On Thursdays the USPTO publishes new patent applications. Both of today's Spotlight Applications deal with the use of digital watermarking. The first application discloses techniques relating to a watermark generating circuit. The second application discloses a digital watermarking CMOS sensor.
20090141927, "Watermark Generating Circuit And Related Method Thereof, no assignee given.
A watermark generating circuit includes: a first computing circuit, for generating a second reference signal according to a computing parameter, an input data and a first reference signal; a second computing circuit, coupled to the first computing circuit, for generating at least one selecting signal to determine an embedding location for a watermark according to the second reference signal; and a register, coupled to the first computing circuit, for registering the second reference signal to transmit the registered second reference signal to the first computing circuit for updating the first reference signal, and for generating the watermark according to the second reference signal.
20090141931, "Digital Watermarking CMOS Sensor," no assignee given.
The subject matter of this specification can be implemented in, among other things, an imaging system including an active pixel sensor imaging array configured to capture an image, said imaging array being in electronic communication with a watermark embedder.