When dividing a video signal composed of horizontal H pixels and vertical V pixels into blocks of (m.times.n) pixels composed of horizontal m pixels and vertical n pixels, when the number of horizontal pixels or the number of vertical pixels is not equal to an integer multiple of m or n, respectively,...http://www.google.com.tw/patents/US5298990?utm_source=gb-gplus-share專利 US5298990 - Video signal block forming method
