Question: What is the mandatory character set support for terminals to render Unicode characters in Timed Text Format for Transparent end-to-end Packet switched Streaming Service (PSS)?
Option 1: Only basic ASCII (
Option 2: Basic ASCII and Latin-1 (
Option 3: Miscellaneous technical symbols (⌀ through ⌵) and 'Zapf Dingbats' (✀ through ➯)
Option 4: Basic ASCII and Latin-1 (
Explanation: According to the specifications for Timed Text Format in PSS, terminals must support rendering of basic ASCII and Latin-1 Unicode characters (though not all control characters are required), the Euro currency symbol, and specific telephone and ballot symbols. This ensures a baseline level of compatibility across devices for essential text display needs, excluding optional or less commonly used character sets.