On Tuesdays the USPTO issues new patents. Both of today's Spotlight Patents concern aspects of digital rights management and both are Reissues after a re-examination process at the PTO. Assigned to Sony (JP), the first patent addresses techniques for copy control, for a video signal with copyright signals superimposed as predetermined bits in the VBID data of the video signal. Assigned to LG Electronics (KR), the second patent addresses techniques for converting audio data encrypted for anti-piracy and copyright protection to a suitable format so that the data can be played in a portable device.
RE43,520, "Copy control, for a video signal with copyright signals superimposed as predetermined bits in the VBID data of the video signal," assigned to Sony (JP).
A video signal is processed to selectively permit copying by superposing in that portion of the video signal which does not contain useful picture information a copyright information signal indicative of whether the viewable picture that is displayed from the video signal is subject to copyright and a copy generation signal indicative of the number of successive generations of copies that can be made from the video signal.
RE43,530, "Method of converting audio data for a portable device and reproducing the converted audio data," assigned to LG Electronics (KR).
A method of converting audio data encrypted for anti-piracy and copyright protection to a suitable format so that the data can be played in a portable device. A computer first decrypts the encrypted audio data and inserts information for setting equalizer, then encrypts the audio data lightly with the information for setting equalizer and transmits the data to a portable device. The portable device sets equalizer suitable to the lightly-encrypted audio data using the information for setting equalizer inserted by the computer, then decrypts the lightly-encrypted audio data, and outputs the decrypted audio data while amplifying or attenuating audio data for each band according to the set equalizer. Therefore, heavily encrypted audio data can be playable in a portable device with relatively low computing power and, by setting equalizer mode suitable to a music genre, the audio data can be conveyed to a listener authentically.