4.1.2 (2009.02.12)
===================

[SRILM support]
 - Added swapping "<s>" and "</s>" when reading BACKWARD ARPA file
   trained by SRILM.  It will be automatically detected.  If detection
   fails, you can specify an option "-swap" in mkbingram to do that.
 - Internally modify the unigram probability of "<s>" or "</s>", since
   they may be set to "-99" in SRILM model.  The same value as
   opposite will be assigned.
[N-gram]
 - Size limit extended from 2GB to 4GB for big N-gram.
 - "<unk>" and "<UNK>" can be changed by "-mapunk".
 - More strict check for unknown words: Julius now terminates with
   error when dictionary has OOV words and N-gram is not open (no unk word).
[Improvements]
 - Faster successor list building algorithm
 - Update yomi2voca.pl to cover more minor Japanese pronunciation.
 - Workaround for audio buffer overrun in ALSA
[JuliusLib]
 - Added API function "j_close_stream()" to exit main recognition loop.
[Bug Fixes]
 - Fixed segfault on adintool when specifying multiple servers.
 - Fixed compilation error on cygwin (libesd)
 - Fixed segfault when not specifying "-input" option.


4.1.1 (2008.12.13)
===================
Bug fixes:

[N-gram]
  - sometimes could not read an ARPA N-gram file trained by SRILM.
[A/D-in]
  - "-input stdin" does not work.
  - "SOURCERATE" at "-htkconf" is ignored.
[Forced alignments]
  - now can be used in isolated word recognition and with "-1pass".
  - "-palign", "-walign" and "-salign" can not be run together at a time.
[Module mode]
  - freezes when a grammar is specified by its ID number.
  - wrong grammar ID in recognition result (GRAM=.. always 0)
  - "SYNCGRAM" will cause crash at isolated word recognition.
  - unable to receive/activate/dactivate on isolated word recognition.
[Others]
  - fails to compile on several OS (needs "-ldl").
  - does not handle backslash escaping correctly in Jconf file.
  - does not output the 1st pass result as a final result with "-1pass".
[Tools]
  Jcontrol
  - does not support "graminfo" command.
  - can not send a dictionary to Julius running isolated word recognition.
  mkdfa
  - segfault on mkfa
  - fails to read a grammar file on DOS format.
  adintool
  - wrong behavior when splitting a long audio file.
  - now output time of each segment.


4.1 (2008.10.3)
================
New plugin extension:
  - supported types:
      - A/D-in plugin
      - feature vector input plugin
      - audio input monitor / postprocess plugin
      - feature vector monitor / postprocess plugin
      - result plugin
      - can add arbitrary JuliusLib callback via plugin
  - sample codes is included, with full documentation of function spec.
  - run on Linux, Windows and other unix variants with dlopen() capability

Newly supported features:
  - multi-stream feature input
  - MSD-HMM (compatible with "HTS" toolkit)
  - CVN 
  - frequency warping for VTLN (no estimation yet)
  - "-input alsa", "-input oss" and "-input esd"
  - perl version of jcontrol client "jclient-perl"

Modified:
  - Restrict option orders when multiple instances defined (-AM, -LM, -SR):
      - Option should be just after correspondence instance declaration. 
        (ex. LM options should be placed after "-LM" and before other 
        instance declaration.)
      - Global option should be before any instance declaration, or
        just after "-GLOBAL" option.
    This new restriction can be removed by "-nosectioncheck" option.

Fixed bugs:
  - "-record" fails to record the first silence part!
  - Not working "-multigramout"
  - environment variable expansion sometimes fail within jconf file.
  - limits extended:
     maximum HMM name length = 256 char, Number of HMM states unlimited.
  - Module mode error message on grammar command.

Documents:
  - Alpha version of "Juliusbook" (contains only manuals at this time)
  - Unix manuals are moved to "man" directory.


4.0.2 (2008.5.27)
==================
New features:

  - New option "-fallback1pass" will output 1st pass result as final result
    when the 2nd pass fails.
  - Added support for "USEPOWER=T" on feature extraction.

Modified:
  - "-AM_GMM" becomes optional: GMM will share AM params if not specified.

Fixed:
  - GMM rejection does not work (since 4.0.1)
  - Cannot specify other A/D device on Linux/ALSA correctly.
  - Sometimes fails to read a big N-gram.
  - Sometimes crush with "-record" option.
  - Callback timing modified on real-time input with sp-segment/GMM/VAD.
  - Other minor fixes.


