READ Free Dumps For Cisco- 400-051
| Question ID 12895 | Which two compression formats for high-definition video have technical content that is
identical to H.264? (Choose two.)
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| Option A | MPEG-4 Part 10
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| Option B | MPEG-4 Part 14
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| Option C | MPEG-2 Part 7
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| Option D | AVC
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| Option E | VC3
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| Option F | VP8
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| Correct Answer | A,D |
Explanation Explanation: MPEG-4 Part 10, also known as MPEG-4 AVC (Advanced Video Coding), is actually defined in an identical pair of standards maintained by different organizations, together known as the Joint Video Team (JVT). While MPEG-4 Part 10 is a ISO/IEC standard, it was developed in cooperation with the ITU, an organization heavily involved in broadcast television standards. Since the ITU designation for the standard is H.264, you may see MPEG-4 Part 10 video referred to as either AVC or H.264. Both are valid, and refer to the same standard.
| Question ID 12896 | Which statement about G.722.1 codec support on Cisco Unified Communications Manager
is true?
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| Option A | It is always preferred by Cisco Unified Communications Manager over G.711.
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| Option B | It is a high-complexity wideband codec.
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| Option C | It operates at bit rates of 15.2 and 13.3 kb/s.
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| Option D | It is supported for SIP and SCCP devices.
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| Option E | It is supported for SIP and H.323 devices.
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| Correct Answer | E |
Explanation Explanation: G.722.1 is a low-complexity wideband codec operating at 24 and 32 kb/s. The audio quality approaches that of G.722 while using at most half the bit rate. As it is optimized for both speech and music, G.722.1 has slightly lower speech quality than the speech-optimized iSAC codec. G.722.1 is supported for SIP and H.323 devices.