2013-04-19

1. Data sharing

(1) AM/lexicon/LM are shared.

(2) LM count files are still in transfering. 

2. DNN progress

(1) 400 hour BN model. 

#Tencent baseline:
700 hour online data + 700 863 data , HLDA+MPE; 88k lexicon:

record1900: 8.4
2044:       22.4
online 1:   35.6
online 2:   29.6
map:        24.5
notepad:    16
general:    36
speedup:    26.8

#bMMI
exp/tri4b_mmi_b0.1/decode_tlm_biglm:
map: %WER 27.54 [ 4029 / 14628, 63 ins, 533 del, 3433 sub ]
2044: %WER 24.44 [ 5681 / 23241, 313 ins, 844 del, 4524 sub ]
notetp3: %WER 19.81 [ 367 / 1853, 8 ins, 48 del, 311 sub ]
record1900: %WER 7.65 [ 909 / 11888, 17 ins, 377 del, 515 sub ]
general: %WER 38.52 [ 14490 / 37619, 182 ins, 1314 del, 12994 sub ]
online1: %WER 34.66 [ 9855 / 28433, 398 ins, 1895 del, 7562 sub ]
online2: %WER 27.23 [ 16092 / 59101, 623 ins, 2954 del, 12515 sub ]
speedup: %WER 27.88 [ 1465 / 5255, 32 ins, 332 del, 1101 sub ]

#fMMI
exp/tri4b_fmmi_indirect/decode_tlm_it7_biglm:
map: %WER 27.69 [ 4050 / 14628, 61 ins, 538 del, 3451 sub ]
2044: %WER 24.03 [ 5584 / 23241, 316 ins, 817 del, 4451 sub ]
notetp3: %WER 21.75 [ 403 / 1853, 7 ins, 53 del, 343 sub ]
record1900: %WER 7.35 [ 874 / 11888, 31 ins, 347 del, 496 sub ]
general: %WER 38.90 [ 14635 / 37619, 206 ins, 1331 del, 13098 sub ]
online1: %WER 34.33 [ 9762 / 28433, 424 ins, 1888 del, 7450 sub ]
online2: %WER 26.80 [ 15837 / 59101, 648 ins, 2902 del, 12287 sub ]
speedup: %WER 26.81 [ 1409 / 5255, 35 ins, 284 del, 1090 sub ]

#DNN-bn
exp/tri4d_fmmi_indirect/decode_tlm_it4_biglm:
map: %WER 23.79 [ 3480 / 14628, 58 ins, 465 del, 2957 sub ]
2044: %WER 21.77 [ 5060 / 23241, 297 ins, 711 del, 4052 sub ]
notetp3: %WER 15.81 [ 293 / 1853, 8 ins, 35 del, 250 sub ]
record1900: %WER 6.57 [ 781 / 11888, 18 ins, 325 del, 438 sub ]
general: %WER 33.61 [ 12645 / 37619, 191 ins, 968 del, 11486 sub ]
online1: %WER 31.44 [ 8940 / 28433, 311 ins, 1619 del, 7010 sub ]
online2: %WER 24.10 [ 14245 / 59101, 523 ins, 2417 del, 11305 sub ]
speedup: %WER 22.82 [ 1199 / 5255, 39 ins, 241 del, 919 sub ]

(2) Tencent test result: 70h training data(2 day, 15 machines, 10 threads), 

88k LM, general test case:

  gmmi-bmmi: 38.7%
  dnn-1: 28%  11 frame window,  phone-based tree 
  dnn-2: 34%  9  frame window,  state-based tree
  

(3) GPU & CPU merge. Invesigate the possibility to merge GPU and CPU code. Try to find out an easier way. (1 week)

(4) L-1 sparse initial training. 

3.Kaldi/HTK merge

(1) HTK2Kaldi: the tool with Kaldi does not work.
(2) Kaldi2HTK: done with implementation. Testing?

4. Embedded progress

(1). Some large performance (speed) degradation with the embedded platform(1/60).
(2). Planning for sparse DNN.
(3). QA LM training, still failed. Mengyuan need more work on this.