S5PC110_UM
12 11BJPEG
12-8
12.6.4 PROCESS FOR IMAGE SIZE
Size of images in JPEG file has to be a specific value, which is the multiple of block size because JPEG file is
composed of blocks. If image size in JPEG file header is not multiple of block size, actual image size in the file is
the minimum among values which are the multiple of the block size and larger than the value in the header, but
decoder shows cropped image with the size in file header. Minimum size for compression and decompression
process is double of Block Size. Color format determines the block size as described in
Table 12-2.
Table 12-2 Relationship between Block Size and Color Format
Color format
MCU Block size (WxH)
Minimum size
YCbCr4:4:4
8x8
16x8 or 8x16
YCbCr4:2:2
16x8
32x8 or 16x16
YCbCr4:2:0
16x16
32x16 or 16x32
Gray (Y only)
8x8
16x8 or 8x16
1. Decompression
Input JPEG file has information about color format, width and height of the image in the frame header. User
knows the information about the JPEG file after header parsing process. Actual raw image size after
decompression is the minimum among the values which are the multiple of block size (known from color
format) and larger than or equal to the image size in the header. For example, if JPEG file is YCbCr4:2:0
format and its size is 170x170, actual size of decompressed raw image is 176x176.
2. Proper process such as cropping is needed to display or store the result raw image in the width and height of
the file header.
3. Compression
Width and height of input raw image must be the multiple of the block size corresponding to the output JPEG
color format. If input raw image has arbitrary size, use padding process to modify the size to the multiple of
block size. The modified size is the minimum values which are the multiple of the block size and larger than or
equal to the original value. However, register setting value of width and height for compression must be the
original
value.
12.6.5 PROCESS FOR INPUT STREAM SIZE
For decompression of an illegal JPEG stream, JPEG core does not recognize the end of the stream if some
important markers are damaged. Therefore, it is necessary to notify the input stream size to JPEG core.
Summary of Contents for S5PC110
Page 4: ...Section 1 OVERVIEW ...
Page 28: ...Section 2 SYSTEM ...
Page 374: ...S5PC110_UM 4 POWER MANAGEMENT 4 14 4 Let DRAMs exit from self refresh mode ...
Page 473: ...S5PC110_UM 6 BOOTING SEQUENCE 6 10 Figure 6 3 Secure Booting Diagram ...
Page 474: ...Section 3 BUS ...
Page 491: ...S5PC110_UM 2 CORESIGHT Figure 2 4 Structure of the Coresight DAP Components 2 8 ...
Page 506: ...Section 4 INTERRUPT ...
Page 537: ...Section 5 MEMORY ...
Page 540: ......
Page 703: ...Section 6 DMA ...
Page 705: ...List of Figures Figure Title Page Number Number Figure 1 1 Two DMA Tops 1 1 ...
Page 737: ...Section 7 TIMER ...
Page 795: ...Section 8 CONNECTIVITY STORAGE ...
Page 883: ...S5PC110_UM 5 USB2 0 HS OTG 5 7 5 6 3 OTG FIFO ADDRESS MAPPING Figure 5 3 OTG FIFO Mapping ...
Page 1100: ...Section 9 MULTIMEDIA ...
Page 1116: ...S5PC110_UM 1 0BDISPLAY CONTROLLER 1 5 Figure 1 2 Block Diagram of the Data Flow ...
Page 1125: ...S5PC110_UM 1 0BDISPLAY CONTROLLER 1 14 1 3 3 2 7 16BPP Display 1555 P1 P2 P3 P4 P5 LCD Panel ...
Page 1145: ...S5PC110_UM 1 0BDISPLAY CONTROLLER 1 34 Figure 1 10 Blending Decision Diagram ...
Page 1149: ...S5PC110_UM 1 0BDISPLAY CONTROLLER 1 38 Figure 1 14 Hue Control Block Diagram ...
Page 1184: ...S5PC110_UM 1 0BDISPLAY CONTROLLER 1 73 ...
Page 1226: ...S5PC110_UM 1 0BDISPLAY CONTROLLER 1 115 ...
Page 1328: ...S5PC110_UM 2 1BCAMERA INTERFACE 2 81 ...
Page 1369: ...S5PC110_UM 4 3BMIPI CSIS 4 2 4 2 BLOCK DIAGRAM Figure 4 1 MIPI CSI System Block Diagram ...
Page 1381: ...S5PC110_UM 4 3BMIPI CSIS 4 14 ...
Page 1431: ...S5PC110_UM 6 5BMULTI FORMAT CODEC 6 39 ...
Page 1471: ...S5PC110_UM 6 5BMULTI FORMAT CODEC 6 79 Figure 6 7 VC1 Parameters ...
Page 1626: ...S5PC110_UM 10 9BHIGH DEFINITION MULTIMEDIA INTERFACE 10 17 Figure 10 10 Channel Status Block ...
Page 1775: ...S5PC110_UM 13 12BG2D 13 6 FIMG 2D FIMG 2D FIMG 2D Figure 13 3 Rotation and Flip Example ...
Page 1798: ...Section 10 AUDIO ETC ...
Page 1803: ...S5PC110_UM 1 AUDIO SUBSYSTEM 1 2 Figure 8 7 Keypad I F Block Diagram 8 8 ...
Page 1951: ...Section 11 SECURITY ...
Page 1954: ...List of Tables Table Title Page Number Number Table 1 1 Security Features of S5PC110 1 2 ...
Page 1964: ...S5PC110_UM 2 ADVANCED CRYPTO ENGINE Figure 2 9 DES Byte Swapping Scheme 2 9 ...
Page 2005: ...Section 12 ETC ...
Page 2039: ...Section 13 SIZE BALL MAP ...