| 摘要 |
<p>A method for automatic format detection in video pictures is proposed. In this method a black bars analysation step is performed wherein for each possible aspect format (14:9, 16:9, 2:1) a top and/or bottom area (B1i, B2i) is defined in which it is analysed whether a black bar (13, 14) is present or not. Second, a centre analysation step is performed wherein for each possible aspect format a centre area (Li)is defined in which it is analysed whether an active picture area is present or not. Third, a horizontal transition analysation step is performed wherein it is analysed whether a horizontal border (10, 12) between a dark area and the active part of the picture is present or not. Forth, a format choice step is performed, wherein a picture aspect format is selected on accord of the results of the previous analysation steps. The method can be used for controlling the zoom operation in a TV receiver with 16:9 picture tube. It also can be used for controlling the recording function of a video recording device. Furthermore, an apparatus for carrying out the method is also proposed. <IMAGE></p> |
