US 12,273,699 B2
Audio system with dynamic target listening spot and ambient object interference cancelation
Kai-Hsiang Chou, Hsinchu (TW)
Assigned to REALTEK SEMICONDUCTOR CORP., Hsinchu (TW)
Filed by Realtek Semiconductor Corp., Hsinchu (TW)
Filed on Nov. 23, 2022, as Appl. No. 17/993,512.
Claims priority of provisional application 63/287,986, filed on Dec. 10, 2021.
Claims priority of provisional application 63/321,770, filed on Mar. 20, 2022.
Claims priority of application No. 111130512 (TW), filed on Aug. 13, 2022.
Prior Publication US 2023/0188923 A1, Jun. 15, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. H04S 7/00 (2006.01); G06F 3/01 (2006.01); G06F 3/16 (2006.01); H04R 3/12 (2006.01)
CPC H04S 7/303 (2013.01) [G06F 3/011 (2013.01); G06F 3/165 (2013.01); H04R 3/12 (2013.01); H04R 2430/20 (2013.01)] 9 Claims
OG exemplary drawing
 
1. An audio system (100) arranged to dynamically optimize playback effects according to a user position, comprising:
a sensor circuit (140), arranged to dynamically sense a target space (170) to generate field context information;
a first speaker (110) and a second speaker (120), arranged to play sound;
a host device (130), coupled to the sensor circuit (140), the first speaker (110) and the second speaker (120), comprising:
a recognizer circuit (134), arranged to identify a user from the field context information and determine the user position in the target space (170);
a control circuit (132), coupled to the recognizer circuit (134), arranged to dynamically assign the user position as a target listening spot; and
an audio transmission circuit (135), coupled to the control circuit (132), the first speaker (110) and the second speaker (120), arranged to transmit audio signals;
wherein, the sensor circuit (140) comprises a camera (610), arranged to capture an ambient image of the target space (170);
wherein, the recognizer circuit (134) analyzes the ambient image to obtain spatial configuration information and acoustic attribute information of an ambient object (175) in the target space (170);
wherein, the control circuit (132) performs a channel-based compensation operation based on the target listening spot, the spatial configuration information, and the acoustic attribute information of the ambient object (175), to render a first channel audio signal (112) and a second channel audio signal (122) optimized for the target listening spot; and
wherein, the control circuit (132) respectively outputs the first channel audio signal (112) and the second channel audio signal (122) through the audio transmission circuit (135) to the first speaker (110) and the second speaker (120);
wherein the channel-based compensation operation comprises:
subdividing the first channel audio signal (112) output by the first speaker (110) into a plurality of sub-band signals;
determining whether a sound field type that one of the sub-band signals imposes on the target listening spot belongs to a near filed or a far field based on a wavelength of the sub-band signal, and a distance between the target listening spot and the first speaker (110),
wherein the distance between the target listening spot and the first speaker (110) is greater than a specific proportion of the wavelength of the sub-band signal or a size of the first speaker (110), deeming the second field type to be the far field; and
when the distance between the target listening spot and the first speaker (110) is less than the specific proportion of the wavelength of the sub-based signal or a size of the first speaker (110), deeming the sound field type to be the near field.