4.0.1 (2008.3.12)
==================
New features:

  A/D-in
    - ALSA now become default on Linux instead of OSS.

  Module mode
    - "ACTIVATEGRAM", "DEACTIVATEGRAM" and "DELGRAM" now accepts
      grammar name as arguments in addition to grammar ID number.
    - new command "GRAMINFO" to get list of current grammars.


Fixed bugs:

  A/D-in
    - ALSA codes updated to work on 1.x drivers.
    - segfault with "-48".
    - segfault on MFCC input with zero frames with "-spsegment".
  VAD
    - CMN not working on spsegment/GMM-VAD/decoder-VAD with microphone input.
  Acoustic model
    - Error when no short-pause model defined in multi-path mode.
  N-gram
    - incorrect 2-gram prob on 1st pass with backward N-gram only.
    - incorrect 1-gram prob for unknown words.
    - fail to read some ARPA files with no back-off compaction.
    - read failure or segfault on big N-gram with over 24bit entries.
    - redundant index for back-off weights in some case. 
  Word recognition
    - incorrect N-best output with "-output N" on word recognition.
  Installation
    - "make install" fails on cygwin.
  Source code
    - Static variables in functions that are not meant to be static
      are made local.
    - Global variables in search are moved to StackDecode.



4.0 (2007.12.19)
=================
For more detail about new features in 4.0, please see other document.

- Re-constructed all data structures and re-organize source code.
- Core engine now becomes a library called JuliusLib, with API and callbacks.
- Multi-model decoding now available.
- Modularize language model handling, and merge Julian to JuliusLib.
- Support longer N-gram (N > 3).
- User-defined LM function support.
- Handy isolated word recognition mode.
- Confusion network output.
- Improvements in short-pause segmentation, especially for live input.
- GMM-based VAD.
- Decoder-based VAD.
- Integrated many compile-time options.
- Reduce memory usage.
- Sample application to use the JuliusLib is included: "julius-simple".
- Update tools:
   - "adintool" supports multi-server mode.
   - "generate-ngram" newly added to generate sentences from N-gram


3.5.3 (2006.12.29)
===================
  o  Improved Performance:
     - acoustic computation optimized: now becomes 20%-40% faster!
     - optimize memory access: re-use work area of deleted hypothesis
       in the 2nd pass.
     - some memory allocation improvement on dictionary and word trellis.

  o  New Grammar Tools:
     - "dfa_minimize", "dfa_determinize" will minimize/determinize DFA.
        mkdfa.pl now calls dfa_mimize in it.
     - "slf2dfa": a toolkit to convert HTK slf to Julian dfa (separate kit)

  o  Embedding HTK Acoustic Parameters:
     - add option to load HTK Config file to set correct acoustic parameter
       configuration at recognition time. 
     - the acoustic parameter configuration can be embedded into
       header of a binary HMM file.

  o  Improved Word Graph:
     - add an option to completely separate graph words: words with
       different phone contexts can be output separatedly by
       "-graphrange -1".

  o  Support for online energy normalization:
     - Preliminary support for live recognition using acoustic model with
       energy normalization. (approximate with maximum energy of last input)

  o  Code refinements:
     - re-organize libsent/src/wav2mfcc.
     - modularize acoustic parameter (Value) handling.
     - output compile-time configuration of libsent with "--setting" option.
     - Doxygen 1.5.0 support.
     - "julius-info@lists.sourceforge.jp" becomes the official contact address.
     - fixed typo on copyright notice.

  o  Fixed bugs:
     - sometimes unable to read a binary LM on "--enable-words-int".
     - memory leaks around option handling, global variables and local buffers.
     - segmentation fault on very long input.
     - doublely counted initial state of DFA.
     - mkdfa.pl: unable to find mkfa on some OS.
     - adintool: makes empty output file on termination.
     - adintool: miss last inputs when killed.
     - other small changes.


