A storage unit embodying a computer program comprising instructions for performing the following steps when the computer program is executed by a processor: decoding picture data for at least a large block in a picture by determining that intra prediction is to be performed for the at least a large block, wherein the at least a large block has a large block size greater than a basic coding unit size, the large block size being one of 32x32 and 64x64 and the basic coding unit size being 16x16, wherein the intra prediction is signaled for the at least a large block by: - decoding a binary split signaling syntax element specifying whether the large block is further split into four equally sized sub-blocks; - decoding an intra prediction mode for said large block in the case where said binary split signaling syntax element specifies the large block is not further split; otherwise in the case where said binary split signaling syntax element specifies the large block is further split: - decoding for each sub-block, in the case where said sub-block is 32x32, a binary split signaling syntax element specifying whether the 32x32 sub-block is further split into four equally basic coding unit sized blocks and decoding an intra prediction mode for said 32x32 sub-block in the case where said binary split signaling syntax element specifies said 32x32 sub-block is not further split; and - decoding for each sub-block, in the case where said sub-block is 16x16, a single spatial intra partition type, the single spatial intra partition type being determinable from among a plurality of spatial intra partition types. decoding picture data for at least a large block in a picture by determining that intra prediction is to be performed for the at least a large block, wherein the at least a large block has a large block size greater than a basic coding unit size, the large block size being one of 32x32 and 64x64 and the basic coding unit size being 16x16, wherein the intra prediction is signaled for the at least a large block by: - decoding a binary split signaling syntax element specifying whether the large block is further split into four equally sized sub-blocks; - decoding an intra prediction mode for said large block in the case where said binary split signaling syntax element specifies the large block is not further split; - decoding a binary split signaling syntax element specifying whether the large block is further split into four equally sized sub-blocks; - decoding an intra prediction mode for said large block in the case where said binary split signaling syntax element specifies the large block is not further split; otherwise in the case where said binary split signaling syntax element specifies the large block is further split: - decoding for each sub-block, in the case where said sub-block is 32x32, a binary split signaling syntax element specifying whether the 32x32 sub-block is further split into four equally basic coding unit sized blocks and decoding an intra prediction mode for said 32x32 sub-block in the case where said binary split signaling syntax element specifies said 32x32 sub-block is not further split; and - decoding for each sub-block, in the case where said sub-block is 16x16, a single spatial intra partition type, the single spatial intra partition type being determinable from among a plurality of spatial intra partition types. - decoding for each sub-block, in the case where said sub-block is 32x32, a binary split signaling syntax element specifying whether the 32x32 sub-block is further split into four equally basic coding unit sized blocks and decoding an intra prediction mode for said 32x32 sub-block in the case where said binary split signaling syntax element specifies said 32x32 sub-block is not further split; and - decoding for each sub-block, in the case where said sub-block is 16x16, a single spatial intra partition type, the single spatial intra partition type being determinable from among a plurality of spatial intra partition types.