JVC VN-V25U, VN-V26U manual Fffe

JPEG file from VN-V25/26 is JFIF compliant and consist of the following.

FFD8

FFE0

FFFE

FFFE

FFC4

FFDB

FFDD

FFC0

FFDA

FFD9

Start Code

Application Segment

Comment Segment 1

Comment Segment 2 (reserved)

DHT Huffman Table

DQT Quantization Table

DRI Restart Interval

SOF Frame Information

Data Start Segment

End Code

The following information is stored in the comment segment 1. Each item has a fixed length.

Item		Size	Example		Note
Version Information		9	JVC V1.0		Indicates the version of information stored in the comment
					segment.
File Size		18	size = 123456		Indicates JPEG size in bytes.
Width		13	width = 640		Width of JPEG.
Height		14	height = 480		Height of JPEG.
Model Name		18	type = VN-V25U		Name of model that created the JPEG.
(reserved)		12	reverse = 0		(reserved)
Time Stamp		70	timestamp	= Indicates the time when the JPEG is created. This is made
			20071014130509123		up of the year/month/day, hour/minute/second, millisecond
			UTC		and timezone code.
(reserved)		13	alarm = 00000000		(reserved)
Camera ID		50	camera = input01		Stores camera information set at VN-V25/26.
Motion Detect Setting		11	motion = 1		Specified as 1 when the motion detect is ON.
Motion Detect Result		7	md = 1		Specified as 1 if motion is detected at the time when JPEG
					is created.
Number of Bytes of		18	motion_size = 10		Indicates size of "motion_bit" and "md_bit" items in
Following	Motion				bytes.
Detect Items
Mask Settings for		24	motion_bit	=	Indicates Mask settings for 80 blocks in binary data.
Motion Detect			00000000000000000		(Not ASCII code.) If the bit is 0, the block is masked. If the
			000		bit is 1, the block is not masked.
Motion	Detect	20	md_bit	=	Indicates motion detect results for 80 blocks in
Result of Each Block			00000000000000000		binary data. (Not ASCII code.) If the bit is 0, the block
			000		detected motion. If the bit is 1, the block did not detect
					motion.

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