| Release Schedule |
April 1999 |
January 2003 |
2004 |
| Operating Systems |
Windows 95, Windows 98, Windows NT 4.0, Windows 2000, Windows Millennium Edition, Windows XP, and Mac OS 8.1 |
Windows 98, Windows 2000, Windows Millennium Edition, and Windows XP |
Windows XP, and non-Windows–based portable and network devices |
| Portable Device Support |
Supports SDMI devices, non-SDMI devices, and portable media |
Supports SDMI devices, non-SDMI devices, and portable media |
Portable audio players, mobile phones, set-top boxes, and DVD players that support Windows Media DRM playback |
| Codecs |
Windows Media Audio 1, 2, and 7, Windows Media Video 7, Microsoft MPEG-4 version 1 through 3, ISO MPEG-4 version 1, ACELP, Voxware, ATRAC-3 |
Windows Media Audio 1, 2, 7, 8, 9, 9 Professional, and 9 Voice, Windows Media Video 7, 8, 9 and 9 Image, Microsoft MPEG-4 version 1 through 3, ISO MPEG-4 version 1, and Windows Media Screen 7
Only DMO codecs supported for added security. |
Windows Media Audio 1, 2, 7, 8, 9, 9 Professional, and 9 Voice, Windows Media Video 7, 8, 9 and 9 Image, Microsoft MPEG-4 version 1 through 3, ISO MPEG-4 version 1, and Windows Media Screen 7 |
| Business Rules |
- Expiration date
- Unlimited play
- Transfer to SDMI/non-SDMI
- Burn to CD
|
Same, plus:
- Expiration date
- Unlimited play
- Transfer to SDMI/non-SDMI
- Burn to CD
- Start time
- End time
- Duration
- Counted operations (plays, transfers)
* Supported on PCs
|
Same, plus:
- Expiration date
- Unlimited play
- Burn to CD
- Start time
- End time
- Duration
- Counted operations (plays, transfers)
*All but the burn to CD scenario are supported on portable devices |
| User Experience |
Silent licensing and pre-delivery of licenses are not supported . Users are very aware of the extra steps that they have to go through. |
- Silent licensing
- Pre-delivery of licenses
- Backup and restore of licenses
- Modal dialogs within players
- License management
|
- Greater device functionality
- Subscription content transfer to devices
- Faster license acquisition and renewal
- Playback of protected content on network devices
|
Security
|
Encryption of content and license |
Encryption of content and license, plus:
- Individualization
- Secure Audio Path (Windows Millennium Edition and Windows XP)
- Revocation of player application
- Revocation of content (version 7.1 and later)
- Exclusion of player application (version 7.1 and later)
- Exclusion of Protected Content Module (version 7.1 and later)
|
Same, plus revocation and exclusion are extended to portable devices and network devices. |