/// TwinVQ Encoder for Windows 95/NT4.0 Version 2.1.1 ///

 The TwinVQ Encoder is demo software that allows you to
 crate TwinVQ music data. Note that this software will be
 expired on June 30,1998.

[1. Required System Environment]

   OS    : Microsoft Windows 95, Windows NT 4.0
   CPU   : Pentium 75MHz or more. MMX Pentium is recommended.
   Sound : Sound system supporting 16 bit stereo sound
       SoundBlaster16-compatible sound card is
       recommended.
           
2. A change point from version 2.0.0 alpha

  The "New version of TWINVQ Encoder for Window" makes possible
  for computers with MMX technology Pentium(R) processors to
  encoding original data with 20-30% speed up than ever before
  version.

3. Encoding performance

   The following are approximate encoding times and files sizes
   that are required by the this version encoder:

   [MMX Pentium 150MHz : Quality is normal]
   44kHz sampling for stereo :approximately   5-  6 times
   22kHz sampling for stereo :approximately 2.5-  3 times
   11kHz sampling for stereo :approximately 1.2-1.5 times

   [MMX Pentium II 300MHz : Quality is normal]
   44kHz sampling for stereo :approximately 1.9-  2 times
   22kHz sampling for stereo :approximately 1.0-1.1 times
   11kHz sampling for stereo :approximately 0.5-0.6 times

4. Installation

  Execute the download file, 'TwinVQ Encoder' for Windows.
  'TwinVQ Encoder' is zip archive file.
  After extraction following files will be created.

   decode32.dll     ;dll file (decoding engine)
   Encode32.dll     ;dll file (encoding engine)
   Encoder21e.exe   ;TwinVQ Encoder program file
   License.txt      ;License agreement
   Readme-e.txt     ;This file
   TwinVQ2.cdb      ;TwinVQ codebook table

5. Encoding mode

   8kHz samplig  8kbps/ch
  11kHz samplig  8kbps/ch, 10kbps/ch
  16kHz samplig 16kbps/ch
  22kHz samplig 20kbps/ch, 24kbps/ch, 32kbps/ch
  44kHz samplig 40kbps/ch, 48kbps/ch

6. About encoding

6.1 Source : .Select the source file for encoding.

 Browse button:

 Click this button to open the dialog to select the audio data
 for encoding.When you select a file, the file name appears in
 the File message box and the sound format of the file appears
 in the Format box. Supported audio files are ; ".wav" (Windows
 WAVE format), ".aif" or ".aiff" (Apple AIFF format). All other
 formats are judged to be Raw PCM format.

 The bit resolution is 8 bits/16 bits and only non-compressed
 files can be encoded.

 When moving a Macintosh file to a Windows machine, please make
 sure that it is not MacBinary.

 If you select a file with an extension other than ".wav", 
 ".aif" or ".aiff," you will need to manually set the file type,
 bit resolution, sampling frequency and number of channels
(Stereo/Mono), etc.

Play button:

 Click this button to start playback of the audio data displayed
 in the File window. This can be used to check the sound and its
 quality prior to encoding.

6. 2 Destination :  Specify the output of the encoded result

 Browse button:

 Click this button to open the dialog to specify the destination
 to which the encoded result will be output. When indicated, the
 filename is displayed in the File box. Normally, the
 automatically specified filename will consist of the file name
 selected for encoding, with the extension changed to ".vqf".

 Play button:

 Click this button to start playback of the TwinVQ file 
 displayed in the File box.
 This can be used  to check the quality after encoding.

6. 3 Compresssion : Selection of compression mode

 Encode Mode

 Selects the compression mode. The compression mode will change
 according to the audio data file being compressed, as shown
 below.
 Source sampling frequency Compression mode Compression rate per
 channel
 
         8KHz/ 8Kbps/ch  8kbit/s
    11KHz/ 8Kbps/ch  8kbit/s
    11KHz/10Kbps/ch 10kbit/s
    16KHz/16Kbps/ch 16kbit/s
    22KHz/20Kbps/ch 20kbit/s
    22KHz/24Kbps/ch 24kbit/s
    44KHz/40Kbps/ch 40kbit/s
    44KHz/48Kbps/ch 48kbit/s

 Channels

 The number of channels that the compressed file will have can
 be specified as stereo/mono. It is not possible for the
 compressed data to have more channels than the original data.

 Quality

 You may give priority either to sound quality or to compression
 speed by selecting one of the following three choices for
 compression. Normally you will select Normal.
 The Quality setting that is selected will have no effect on the
 data transfer rate of the compressed data.
 "High" :Sound quality is given priority. The compression speed
 is the slowest.
 "Normal": There will be an equal balance between sound quality
 and compression speed.
 "Low" :Compression speed is given priority. The sound quality
  may be slightly lower.


 6. 4 Description : Enter information regarding the compressed
                    data

  Title
  Enter the title for display on the player. 
  Entry of the Title is required.

  Comment
  Enter any information.

  filename
  If "Permission to save" is checked, this filename is used as
  default filename to save.
  The last of this must be end with ".vqf".


7. Server settings

  It is enough to paste a link by writing A HREF-filename in the
  file. The files which allow pasting of a link include the
  TwinVQ Compression Files (extension .vqf) and TwinVQ Locator
  File (extenxion .vql)

    Extensions     .vqf, .vql
    MIME type      audio/x-twinvq

8.  Known Problems

 When "MWAVE" (used on many computers manufactured by IBM ) is
 used to produce sound, the sound is fragmented.
 When a Pentium CPU of 75MHz or less is used to playback a 44KHz
 stereo TwinvVQ file, the sound is fragmented (insufficient
 processing power).
 Sometimes this happens to NotePC users w/Pentium 120MHz or 
 worse.

'TwinVQ Encoder' for Windows Version 2.1.1
 NTT Corporation                                 3/11/1998
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Information in this document is subject to change, without a
prior notice, for the purpose of improvement.
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a third partyarising out of, or in relation to, the use ofany
data contained in this document.
This document shall not be reproduced or transmitted (in any
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for any purpose,) without the express written permission of NTT.
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