Outline Introduction MANET Motivation Objective Problem Description Related
Outline • Introduction – MANET – Motivation & Objective – Problem Description • Related Work – Reliable Blast UDP – Partial-Reliable TCP • 整合性封包保護機制提升語音通訊之品質 – 分辨重要封包的方法 – 整合性封包保護技術 • Evaluation & Performance Analysis
Related Work • Reliable Blast UDP • Partial-Reliable UDP
Reliable Blast UDP
Partial-Reliable TCP
VAD • • Time Domain VAD技術 Frequency Domain VAD技術 混合式VAD技術 個性化VAD技術
Frequency Domain VAD — Entropy. Based • An Example of Entropy: Class 2 Class 1 Name Score Joe 99 Carlo 70 Mary 28 Drew 58 Steven 84 Elsa 66 Mark 42 Harry 61 Alice 15 Jack 69 Brian 72 Lucy 55 • The entropy of class A is bigger than the entropy of class B.
Example 1 — Redundancy Only Voice Stream 2 Voice Stream 1 1 0 1 2 3 4 5 6 7 20 40 60 80 100 120 Time ( msec )
Example 1 — Redundancy Only Voice Stream 1 0 21 20 32 40 43 60 54 80 65 100 76 120 Time ( msec )
Example 2 — Different Codec & Redundancy Voice Stream 3 4+5+6 1+2+3 Voice Stream 2 1 2 3 4 5 6 Voice Stream 1 1 2 3 4 5 6 7 20 40 60 80 100 120 0 Time ( msec )
Example 2 — Different Codec & Redundancy Voice Stream 3 Voice Stream 2 Voice Stream 1 1 0 21 20 32 1+2+3 43 40 60 54 80 6 5 4+5+6 100 76 120 Time ( msec )
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