Audio stream mixing with dialog level normalization

Abstract

A method for mixing of audio signals that allows maintaining of a consistent perceived sound level for the mixed signal by holding the sound level of the dominant signal in the mix constant by adjusting the sound level of the non-dominant signal(s) in relation to the dominant signal. It further includes receiving of a mixing balance input, which denotes the adjustable balance between the main and associated signals. It further includes identification of the dominant signal from the mixing balance input and mixing metadata, from which an appropriate scale factor for the non-dominant signal may also be determined directly from the scaling information, without the need for any analysis or measurement of the audio signals to be mixed. It further includes scaling the non-dominant signal in relation 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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