3.5.2 (2006.07.31)
===================
  o  Speed-up and improvement on Windows console:
     - Support DirectSound for better input handling
     - Support input threading utilizing callback API on portaudio.
     - Support newest MinGW (tested on 5.0.2)

  o  More accurate word graph output:
     - Add option to cut the resulting graph by its depth
       (option -graphcut, and enabled by default!)
     - Set limit for post-processing loop to avoid infinite loop
       (option -graphboundloop, and set by default)
     - Refine graph generation algorithm concerning dynamic word merging
       and search termination on the second pass.

  o  Add capability to output word graph instead of trellis on 1st pass:
     - 1st pass generates word graph instead of word trellis as
       intermediate result by specifying "--enable-word-graph".
       In that case, the 2nd pass will be restricted on the graph, not
       on the whole trellis.
     - With "--enable-word-graph" and "--enable-wpair" option, the
       first pass of Julius can perform 1-pass graph generation based
       on 2-gram with basically the same algorithm as other popular
       word graph based decoders.

  o  Bug fixes:
     - configure script did not work on Solaris 8/9
     - "-gprune none" did not work on tied-mixture AM
     - Incorrect error message for AM with duration header other than "NULLD"
     - Always warns abount zero frame stripping upon MFCC

  o  Imprementation improvements:
     - bmalloc2-based AM memory management


3.5.1 (2006.03.31)
===================
  o  Wider MFCC types support:
     - Added extraction of acceleration coefficients (_A).  Now you
       can recognize waveform or microphone input with AM trained with _A.
     - Support all MFCC qualifiers (_0, _E, _N, _D, _A, _N, _Z) and their
       combination 
     - Support for any vector lenth (will be guessed from AM header)
     - New option: "-accwin"
     - New option "-zmeanframe": frame-wise DC offset removal, like HTK
     - New options to specify detailed analysis parameters (see manual):
          -preemph, -fbank, -ceplif, -rawe / -norawe, 
          -enormal / -noenormal, -escale, -silfloor

  o Improved microphone / network recognition by MAP-CMN:
     - New option "-cmnmapweight" to change MAP weight
     - Option "-cmnload" can be used to specify the initial cepstral
       mean at startup
     - Cepstral mean of last 5 second input is used as an initial mean
       for each input.  You can inhibit updating of the initial mean
       and keep the value loaded by "-cmnload" by option "-cmnnoupdate".

  o Module issue:
     - Julius now outputs "<STARTPROC/>" when recognition starts, and
       "<STOPPROC/>" after recognition stopped by module command.
       Use this for safer server-client synchronization.
     - now can specify grammar name from client by specifying a name
       after a command like "ADDGRAM name" or "CHANGEGRAM name".

  o Bug fixes:
     - Sometimes segfault on pause/resume command on module mode while input.
     - Can not read N-gram with tuples > 2^24.
     - Can not read HMM with 3-state (1 output state) model on multi-path.
     - Sometimes omit the last transition definition in DFA file.
     - Sometimes fails to compile the gramtools on MacOSX.


3.5 (2005.11.11)
=================
  o  New features:
     - Input verification / rejection using GMM (-gmm, -gmmnum, -gmmreject)
     - Word graph output (--enable-graphout, --enable-graphout-nbest)
     - Pruning on 2nd pass based on local posterior CM (--enable-cmthres)
     - Multiple/per-grammar recognition (-gram, -gramlist, -multigramout) 
     - Can specify multiple grammars at startup: "-gram prefix1,prefix2,..."
       or "-gramlist listfile" where listfile contains list of prefixes.
     - General output character set conversion "-charconv from to"
       based on iconv (Linux) or Win32API+libjcode (Windows)

  o  Improved audio inputs on Linux:
     - ALSA-1.x support. (--with-mictype=alsa)
     - EsounD daemon input support. (--with-mictype=esd)
     - Fixed some bugs on USB audio input.
     - Audio capturing device can be specified via env. "AUDIODEV".
     - Extra microphone API support using portaudio and spLib API.

  o  Performance improvements:
     - Reduced memory size for beam operation on the 1st pass.
     - Slightly optimized tree lexicon by removing redundant data.
     - Reduced size of word N-gram index (reduced from 32 bit to 24 bit).

