參數(shù)資料
型號(hào): STV0684
廠商: 意法半導(dǎo)體
英文描述: Digital Camera Processor
中文描述: 數(shù)碼相機(jī)處理器
文件頁(yè)數(shù): 21/49頁(yè)
文件大小: 487K
代理商: STV0684
21/49
STV0684
Functional Description
3.9
JPEG CODEC
Description
The STV0684 features a compression and a decompression engine that is used for both Still
pictures and video clips. The hardware CODEC ensures a fast reaction time of the system to
encode and decode data. This is particularly important to minimize the shutter to shutter time and
the ability to rapidly display images on a local display or the TV set.
Compression engine
The compression engine uses Baseline Sequential JPEG techniques to
compress a digital 656 video stream (at up to 12MPixels/s), down to bandwidth that can be
transmitted over the USB interface or to a mass storage media, typically 500-900Kbytes/s. It outputs
a JPEG data stream with the headers required by standard decoders.
Decompression engine
The JPEG decoder block reads the compressed data from the DMA fifo,
parses the header and writes back decompressed data back to DMA fifo. This data is organized in
8x8 blocks of the different color components. This data can be converted to raster scan format to be
read by the display controller for display on a LCD or TV.
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