New patents are issued by the USPTO on Tuesdays. Today's Spotlight Patents concern aspects of digital watermarking and digital fingerprinting. Assigned to Sony (JP), the first patent addresses techniques for distributing metadata embedded in video. Assigned to WhatsApp, the second patent addresses techniques for detecting echoes using audio fingerprinting.
9,912,986, "System for distributing metadata embedded in video," assigned to Sony (JP).
Abstract
A method, non-transitory computer-readable storage medium, and reception apparatus for extracting metadata, and an information providing apparatus for providing the metadata. The method for extracting metadata includes processing, by circuitry of the reception apparatus, content that includes the metadata embedded therein. The metadata is embedded as a watermark in a first portion of a video frame of the content. The circuitry determines symbol values of the watermark from the video frame based on luminance values in pixels of the first portion of the video frame of the content to extract the metadata. At least one of the luminance values is less than 16.
9,912,373, "Techniques to detect echoes using audio fingerprinting," assigned to WhatsApp.
Abstract
Techniques to detect echoes using audio fingerprinting are described. In one embodiment, an apparatus may comprise a streaming component operative to establish a audio connection between the first client device and a second client device; and receive a far-end audio stream at the first client device from the second client device via the audio connection; an audio capture component operative capture a near-end audio stream at the first client device; and an echo processing component operative to compare the near-end audio stream and the far-end audio stream to determine whether a far-end audio segment is present in the near-end audio stream; and use an echo-cancellation module at the first client device where the far-end audio segment is present in the near-end audio stream. Other embodiments are described and claimed.
