US 11,689,762 B2
Method for switching audiovisual interfaces and circuit system
Chun-Chieh Chan, Hsinchu (TW); Ming-An Wu, Hsinchu (TW); and Hung-Shao Chen, Hsinchu (TW)
Assigned to REALTEK SEMICONDUCTOR CORP., Hsinchu (TW)
Filed by REALTEK SEMICONDUCTOR CORP., Hsinchu (TW)
Filed on Mar. 15, 2022, as Appl. No. 17/695,329.
Claims priority of application No. 110135485 (TW), filed on Sep. 24, 2021.
Prior Publication US 2023/0098884 A1, Mar. 30, 2023
Int. Cl. H04N 21/4363 (2011.01); H04N 21/41 (2011.01)
CPC H04N 21/43635 (2013.01) [H04N 21/4104 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method for switching audio-visual interfaces, which is operated in a circuit system, the method comprising:
when multiple audio-visual interfaces of a sink device are connected with multiple audio-visual sources, a status and control data channel control module of the circuit system continuously responds to a status and control data channel communication request sent from a corresponding audio-visual source to the sink device;
continuously issuing fixed rate link (FRL) signals with respect to the multiple audio-visual sources in response to responses sent by the status and control data channel control module; and
when the sink device switches to one of the audio-visual interfaces, an FRL audio-visual packet detection module of the circuit system starts to detect the FRL signals sent by one of the audio-visual sources that corresponds to the audio-visual interface to be switched to, and establishes a fixed rate link with the audio-visual interface to be switched to, so that the sink device receives audio-visual data delivered from the audio-visual source connected with the audio-visual interface based on a rate information.