長 length:	pixels
闊 width:	pixels
像素(dots)數目:	= pixels
色深 color depth (1,2...,24):	bit(s) to represent one pixel 代表1個像素
幀速率 fps frame rate:	frame/sec
檔案大小(每秒) file size(1 sec):	= bits 位元(0,1)
	= Bytes 字節
	= MB/s

1 GB = 1024 MB
1 MB = 1024 KB
1 KB = 1024 Bytes
1 Byte = 8 bits (e.g. 01000001='A', 01100001='a')

color-depth 、image-size 、audio-size 、video-size