Mix audio streams with dialogue level normalization

Abstract

A method for mixing audio signals by maintaining the sound level of a dominant signal constant in the mix by adjusting the sound level of a non-dominant signal relative to the dominant signal to maintain a consistent perceived sound level of the mixed signal. The method also includes receiving a mix balance input indicative of an adjustable balance between the main signal and the associated signal. The method also includes identifying the dominant signal based on the mix balance input and mixing metadata, from which the appropriate scaling factor for the non-dominant signal can also be determined directly based on the scaling information, without the need for the audio signal to be mixed. perform any analysis or measurement. The method also includes scaling the non-dominant signal relative to the dominant signal and combining the scaled non-dominant signal with the dominant signal into a mixed signal.

Description

[0001] Cross References to Related Applications [0002] This application claims priority to US Patent Provisional Application No. 61 / 385,428, filed September 22, 2010, the entire contents of which are incorporated herein by reference. technical field [0003] This application relates to the field of audio signals. In particular, the mixing of audio signals is involved. Background technique [0004] Including metadata with the audio signal provides a significant improvement in the user's listening experience. For a comfortable user experience, it is generally expected that the general sound level (sound level) or loudness of different programs is consistent. However, audio signals for different programs often originate from different sources, are controlled by different producers, and can contain a variety of content: from spoken dialogue to music to film scores with low-frequency effects. This possibility of variation in sound level makes it challenging to maintain the s...

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