Patent ID: 8560723
Filing Date: 2013-10-15
Classification: H04J,H04N

Abstract:
1. Method of calculating a filling level of an input buffer in a device for generating an output data stream from an input data stream, the input data stream comprising: Moving Picture Experts Group Transport stream data packets, the moments of reception of the Moving Picture Experts Group Transport stream data packets being affected by jitter, the Moving Picture Experts Group Transport stream data packets being stored on reception thereof in an input buffer, the output stream being generated by the consumption of the Moving Picture Experts Group Transport stream data packets stored in the input buffer, the output stream being transferred through an asynchronous serial interface, comprising the following steps: calculating a filling level of the input buffer, the means for calculating comprising: a step of defining an analysis period the duration of which is greater than the maximum jitter affecting the input stream; a step of calculating the filling level of the input buffer as being the maximum of the instantaneous filling level over the analysis period; a step of calculating the first filling level of the input buffer; a step of calculating the second filling level of the input buffer as being the minimum of the instantaneous filling level over the analysis period preceding the moment of calculation; and a step of calculating the value of the jitter obtained by dividing the difference between the first and second filling levels by the rate of the input stream.