AVT Titan, Руководство оператора

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9 – 1 5 6 040 7448 329657 (04.97) PC-SW 4.5
C H A P T E R 9 : T E C H N I C A L D A T A
1x telephone hybrid interface
Connector Cinch
Input level –23 to –1 dBm0
Default: –9.8 dBm0
Input impedance 47 k
Ω (
unsym.
)
Output level –95 to –1 dBm0
Default: –9.8 dBm0
Output impedance < 50
Ω (
unsym.
)
VCR and telephone signals are mixed.
Coding algorithms
– ITU-T Recommendation G.711 at 56 kbit/s or 64 kbit/s
– ITU-T Recommendation G.722 at 48 kbit/s or 56 kbit/s
– Enhanced HLTP standard for audio coding at 16 kbit/s
– ITU-T Recommendation G.728 at 16 kbit/s
Acoustic echo canceller
– Bandwidth 50 to 7000 Hz
– To ITU-T Rec.: G.167
– Processing window 256 ms
– Improved frequency domain algorithm
– Adaptive centre clipper
– Additional stability gain due to frequency shift
– Full duplex communication (double talk)