The Moment”. so that they can do a mass (Microsoft) Photosynth montage. Is this a recipe for Atlantic seaboard wireless network meltdown at noon Tuesday (EST or GMT-5)?

James Kendrick talks about his problems in San Francisco with AT&T; I experienced similar problems roaming on AT&T in Las Vegas at CES 2009 and in California back in September. At CES this was resolved only by setting my BlackBerry Bold to use just the “2G” network on the advice of an employee of a company who really would know; that tip resulted in a more stable and reliable operation. For those U.S. friends who want to experience a robust, reliable 3G GSM/HSDPA network, I invite you to move to Canada to be on Rogers. Rates may be a bit higher, but it’s always there, robust and reliable, in the advertised regions. Best proof: handling SlingPlayer for BlackBerry when driving along the 401 freeway at 100 km/hour.

Finally, first test of Barack Obama’s ability to change the U.S. government bureaucracy? His ability (and his resolve) to keep at least one of his two BlackBerries. And to save embarrassment when he next drops his BlackBerry, I would have to recommend an Otterbox Defender case.

Yesterday I wrote a post for GigaOm, Skype: Coming to a Cell Phone Near You, discussing how the announcement of two new beta versions of Skype on mobile devices gave a hint of Skype’s future mobile strategy.

At the same time Truphone announced a new version of their iPhone application. Whereas the version released at the time of the Apple App Store launch back in July only supported outbound calling over WiFi access points, the new release not only supports inbound calling to your iPhone number but also makes outbound calls via the 3G carrier networks that offer the iPhone.

Innovation driven competition in delivering low cost international calling services appears to be heating up during these challenging economic times – at least for calls originating in your “home” calling country or area code(s). Here’s a brief summary of what is evolving:

We’ve seen the evolution of two architectures for making VoIP-enabled calling from mobile devices; it’s all a matter of where the calling party’s Skype (or VoIP client) session is opened up – directly on the device or on a dedicated hosted server. This leads to two other considerations:

• Carrying the voice portion of the call from the mobile device into the network cloud: either via the carrier’s robust and proven (GSM) voice channel or over via a WiFi access point
• The need to support Skype’s instant messaging (chat and presence); this always occurs as a data activity

VoIP Client on the Mobile Device; VoIP over WiFi

Skype for Windows Mobile places the VoIP client directly onto the device. As a result the device must handle the “VoIP processing” to generate the packets that are transmitted over the supporting data network (either a carrier’s 3G network or via a WiFi access point.) As mentioned previously, it places heavy demands on the device’s resources, especially the processor (running at much lower speeds than on a PC) and the battery.

Truphone’s original voice offering also runs on the device (usually a Nokia Smartphone). While both Skype for Windows Mobile and Truphone can run over either WiFi access points or a 3G network, it is strongly advised to use these only over WiFi access points to have a reliable, robust, high quality voice service. For instance, the Skype for Windows Mobile download page says:

• Log into Skype from any WiFi zone to make free calls and send instant messages to anyone else on Skype, anywhere in the world, any day of the week.
• WiFi connection or 3G/2G data connection (we cannot guarantee voice quality over 3G/2G. You may also be liable to additional data charges so please check with your operator before using)

Truphone’s original iPhone outbound calling offering was also only available using the iPhone’s WiFi capability; however, details of their architecture were never revealed.

Accessing VoIP via a Wireless Carrier

Over the past year we have seen the rise of several services that use the alternate architecture where a call is placed via a local access point to a hosted server that then opens up a Skype client. The server-based Skype client then completes the call as a Skype-to-Skype call.

