我正在使用c#和System.Speech.Recognition来加载我定义的几个简单语法。当我说出与语法匹配的短语时,引擎会正确识别语法,信心大约为0.95。
但是当我发出甚至不在语法中的单词时(即使是来自差异语言或乱码),引擎会随机地将匹配返回到语法,其中随机文本从未发音,仍然具有0.92的高可信度。
我是否需要在SpeechRecognitionEngine对象或每个语法对象中设置以避免此问题?
答案 0 :(得分:2)
我认为我找到了一个适合我的解决方案,但如果存在,找到更优雅的解决方案仍然会很好:
我定义了一个听写语法和一个"占位符"。然后我加载我的语法并立即禁用它们。
using System.Speech.Recognition;
...
private DictationGrammar dictationGrammar;
private Grammar placeholderGrammar;
private List<Grammar> commands;
public void Initialize()
{
dictationGrammar = new DictationGrammar();
recognizer.LoadGrammarAsync(dictationGrammar);
var builder = new GrammarBuilder();
builder.Append("MYPLACEHOLDER");
placeholderGrammar = new Grammar(builder);
recognizer.LoadGrammarAsync(placeholderGrammar);
commands = new List<Grammar>();
foreach (var grammar in grammarManager.GetGrammars())
{
commands.Add(grammar);
grammar.Enabled = false;
recognizer.LoadGrammarAsync(grammar);
}
}
然后在speechRecognized事件中,我提出了如果识别占位符则启用命令的逻辑。如果识别出命令,则重新启用听写并禁用所有命令:
private async void speechRecognized(object sender, SpeechRecognizedEventArgs e)
{
if (e.Result.Grammar == placeholderGrammar)
{
//go to command mode
placeholderGrammar.Enabled = false;
dictationGrammar.Enabled = false;
foreach (var item in commands)
item.Enabled = true;
}
else if (commands.Any(x => e.Result.Grammar == x))
{
Do_something_with_recognized_command("!!");
//go back in normal mode
placeholderGrammar.Enabled = true;
dictationGrammar.Enabled = true;
}else {//this is dictation.. nothing to do}
}