一、文字转语音API介绍
近年来,随着人工智能技术的飞速发展,文字转语音技术也日渐成熟。目前市面上已经出现了许多文字转语音的API,其中最为知名的当属百度AI开放平台、阿里云智能语音等。这些API功能强大、使用方便,且还支持多种语言转换,可以满足各种场景的需求。
二、Java实现API调用
Java作为一种广泛应用于企业开发的编程语言,自然也支持文字转语音API的调用。以百度AI开放平台为例,需要先在官网进行注册、申请API密钥等操作,然后通过Java代码调用接口进行文字转语音。下面是示例代码:
public class BaiduAiService{ public static void main(String[] args) { String API_KEY = "your_api_key"; String SECRET_KEY = "your_secret_key"; // 初始化一个AipSpeech AipSpeech client = new AipSpeech(API_KEY, SECRET_KEY); // 调用接口转换文字为语音 TtsResponse res = client.synthesis("百度AI开放平台,让AI变得简单", "zh", 1, null); // 将语音转换成文件保存 FileOutputStream fos = new FileOutputStream(new File("out.mp3")); byte[] bytes = res.getData(); fos.write(bytes, 0, bytes.length); fos.flush(); fos.close(); } }
三、Java实现本地语音合成
除了调用文字转语音API外,Java还可以使用本地语音合成技术,也就是使用Java自带的javax.speech包进行文字合成。该包是Java Speech API的一部分,旨在提供一种用于语音合成及识别的Java标准。下面是示例代码:
import javax.sound.sampled.AudioFileFormat; import javax.sound.sampled.AudioInputStream; import javax.sound.sampled.AudioSystem; import javax.sound.sampled.Clip; import javax.sound.sampled.DataLine; import javax.sound.sampled.Mixer; import javax.sound.sampled.Port; import javax.sound.sampled.SourceDataLine; import javax.sound.sampled.TargetDataLine; import javax.sound.sampled.AudioFormat.Encoding; import javax.speech.AudioException; import javax.speech.Central; import javax.speech.EngineList; import javax.speech.EngineModeDesc; import javax.speech.synthesis.SpeechEvent; import javax.speech.synthesis.SpeechEventAdapter; import javax.speech.synthesis.Synthesizer; import javax.speech.synthesis.SynthesizerModeDesc; public class TTS { private Synthesizer synthesizer; public void setText(String text) { try { // 获取SynthesizerModeDesc描述类 SynthesizerModeDesc desc = new SynthesizerModeDesc(null, "general", Locale.US, null, null); // 根据描述类创建Synthesizer对象 synthesizer = Central.createSynthesizer(desc); // 打开Synthesizer synthesizer.allocate(); synthesizer.resume(); // 添加监听器 synthesizer.addEngineListener(new CustomSynthesizerListener()); // 将文本输入Synthesizer,并设置语音合成的音量、语速、音调等参数 synthesizer.speak(text, null); synthesizer.waitEngineState(Synthesizer.QUEUE_EMPTY); } catch (Exception e) { e.printStackTrace(); } finally { if (synthesizer != null) synthesizer.deallocate(); } } /** * 监听器 */ private class CustomSynthesizerListener extends SpeechEventAdapter { @Override public void processUnknown(SpeechEvent e) { System.out.println("唤醒:" + e.getSource() + " " + e.getId() + " " + e.getText()); } } public static void main(String[] args) { TTS tts = new TTS(); tts.setText("Java语音合成工具,方便易用,支持多种参数设置"); } }
四、Java实现语音转文字
除了文字转语音,Java也支持语音转文字功能。相比文字转语音,语音转文字需要更多的算法处理。目前市面上也有很多成熟的语音转文字API,如讯飞开放平台、腾讯AI开放平台等。下面是使用讯飞开放平台API进行语音转文字的示例代码:
public class XunfeiDemo { private static final String URL = "http://api.xfyun.cn/v1/service/v1/iat"; private static final String APP_ID = "your_app_id"; private static final String API_KEY = "your_api_key"; private static final String API_SECRET = "your_api_secret"; // 音频编码 private static final String AUE = "raw"; // 结果格式 private static final String RESULT_FORMAT = "json"; public static void main(String[] args) throws Exception { File file = new File("test.pcm"); FileInputStream fis = new FileInputStream(file); byte[] bytes = new byte[fis.available()]; fis.read(bytes); fis.close(); String audioBase64 = new BASE64Encoder().encode(bytes); String curTime = System.currentTimeMillis() / 1000L + ""; String param = "{\"auf\":\"audio/L16;rate=16000\",\"aue\":\"" + AUE + "\",\"voice_name\":\"xiaoyan\",\"engine_type\":\"sms16k\",\"result_format\":\"" + RESULT_FORMAT + "\",\"grammar_list\":\"\",\"extend_params\":\"language=cn|accent=mun\",\"sub\":\"iat\",\"index\":0,\"language\":\"zh_cn\"}"; String paramBase64 = new BASE64Encoder().encode(param.getBytes("UTF-8")); // 计算请求签名 String checkSum = DigestUtils.md5Hex(API_KEY + curTime + paramBase64).toLowerCase(); CloseableHttpClient httpClient = HttpClients.createDefault(); HttpPost httpPost = new HttpPost(URL); httpPost.setHeader("Content-Type", "application/x-www-form-urlencoded; charset=utf-8"); httpPost.setHeader("X-CurTime", curTime); httpPost.setHeader("X-Param", paramBase64); httpPost.setHeader("X-Appid", APP_ID); httpPost.setHeader("X-CheckSum", checkSum); httpPost.setHeader("X-UserAgent", "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:84.0) Gecko/20100101 Firefox/84.0"); StringEntity reqEntity = new StringEntity("audio=" + URLEncoder.encode(audioBase64, "UTF-8"), "UTF-8"); httpPost.setEntity(reqEntity); CloseableHttpResponse httpResponse = httpClient.execute(httpPost); String result = EntityUtils.toString(httpResponse.getEntity(), "UTF-8"); JSONObject jsonObject = JSONObject.parseObject(result); JSONArray jsonArray = jsonObject.getJSONObject("data").getJSONArray("result"); StringBuilder stringBuilder = new StringBuilder(); for (Object obj : jsonArray) { stringBuilder.append(obj.toString()); } System.out.println(stringBuilder.toString()); } }