  o  Fixed bugs:
     - Not working spectral subtraction.
     - Memory leak when stack exhausted ("stack empty") on 2nd pass.
     - Segmentation fault on a very short input of 1 to 4 frames.
     - AM trained with no CMN cannot be used with waveform/mic input.
     - Wrong short-pause word handling on successive decoding mode.
       (--enable-sp-segment)
     - No output of "maxcodebooksize" at startup.
     - No output of the number of sentences found when stack exhausted.
     - No output of "-separatescore" on module mode.
     - Beam width does not adjusted when grammar has been changed and 
       full beam options (-b 0) is specified in Julian.
     - Wrong update of category-aware cross-word triphones when
       dynamically switching grammar on Julian.
     - No output of grammar to stdout on multiple grammar mode.
     - Unable to send/receive audio data between different endian machines.
     - (Linux) crash when compiled with icc.
     - (Linux) some strange behavior on USB audio.
     - (Windows) confuse with CR/LF newline inputs in several text inputs.
     - (Windows) mkdfa.pl could not work on cygwin.
     - (Windows) sometimes fails to read a file when not using zlib.
     - (Windows) wrong file suffix when recording with "-record" (.raw->.wav)

  o  Unified source code:
     - Linux and Windows version are integrated into one source.
     - Multi-path version has been integrated with the normal version
       into one source.  The multi-path version of Julius/Julian, that
       allows any transitions of HMMs including model skip transition,
       can be compiled by "--enable-multipath" option.  The part of
       source codes for the multi-path version can be identified 
       by the definition "MULTIPATH_VERSION".

  o  Other improvements:
     - Now can be compiled on MinGW/MSYS on Windows
     - Totally rewritten comments in entire source in Doxygen format.
       You can generate fully browsable source documents in English.
       Try "make doxygen" at the top directory (you need doxygen installed)
     - Install additional executables of julius/julian with version and setting
       names like "julius-3.5-fast" when "make install" is invoked.
     - Updated LICENSE.txt with English translation for reference.

  o  Changed behaviors:
     - Binary N-gram file format has been changed for smaller size.
       The old files can still be read directly by julius, in which
       case on-line conversion will be performed at startup.
       You can convert the old files (3.4.2 and earlier) to the new
       format with the new mkbingram by involing the command below:
	       "mkbingram -d oldbinary newbinary"
       Please note that since mkbingram now output the new format
       file, it can not be read by older Julius.
       The binary N-gram file version can be detected by the first 17
       bytes of the file: old format should be "julius_bingram_v3" and
       new format should be "julius_bingram_v4".
     - Byte order of audio stream via tcpip fixed to LITTLE ENDIAN.
     - Now use built-in zlib by default for compressed files.  This may
       make the engine startup slower, and if you prefer, you can still
       use the previous method using external gzip command by specifying
       "--disable-zlib".
     - (Windows) Changed the compilation procedure on VC++.  You can build
       Julian by only specifying "-DBUILD_JULIAN" at compiler option,
       and do not need to alter "julius.h".


3.4.2 (2004.03.31)
===================
- New option "-rejectshort msec" to reject short input.
- More stable PAUSE/RESUME on module mode with adinnet input.
- Bug fixes:
  - Memory leak on very short input.
  - Missing Nth result when small vocabulary is used.
  - Hang up of "generate" on small grammar.
- Cosmetic changes:
  - Cleanup codes to confirm for 'gcc -Wall'.
  - Update of config.guess and config.sub.
  - Update of copyright to 2004.

3.4.1 (2004.02.25)
===================
- AM and LM computation method is slightly modified to improve search
  stability of 2nd pass.  These modification are enabled by default, and
  MAY IMPROVE THE RECOGNITION ACCURACY as compared with older versions.
  - fixed overcounting of LM score for the expanded word.
  - new inter-word triphone approximation (-iwcd1 best #) on 1st
    pass.  This new algorithm now becomes default.
- Newly supports binary HMM (original format, not compatible with HTK).
  A tool "mkbinhmm" converts a hmmdefs(ascii) file to the binary format.
- MFCC computation becomes faster by sin/cos table lookup.
- Bugs below have been fixed:
  - (-input adinnet) recognition does not start immediately after speech
		     inputs begin when using adinnet client.
  - (-input adinnet) together with module mode, speech input cannot
		     stop by pause/terminate command.
  - (-input adinnet) unneccesary fork when connecting with adinnet client.
  - (-input rawfile) error in reading wave files created by Windows
                     sound recorder.
  - (CMN) CMN was applied any time even when acoustic models does not want.
  - (AM) numerous messages in case of missing triphone errors at startup.
  - (adintool) immediately exit after single file input.
  - (sp-segment) fixed many bugs relating short pause word and LM
  - (sp-segment) wow it works with microphone input.
  - (-[wps]align) memory leak on continuous input.
- Add option to remove DC offset from speech input (option -zmean).
- (-module) new output message:
  '<INPUTPARAM FRAMES="input_frame_length" MSEC="length_in_msec">'
- Optional feature "Search Space Visualization" is added (--enable-visualize)
- HTML documentations greatly revised in doc.

