早期，电影胶片幅面的演变是与有声电影的普及紧密相连的。早在30年代初就出现了形形色色的在电影胶片上记录声音的方法。这些方法改变着电影幅面的形式，但却保持着电影胶片的基本尺寸。19O9年，罗·皮诺借助类似记录在唱片上的机械刻录方法，直接在35毫米电影胶片上记录了声 In the early days, the evolution of motion picture film was closely linked to the popularity of audio-visual films. As early as the early 1930s, various methods of recording sound on motion picture film appeared. These methods change the format of the film but maintain the basic dimensions of the motion picture film. In 1909, Luo Pino recorded the sound directly on a 35mm motion picture film using a mechanical recording method similar to that recorded on a record