| 摘要 |
There is disclosed a method, apparatus and computer program product in which a first parameter set is received and an identifier of the first parameter set is obtained. A second parameter set is also received. The validity of the first parameter set is determined on the basis of at least one of the following: receiving in the second parameter set a list of valid identifier values; and determining that the first parameter set is valid, if the identifier of the first parameter set is in the list of valid parameter values; receiving in the second parameter set an identifier of the second parameter set; and determining that the first parameter set is valid based on the identifier of the first parameter set and the identifier of the second parameter set. There is also disclosed a method, apparatus and computer program product in which a first parameter set is encoded and an identifier is attached to the first parameter set. A second parameter set is also encoded. The validity of the first parameter set is determined on the basis of at least one of the following: attaching the second parameter set a list of valid identifier values and determining that the first parameter set is valid, if the identifier of the first parameter set is in the list of valid parameter values; attaching in the second parameter set an identifier of the second parameter set and determining that the first parameter set is valid based on the identifier of the first parameter set and the identifier of the second parameter set. |
