看，不用键盘！使用固定文法的语音输入和响应

COMPUTER WAKE
COMPUTER STATUS
COMPUTER SLEEP

$major =  COMPUTER ;
$minor = WAKE | STATUS | SLEEP ;
( SENT-START ( $major $minor ) SENT-END )

S : NS_B SENT NS_E
SENT: MAJOR MINOR
MAJOR: COMPUTER
MINOR: WAKE STATUS SLEEP

<?php
...
function dm($prompt_heard) {
global $wake_state; // FALSE is asleep so do not respond, TRUE is awake
  $parts = explode(" ",$prompt_heard);
  $minor = $parts[1];
  switch ($minor) {
    case 'WAKE':
      $wake_state = TRUE ;
    break;
    case 'SLEEP':
      $wake_state = FALSE ;
    break;
    case 'STATUS':
      if ($wake_state) {
        announce_status();
      } else {
        // do nothing
      }
    break;
    default:
      // OOV - any other prompt, just ignore it.
    break;
  }
}
?>

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE grammar PUBLIC "-//W3C//DTD GRAMMAR 1.0//EN"
                  "http://www.w3.org/TR/speech-grammar/grammar.dtd">
<grammar xmlns="http://www.w3.org/2001/06/grammar" xml:lang="en"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
         xsi:schemaLocation="http://www.w3.org/2001/06/grammar 
                             http://www.w3.org/TR/speech-grammar/grammar.xsd"
         version="1.0" 
         mode="voice" 
         root="myroot">
<meta name="author" content="Colin Beckingham"/>
<rule id="myroot" scope="public">
  <example> COMPUTER WAKE </example>
  <example> COMPUTER SLEEP </example>
  <example> COMPUTER STATUS </example>
  <ruleref uri="#command1"/>
  <!-- ruleref uri="#command2"/ -->
</rule>
<rule id="command1">
  <ruleref uri="#major"/> <ruleref uri="#minor"/>
</rule>
<rule id="major">
   <one-of>
      <item> COMPUTER </item>
    </one-of>
</rule>
<rule id="minor">
    <one-of>
      <item> WAKE </item>
      <item> SLEEP </item>
      <item> STATUS </item>
    </one-of>
</rule>
</grammar>

<?php
// test translator: SRGS to HTK/Julius
$xml = simplexml_load_file("mysrgs.xml");
$roote = trim($xml['root']);
// find the root rule, get the basic rulerefs
foreach ($xml->rule as $rule) { 
  if ($rule['id'] == $roote) { 
    foreach ($rule->ruleref as $rref) {
      $rulerefs[] = substr($rref['uri'],1);
} } }
// find the rules indicated by the rulerefs
foreach ($rulerefs as $ruleid) {
  foreach ($xml->rule as $rule) {
    if ($rule['id'] == $ruleid) {
      $i = 0;
      foreach ($rule->ruleref as $rref) {
        $myrules[$ruleid][$i] = substr($rref['uri'],1);
        $i++;
} } } }
// load the words array
foreach ($myrules as $mr=>$myr) {
  foreach ($myr as $md=>$myd) {
    foreach ($xml->rule as $rule) {
      if ($rule['id'] == $myd) {
        foreach ($rule->{'one-of'}->item as $item) {
          $words[$mr][$md][] = $item;
} } } } }
// now the output
$varnamestr .= "";
$jvarnamestr = "";
foreach ($words as $k=>$v) { // master
  $jvarnamestr .= "\nSENT: ";
  foreach ($v as $kk=>$vv) { // sub
    $i = 0;
    foreach ($vv as $wd) { // word
      $j = count($vv);
      $htkwds[$k][$kk] .= " $wd ";
      $i++;
      $jwds[$k][$kk] .= " $wd ";
      if ($i < $j) $htkwds[$k][$kk] .= "|";
    }
    // htk
    $varname = "$".$k."_".$kk."";
    $htkv .= "$varname = ".$htkwds[$k][$kk].";\n";
    $varnamestr .= " ".$varname;
    // julius
    $jvarname = strtoupper($k."_".$kk);
    $jvarwordstr .= "$jvarname: ".$jwds[$k][$kk]."\n";
    $jvarnamestr .= " ".$jvarname." ";
  }
  $varnamestr = $varnamestr." |";
}
// output as HTK
echo "\n-------------------------\n";
echo "HTK Version\n-------------------------\n";
$varnamestr = substr($varnamestr,0,-2);
$htk = $htkv."( SENT-START (".$varnamestr." ) SENT-END )";
echo "$htk\n-------------------------\n";
// output as Julius
echo "Julius Version\n-------------------------\n";
$julius = "S : NS_B SENT NS_E";
$julius .= "$jvarnamestr\n";
$julius .= "$jvarwordstr";
echo "$julius-------------------------\n";
// end
echo "Done\n\n";
?>

