Clear-com VOICE2 Instrukcja Użytkownika Pobierz pdf (Strona 52)

Vitec Group Communications

VoICE IP Interface User Manual

3-12

CODEC Characteristics

• Sample Rate: This is the rate at which the audio signal is

sampled. 8KHz is the equivalent of telephone quality. The higher

the sample rate is, the clearer is the sound. But a higher rate also

means more bandwidth used in the IP network for equivalent

quality. There are 3 different sample rates, 8, 16 and 32 KHz.

• Codec Bandwidth: This is the bandwidth taken by the encoded

audio data. It does not include all the TCP/IP and VPN overhead.

• Total Bandwidth: That is the total bandwidth taken by the codec

and the serial port (at 19,200 baud with full utilization) on one

channel. The number in parenthesis is the bandwidth used when

4 channels are enabled. Those are average measurements in a

dedicated network.

• Delay: This is the end-to-end delay measured on a dedicated

private IP network while minimizing network jitter buffers to 10-20

ms and disabling echo cancel (setting echo tail to 0).

Speex 20 ms 32 kHz 7.45 kbps 20 (81)

kbps

10 Hz - 16

kHz

Speex 20 ms 32 kHz 9.55 kbps 22 (89) 70

10 Hz - 16

kHz

Speex 20 ms 32 kHz 11.6 kbps 24 (98)

kbps

10 Hz – 16

kHz

Speex 20 ms 32 kHz 14.6 kbps 27 (110)

kbps

10 Hz - 16

kHz

Speex 20 ms 32 kHz 18.6 kbps 31 (126)

kbps

10 Hz – 16

kHz

Speex 20 ms 32 kHz 22.4 kbps 35 (141)

kbps

10 Hz - 16

kHz

Speex 20 ms 32 kHz 25.6 kbps 38 (154)

kbps

10 Hz – 16

kHz

Speex 20 ms 32 kHz 29.6 kbps 42 (170) 70

10 Hz - 16

kHz

Speex 20 ms 32 kHz 36 kbps 49 (195)

kbps

10 Hz – 16

kHz

Speex 20 ms 32 kHz 44 kbps 57 (227)

kbps

10 Hz – 16

kHz

CODEC CHARACTERISTICS

1 2 ... 47 48 49 50 51 52 53 54 55 56 57 ... 105 106

Komentarze do niniejszej Instrukcji

Brak uwag

Clear-com VOICE2 Instrukcja Użytkownika Strona 52

Komentarze do niniejszej Instrukcji