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MPEG-FAQ: multimedia compression [5/9]

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See reader questions & answers on this topic! - Help others by sharing your knowledge
		  email support
		  limited phone support
    Price:        15% of purchased product price (Free intro!)

                     Further Information
You can reach us at:
     North Valley Research, Inc.
     15262 NW Greenbrier Parkway
     Beaverton, OR 97006
     Tel: (503) 531-5705
     Fax: (503) 690-2320
     email (sales and marketing):
     email (technical questions):

This and other text-only versions of our product sheets are available via
anonymous ftp to (  Look in /pub/NVR.  We are happy
to mail paper versions of our product sheets on request.

If you require a demo version, please call or send mail to

Todd Brunhoff
Vice President, R&D
North Valley Research


~Subject: Demo of NVR Digital Media Development Kit

    $Revision: 1.2 $
    $Date: 1994/08/06 19:49:42 $

We are pleased to make available another release of NVR's digital media
development kit, version 2.0.3.  You should already have a license key.
If you don't, please contact us at

This version has several fixes for bugs and some important improvements
over version 2.0.2.  In particular:
   - Support added for Alias PIX files
   - Support added for playing XING sequences that have illegal syntax
     (extra picture info and non-increasing temporal references)
   - 400% speed improvement for RGB --> Y/Cr/Cb conversion in the compressor
     and imageop (you'll want this if you are compressing any rgb files,
     such as SGI rgb files).
   - the deinterlace operator (in imageop and the compressor) was broken
     in version 2.0.2.  You would only notice this if you are compressing
     abekas or other interlaced files.

The 2.0.x version is a significant improvement over our last major release,
1.0.4.  Briefly, this software offers:
   - MPEG video compression
   - image processing and compatibility with many image file formats,
     including JPEG, TIFF, SGI RGB and others.
   - MPEG audio compression
   - compatibility with a variety of audio files, including AIFF, AIFC
     Sun Audio and Parallax movie files.
   - MPEG system multiplexing
   - real-time, synchronized playback of any combination of video and audio
     files.   This means you can play back MPEG video files with AIFF, or
     you can play back MPEG system streams containing MPEG video and
     MPEG audio.  And everything in between
   - a variety of tools for converting image file formats and audio file
   - a real-time video/audio recording program (Sun and Parallax hardware

The software package is available in several pieces via anonymous ftp to


Look in /pub/NVR-software for the license 
agreement and README file.  It also contains about 25 megabytes of data and 
software, so first fetch the README file and read it to decide what you 
need.  If you only need the software, you should get one of


depending on the kind of hardware you have.

Turning on the software
If you already have a demo key from us, simply install the software 
described above and copy the file $NVRHOME/adm/keys/demokeys from the 
previous version into the same place in the new version.  Then type:

    % installkeys

This will give enable the software as before.  If you don't have a demo
key and would like one, please contact us at
internet:                                             c--Q Q
US:       Todd Brunhoff; North Valley Research;                         `
          15262 NW Greenbriar Pkwy; Beaverton, OR  97006                -
Phone:    (503) 690-2357
Fax:      (503) 690-2320


~Subject: How will I get the NVR-Software ?

From: Todd Brunhoff <>
Date: Tue, 18 May 93 09:23:26 -0700

The price list and text-only versions of our product sheets are available via
anonymous ftp to


Look in /pub/NVR-data-sheets.  
If you need glitzy paper versions to convey credibility, we are
happy to mail our product sheets on request.

The demonstration software package comes in several pieces via anonymous ftp to


Look in /pub/NVR-software for the license agreement
and README file.  Briefly you will need:
and some selection from
    /pub/contrib/mpeg and /pub/contrib/jpeg
depending on the kind of hardware you have.

