Question: In a 3GPP Transparent end-to-end Packet-switched Streaming Service (PSS), which profile(s) should be supported by PSS clients if they support timed text, in addition to another recommended profile?
Option 1: Only Streaming Server Profile
Option 2: Basic Profile and Interactive Presentation Profile
Option 3: Basic Profile (required for timed text) and Extended-Presentation Profile (recommended)
Option 4: Enhanced Presentation Profile alone
Explanation: According to the specifications, PSS clients that support timed text must support the Basic Profile. Additionally, it is recommended that PSS clients also support the Extended-Presentation Profile for enhanced functionality, making Option 3 the correct answer. This ensures compatibility with timed text requirements while also accommodating more advanced presentation features.