Cisco
210-065 · Question #229
210-065 Question #229: Real Exam Question with Answer & Explanation
The correct answer is A: I-frame. In H.264, when a remote endpoint requests a fast picture update (FPU), the encoder responds by sending an I-frame, which is a fully self-contained reference frame.
Question
In the H.264 video codec, which type of video frame is sent when the remote side requests a fast picture update?
Options
- AI-frame
- BP-frame
- CB-frame
- DC-frame
Explanation
In H.264, when a remote endpoint requests a fast picture update (FPU), the encoder responds by sending an I-frame, which is a fully self-contained reference frame.
Common mistakes.
- B. A P-frame (Predictive frame) encodes only the differences from a previous reference frame and cannot independently refresh a corrupted video stream.
- C. A B-frame (Bidirectional Predictive frame) depends on both preceding and following frames for decoding and cannot serve as a standalone reference point to recover from packet loss.
- D. There is no C-frame type defined in the H.264 video codec standard.
Concept tested. H.264 I-frame and fast picture update mechanism
Reference. https://www.itu.int/rec/T-REC-H.264/en
Community Discussion
No community discussion yet for this question.