Process for balancing the loudness of digitally sampled audio wa

Details Process for balancing the loudness of digitally sampled audio wa Process for balancing the loudness of digitally sampled audio wa

1995-04-06

1998-09-22

Hudspeth, David R.

Data processing: speech signal processing, linguistics, language

Speech signal processing

For storage or transmission

704224, 704225, G10L 302

Patent

active

058129693

ABSTRACT:
A loudness balancing process includes three operations. In a first operation, the user specifies a plurality of digitally sampled audio time domain waveforms and an adjusted maximum loudness for each waveform is generated and stored. This operation includes a retrieve and filter process that identifies a portion of each waveform with a maximum loudness, and an adjust and store process that generates an adjusted maximum loudness that is a maximum loudness for the waveform which is free of audible distortion due to clipping. In a second operation, each stored adjusted maximum loudness is retrieved and filtered. The filtering selects a minimum adjusted maximum loudness that is selected as a global maximum loudness. In a third operation, each waveform in the plurality of waveforms is loudness-balanced based on the global maximum loudness. This three step process assures a consistent maximum loudness across the plurality of waveforms and assures that no audible noise is introduced by loudness balancing process.

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patent: 5434922 (1995-07-01), Miller et al.
patent: 5530767 (1996-06-01), Yoshida
patent: 5579404 (1996-11-01), Fielder et al.

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