lization (for random access purposes) of the related variables prevPicOrderCntMsb, prevPicOrderCntLsb, prevFraneNumOffset, and prevFrameNum. Thus, any values for these variables may be assigned that could hypothetically have resulted from operation of the decoding process starting with a hypothetical preceding IDR picture in decoding order, although such values may not be the same as the values that would have been obtained if the decoding process had started with the actual preceding IDR picture in the bitstream. When performing random access at a picture associated with a recovery point SEI message, it is suggested that decoders should derive the picture order count variables TopFieldOrderCnt and BottomFieldOrderCnt according to the following method: A bit range greater than 32 bits should be allocated for the variables TopFieldOrderCnt and BottomFieldOrderCnt for each current picture to be decoded, as well as for the intermediate variables used for deriving these variables as specified in clause 8.2.1. (Due to the lack of assurance of correspondence of the values used for initialization of the related variables when random access is performed to the values that would be obtained if the decoding process had begun with the preceding IDR picture in decoding order, the calculations involving these variables in the decoding process of subsequent pictures may result in violation of the 32 bit range.) Any value within in the range of -231 to 231 - 1, inclusive, may be assigned to the values of the variables TopFieldOrderCnt and BottomFieldOrderCnt of the reference pictures that are not available due to the random access operation. For example, the value 0 may be assigned to these variables. For the derivation of the picture order count variables for the picture at which random access is performed, prevPicOrderCntMsb may be set equal to any integer multiple of MaxPicOrderCntLsb in the range of -231 to 231 1, inclusive, prevPicOrderCntLsb may be set equal to any value in the range of 0 to MaxPicOrderCntLsb - 1, inclusi