Updates for the Sanyo 9000 review

, posted: 4-Apr-2006 15:55

I've had some more information and clarifications from both Groove Mobile and Telecom New Zealand on the Sanyo 9000 review I wrote recently.

Starting with the encoding type for the music files, it is AAC+ and you can read about it in this Wikipedia article on MPEG-4 CODECs. It was developed for Groove Mobile by Coding Technologies, according to Bennet Ratcliff of Ratcliff Strategies who wrote in to explain this. Telecom also says the music is in AAC+ format.

The KOZ format I mentioned functions only as a DRM wrapper for the AAC+ encoded files, according to Telecom. Ratcliff however disagrees with this, and says:

The Groove Mobile DRM was incorrectly refered to as KOZ — it is not KOZ. The KOZ codec plays no role in the Telecom NZ music service.

I understand that your information from Telecom NZ may have led you to this. I have contacted them, and they are now aware that the Groove Mobile DRM is not KOZ and should not be referred to as KOZ.

I haven't been able to locate a full description of what KOZ is, but Michelle Daniels, one of the researchers behind it, wrote this abstract on her website:

An overview of the high quality, full-bandwidth, low-bitrate, scalable KOZ audio codec technology is presented. This new compression method grew out of developments in the control of chaotic systems that allow for the creation of broad spectral components with only a few bits of information. These elements are combined with a high-resolution analysis of the audio signal that allows the signal to be decomposed into tonal, noise-like, and transient objects. Psychoacoustic principles have been adapted to prioritize and quantize these objects. The reconstructed signal is built up in layers from the prioritized objects, resulting in a scalable format. Metadata and built-in digital rights management are present in the digital filestream. The decoder is a very low-complexity algorithm that is implemented on a wide variety of portable devices such as cell phones in a software-only solution running on fixed-point processors without DSP support.

Clearly, the phone uses *.KOZ files, a CODEC technology with DRM, developed by Chaotic Systems which changed its name to Groove Mobile according to this PDF press release. Strange stuff, but hope someone will be able to give me the definite answer to this soon - since it seems to be so important for Groove Mobile.

Telecom has compared its music files with those from Vodafone Live! and say that spectral analysis shows the audio quality be on par or better with the competing 3G music store offerings. Digging further into the question then as to why they didn't sound so good, Telecom says it'll investigate this further. One theory is that the handset itself doesn't have that good sound circuitry.

One thing I didn't know before was the format used for the streaming video. Telecom has this to say about it:

Telecom New Zealand was in fact one of the first mobile operators in the world to adopt and deliver H.264 video content to mobile. Whilst some content may still be delivered in earlier versions of the MPEG4 standard, generally the streams available on EV-DO devices will be inthe newer format. Here's some info from Apple on H.264...

"H.264 delivers stunning quality at remarkably low data rates. Ratified as part of the MPEG-4 standard (MPEG-4 Part 10), this ultra-efficient technology gives you excellent results across a broad range of
bandwidths, from 3G for mobile devices to iChat AV for video conferencing to HD for broadcast and DVD."

So there you have it: when you're streaming video over Telecom's 3G service, it's in glorious H.264. Very cool.

Finally, I made the same mistake with Telecom's 3G service as I did with Vodafone's: you don't pay for data charges when downloading songs or other content; nor do you pay for browsing the site itself. I'm just checking to see if using the email client to send and receive Xtra email is free of data charges as well... if it is, it could be semi-useful.

Other related posts:
Travelling gear
Sony Tablet S reviewed
Nokia N9 reviewed

comments powered by Disqus


Google News search
IT News
PC World New Zealand
Computerworld NZ
PC World and Computerworld Australia
PC World US
Computerworld US
NZ Herald
Virus Bulletin

Content copyright © Juha Saarinen. If you wish to use the content of my blog on your site, please contact me for details. I'm usually happy to share my material as long as it's not for spamblogs and content farms. Please attribute with a link back to this blog. If you wish to advertise on my blog, please drop me an email to discuss the details.
Comments policy All comments posted on this blog are the copyright and responsibility of the submitters in question. Comments commercial and promotional in nature are not allowed. Please ensure that your comments are on topic and refrain from making personal remarks.