ROS Programming: Building Powerful Robots

The AIML speech recognition node

The speech recognition node subscribes to /recognizer/output and publishes to the /chatter topic:

    #!/usr/bin/env python 
    import rospy 
    from std_msgs.msg import String 
    rospy.init_node('aiml_speech_recog_client') 
    pub = rospy.Publisher('chatter', String,queue_size=10) 
    r = rospy.Rate(1) # 10hz 
 
    def get_speech(data): 
      speech_text=data.data 
      rospy.loginfo("I said:: %s",speech_text) 
      pub.publish(speech_text) 
 
    def listener(): 
      rospy.loginfo("Starting Speech Recognition") 
      rospy.Subscriber("/recognizer/output", String, get_speech) 
      rospy.spin() 
 
    while not rospy.is_shutdown(): 
      listener() 

The /recognizer/output topic is published by ROS speech recognition packages such as Pocket Sphinx (http://wiki.ros.org/pocketsphinx).

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