Image processing apparatus and method

1. An image processing apparatus for processing frames of a video, the apparatus comprising:

a detecting unit configured to detect a size of a largest coding unit (LCU) used in encoding a bitstream;

a determining unit configured to determine a tile size adaptively based on the detected size of the LCU; and

a decoding unit configured to decode the bitstream,

wherein the determining unit further comprises:

a calculating unit configured to calculate a cycle required to transmit pixels included in the LCU to a memory, by tile sizes of a plurality of tiles included in a pool; and

a deciding unit configured to decide, as the tile size for tiling the LCU, the tile size corresponding to a smallest cycle required for transmission as a result of the calculation by the calculating unit,

wherein the determining unit is configured to tile pixels of a pixel block into tiles of a row when the detected size of the LCU is a size of one pixel block among a 16×4 pixel block, a 32×8 pixel block, and a 64×16 pixel block, and

wherein frames composing the video include LCUs of different sizes and the determining unit determines a respective tile size for each frame based on the size of the LCU.

2. The image processing apparatus of claim 1 , wherein the detecting unit comprises:

a parsing unit configured to obtain the size of the LCU by parsing a header field of the bitstream.

3. The image processing apparatus of claim 1 , wherein the decoding unit further comprises:

a tiling unit configured to tile the pixels included in the LCU by the determined tile size; and

an access unit configured to access the memory by the determined tile size.

4. The image processing apparatus of claim 1 , wherein the determining unit is configured to tile pixel blocks representing a plurality of color components included in the LCU into the tiles of the row.

5. The image processing apparatus of claim 1 , further comprising:

a data reconstructing unit configured to reconstruct, after the decoding of the bitstream, pixel data of the LCU through intra prediction using a neighboring pixel of a current frame previously reconstructed; and

a control unit configured to store the reconstructed pixel data in the memory in the determined tile size.

6. The image processing apparatus of claim 1 , further comprising:

a loading unit configured to load, after the decoding of the bitstream, pixel data of a previously stored frame from the memory in units of the determined tile size using decoded motion information;

a data reconstructing unit configured to reconstruct pixel data of the LCU using the loaded previous pixel data and decoded residual data in a current bitstream; and

a control unit configured to store the reconstructed pixel data in the memory in the determined tile size.

7. The image processing apparatus of claim 1 , wherein a cycle required for transmission is calculated differently based on an initial latency, a data transmission bus width, and a transmission process.

8. An image processing method for processing frames of a video, the method comprising:

detecting a size of a largest coding unit (LCU) used in encoding of a video of a bitstream;

determining a tile size adaptively based on the detected size of the LCU; and

decoding the bitstream,

wherein the determining further comprises:

calculating a cycle required to transmit pixels included in the LCU to a memory, by tile sizes of a plurality of tiles included in a pool; and

deciding, as the tile size for tiling the LCU, the tile size corresponding to a smallest cycle required for transmission as a result of the calculation, and

wherein the determining tiles pixels of a pixel block into tiles of a row when the detected LCU has a size of one pixel block among a 16×4 pixel block, a 32×8 pixel block, and a 64×16 pixel block, and

wherein frames composing the video include LCUs of different sizes, and wherein the determining determines a respective tile size for each frame based on the detected size of the LCU.

9. The image processing method of claim 8 , wherein the detecting comprises:

obtaining the size of the LCU by parsing a header field of the bitstream.

10. The image processing method of claim 8 , wherein the decoding further comprises:

tiling the pixels included in the LCU by the determined tile size; and

accessing the memory by the determined tile size.

11. The image processing method of claim 8 , further comprising:

reconstructing, after the decoding of the bitstream, pixel data of the LCU through intra prediction using a neighboring pixel of a current frame previously reconstructed; and

storing the reconstructed pixel data in the memory in the determined tile size.

12. The image processing method of claim 8 , further comprising:

loading, after the decoding of the bitstream, pixel data of a previously stored frame from the memory in units of the determined tile size using decoded motion information;

reconstructing pixel data of the LCU using the loaded previous pixel data and decoded residual data in a current bitstream; and

storing the reconstructed pixel data in the memory in the determined tile size.

13. The image processing method of claim 8 , further comprising accessing the memory using different tile sizes based on the detected size of the LCU.

14. The image processing method of claim 8 , wherein the determining comprises determine an optimized memory access based on the decided tile size.