add onnx quantize model for onnx; add tester_rtf

lyblsgo

2023-03-21 c8f3af885543aff5018a4897909ade8517d820ca

 funasr/utils/timestamp_tools.py

@@ -1,5 +1,3 @@
from pydoc import TextRepr
from scipy.fftpack import shift
import torch
import copy
import codecs