How to implement speech recognition and speech synthesis in C++?

How to implement speech recognition and speech synthesis in C?

Speech recognition and speech synthesis are one of the popular research directions in the field of artificial intelligence today, and they play an important role in many application scenarios. This article will introduce how to use C to implement speech recognition and speech synthesis functions based on Baidu AI open platform, and provide relevant code examples.

1. Speech recognition

Speech recognition is a technology that converts human speech into text. It is widely used in voice assistants, smart homes, autonomous driving and other fields. The following is a sample code for speech recognition using C:

#include <iostream>
#include <string>
#include "bd_asr.h"

int main() {
    std::string api_key = "your_api_key"; // 替换为自己的API Key
    std::string secret_key = "your_secret_key"; // 替换为自己的Secret Key

    // 创建语音识别对象
    bd_asr::ASR asr(api_key, secret_key);

    // 设置识别参数
    asr.setFormat("pcm"); // 输入语音格式为pcm
    asr.setRate(16000); // 采样率为16000Hz

    // 识别语音
    std::string result = asr.recognize("audio.pcm"); // 替换为自己的语音文件路径

    // 输出识别结果
    std::cout << "识别结果：" << result << std::endl;

    return 0;
}

In the above example, we first need to replace api_key and secret_key, which are provided by Baidu AI Open Platform API Key and Secret Key for authentication. Then create an ASR object, set the recognized input speech format and sampling rate, and finally call the recognize method to perform speech recognition and print the results.

2. Speech synthesis

Speech synthesis is a technology that converts text into human voice. It is widely used in speech engines, intelligent customer service, education and other fields. The following is a sample code for speech synthesis using C:

#include <iostream>
#include <string>
#include "bd_tts.h"

int main() {
    std::string api_key = "your_api_key"; // 替换为自己的API Key
    std::string secret_key = "your_secret_key"; // 替换为自己的Secret Key

    // 创建语音合成对象
    bd_tts::TTS tts(api_key, secret_key);

    // 设置合成参数
    tts.setSpeaker(0); // 设置发音人为度小宇
    tts.setSpeed(5); // 设置语速为正常
    tts.setVolume(5); // 设置音量为正常

    // 合成语音
    std::string result = tts.synthesize("你好，欢迎使用百度语音合成！"); // 替换为自己的合成文本

    // 保存合成语音到文件
    tts.save(result, "output.mp3"); // 替换为自己的保存路径

    std::cout << "语音合成完成！" << std::endl;

    return 0;
}

In the above example, we also need to replace api_key and secret_key, and then create a TTS object, set the synthesized speaker, speaking speed and volume, and finally call the synthesize method to perform speech synthesis and save the synthesis result to a file.

Through the above code examples, we can briefly understand how to implement speech recognition and speech synthesis functions in C. Of course, in actual development, we also need to consider some other factors, such as audio stream processing, error handling, etc. I hope this article will be helpful to readers further exploring the world of speech recognition and speech synthesis.

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