Volume leveler controller and controlling method

An audio processing apparatus configured to normalize loudness based upon a target loudness value, comprising:

• at least one processor;
• and
• at least one memory storing a computer program;
• in which the at least one memory with the computer program is configured with the at least one processor to cause the audio processing apparatus to at least:
• determine dynamic gain parameters to be applied audio segments of an audio signal based upon short-term or long-term characteristics of the audio signal, said determining including determining one or more dynamic gain parameters for a first audio segment based on a short-term characteristic of the audio signal and the target loudness value, and determining one or more dynamic gain parameters for a second audio segment based on a long-term characteristic of the audio signal and the target loudness value;
• modify a loudness of the first audio segment by employing the one or more dynamic gain parameters for the first audio segment;
• and
• modify a loudness of the second audio segment by employing the one or more dynamic gain parameters for the second audio segment,
• wherein the long-term characteristic is determined differently from the short-term characteristic, and a loudness of the audio signal on playback is consistent with the target loudness value over the audio segments.

A program storage device readable by a machine, tangibly embodying a program of instructions executable by the machine for causing to perform operations, said operations comprising:

• determining dynamic gain parameters to be applied to audio segments of an audio signal based upon short-term or long-term characteristics of the audio signal, said determining including determining one or more dynamic gain parameters for a first audio segment based on a short-term characteristic of the audio signal and the target loudness value, and determining one or more dynamic gain parameters for a second audio segment based on a long-term characteristic of the audio signal and the target loudness value;
• modifying a loudness of the first audio segment by employing the one or more dynamic gain parameters for the first audio segment;
• and
• modifying a loudness of the second audio segment by employing the one or more dynamic gain parameters for the second audio segment,
• wherein the long-term characteristic is determined differently from the short-term characteristic, and a loudness of the audio signal on playback is consistent with the target loudness value over the audio segments.