New argument: "-iwcd1 best #" "-zmean"
New configure option: "--disable-lmfix", "--enable-visualize"

3.4   (2003.10.01)
===================
- Confidence measure support
  - New parameter "-cmalpha" as smoothing coef.
  - New command "-outcode C" to output CM in module output
  - Can be disabled by configure option "--disbale-cm"
  - Can use an alternate CM algorithm by configure option "--enable-cm-nbest"
- Class N-gram support
  - Can be disabled by configure option "--disable-class-ngram"
  - Factoring basis changed from N-gram entry to dictionary word
- WAV format recording in "adinrec", "adintool" and "-record" option
- Modified output message
    startup messages,
    engine configuration message in --version and --help,
- Fixes:
    some outputs in module mode,
    bug in only several frame input (realtime-1stpass.c),
    long silence at end of segmented speech
    miscompilation with NetAudio,
    word size check in binary N-gram,
    bug in acoustic computation (gprune_none.c).
    "-version" -> "-setting", "-hipass" -> "-hifreq", "-lopass" -> "-lofreq"

3.3p4 (2003.05.06)
===================
- Fixes for audio input:
  - Fix segfault/hangup with continuous microphone input.
  - Fix client hangup when input speech too long in module mode.
    (now send an buffer overflow message to the client)
  - Fix audio input buffering for very short input (<1000 samples).
  - Fix blocking handling in tcpip adin.
- Some cosmetic changes (jcontrol, LOG_TEN, etc.)

3.3p3 (2003.01.08)
===================
- New inter-word short pause handling:
  - [Julius] New option added for short pause handling.  Specifying
    "-iwspword" adds a short-pause word entry, namely "<UNK> [sp] sp sp",
    to the dictionary.  The entry content to be changed by using "-iwspentry".
  - [multi-path] Supports inter-word context-free short pause handling.
    "-iwsp" option automatically appends a skippable short pause model at
    every word end.  The added model will also be ignored in context
    modeling.  The short pause model to be appended by "-iwsp" can be
    specified by "-spmodel" options.  See documents for details.
- Fixes for audio input:
   - Input delay improved: the initial response to mic input now
     becomes much faster than previous versions (200ms -> 50ms approx.).
   - Would not block when other process is using the audio device, but
     just output error and exit.
   - Update support for libsndfile-1.0.x.
   - Update support for ALSA-0.9.x 
     (to use this, add "--with-mictype=alsa" to configure option.)
 
3.3p2 (2002.11.18)
===================
- [multi-path version] Supports model-skip transition.  From
  this version, you can use "any" type of state transition in HTK
  format acoustic model.
- New feature: "-record dir" records speech inputs sucessively
  into the specified directory with time-stamp file names.
- fix segfault on Solaris with "-input mfcfile".
- fix blocking command input when using module mode and adinnet together.
- modified the output flush timing to make sure the last recognition
  result will be output immediately.

3.3p1 (2002.10.15)
===================
Following bugs are fixed:
- Fixed incorrect default value of language weights for second pass (-lmp2).
- Fixed sometimes read failure of dictionary file (double space enabled).
- Fixed wrong output of "-separatescore" together with monophone model.

3.3 (2002.09.12)
==================
The updates and new features from rev.3.2 is shown below.

- New features added:
        - Server module mode - control Julius (input on/off, grammar switching)
          from other client process via network.
        - Online grammar changing and multi-grammar recognition supported.
- Noise robustness:
        - Spectral subtraction incorporated.
- Support more variety of acoustic models:
        - "multi-path version" is available that allows any transition
           including loop, skip and parallel transition.
- A little improvement of recognition performance by bug fixes
- Other minor extensions (CMN parameter saving, etc.)
- Many bug fixes

English documents are available in
  o online manuals (will be installed by default), and
  o Translated full documentation in PDF format: Julius-3.2-book-e.pdf.
We are sorry that current release contains only documents for old rev.3.2.
We are now working to update it to catch up with the current rev.3.3 version.

