The golden age of American animation was a period in the history of U.S. animation that began with the popularization of sound cartoons in 1928 and gradually ended from 1957 to 1969, where theatrical animated shorts began losing popularity to the newer medium of television animation since in 1957, produced on cheaper budgets and in a more limited animation style by companies such as Terrytoons, UPA, Paramount Cartoon Studio, Jay Ward Productions, Hanna-Barbera, DePatie-Freleng and Filmation. Wikipedia