add readme, generate protobuf file

huangmingming

2023-01-29 5e5a88bc65ef8a1996ffe22c34e0569f61ae5ef3

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beam_size: 10
penalty: 0.0
maxlenratio: 0.0
minlenratio: 0.0
ctc_weight: 1.0
lm_weight: 0.7