While originally pioneered by iSkoot, a service using this architecture, such as Skype Lite beta, makes a call to a SIP Gateway server via a local point of presence while data about the call is concurrently sent via the underlying data network to a hosted Mobile Gateway. This dedicated gateway then sets up a Skype-to-Skype call between the SIP Gateway — now connected to your cell phone — and the destination Skype contact. Skype chat messages can also be exchanged concurrently over the data network. We are now seeing various offerings using this architecture:

• The highly successful Skypephone offered by 3 in nine countries.
• iSkoot providing service for a wide range of phones including BlackBerry, Nokia and T-Mobile’s G-1.
• Truphone Anywhere: when Truphone found they could not offer a highly reliable service over 3G networks (largely due to device resource considerations), they launched Truphone Anywhere that allows Truphone calls to be made over a 2G (GSM/EDGE) or 3G (UMTS/HSPA) voice/data network as well as over WiFi access points.
• Skype for Mobile beta – Skype’s first attempt to go beyond Skype for Windows Mobile onto other platforms such as Nokia N-Series and E-Series devices. This never got out of the beta phase; while you could use Skype chat anywhere, the voice service was only to be available in a limited number of  countries (that did not overlap with countries where Skypephone was available).
• Skype Lite beta: building on the Skype for Mobile beta experience to a service that supports not only smartphones but also over 90 cell phones that support a Java client and include basic web browsing and data capability. According to the Skype Lite page it appears that Skype is working with carriers in ten countries to support this service.
• Truphone for iPhone 1.12 release: makes Truphone calls either over WiFi or any cellular network using an iPhone, building on their Truphone Anywhere experience.

Key features of these server-hosted VoIP client services:

• They are most cost effective when calling from your home country or local calling area. You could incur long distance or, when outside your home country, roaming charges that would run up quite quickly.
• An unlimited or high cap data plan minimizes costs associated with using these services.
• Only Skype provides a full Instant Messaging capability covering both chat and presence. Some Truphone offerings have shown support for SMS messaging.
• Calls to Skype contacts are free.
• Calls to mobile numbers outside U.S. and Canada will still invoke the charges incurred in “caller pays” mobile services.

Why only the cost of a local call? Your cell phone makes a call to a local number which puts the call through to the service’s SIP Gateway. At this point you connect into a Skype-to-Skype call for which there are no termination charges involved as a result of Skype’s unique (and secure) peer-to-peer architecture.  The same applies to Truphone where Truphone-to-Truphone calls are free.

This Skype Lite beta announcement portends that we could be seeing Skype-to-Skype calling, along the lines of 3′s popular Skypephone service in nine countries, become available to mobile customers having a much broader range of cell phones and in up to ten additional countries.

One other service that can be accessed from any phone is Mobivox. However, there you have to build up and manage your address book online such that VoxGirl can help you make your calls; it does not access your mobile phone address book. It’s purely a voice service with no messaging component (other than using SMS to facilitate setting up calls under certain circumstances).

While we’re getting a first step in driving down mobile costs for international calling, the next step needs to be finding a user-friendly way to drive out roaming costs. MaxRoam and Truphone’s SIM4Travel are starting to offer some hope on this front; however, at the moment their costs for USA-Canada calls are much more than my Rogers roaming charge. The winners will feature not only lower costs but a very friendly user interface, interacting with the device address book, that also provides the most complete ranges of services in terms of coverage and complementary conversation modes, such as IM.

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• Truphone for iPod Touch: Accessing Skype Contacts and Social Media

Two weeks ago I wrote about eComm 2009 and the announcement of Skype’s participation as a Platinum sponsor. Yesterday registration for eComm 2009 opened with a Super Early Bird Special pricing of $1,190.00 available to those who register prior to December 22, 2008 – a $600 discount from the Regular price that will apply after January 20, 2009..

But, as a Skype Journal reader, you can save even more. If you enter the promotional code “skypejournal”, you’ll get a 20% discount, taking that Super Early Bird price down to $952.

The speaker list is almost complete and Lee has announced a recently revised schedule.

Also note that eComm has arranged special conference group rates at the San Francisco Airport Marriott, available until February 8, 2009; note that, as has been my own experience at Marriott hotels for several years, all rooms have high speed Internet access included in the room rate.

An excellent deal for anyone who is interested in learning about developments in the rapidly evolving Emerging Communications space where Alec Saunders Voice 2.0 Manifesto is now turning into reality.

Tags: eComm2009, Lee Dryburgh, Voice 2.0 Manifesto

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