PCM technology-based volume analysis method

Abstract

The invention relates to a PCM technology-based volume analysis method, which comprises the following steps of: S1, inputting a to-be-tested audio signal, and converting the to-be-tested audio signalinto a PCM audio data naked stream to obtain WAV format audio data; S2, analyzing the WAV audio, and acquiring a sampling frequency and a quantization digit of the audio data through utilizing head information; S3, stripping the head information of the WAV audio, and acquiring a byte array according to the remaining byte data; S4, acquiring sound channel information and time information which needto be analyzed currently; S5, utilizing the information obtained in the steps S2, S3 and S4 to calculate to obtain a short array; S6, calculating a mean square error based on the short array, and recording the mean square error as rms; S7, and inputting the rms into a DBSPL formula for conversion, and performing calculation to obtain a volume value. According to the PCM technology-based volume analysis method, the sound pressure level can be better described, the audio volume is described by utilizing the positive volume value obtained through conversion, and better audio analysis and qualityinspection capacity is provided.

Description

technical field [0001] The invention relates to language analysis technology, in particular to a volume analysis method based on PCM technology. Background technique [0002] Audio is an important medium in multimedia. The frequency range of audio signals that we can hear is about 20Hz-2OkHz, in which speech is distributed in about 300Hz-4kHz, while music and other natural sounds are distributed in a full range. The sound is recorded or reproduced by analog equipment to become analog audio, and then digitized to become digital audio. The audio analysis mentioned here is the process of extracting a series of characteristics of the signal in the time domain and frequency domain with digital audio signal as the analysis object and digital signal processing as the analysis method. [0003] Audio analysis of various specific frequency ranges has its own application areas. For example, the analysis of speech signals between 300-4kHz is mainly used in speech recognition, and its...

AI Technical Summary

Problems solved by technology

[0004] However, in the existing audio analysis and quality inspection, there is a lack of volume analysis, which leads to the lack of certain volume information in the voice description of customer service and users, and the impact of speech volume on customer service cannot be well analyzed.

[0005] And there is no good calculation class library for audio volume found in the Java class library. The reference value of the conventional volume calculation method is the full scale level, so the calculated value is mostly used in the description of the computer field, and the obtained value is negative, which cannot be very good. The description of the daily sound pressure level (i.e. positive volume value)

[0006] Negative volume is difficult for users to understand and configure, and cannot form a good product output

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