Pocketsphinx in python returns random words in keyword search

Question

I copied a code from a website to listen to specific words in python using pocketsphinx.It although runs but never outputs the keyword as expected.This is my code:

import sys, os
from pocketsphinx.pocketsphinx import *
from sphinxbase.sphinxbase import *
import pyaudio

# modeldir = "../../../model"
# datadir = "../../../test/data"

modeldir="C://Users//hp//AppData//Local//Programs//Python//Python35//Lib//site-packages//pocketsphinx//model//en-us"
dictdir="C://Users//hp//AppData//Local//Programs//Python//Python35//Lib//site-packages//pocketsphinx//model//cmudict-en-us.dict"
lmdir="C://Users//hp//AppData//Local//Programs//Python//Python35//Lib//site-packages//pocketsphinx//model//en-us.lm.bin"
# Create a decoder with certain model
config = Decoder.default_config()
config.set_string('-hmm', modeldir)
config.set_string('-lm', lmdir )
config.set_string('-dict', dictdir)
config.set_string('-keyphrase', 'forward')
config.set_float('-kws_threshold', 1e+20)

p = pyaudio.PyAudio()
stream = p.open(format=pyaudio.paInt16, channels=1, rate=16000, input=True, frames_per_buffer=1024)
stream.start_stream()

# Process audio chunk by chunk. On keyword detected perform action and restart search
decoder = Decoder(config)
decoder.start_utt()
while True:
    buf = stream.read(1024)
    if buf:
         decoder.process_raw(buf, False, False)
    else:
         break
    if decoder.hyp() != None:
      #print(decoder.hyp().hypstr)
      if decoder.hyp().hypstr == 'forward':
        print ([(seg.word, seg.prob, seg.start_frame, seg.end_frame) for seg in decoder.seg()])
        print ("Detected keyword, restarting search")
        decoder.end_utt()
        decoder.start_utt()

Also when I use print(decoder.hyp().hypstr)

It just outputs random words when i speak anything.For ex if i speak a word or line it outputs:

the
the
the
the
the
the
the
the
the
the
the
the
the
the
the
the
the
the
the
the
the
the
the
the
the
the
the
the
the
the
the
the
the da
the head
the bed
the bedding
the heading of
the bedding and
the bedding and
the bedding and
the bedding and
the bedding and
the bedding and
the bedding and
the bedding and
the bedding and
the bedding and
the bedding and
the bedding and
the bedding and well
the bedding and well
the bedding and well
the bedding and butler
the bedding and what lingus
the bedding and what lingus
the bedding and what lingus
the bedding and what lingus ha
the bedding and blessed are
the bedding and blessed are
the bedding and what lingus on
the bedding and what lingus want
the bedding and what lingus want
the bedding and what lingus want
the bedding and what lingus want
the bedding and what lingus want or
the bedding and what lingus want to talk
the bedding and what lingus current top
the bedding and what lingus want to talk
the bedding and what lingus want to talk
the bedding and what lingus want to talk
the bedding and what lingus want to talk
the bedding and what lingus want to talk to her
the bedding and what lingus want to talk to her
the bedding and what lingus want to talk to her
the bedding and what lingus want to talk to her

Please help me through it.I am just a newbie in python.

Answer 1

You need to remove this line

  config.set_string('-lm', lmdir )

Keyphrase search and lm search are mutually exclusive.