Voice definition algorithm under noise and train audio playing method and system thereof
A technology for audio playback and clarity, applied in speech analysis, instruments, sustainable transportation, etc., can solve the problems of passenger troubles, cannot effectively improve the clarity of broadcast voice, redundancy, etc., to avoid high sound pressure level troubles, improve Announce the effect of speech intelligibility
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[0039] Attached to the following Figure 1-2 This application will be described in further detail.
[0040] The embodiment of the present application discloses a speech intelligibility algorithm under noise, which includes:
[0041] Establishing the impact of ambient noise on speech intelligibility The relational formula of influence: ; where subscript means the first frequency bands, is the weight coefficient of different frequency bands, Represents the degree of speech distortion, and K represents the masking effect of ambient noise on speech.
[0042] make, ;in, is the speech signal energy in the frequency band, is the standard value of normal speech energy.
[0043] make, ;in, is the equivalent noise power after considering the masking effect of ambient noise on speech.
[0044] At this point, D satisfies the formula:
[0045] ;
[0046] of which Also: ;
[0047] above, subscript means the first frequency bands, and define: , Both a...
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