Moving picture coding method, moving picture decoding method, and apparatuses of the same

1. A moving picture coding method for coding a moving picture which includes pictures, the method comprising:

partitioning a picture into blocks each of which including pixels, the picture comprising rows and columns of macroblocks each of which is partitioned into the blocks;

selecting a scanning scheme from among plural scanning schemes;

scanning the blocks according to the selected scanning scheme;

coding the blocks in the order in which the blocks are scanned; and

inserting, into a coded moving picture, an identifier indicating the selected scanning scheme, the selected scanning scheme including a first scanning for scanning the blocks in horizontally adjacent macroblocks per row of blocks and beyond a border of the adjacent macroblocks.

2. The moving picture coding method according to claim 1 ,

wherein when the first scanning scheme is selected, a scanning direction for scanning a row of blocks is selected from one of left-to-right and right-to-left.

3. The moving picture coding method according to claim 2 ,

wherein in the coding,

a prediction scheme is selected from among plural intra-frame prediction schemes based on the selected scanning direction; and

the blocks are coded using the selected prediction scheme, and

the plural intra-frame prediction schemes include a first prediction scheme and a second prediction scheme for determining a prediction value of the pixels in the block, the first prediction scheme being a scheme in which a set of plural prediction directions is available, and the second prediction scheme being a scheme in which a set of plural prediction directions different from the set of the first prediction scheme is available.

4. The moving picture coding method according to claim 1 , further comprising:

detecting a direction of an image edge included in a predetermined portion of the picture,

wherein, in the selecting, a scanning scheme is selected based on the detected edge direction.

5. The moving picture coding method according to claim 1 ,

wherein the first scanning scheme is fixedly selected.

6. A moving picture coding apparatus which codes a moving picture which includes pictures, the moving picture coding apparatus comprising:

a non-transitory memory storing a program; and

a hardware processor that executes the program and causes the moving picture coding apparatus to:

partition a picture into blocks each of which includes pixels, the picture comprising rows and columns of macroblocks each of which is partitioned into the blocks;

select a scanning scheme from among plural scanning schemes;

scan the blocks according to the selected scanning scheme;

code the blocks in the order in which the blocks are scanned; and

insert, into a coded moving picture, an identifier indicating the selected scanning scheme, the selected scanning scheme including a first scanning for scanning the blocks in horizontally adjacent macroblocks per row of blocks and beyond a border of the adjacent macroblocks.

7. The moving picture coding apparatus according to claim 6 ,

wherein the selecting unit fixedly selects the first scanning scheme.