If you get our software via ftp, send us an email note and we will give you
a demo license key so you can run it.
internet:                                             c--Q Q
US:       Todd Brunhoff; North Valley Research;                         `
          15262 NW Greenbriar Pkwy; Beaverton, OR  97006                -
Phone:    (503) 531-5707
Fax:      (503) 690-2320


~Subject: SUBSECTION - MacIntosh


~Subject: Cdi Tools v2.0

Cdi Tools v2.0 is a complete Cdi/Video CD Authoring solution targeted for
Mac C-programmer.
Contents of Cdi Tools are:
CDL - a real time scripting language
BD - disc image builder (630 MB cdi image with 25'000 assets was bildt in 7
min 40 sec.)
XLINK - MAC to OS9 cross linker
RTRView - utility for analyzing real time files
CDIView - utility for analyzing disc image files
Reference productions with Cdi Tools: Burn Cycle, Escape from Cyber City,
Video Speedway, Compton Encyclopedia, PGA Golf Tour

Pricing information:
MediaPlayback for PC/Mac                US$1,200.00
MediaPreview for Mac            US$3,995.00
MediaAuthor for PC/Mac          US$5,999.00

Media Integration & Consulting
Neubrunn, 8488 Turbenthal, Switzerland
Phone: (052) 454 281 Fax: (052) 453 138







~Subject: AMpeg

AMpeg  v4.3-- A simple Audio Mpeg Layer 1& 2 encoder and a Layer 1,2, & 3 decoder suite.

Source by ISO, compiled for MS-DOS by John Fulmer (


**Audio Mpeg Compression**

Audio Mpeg Compression is a proposed standardized sound compression technique put out by the International Standards Organization (ISO). So far there has been three flavors, Layer 1 Layer 2, and Layer 3.  It also features the following:

* 8:1 to 10:1 compression for general music audio with no audible sound degredation.

* 16:1 compression for general voice audio with no audible sound degredation.

* On the fly decompression and playback (the Xing Layer 2 player comes to mind).

* Xing also sells a Mpeg Layer 2 MCI driver for windows, and it's own encoder/decoder/editor package for windows.

*Will hopefully become a standard for audio communications.


Ampeg is a straight compile of ISO's freely available and distributed code for a Audio Mpeg Layer 1 and Layer 2 encoder and a Layer 1, 2, and 3 decoder. It was compiled using DJGPP C (the MS-DOS port of  GNU's C compiler) and falls under both IS0's and the FSF's copyrights (see ISOREL.txt and COPYING.TXT). ISO's orgional source code was only slightly changed to accomidate the DJGPP compiler's unique mindframe (a MS-DOS compiler that thinks it's a UNIX compiler, or vice versa). The orgional source code is a

vailable from ISO, or a affiliated ftp site, or the code for this version is available at the SIMTEL archive, or from me upon request. I've put minimal time into this, so don't expect perfection. It's just that no one else seems to have done the simple task of compiling this and releasing it in a usable form to the public.

AMPEG runs under MS-DOS and Windows (and probably OS/2), with minimal memory requirements. Also compatable with Xing's audio MPEG Layer 2 player for Windows.

The program is released as freeware and may be distributed freely, as long as this file, COPYING.TXT,  the Readme files, and all other documentation accompany it. If you don't like it, compile it yourself!

Note: This program had not been optimized in any way, and runs very slowly. For encoding, a 2MB file will take 5 minutes to process and a 20MB file will take at least an hour. Decoding is much faster but still fairly slow. However, I believe in the theory that a slow, free, useful program is better than no program at all.


AMPEG is made up of three components:

1) the aencode.exe program, which takes a PCM file (.WAV or .SND) and compresses it using Audio MPEG Layer 1 or Layer 2.

2) the adecode.exe program, which decodes Audio MPEG files into headerless PCM files (.SND). You can use a .SND to .WAV converter to reconvert the file to a .wav format.

3) the TABLE files, which both programs use to perform the MPEG compressions.

There are two ways of running aencode and adecode.

1) (RECOMMENED) just type AENCODE (or ADECODE) and the program will prompt you for whatever information it needs. This method is very solid and works nicely.

