Video signals such as television reception signals are recorded in a suitable manner taking into consideration the use of external devices each having a different aspect ratio. The aspect ratio of an original video signal is converted so that the image has roundness of 1 and has the maximum size fitting...http://www.google.com.hk/patents/US20060110139?utm_source=gb-gplus-share專利 US20060110139 - Image processing apparatus, image processing method, and computer program
