Method for monitoring digital audio signal volume

Abstract

The invention provides a method for monitoring digital audio signal volume. The method is achieved by combined action of hardware and programs. A digital audio signal volume monitoring card which comprises a digital audio acquisition unit, a decoding unit, a volume computing unit and a communication unit is adopted for the hardware. A computer accesses the volume monitoring card through the programs, and under the condition of not affecting other producing and playing normal operation, the volume of input audio signals and the dynamic range of the volume are recorded, displayed, stored and analyzed; the digital audio volume monitoring card acquires the digital audio signals and computes the corresponding volume of the audio signals; the digital audio acquisition unit is provided with three sets of input interfaces, and each set of the interface is provided with three input interface circuits suitable for digital audios with AES / EBU signals or S / PDIF signals, the input interface circuits are used for receiving the AES / EBU signals or the S / PDIF signals input in a balanced mode and imbalanced mode respectively; the volume computing unit computes the volume data result.

Description

technical field [0001] The present invention is a method for monitoring the loudness of digital audio signals. The digital audio signal loudness monitoring card with built-in audio signal loudness filtering and weighting operation collects multiple audio signals, and uses algorithmic software to calculate the loudness and dynamic range of the audio signals. The signal loudness status is recorded, displayed, stored and analyzed. By monitoring the recording, production, transmission and playback of program audio signals, the production and playback quality of audio programs can be improved. The monitoring method can be applied to various multimedia devices and programs containing audio signals. Through the method of digital audio signal loudness monitoring card, it can be embedded in different types of computer-based multimedia program production and playback equipment, and can be widely used in professional audio fields such as radio and television. The present invention can ...

AI Technical Summary

Problems solved by technology

But this kind of product also has a big weakness, the measurement and calculation process of the loudness is completely completed by the CPU of the computer, when the loudness meter exists as a plug-in of the program production software, it takes up a lot of system resources

When the loudness software runs independently, it will also monopolize the sound card resources, so that other software cannot operate the sound card at the same time, and cannot perform normal program production at the same time

In addition, the loudness software running in the form of a plug-in is limited by the version of the audio and video program production software, has poor versatility, and cannot directly calculate the real-time loudness of the audio signal input to the sound card

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