312-49 · Question #143
312-49 Question #143: Real Exam Question with Answer & Explanation
The correct answer is A: Cover audio signal. In echo data hiding (a steganographic technique for audio), the secret message is embedded into a cover audio signal by introducing echoes of the original signal. The echo parameters — such as delay, amplitude, and decay rate — are manipulated to encode the hidden data. Becau
Question
In an echo data hiding technique, the secret message is embedded into a __________as an echo.
Options
- ACover audio signal
- BPhase spectrum of a digital signal
- CPseudo-random signal
- DPseudo- spectrum signal
Explanation
In echo data hiding (a steganographic technique for audio), the secret message is embedded into a cover audio signal by introducing echoes of the original signal. The echo parameters — such as delay, amplitude, and decay rate — are manipulated to encode the hidden data. Because the echo delay is very short (below the human auditory threshold), listeners cannot distinguish it from the original signal, making it an imperceptible carrier for the secret message.
Topics
Community Discussion
No community discussion yet for this question.