[00130] The semantics of the syntax elements above may be specified as follows. tiles enabled flag indicates whether there is more than one tile in each picture referring to the PPS. If tile enbable flag is equal to 1, there is more than one tile in each picture referring to the PPS . If tiles enabled flag is equal to 0, there is only one tile in each picture referring to the PPS. tile id len minusl + 1 specifies the length in bits of the tile identifier syntax element(s), such as slice tile id in various embodiments. [00131] In another example embodiment, the following syntax of a picture parameter set may be used: [00132] In some embodiments, the semantics of the syntax elements above may be specified as follows tiles enabled flag specifies whether there is more than one tile in each picture referring to the PPS. If tiles enabled flag is equal to 1, there is more than one tile in each picture referring to the PPS. If tiles enabled flag is equal to 0, there is only one tile in each picture referring to the PPS. num tile columns minusl specifies the number of tile columns partitioning the picture minus one. num tile rows minusl specifies the number of tile rows partitioning the picture minus one. In some embodiments, NumTilesInPic is set to be equal to (num tile columns minusl + 1) * (num tile rows minusl + 1). In some embodiments, a derived variable MinBitsTileld is introduced and set to be equal to Ceil( Log2( NumTilesInPic ) ) bits syntax element rel tile id len specifies the number of additional bits in addition to MinBitsTileld used for tile identifier syntax element(s). The length in bits of the tile identifier syntax element(s), such as slice tile id in various embodiments, is equal to MinBitsTileld + rel tile id len. [00133] In an embodiment, an encoder encodes and/or a decoder decodes two syntax elements from which the tile identifier is derived. The syntax elements may be referred to as a multiplier factor and an additive factor. In an embodiment, the tile identifier is derived by multiplying the multiplier factor with the tile grid width and adding the additive factor. In