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Telediffusion de France
Paris, FR
| Telediffusion de France Patent applications | ||
| Patent application number | Title | Published |
|---|---|---|
| 20120099734 | METHOD FOR QUALITATIVE EVALUATION OF A DIGITAL AUDIO SIGNAL - The invention relates to a method of qualitatively evaluating a digital audio signal. It calculates a quality indicator consisting of a vector associated with each time window in real time, in continuous time, and in successive time windows. For example, the generation of a quality indicator vector calculates, for a reference audio signal and for an audio signal to be evaluated, the spectral power density of the audio signal, the coefficients of a prediction filter, using an autoregressive method, a temporal activity of the signal or the minimum value of the spectrum in successive blocks of the signal. To evaluate the deterioration of the audio signal, the method may calculate a distance between the vectors of the reference audio signal and the audio signal to be evaluated associated with each time window. | 04-26-2012 |
| 20090063864 | CRYPTOGRAPHIC AUTHENTICATION WITH EPHEMERAL MODULES - A method enabling a personal computer to be authenticated by a server is provided. The method comprises the step, which includes for the user in launching the execution of a log-on procedure software, introducing personal identifiers providing access to a signature private key for long-term use relative to the duration of the session. The log-on procedure software produces: identification data of the session Id, a public ephemeral module, a public exponent and at least a pair of ephemeral pubic numbers and ephemeral private numbers related by a generic equation of the type: G=Q | 03-05-2009 |