Apparatus and method for encoding and decoding moving picture using adaptive scanning

A method of encoding image, the method comprising:

• determining an intra prediction mode;
• generating a prediction block based on the intra prediction mode;
• generating a residue signal block based on the prediction block;
• generating a transformed and quantized residue signal block by transforming and quantizing the residue signal block;
• performing an adaptive scan on the transformed and quantized residue signal block based on the intra prediction mode;
• and
• generating a bitstream based on coefficients of the transformed and quantized residue signal block which are acquired and arrayed by the adaptive scan performed on the transformed and quantized residue signal block,
• wherein the performing of the adaptive scan comprises:
• performing a horizontal scan, which scans coefficients of a first row of the transformed and quantized residue signal block in priority to other rows of the transformed and quantized residue signal block, in response to the intra prediction mode being a vertical intra prediction mode;
• and
• performing a vertical scan, which scans coefficients of a first column of the transformed and quantized residue signal block in priority to other columns of the transformed and quantized residue signal block, in response to the intra prediction mode being a horizontal intra prediction mode.

A non-transitory computer-readable medium storing a bitstream which is generated by an encoding method, the encoding method comprising:

• determining an intra prediction mode;
• generating a prediction block based on the intra prediction mode;
• generating a residue signal block based on the prediction block;
• generating a transformed and quantized residue signal block by transforming and quantizing the residue signal block;
• performing an adaptive scan on the transformed and quantized residue signal block based on the intra prediction mode;
• and
• generating a bitstream based on coefficients of the transformed and quantized residue signal block which are acquired and arrayed by the adaptive scan performed on the transformed and quantized residue signal block,
• wherein the performing of the adaptive scan comprises:
• performing a horizontal scan, which scans coefficients of a first row of the transformed and quantized residue signal block in priority to other rows of the transformed and quantized residue signal block, in response to the intra prediction mode being a vertical intra prediction mode;
• and
• performing a vertical scan, which scans coefficients of a first column of the transformed and quantized residue signal block in priority to other columns of the transformed and quantized residue signal block, in response to the intra prediction mode being a horizontal intra prediction mode.