The possible options are:

Sampling Frequency  --> 44100(default), 48000, 32000
BitRate --> 64, 128, 256, 384(default)
Compression Layer --> 1 or 2

2) (NOT RECOMMENDED) type AMPEGIN (or AMPEGOUT) [options] <inputfile> <outputfile>. This takes the input file and applys the program defaults and produces the output file. THIS METHOD IS NOT RECOMMENDED AND MAY CAUSE YOU TO LOSE YOUR ORIGIONAL FILE! Only specifying the input file without the output file, will cause the input file to be erased! This is a bug due to the fact that this program was written for a UNIX environment and it's not worth it to me to hunt it down.


AMPEG needs to know where the TABLE files are. This is a pretty clunkly installation procedure, but it works....

1) put all non-text and non-executable files that were included in this .ZIP file into a directory by themselves called TABLESES.  Not good english, but necessary to get around a bug

2) AMPEG MUST BE RUN FROM the directory ABOVE TABLESES (ie, if TABLESES is located in C:/util/tables; AMPEG must be run from the C:/util directory).

3) Alternatively you can create a environment variable to point to TABLES. Add the following line to your autoexec.bat file:


where <path> is the path to the TABLESES directory. It seems that AMPEG looks for a directory whose name get corrupted somewhere in the AMPEG code. So if you name the directory "TABLESES" AMPEG will find it if 'TABLES'  is in the SET statement, if you name it "CHAIRSRS" Ampeg needs to be told "Chairs" in the Set statement. Anyway AMPEG should now run.

**Changes since 1.0 (first and last version)**

*Changed version name to match ISO's version.
*Found decoder source with layer 3 decompression.
*decompression runs MUCH faster.


I hold no responsibility for any damage, loss, or problems encountered in the use of this program. It is provided as-is, and there will be no future versions or bug fixes (unless ISO releases another).

John Fulmer (


~Subject: MAPLAYPC


DOS port of the realtime full quality mpeg audio player for 11/22/44 khz
playback on 486dx2 / p60 / p90 / higher + soundblaster 8/pro/16/awe. 
Original sources included.

Get it now!. MAPLAYPC, the msdos (blech!) port of the famous MAPLAY program. 
It's a realtime full-quality MPEG audio player for dx2-66 / p60 / p90 and
Soundblaster 8 / Pro / 16 / Awe .

On : /pub/demos/incoming/music/programs/ : /pub/msdos/programming/incoming/

Done by MikMak / HaRDCoDE '95


~Subject: More MPEG-Audio for MSDOS
From: (Richie B)
Date: Mon, 26 Feb 96 22:38:59 MET

Hi there,

MPEG layer II is really great, but for poor MS-Windows users, all
it offers is the Xing shareware decoder. This decoder only plays MONO
sound at low (really bad) quality. Since I started using MPEG encoding
for my own site recently, I ported 2 freeware MPEG 2 decoder to MSDOS
(namely "maplay" and "mpegaudio"). They are at:

Perhaps they are of some use to you guys.



~Subject: layr_200

From: "Matthias Hanft" <>
Date:          Thu, 23 Jun 1994 18:10:28 +0200
Subject:       SUN and PC Version of MPEG Audio Codec Shareware

SOFTWARE: MPEG Audio Layer 3 Shareware Codec and Windows Realtime Player

MPEG Audio Codec and Windows REALTIME Player from Fraunhofer IIS

Fraunhofer IIS announces l3enc/l3dec V2.00 and WinPlay3 V1.00.

For high quality audio compression, the shareware l3enc/l3dec V2.00
package is available for Linux, SUN, NeXT and DOS on
Versions for SGI and HP will follow soon.

The shareware package for DOS
includes a demo version of WinPlay3, a Windows MPEG Audio Layer 3

With MPEG Audio Layer 3 you can get a 12:1 compression with a CD like
Instead of 12 MByte / minute (stereo 44.1 kHz) you only need about
1 Mbyte / minute!

More information can be found on
or contact <>

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