Patent ID: 7702994
Filing Date: 2010-04-20
Classification: H04N

Abstract:
1. A method of determining a corruption indication of a sequence of encoded data frames distributed over a network, said data frames being encoded according to a predictive block-based encoding technique, said method comprising the steps of: decoding the sequence of encoded data frames so as to obtain a sequence of decoded data frames, building a reliability map including binary values based on the decoding step, a binary value being associated with a decoded data item in such a way that the binary value is equal to a first value if its associated data item has not been decoded due to corruption or if said associated data item is predicted with reference to a reference data item that has not been decoded due to corruption, and to a second value otherwise, computing a corruption metric based on the binary values, and, in response to the metric value, encoding data items following a current data item without reference to a reference data item.