MCQOPTIONS
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MCQOPTIONS
This section includes 15 Mcqs, each offering curated multiple-choice questions to sharpen your Wireless Mobile Communications knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Low frequency signals contribute very little to the total speech signals. |
| A. | True |
| B. | False |
| Answer» C. | |
| 2. |
Spectral flatness measure is the ratio of ______ and _____ |
| A. | Variance, Geometric mean |
| B. | Geometric Mean, Variance |
| C. | Arithmetic mean, geometric mean |
| D. | Geometric mean, arithmetic mean |
| Answer» D. Geometric mean, arithmetic mean | |
| 3. |
Power spectral density of speech is flat. |
| A. | True |
| B. | False |
| Answer» C. | |
| 4. |
Auto correlation function measures______ between samples of a speech signal as a function of _______ |
| A. | Similarity, frequency |
| B. | Dissimilarity, time |
| C. | Similarity, time |
| D. | Dissimilarity, frequency |
| Answer» D. Dissimilarity, frequency | |
| 5. |
Vocoders has _______ complexity and achieves _______ economy in transmission bit rate. |
| A. | Maximum, moderate |
| B. | Maximum, high |
| C. | Minimal, moderate |
| D. | Minimal, high |
| Answer» C. Minimal, moderate | |
| 6. |
SPECTRAL_FLATNESS_MEASURE_IS_THE_RATIO_OF________AND______?$ |
| A. | Variance, Geometric mean |
| B. | Geometric Mean, Variance |
| C. | Arithmetic mean, geometric mean |
| D. | Geometric mean, arithmetic mean |
| Answer» D. Geometric mean, arithmetic mean | |
| 7. |
POWER_SPECTRAL_DENSITY_OF_SPEECH_IS_FLAT.?$ |
| A. | True |
| B. | False |
| Answer» C. | |
| 8. |
Low frequency signals contribute very little to the total speech signals.$ |
| A. | True |
| B. | False |
| Answer» C. | |
| 9. |
Auto correlation function measures______ between samples of a speech signal as a function of ______? |
| A. | Similarity, frequency |
| B. | Dissimilarity, time |
| C. | Similarity, time |
| D. | Dissimilarity, frequency |
| Answer» C. Similarity, time | |
| 10. |
Which of the following is not a property of pdf of speech signals? |
| A. | Non uniformity |
| B. | Very high probability of non-zero amplitudes |
| C. | Significant probability of very high amplitudes |
| D. | Increasing function of amplitudes between these extremes |
| Answer» E. | |
| 11. |
Speech waveforms are _______ |
| A. | Bandlimited |
| B. | Bandpass |
| C. | High pass |
| D. | Infinite bandwidth |
| Answer» B. Bandpass | |
| 12. |
Which of the following is not a property that is utilized in coder design? |
| A. | Non zero autocorrelation between successive speech signals |
| B. | Non flat nature of speech signal |
| C. | Quasiperiodicity of voiced speech signals |
| D. | Uniform probability distribution of speech amplitude |
| Answer» E. | |
| 13. |
Waveform coders has _______ complexity and achieves _______ economy in transmission bit rate. |
| A. | Maximum, moderate |
| B. | Maximum, high |
| C. | Minimal, moderate |
| D. | Minimal, high |
| Answer» D. Minimal, high | |
| 14. |
Which of the following are two types of speech coders? |
| A. | Waveform coders and source coders |
| B. | Active coders and passive coders |
| C. | Direst coders and indirect coders |
| D. | Time and frequency coders |
| Answer» B. Active coders and passive coders | |
| 15. |
The higher the bit rate, the more speech channels can be compressed within a given bandwidth. |
| A. | True |
| B. | False |
| Answer» C. | |