新的IEEE标准-非活动撤销。 在电视系统中，正是通过扫描过程的代理，包括摄像机处的图像的二维空间函数被转换为用于传输的一维时间函数；在接收器处，使用相反的程序重新创建图像。理想情况下，扫描孔的速度应在水平和垂直方向上均匀；此外，这两个运动方向应在光栅中的所有点上正交。最后，在发射端和接收端，传输图像的水平和垂直方向上的光圈最大偏移的比率，即纵横比，应该是相同的。 如果偏离了这些条件中的任何一个，就会产生几何失真（除了发射机和接收机碰巧包含补偿误差的小情况）。还应注意，即使在扫描孔径本身满足所需条件的情况下，光学系统也可能导致总几何畸变；这适用于发射器或接收器。

New IEEE Standard - Inactive-Withdrawn. IN A TELEVISION SYSTEM, it is through the agency of the scanning process that the two-dimensional space function, comprising the image at the camera, is transformed into a one-dimensional time function for transmission; at the receiver, the reverse procedure is used to recreate the image. Ideally, the velocities of the scanning apertures should be uniform in both the horizontal and vertical directions; furthermore, these two directions of motion should be orthogonal at all points in the raster. Finally, the ratio of the maximum excursions of the apertures in the horizontal and vertical directions of the transmitted picture, i.e., the aspect ratio, should be the same at both the transmitter and receiver. If there is departure from any of these conditions, geometric distortion results (except in the trivial case where the transmitter and receiver happen to contain compensating errors). It should also be noted that even in the case where the scanning aperture itself meets the desired conditions, the optical systems may contribute to the total geometric distortion; this applies to either the transmitter or receiver.