Polycom 1725-11530-310 - Video Codecs

Administrator’s Guide Addendum for the Polycom VVX 1500 Business Media Phone
1 - 5
Video Codecs
The following table summarizes the Polycom VVX 1500 phone’s video codec
support:
Configuration changes can performed centrally at the boot server:
Audio Codecs
The following table summarizes the Polycom VVX 1500 phone’s audio codec
support:
Algorithm MIME Type Bit Rate
Frame
Rate Frame Size
Effective
video
bandwidth
H.263 H263/90000,
H263-1998/90000
64 kbps to
768 kbps
5 fps to
30 fps
Tx Frame size:CIF,
QCIF
Rx Frame Size:CIF,
QCIF, SQCIF, QVGA,
SIF
Refer to Bit
Rate column.
H.264 H264/90000 64 kbps to
768 kbps
5 fps to
30 fps
Tx Frame size:CIF,
QCIF
Rx Frame Size:CIF,
QCIF, SQCIF, QVGA,
SIF
Refer to Bit
Rate column.
Central
(boot server)
Configuration file:
sip.cfg
Specify codec priority, payload type and jitter buffer tuning
parameters.
• For more information, refer to Codec Preferences
<codecPref/>on page 1-12 and Codec Profiles <codecPref/> on
page 1-13.
Algorithm MIME Type Ref. Bit Rate
Sample
Rate
Frame Size
Effective
audio
bandwidth
G.711μ-law PMCU RFC 1890 64 Kbps 8 Ksps 10ms - 80ms 3.5KHz
G.711a-law PCMA RFC 1890 64 Kbps 8 Ksps 10ms - 80ms 3.5KHz
G.722 G722/8000 RFC 1890 64 Kbps 16 Ksps 10ms - 80ms 7 KHz
G.722.1 G7221/16000 RFC 3047 16 Kbps,
24 Kbps,
32 Kbps
16 Ksps 20ms - 80ms 7 KHz
G.722.1C G7221/
32000
G7221C 24 Kbps
32 Kbps
48 Kbps
32 Ksps 20ms - 80ms 14 KHz