语音识别的方法有哪些？

import { BusinessError } from '@kit.BasicServicesKit';
let asrEngine: speechRecognizer.SpeechRecognitionEngine;
let requestId: string = '123456';
// 创建引擎，通过callback形式返回
// 设置创建引擎参数
let extraParam: Record<string, Object> = {"locate": "CN", "recognizerMode": "short"};
let initParamsInfo: speechRecognizer.CreateEngineParams = {
  language: 'zh-CN',
  online: 1,
  extraParams: extraParam
}
// 调用createEngine方法
speechRecognizer.createEngine(initParamsInfo, (err: BusinessError, speechRecognitionEngine: speechRecognizer.SpeechRecognitionEngine) => {
  if (!err) {
    console.info('createEngine is success');
    //接收创建引擎的实例
    asrEngine = speechRecognitionEngine;
  } else {
    //无法创建引擎时返回错误码1002200008，原因：引擎正在销毁中
    console.error("errCode: " + err.code +  " errMessage: " + JSON.stringify(err.message));
  }
});

// 创建回调对象
let setListener: speechRecognizer.RecognitionListener = {
  // 开始识别成功回调
  onStart(sessionId: string, eventMessage: string) {
    console.info("onStart sessionId: " + sessionId + "eventMessage: " + eventMessage);
  },
  // 事件回调
  onEvent(sessionId: string, eventCode: number, eventMessage: string) {
    console.info("onEvent sessionId: " + sessionId + "eventCode: " + eventCode + "eventMessage: " + eventMessage);
  },
  // 识别结果回调，包括中间结果和最终结果
  onResult(sessionId: string, result: speechRecognizer.SpeechRecognitionResult) {
    console.info("onResult sessionId: " + sessionId + "sessionId: " + JSON.stringify(result));
  },
  // 识别完成回调
  onComplete(sessionId: string, eventMessage: string) {
    console.info("onComplete sessionId: " + sessionId + "eventMessage: " + eventMessage);
  },
  // 错误回调，错误码通过本方法返回
  // 返回错误码1002200002，开始识别失败，重复启动startListening方法时触发
  // 更多错误码请参考错误码参考
  onError(sessionId: string, errorCode: number, errorMessage: string) {
    console.error("onError sessionId: " + sessionId + "errorCode: " + errorCode + "errorMessage: " + errorMessage);
  }
}
// 设置回调
asrEngine.setListener(setListener);
let audioParam: speechRecognizer.AudioInfo = {audioType: 'pcm', sampleRate: 16000, soundChannel: 1, sampleBit: 16};
let extraParam: Record<string, Object> = {"vadBegin": 2000, "vadEnd": 3000, "maxAudioDuration": 40000};
let recognizerParams: speechRecognizer.StartParams = {
  sessionId: requestId,
  audioInfo: audioParam,
  extraParams: extraParam
}
// 调用开始识别方法
asrEngine.startListening(recognizerParams);
let unit8Array: Uint8Array = new Uint8Array();
// 可以通过如下方式获取音频流：1、通过录音获取音频流；2、从音频文件中读取音频流
//2、从音频文件中读取音频流:demo参考
// 写入音频流，音频流长度仅支持640字节或1280字节asrEngine.writeAudio(requestId, unit8Array);
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