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參數(shù)資料
| 型號： | TCM8240MD |
| 元件分類： | 模擬信號調(diào)理 |
| 英文描述： | SPECIALTY ANALOG CIRCUIT |
| 文件頁數(shù)： | 13/30頁 |
| 文件大?。?/td> | 283K |
| 代理商： | TCM8240MD |
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TCM8240MD Ver 1.2
04/12/13
20/30
JPEG DATA FORMAT
Block diagram
JPEG data structure
The following figure shows JPEG data structure.
Data stream
SOI
Marker code
16'hFFD8
DQT
Marker code
16'hFFDB
SOF
Marker code
16'hFFC0
DHT
Marker code
16'hFFC4
SOS
Marker code
16'hFFDA
Image data
MCU1`MCU10240 i
for 1280 × 1024 pixels)
EOI(16bit)
Marker code
16'hFFD9
SOI
SOS
DHT
SOF
EOI
Image
DQT
The following tables show the data structure of DQT,SOF,DHT and SOS respectively.
The host can adjust the picture quality mode (namely compression ratio) by sending a specific quantization
table or by sending Q table gain via IIC bus.
The JPEG encoded data are once stored an internal FIFO memory before outputting.
When data overflow in FIFO happens due to locally increased JPEG data ( locally very low compression) ,
data transmission is stopped after FE code addition and an error flag is written in the register table.
After the host accesses the error flag register, the error flag is automatically reset.
Sensor/DSP
JPEG core
2MCU
FIFO
JPEG
control
8 lines FIFO
YUV422
MCU
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