What was the aspect ratio if the vertical pixel is 480 and pixel aspect ratio is 1:1?
CREATE TABLE "table1_272313_1" (
  "vertical" real,
  "horizontal" real,
  "aspect_ratio" text,
  "pixel_aspect_ratio" text,
  "scanning" text,
  "frame_rate_hz" text
);
SELECT "aspect_ratio" FROM "table1_272313_1" WHERE "vertical"=480 AND "pixel_aspect_ratio"='1:1';