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

Active Publication Date: 2022-05-27
TIANJIN BEIHAI COMM TECH
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AI Technical Summary

Problems solved by technology

[0003] On the one hand, in order to ensure the clarity of speech in a high-noise environment, the voice announcement system may be set with a relatively high volume, which is not only redundant in a low-noise environment, but may also cause trouble to some passengers;
[0004] On the other hand, the noise in the cabin is too strong in some sections, even if the system uses the maximum volume, it cannot effectively improve the clarity of the broadcast voice

Method used

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  • Voice definition algorithm under noise and train audio playing method and system thereof
  • Voice definition algorithm under noise and train audio playing method and system thereof

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Embodiment Construction

[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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Abstract

The invention discloses a voice definition algorithm under noise and a train audio playing method and system thereof. The method comprises the steps that S101, noise audios collected by sound pickups pre-arranged in all carriages of a train are acquired; receiving an audio stream sent by the vehicle-mounted PIS system, and preprocessing the audio stream; s102, analyzing the noise audio based on the voice definition algorithm under the noise described in the claim 1; s103, adjusting the energy distribution of the voice signal in different frequency bands of the audio stream based on the analysis result of S102, and obtaining the audio stream after energy re-equalization; s104, noise audios are collected by all the carriages respectively, and S102 to 103 are executed correspondingly; and S105, respectively establishing a one-to-one correspondence relationship between each audio stream after re-energy balance and each compartment. The method has the advantages that the voice broadcasting effect in the compartment is improved, and the experience of passengers is improved.

Description

technical field [0001] The present application relates to the technical field of train audio playback, and in particular, to a speech intelligibility algorithm under noise and a train audio playback method and system. Background technique [0002] The subway is accompanied by non-steady-state noise during operation, and the sound pressure level in the carriage generally exhibits a wide range of dynamic changes. The noise will interfere with the voice announcement in the car in two ways: [0003] On the one hand, in order to ensure the clarity of speech in a high-noise environment, the voice announcement system may be set with a relatively high volume, which is not only redundant in a low-noise environment, but may also be troublesome to some passengers; [0004] On the other hand, in some sections, the noise in the compartment is too strong, even if the system adopts the maximum volume, the clarity of the broadcast speech cannot be effectively improved. [0005] In view of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10L21/02
CPCG10L21/02Y02T90/00
Inventor 张有利李跃群
Owner TIANJIN BEIHAI COMM TECH
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