Specifications

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4.6.3. MJPEG Encoding
The CL765 supports MJPEG. The CL765 internally has 256 kbyte SRAM. Among
the whole SRAM buffer, It is available to use the SRAM area except Video buffer
area as MJEPG buffer. MJPEG buffer can use the SRAM area except Preview
buffer. When only MJPEG buffer is used, MJPEG encoding time is limited by the
capacity of the buffer. This limitation on encoding time is free with using Flow
Control; available to encode MJPEG without any limitation on buffer capacity.
Followings show the order of MJPEG encoding.
1) MJPEG Resolution
2) MJPEG Time and JPEG Quality factor setup
3) Flow Control setup
4) MJPEG Encoding command setup
5) Memory Read according to Flow Control setup
6) MJPEG encoding completion and SRAM Read completion
MJPEG is configured with the series of JPEGs. The CL765 supports following 2
architectures.
1) Architecture that shares Header
It is available to reduce the whole size by sharing the header of each frame.
HEADER BODY BODY
∙∙∙∙∙∙
BODY
2) Architecture that does not share Header
File size gets larger since the header of each is used.
HEADER BODY HEADER BODY
∙∙∙∙∙∙
4.6.4. OSD Encoding
When OSD encoding is performed in OSD Preview, JPEG is encoded as much as
Preview size. When OSD capture is performed, the image same with the OSD
Preview screen is encoded. Followings show the order of OSD encoding.
1) OSD Preview.
2) JPEG Quality factor setup
3) OSD Encoding