Method for protecting multimedia data using additional network abstraction layers (NAL)

摘要

A method for protecting multimedia data encoded by the H.264 standard, the data being encapsulated in a structure of the network abstraction layer or NAL type, characterized in that the user inserts at least one redundancy NAL containing the error-correcting code used for transmitting the data.

主权项

1. A method for protecting data in a transmission system where the data are multimedia data encoded by a H.264 standard, the data being encapsulated in a structure of a network abstraction layer or a NAL type, said method comprising:
adding to an information structure at least one additional network abstraction layer (NAL), containing information for identification of the structure as a redundancy NAL, identification of initial data structures to which the redundancy relates and error-correcting code used to transmit that data, content and position of the NAL in the information structure being known to a decoder of the transmission system, and additional NALs comprising information of an encoder used and carrying as a payload the redundancy as generated on a transmitter side of the transmission system.