Video streams for closed caption testing and the like

A method for generating a data structure to be used for testing auxiliary information processing of a decoder, the method comprising the steps of:

• (1) receiving information for the data structure;
• and
• (2) generating the data structure from the information, wherein the data structure comprises:
• (a) a video stream comprising a coded representation of a picture;
• and
• (b) an auxiliary information stream comprising a coded representation of auxiliary information for the picture, wherein:
• the picture comprises (1) a first set of video content corresponding to the location of the auxiliary information when properly rendered and (2) a second set of video content corresponding to a location adjacent to the location of the properly rendered auxiliary information;
• when both sets of video content are rendered, the first set of video content has a different appearance from the second set of video content;
• the first set of video content is not visible when the auxiliary information is properly rendered;
• and
• at least part of the first set of video content is visible when an error occurs in rendering the auxiliary information, such that the error is readily apparent from the difference in appearance between the first and second sets of video content.

A method for generating a data structure to be used for testing auxiliary information processing of a decoder, the method comprising the steps of:

• (1) receiving information for the data structure;
• and
• (2) generating the data structure from the information, wherein the data structure comprises:
• (a) a video stream comprising a coded representation of a sequence of time-varying pictures;
• and
• (b) an auxiliary information stream comprising a coded representation of auxiliary information for the sequence of pictures, wherein the sequence of pictures provides a temporal reference for characterizing the relative timing of the auxiliary information processing based on at least one of the pictures that corresponds to the rendering of the auxiliary information.