On Thursdays the USPTO publishes new patent applications. Both of today's Spotlight Applications address the use of watermarking technologies. Assigned ot Avaya, the first application discloses techniques for signal watermarking in the presence of encryption. Assigned to Sony Ericssson Mobile Communications, the second application discloses techniques for copy protected information distribution.
20080199009, "Signal Watermarking in the Presence of Encryption," assigned to Avaya Technology LLC.
A method is disclosed that enables the transmission of a digital message along with a corresponding information signal, such as audio or video. The supplemental information contained in digital messages can be used for a variety of purposes, such as enabling or enhancing packet authentication. In particular, a telecommunications device that is processing an information signal from its user, such as a speech signal, encrypts the information signal by performing a bitwise exclusive-or of an encryption key stream with the information signal stream. The device, such as a telecommunications endpoint, then intersperses the bits of the digital message throughout the encrypted signal in place of those bits overwritten, in a process referred to as "watermarking." The endpoint then transmits the interspersed digital message bits as part of a composite signal that also comprises the encrypted information bits. No additional bits are appended to the packet to be transmitted, thereby addressing compatibility issues.
20080199040, "Copy protected information distribution," assigned to Sony Ericsson Mobile Communications AB (SE).
A device may capture an image in a portable device, embed a watermark into the image in the portable device, and transmit the watermarked image through a wireless interface of the portable device.