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本文最早发表于电子发烧友论坛：【新提醒】【正点原子i.MX93开发板试用连载体验】基于深度学习的语音本地控制 - 正点原子学习小组 - 电子技术论坛 - 广受欢迎的专业电子论坛! (elecfans.com)
接下来就是要尝试训练中文提示词。首先要进行语料采集，这是一个比较耗费人力的事情，通常大公司会有有专人进行语料收集，我只好自己亲自做。这里参考了AliOS Things里面提供的一个录音工具，方便快速录音。对这个工具做了一点修改，原来的代码只能在Linux下运行，现在改成在Windows下也能运行。
import pyaudio
import wave
import random
import time
import os
from IPython import display
#from pydub import AudioSebment
#from pydub.playback import play
#from playsound import playsound
CHUNK = 2
FORMAT = pyaudio.paInt16
CHANNELS = 1
RATE = 16000
SAMPLEWIDTH = 2
RECORD_SECONDS = 1
FILE_FORMAT = '.wav'
RECODER_NAME = 'lk'
#play stream
def play_wav(name, pyaudio):f = wave.open(name,"rb") #open stream play_stream = pyaudio.open(format = p.get_format_from_width(f.getsampwidth()), channels = f.getnchannels(), rate = f.getframerate(), output = True) #read data data = f.readframes(CHUNK)while data: play_stream.write(data)data = f.readframes(CHUNK)#stop streamplay_stream.stop_stream() play_stream.close() #close PyAudio
# pyaudio.terminate()f.close()
def save_wav(name, frames):wf = wave.open(name, 'wb')wf.setnchannels(CHANNELS)wf.setsampwidth(p.get_sample_size(FORMAT))wf.setframerate(RATE)wf.writeframes(b''.join(frames))wf.close()
def record_wav(duration):time.sleep(0.2) # 1sec, 0.1secprint("开始录音,请说话......")
# count = 3
# for i in range(3):
# time.sleep(0.2) # 1sec, 0.1sec
# count -= 1
# print(count)frames = []stream = p.open(format=FORMAT,channels=CHANNELS,rate=RATE,input=True,frames_per_buffer=CHUNK)for i in range(0, int(RATE * duration / SAMPLEWIDTH)):data = stream.read(CHUNK, exception_on_overflow = False)frames.append(data)#count = 0#while count < int(RECORD_SECONDS * RATE):# data = stream.read(CHUNK)# frames.append(data)# count += CHUNKstream.stop_stream()stream.close()print("录音结束!")return frames
# main function
if __name__ == '__main__':p = pyaudio.PyAudio()# input('请按回车键开始录制！\n')# record filescount = 0for i in range(250):input('请按回车键开始录制！\n')print("开始第%d录制！" % count)hash_name = str(hex(abs(hash(RECODER_NAME + str(random.random()))) % 1000000000)).replace('0x','') \+ '_nohash_' + str(count) + FILE_FORMATrframes = record_wav(1) # record 1 secsave_wav(hash_name, rframes)#time.sleep(0.5) # 1sec, 0.1secprint("录音回放开始！\n")play_wav(hash_name, p)print("录音回放结束！\n")value = input("按‘回车’保存，放弃本条请按‘其他’键并回车!\n")if (value == ''):count += 1print("保存录音成功！")else:os.remove(hash_name)print("已删除本条录音！")#display.display(display.Audio(hash_name, rate=16000))#wav = AudioSegment.from_wav(hash_name)#play(wav)p.terminate()