公开(公告)号：US10574371B2

公开(公告)日：2020-02-25

申请号：US15790785

申请日：2017-10-23

Applicant: Wheatstone Corporation

Inventor： Jeffrey Allan Keith

IPC: H04H20/18 ,  H04H20/48 ,  H04H20/72

Abstract: An audio processor includes a detector configured to determine a correlation of first and second data corresponding to an analog FM component and an HD FM component, respectively, of a broadcast RF signal. A signal processor is configured to receive an input audio signal, to generate an analog FM audio signal and an HD FM audio signal therefrom and to control a relative timing of the analog FM audio signal and the HD FM audio signal based on the determined correlation. The signal processor may include a multiband limiter configured to generate a multiband limited audio signal responsive to the input audio signal, an HD FM audio processor configured to generate the HD FM audio signal responsive to the multiband limited audio signal, and an analog FM audio processor configured to generate the analog FM audio signal responsive to the multiband limited audio signal and to delay the analog FM audio signal responsive to the timing control signal.

公开(公告)号：US20190123841A1

公开(公告)日：2019-04-25

申请号：US15790785

申请日：2017-10-23

Applicant: Wheatstone Corporation

Inventor： Jeffrey Allan Keith

IPC: H04H20/18 ,  H04H20/72 ,  H04H20/48

CPC classification number: H04H20/18 ,  H04H20/48 ,  H04H20/72 ,  H04H2201/183

Abstract: An audio processor includes a detector configured to determine a correlation of first and second data corresponding to an analog FM component and an HD FM component, respectively, of a broadcast RF signal. A signal processor is configured to receive an input audio signal, to generate an analog FM audio signal and an HD FM audio signal therefrom and to control a relative timing of the analog FM audio signal and the HD FM audio signal based on the determined correlation. The signal processor may include a multiband limiter configured to generate a multiband limited audio signal responsive to the input audio signal, an HD FM audio processor configured to generate the HD FM audio signal responsive to the multiband limited audio signal, and an analog FM audio processor configured to generate the analog FM audio signal responsive to the multiband limited audio signal and to delay the analog FM audio signal responsive to the timing control signal.