History

• Minor editorial changes to documentation.
• Removed -markers in documentation.

• Changing default (reference!) codebook size from 16 to 64. Note: this will change the results from previous (beta) versions of the Reference System.
• The Reference System now unpacks into a directory named like the version of the Reference System. Documentation updated accordingly.
• Changed web address for latest version of the Reference System.
• 'make' or 'make info' now lists available make targets.
• Created scripts that compute the EER (eer.csh that uses eer.awk). They can be installed on the system with make.
• 'make test' now computes the EER and creates the data file for a DET-plot after the experiment has been run.
• 'make compare' now also compares the DET data file with a reference file. Updated documentation accordingly. The DET-plot and EER scripts are new and their portability has not yet been tested. Please report problems to melin@speech.kth.se.
• Added links to source code files referred to in the text.
• Added a new section with recognition results.
• Added a new section with a list of files in the distribution and links to them.
• Added PowerPoint and HTML versions of a presentation of the reference system.

• All source code to the reference system is now distributed with documentation. See the copyright notice for terms of copying and usage.
• Numbering sections in the documentation.
• Preliminary scoring software has been added:
  • Can still do only the test set ROC and not compute EER.
  • Scripts are installed by makefile.
  • Documented in section 7.

• Documentation:
  • Added references for WG4, EAGLES handbook, VQ and world model score normalization.
  • Marked those engine properties in Table 2 that must not be changed for the system to perform as the reference system.
  • Updated copyright regulations.
  • Minor formatting changes.
  • Other minor changes.

• The default LPC configuration options have been changed from "-f200 -o30 -p8 -s1" to "-f200 -o60 -p12 -a0.97 -s1". The new setting chooses 12th order LPC with 100 frames per second computed from a 25 ms analysis window (200 point windows with 60% overlap), assuming the input signal has 8000 Hz sampling rate. The preemphasis coefficient is now 0.97 instead of 0.95.
• It is now possible to specify whether score normalization shall be used or not, using the "normalization" property in the ReferenceSystem class. If normaliation is enabled, a set of non-client models can also be specified using the "nonClientModels" property. For each verification test, the model in the set with the smallest distance (highest score) is chosen for score normalization. This feature can be used for instance to specify a pair of gender-dependent non-client models instead of a single world model. Default is to use a single world model called "W".
• Experiment definition files for version 2.0 of Polycost baseline experiments are now included in experiment/polycost/be[1-3]/v2.0. To run a Polycost baseline experiment, type 'make beX'.
• A new chapter in the documentation that describes the operation of the reference system. Some minor changes to the documentation have also been made.
• string.h is now included where needed (avoids warnings when compiling on IRIX with cc).
• A Windows style zip-file with the Polycost subset needed for the calibration test is now available here.
• A bugfix in src/concat.c: the main function previously had a return type void which caused different exit codes on different platforms. It now has an int return type and returns 0 on successful operation.

• Installation notes have been improved to better describe how to install the Tcl package cost250.
• Added error detection and presentation. Previously most errors in the Tcl code were not caught and resulted in an uninterpretable trace dump.
• The database object is now flexible with upper and lower case letters in the tag and filename extension when looking for a file in the database. If the file is not found with a name exactly as given by tag and extension, it tries several combinations of upper and lower case conversions. This feature is useful in connection with files stored (or copied from) CD-ROMs since your system interpret file name on CD-ROM as only upper case or only lower case, etc.
• Files in the distributed tar-file now unfold into a directory refsys as stated in the manual.
• ANSI-C functions OpenFile and CloseFile in file src/sr.c now exit with value 1 upon error. All functions in this file print an error on a new fresh line.