> php mytrans.php

-------------------------
HTK Version
-------------------------
$command_0 =  COMPUTER ;
$command_1 =  WAKE | SLEEP | STATUS ;
$zoo_0 =  ANIMALS ;
$zoo_1 =  TIGER | LION | LEOPARD ;
( SENT-START ( $command_0 $command_1 | $zoo_0 $zoo_1 ) SENT-END )
-------------------------
Julius Version
-------------------------
S : NS_B SENT NS_E
SENT:  COMMAND_0  COMMAND_1
SENT:  ZOO_0  ZOO_1
COMMAND_0:  COMPUTER
COMMAND_1:  WAKE  SLEEP  STATUS
ZOO_0:  ANIMALS
ZOO_1:  TIGER  LION  LEOPARD
-------------------------
Done

...
<item weight="1"> COMPUTER <tag>$context = "tech";</tag></item>
...
<item weight=""> WAKE <tag>$wake_state = TRUE;</tag></item>
<item weight=""> SLEEP <tag>$wake_state = FALSE;</tag></item>
<item weight=""> STATUS <tag>
      if ($wake_state) {
        announce_status();
      }</tag></item>
...      
<item weight="0"> ANIMALS <tag></tag></item>
...

<?php
// Dialog manager generator
// Colin Beckingham, 2010
// test dmgen
$xml = simplexml_load_file("mysrgs.xml");
$roote = trim($xml['root']);
// find the root rule, get the basic rulerefs
foreach ($xml->rule as $rule) { 
  if ($rule['id'] == $roote) { 
    foreach ($rule->ruleref as $rref) {
      $rulerefs[] = substr($rref['uri'],1);
} } }
// find the rules indicated by the rulerefs
foreach ($rulerefs as $ruleid) {
  foreach ($xml->rule as $rule) {
    if ($rule['id'] == $ruleid) {
      $i = 0;
      foreach ($rule->ruleref as $rref) {
        $myrules[$ruleid][$i] = substr($rref['uri'],1);
        $i++;
} } } }
// load the words array
foreach ($myrules as $mr=>$myr) {
  foreach ($myr as $md=>$myd) {
    foreach ($xml->rule as $rule) {
      if ($rule['id'] == $myd) {
        foreach ($rule->{'one-of'}->item as $item) {
          $words[$mr][$md][] = $item;
} } } } }
$dmout1 = "<?php
...
function dm(\$prompt_heard) {
global \$wake_state; // FALSE is asleep so do not respond, TRUE is awake
  \$parts = explode(\" \",\$prompt_heard);
  \$major = \$parts[0];
  \$minor = \$parts[1];
  switch (\$major) {";
    foreach ($words as $mw) {
      $mww = $mw[0][0]->attributes();
      if ($mww->weight == 1) {
$maj = "    case '".trim($mw[0][0])."':\n      ";
$maj .= "".$mw[0][0]->tag."";
$min1 = "\n      switch (\$minor) {";
        $ins .= "\n$maj$min1";
        foreach ($mw[1] as $mm) {
$min2 = "\n        case '".trim($mm)."':\n";
$min3 = "        ".$mm->tag."\n";
$min4 = "        break;";
        $ins .= "$min2$min3$min4";
      }
$min5 = "\n        case default:\n        break;\n      }";
        $ins .= $min5;
      }
    }
$dmout2= "
    default:
      // OOV - any other prompt, just ignore it.
    break;
  }
}
?>
";
echo "$dmout1$ins$dmout2\n";
?>

> php dmgen2.php

<?php                                                          
...                                                            
function dm($prompt_heard) {                                   
global $wake_state; // FALSE is asleep so do not respond, TRUE is awake
  $parts = explode(" ",$prompt_heard);                                 
  $major = $parts[0];                                                  
  $minor = $parts[1];                                                  
  switch ($major) {                                                    
    case 'COMPUTER':                                                   
      $context = "tech";                                               
      switch ($minor) {                                                
        case 'WAKE':                                                   
          $wake_state = TRUE;
        break;
        case 'SLEEP':
          $wake_state = FALSE;
        break;
        case 'STATUS':
          if ($wake_state) { announce_status(); }
        break;
        case default:
        break;
      }
    case 'APPLES':
      $context = "fruit";
      switch ($minor) {
        case 'PIPPIN':
          pippin apple
        break;
        case 'DELICIOUS':
          delicious apple
        break;
        case 'SPARTAN':
          spartan apple
        break;
        case default:
        break;
      }
    default:
      // OOV - any other prompt, just ignore it.
    break;
  }
}
?>