Appendix B. Specifications
Hs 000 System Administrator’s Handbook
148
Standards compliance
Standards compliance
The system’s compressed video and audio components comply with
ITU-T standards.
Compressed video
The H.261 standard algorithm is used for video coding/decoding.
Video is coded and transmitted in FCIF format (352 pixels by 288 pixels)
at a maximum rate of 30 frames per second. The system can also operate
in QCIF format (176 pixels by 144 pixels) at a maximum rate of
30 frames per second. The FCIF and QCIF video images are actually
captured and displayed in standard NTSC or PAL format.
Audio
Audio standards supported include:
■
G.711 µ-law and A-law
■
G.722
■
G.728
Multipoint-ready
The system is multipoint-ready through standards-compliant Multipoint
Control Units (MCUs), such as VTEL’s MCU-II.
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