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

Question

我目前正在用 C# 开发一个实现文本转语音的小程序。但是，我发现可以使用两个命名空间：

System.Speech.Synthesis
Microsoft.Speech.Synthesis

我用谷歌搜索了不同之处，发现 this post 是关于语音识别的。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);
    }
  }
}

谁能给我解释一下他们两者之间的区别？

Answer 1

差异确实与链接答案中概述的差不多； 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，差异很大；服务器 TTS 引擎是单独许可的。

但是，System.Speech.SpeechSynthesis和Microsoft.Speech.SpeechSynthesis都被弃用了API，新的开发应该基于Windows.Media.SpeechSynthesisAPI.

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

What is the difference between System.Speech.Synthesis and Microsoft.Speech.Synthesis?

c#

text-to-speech

speech-synthesis

microsoft-speech-api

microsoft-speech-platform