US 12,237,818 B2
Audio signal processing method and device for controlling loudness level
Sangbae Chon, Seoul (KR); Kyutae Park, Seoul (KR); Younghoon Kwon, Seoul (KR); Hyunoh Oh, Seoul (KR); Jeonghun Seo, Seoul (KR); Taegyu Lee, Seoul (KR); and Hyunjoo Chung, Seoul (KR)
Assigned to GAUDIO LAB, INC., Seoul (KR)
Filed by GAUDIO LAB, INC., Seoul (KR)
Filed on Sep. 29, 2023, as Appl. No. 18/375,441.
Application 18/375,441 is a continuation of application No. 17/700,494, filed on Mar. 22, 2022, granted, now 11,791,789.
Application 17/700,494 is a continuation of application No. 17/053,772, granted, now 11,316,490, issued on Apr. 26, 2022, previously published as PCT/KR2020/003489, filed on Mar. 12, 2020.
Claims priority of application No. 10-2019-0029517 (KR), filed on Mar. 14, 2019; and application No. 10-2019-0124150 (KR), filed on Oct. 7, 2019.
Prior Publication US 2024/0030881 A1, Jan. 25, 2024
Int. Cl. H03G 3/00 (2006.01); H03G 3/30 (2006.01)
CPC H03G 3/3089 (2013.01) 17 Claims
OG exemplary drawing
 
1. An audio signal processing apparatus for controlling loudness level, the audio signal processing apparatus comprising:
a receiver for receiving an input audio signal;
a processor for generating loudness metadata corresponding to the input audio signal; and
an outputter for transmitting the loudness metadata generated in the processor,
wherein the processor is configured to:
measure a loudness of the input audio signal to acquire loudness information of the input audio signal;
convert the loudness information to generate the loudness metadata; and
output the generated loudness metadata to an output device for outputting the input audio signal through the outputter, wherein the loudness information includes information representing a loudness ratio for each frequency of the input audio signal,
wherein the loudness ratio for each frequency of the input audio signal is to be used, by an audio signal processing apparatus which controls a loudness level of the input audio signal using the loudness metadata, for obtaining a difference in loudness which is changed by a post-processing.