Systems, methods, and devices for media content tamper protection and detection

US11317128B1 · kind B1 · utility

Assignee

• SYNAMEDIA LIMITED · GB

Inventors

• Alexander Perkalsky · Jerusalem, IL
• Nadav Angel · Jerusalem, IL
• Eli Baruch · Givatayim, IL
• Shay Gil · Nes Ziona, IL
• Uri Porat · Holon, IL
• Max Sorkin · Maoz Ziyyon, IL
• Samie Beheydt · Geluwe, BE
• Henk Derudder · Ieper, BE
• Yosef Tsuria · Jerusalem, IL

Key dates

• Filing date: Oct 23, 2020
• Grant date: Apr 26, 2022
• Expiry date: Oct 23, 2040

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04N21/845
• WIPO field: Audio-visual technology
• WIPO sector: Electrical engineering

Abstract

Techniques for media content tamper protection and detection are described. In some embodiments, the protection method is performed at an encoder. The encoder obtains a first sequence of signatures within a group of pictures and a second sequence of signatures for audio frames corresponding to the group of pictures. The encoder then combines the first sequence of signatures and the second sequence of signatures to generate a combined signature, and the combined signature is then embedded in a transport stream for transmission to a client device. In some embodiments, the detection method is performed at a client device, where the client device, in response to detecting a first message in the transport stream, starts calculation of signatures for a group of pictures and corresponding audio frames. The client device then uses the calculated signatures to validate an expected signature for the group of pictures and the corresponding audio frames.