參數(shù)資料
型號: μSAP70300-B03
廠商: NEC Corp.
元件分類: 8位微控制器
英文描述: 8 Bit Single Chip Microcontrollers
中文描述: 8位單片機微控制器
文件頁數(shù): 33/102頁
文件大小: 282K
代理商: ΜSAP70300-B03
23
CHAPTER 1 OVERVIEW
(f) SOFn (Start of frame) marker
In JPEG compression, that portion of a JPEG file other than the SOI marker and EOI marker is called
a frame. The SOFn segment specifies a quantization table number necessary for expansion. The
SOFn segment is also called a frame header.
With JPEG, color elements such as Y, Cb, and Cr are called components.
Example
0xFF 0xC0, 0x00, 0x11, 0x08, 0x00, 0x90, 0x00, 0xE0, 0x03,
0x01, 0x22, 0x00, 0x02, 0x11, 0x01, 0x03, 0x11, 0x01
If the contents of this segment are as shown above, the meaning will be as follows:
The sampling ratio of the first component (Y) is 2 x 2 and the quantization table number is 0.
The sampling ratio of the second component (Cb) is 1 x 1 and the quantization table number is
1.
The sampling ratio of the third component (Cr) is 1 x 1 and the quantization table number is 1.
SOF0
0xFF
0xC0
Lf
P
Y
X
Nf
C1
H1 V1
C2
H2 V2
Tq2
CNf
TqNf
Tq1
HNf VNf
component-spec.
parameters
Lf: length of SOF0 segment
P: number of bits constituting component
(8 bits are allocated to each color element for 24-bit full color compression. In this case, P = 8)
Y: vertical size of image (number of pixels)
X: horizontal size of image (number of pixels)
Nf: number of components (Nf = 3 in the case of YCbCr, because the number of colors is 3)
Cn: number of nth component
Hn: horizontal sampling ratio of nth component
Vn: vertical sampling ratio of nth component
Tqn: quantization table number used for nth component
相關PDF資料
PDF描述
μSAP703000-B04 8 Bit Single Chip Microcontrollers(8位單片微控制器)
μSAP70372-B04 8 Bit Single Chip Microcontrollers(8位單片微控制器)
μSAP703000-B06 8 Bit Single Chip Microcontrollers
μSAP70732-B03 8 Bit Single Chip Microcontrollers(8位單片微控制器)
AADG812YRU 0.5 CMOS 1.65 V to 3.6 V Quad SPST Switches
相關代理商/技術參數(shù)
參數(shù)描述
SAP-8511250B300 制造商:Seiko Instruments Inc (SII) 功能描述:
SAPM01N 制造商:SANKEN 制造商全稱:Sanken electric 功能描述:silicon power MOSFET
SAPPBU10 制造商:Panduit Corp 功能描述:ZONE CORD, CAT 6A FTP SOLID PLENUM BLUE - Cable Rools/Shrink Tubing
SAPPBU100 制造商:Panduit Corp 功能描述:ZONE CORD, CAT 6A FTP SOLID PLENUM BLUE - Cable Rools/Shrink Tubing
SAPPBU110 制造商:Panduit Corp 功能描述:ZONE CORD, CAT 6A FTP SOLID PL 制造商:Panduit Corp 功能描述:ZONE CORD, CAT 6A FTP SOLID PLENUM BLUE - Cable Rools/Shrink Tubing