-- Features CAMpeg RT Encoding Software, IEEE-1394 Adapter and Cable,
and DVD Authoring Software For DVD Publishing

SAN JOSE, CA, (February 21, 2001) – MedioStream, Inc. today announced
CAMpeg RT, a complete DVD publishing system for creating MPEG-2 files
suitable for streaming on desktop PCs as well as for DVD publishing,
video editing, or archiving.

MedioStream’s new solution for video enthusiasts and consumers includes
its new CAMpeg RT real-time DV to MPEG-2 transcoder software,
MedioStream IEEE-1394 FireWire adapter and cable, and a special release
of Sonic Solutions MyDVD software for authoring videos onto recordable
CD or DVD discs.

MedioStream’s CAMpeg RT converts digital video from a DV camcorder to an
MPEG-2 file in full D1 resolution at 30 frames per second. Users who
purchase the entire package have a complete solution, which will run on
Pentium III or AMD Athlon CPUs, as well as on Celeron 533A MHz or higher
CPUs with SSE (Streaming SIMD Extension) support.

Users simply plug in a mini DV Camcorder to the MedioStream FireWire
(IEEE-1394) card port, install the CAMpeg RT encoding and DVD authoring
software, and they are ready to create full-motion and full-screen DVD
quality video on their computer and share it with anyone. The estimated
street price of CAMpeg RT with IEEE-1394 FireWire Card and cable, and
DVD authoring software is $199. CAMpeg RT is currently available in the
U.S. International versions with PAL support will ship in 60 days.

CAMpeg RT provides the ability to create an MPEG-2 file from a DV
camcorder using your notebook or desktop PC. This breakthrough in full
motion video and audio processing is made possible by an advanced
algorithm, which enables full D1 resolution DV decoding and MPEG-2
encoding in real-time simultaneously at a full frame rate.

CAMpeg RT transcoding software has user-friendly features that allow
users to select the video segments that they want to transcode from
their DV camcorder. The on-screen control menu is easy to use, and is
designed to assist the user to create an MPEG-2 program stream or DVD
compliant stream on the fly.

MedioStream’s IEEE-1394 host adapter provides high-speed file transfers
to 400 Mb/sec. It is OHCI-compliant and includes 2 IEEE 1394 ports
which can act as a multi-function adapter. Each port may be used for
peer-to-peer networking or as controller for 1394-ready peripherals such
as digital cameras, camcorders, printers, or scanners. The host adapter
will enable all existing systems to be IEEE 1394 ready.

MyDVD software from Sonic Solutions provides a fast and easy way to
create interactive DVD projects with CAMpeg video streams. MyDVD allows
a user to build menus, preview the project and record it onto CD or DVD
media. DVD playback software is included so that recorded CDs and DVDs
can be played back on virtually any PC.

“We’re delighted to partner with MedioStream to provide a powerful
software-based solution for video encoding and DVD authoring,” said
James Manning, MyDVD Product Manager at Sonic Solutions. “With CAMpeg
RT transcoding and MyDVD authoring, consumers can quickly and easily
create more exciting personal videos with better picture quality and
much more interactivity.”

About MedioStream, Inc.

Formerly known as Medio Systems, Inc., MedioStream, Inc. is a pioneer of
Host Signal Processing (HSP) technology for real-time MPEG-2 and DV
codecs, and is also a solution provider for rich media over the Internet
to Original Equipment Manufacturers (OEMs). MedioStream's streaming and
broadcasting solutions include network software and systems as well as
embedded technology. The company is based in San Jose, California. For
more information, visit MedioStream's web site at www.mediostream.com or
call 408/452-5500.

About MyDVD

The first DVD authoring application for consumers, MyDVD makes it easy
to capture "your life on DVD." With its remarkably friendly user
interface and intuitive authoring, MyDVD makes it possible for home
video enthusiasts to take video, music, digital photos, and scanned
artwork and create their own interactive movies. Users can record their
finished DVD projects to low-cost CD-R devices, and MyDVD automatically
writes a software player on the disc, making it easy to publish
interactive videos on universal, low-cost media and play them back on
virtually any PC.

About Sonic Solutions (NASDAQ: SNIC)

Based in Marin County, California, Sonic (http://www.sonic.com) is the
leading manufacturer of solutions for DVD publishing. Sonic DVDit!™
(http://www.dvdit.com) is the first application for DVD authoring
targeted at videographers and corporate video producers, and is bundled
with major video editing, capture, encoding and media production
systems. Sonic MyDVD™ (http://www.mydvd.sonic.com) is the first DVD
authoring application for consumers, making it easy to capture "your
life on DVD." Sonic DVD Creator® and Sonic DVD Fusion® are the most
widely-used systems for professional DVD publishing, and are installed
worldwide at major studios, post production facilities and in corporate
marketing departments. SonicStudio™ HD is the leading digital
workstation for preparing audio for release on CD and is the first for
creating content for the new DVD-Audio format. Sonic is also a full
voting member of the DVD Forum, the standards-setting body for the DVD
format.

Trademark Acknowledgement

Medio DVision, Medio MVision and CAMpeg are trademarks of MedioStream,
Inc. Microsoft and Windows are registered trademarks of Microsoft
Corporation in the United States and/or other countries. Celeron,
Pentium II and Pentium III are registered trademarks of Intel
Corporation in the United States and/or other countries. Athlon and K6
are registered trademarks of AMD Corporation in the United States and/or
other countries.