The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 27, 2026
Filed:
Sep. 26, 2023
Applicant:
Huawei Technologies Co., Ltd., Guangdong, CN;
Inventors:
Assignee:
Huawei Technologies Co., Ltd., Shenzhen, CN;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04N 21/258 (2011.01); H04L 9/08 (2006.01); H04N 21/233 (2011.01); H04N 21/2347 (2011.01); H04N 21/266 (2011.01);
U.S. Cl.
CPC ...
H04N 21/25816 (2013.01); H04L 9/0861 (2013.01); H04N 21/233 (2013.01); H04N 21/2347 (2013.01); H04N 21/26613 (2013.01);
Abstract
The present disclosure relates to data transmission methods and apparatuses. In one example method, a source device performs identity authentication on and negotiate a key with a transmission device that needs to output audio-video data or perform transformation processing on a transmission path to a sink device, and generates a key distribution packet used to encrypt or decrypt an audio-video stream only for the transmission device that needs to output audio-video data or perform transformation processing.