System.Speech.Synthesis 和 Microsoft.Speech.Synthesis 有什么区别

Question

我目前正在用C#开发一个小程序来实现文本到语音转换。但是，我发现可以使用两个命名空间：

• 系统.语音.合成
• Microsoft.演讲.综合

我在谷歌上搜索了差异，发现了这篇关于语音识别的文章。它并没有真正回答我的问题。我也在他们两个之间切换，没有区别。它适用于代码中的所有语言(如下(。

using System;
using System.Speech.Synthesis;
//using Microsoft.Speech.Synthesis;
namespace TTS_TEST
{
class Program
{
    static void Main(string[] args)
    {
          SpeechSynthesizer synth = new SpeechSynthesizer();
          int num;
          string userChoice;
          do
          {
             Console.WriteLine("1 - " + "Microsoft Server Speech Text to Speech Voice (en-US, ZiraPro)");
             Console.WriteLine("2 - " + "Microsoft Server Speech Text to Speech Voice (en-GB, Hazel)");
             Console.WriteLine("3 - " + "Microsoft Server Speech Text to Speech Voice (es-ES, Helena)");
             Console.WriteLine("4 - " + "Microsoft Server Speech Text to Speech Voice (fr-FR, Hortense)");
             Console.WriteLine("5 - " + "Exit");
             Console.Write("Enter the number of your choice: ");     //the user chooses a number
             userChoice = Console.ReadLine();
             if (!Int32.TryParse(userChoice, out num)) continue;
             Console.WriteLine("Choice = " + userChoice);
             if (userChoice == "1")    //Option 1 will use the voice en-US, ZiraPro
             {
                synth.SelectVoice("Microsoft Server Speech Text to Speech Voice (en-US, ZiraPro)");
             }
             if (userChoice == "2")   //Option 2 will use the voice en-GB, Hazel
             {
                synth.SelectVoice("Microsoft Server Speech Text to Speech Voice (en-GB, Hazel)");
             }
             if (userChoice == "3")   //Option 3 will use the voice es-ES, Helena
             {
                synth.SelectVoice("Microsoft Server Speech Text to Speech Voice (es-ES, Helena)");
             }
             if (userChoice == "4")   //Option 4 will use the voice fr-FR, Hortense
             {
                synth.SelectVoice("Microsoft Server Speech Text to Speech Voice (fr-FR, Hortense)");
             }
             if (userChoice == "5")   //Option 5 will exit application
             {
                Environment.Exit(0);
             }
             synth.SetOutputToDefaultAudioDevice();   //set the default audio output
             foreach (InstalledVoice voice in synth.GetInstalledVoices())   //list the installed voices details
             {
                VoiceInfo info = voice.VoiceInfo;
                Console.WriteLine(" Name:          " + info.Name);
                synth.Speak("Name: " + info.Name);
                Console.WriteLine(" Culture:       " + info.Culture);
                synth.Speak("Culture: " + info.Culture);
                Console.WriteLine(" Age:           " + info.Age);
                synth.Speak("Age: " + info.Age);
                Console.WriteLine(" Gender:        " + info.Gender);
                synth.Speak("Gender: " + info.Gender);
                Console.WriteLine(" Description:   " + info.Description);
                Console.WriteLine(" ID:            " + info.Id + "n");
                synth.Speak("ID: " + info.Id);
             }
             Console.ReadKey();
          }
          while (true);
    }
  }
}

有人可以解释一下他们两个之间的区别吗？

Answer 1

差异实际上与链接答案中概述的几乎相同; System.Speech.SpeechSynthesis使用桌面 TTS 引擎，而Microsoft.Speech.SpeechSynthesis使用服务器 TTS 引擎。 从编程的角度来看，差异相对较小，但从许可的角度来看却有很大不同;服务器 TTS 引擎单独获得许可。

但是，System.Speech.SpeechSynthesis 和 Microsoft.Speech.SpeechSynthesis 都是已弃用的 API，新的开发应基于 Windows.Media.SpeechSynthesis API。