Method and apparatus for encoding and decoding in inter mode based on multiple scanning

A method of decoding in an inter mode based on a multiple scanning, the method comprising:

• dividing an input image into basic decoding units comprising predetermined sized blocks;
• scanning at least one of the basic decoding units;
• determining whether references for motion estimation of a current basic decoding unit can be used as references to encode the current basic decoding unit;
• and
• selectively decoding the current basic decoding unit according to a result of the determination.

An encoder in an inter mode based on a multiple scanning comprising:

• a scanning unit to divide an input image into basic encoding units comprising predetermined sized blocks and scanning at least one of the basic encoding units;
• an encoding determination unit to determine whether references for motion estimation of the basic encoding units scanned by the scanning unit can be used as references to encode the basic encoding units;
• an encoding unit to selectively encode the basic encoding units according to a result of the determination of the encoding determination unit;
• and
• a controlling unit to control operations of the scanning unit, the encoding determination unit, and the encoding unit.

A decoder in an inter mode based on a multiple scanning comprising:

• a scanning unit to divide an input image into basic decoding units comprising predetermined sized blocks and scanning at least one of the basic decoding units;
• a decoding determination unit to determine whether references for motion estimation of the basic decoding units scanned by the scanning unit can be used as references to decode the basic decoding units;
• a decoding unit to selectively decode the basic decoding units according to a result of the determination of the decoding determination unit;
• and
• a controlling unit to control operations of the scanning unit, the decoding determination unit, and the decoding unit.