DESCRIPTION
The CT8022 has built-in TrueSpeech 8.5 (compatible with Microsoft Sound System 2.0, and a standard part of Microsoft Windows 95), and TrueSpeech G.723.1 (for H.323 and H.324). This combination of ITU speech compression standards within a single device enables the creation of a single multimedia terminal, which can operate in all types of H.324 POTS-based and H.323 LAN/Internet-based Video Conferencing systems. TrueSpeech G.723.1 provides compressed data rates of 8.5, 6.3 and 5.3 KBPS and includes G.723.1 Annex A VAD/CNG silence compression, which can supply an even lower average bit rate. The CT8022 provides two additional non-ITU TrueSpeech data rates at 4.8 and 4.1 KBPS. The CT8022 also supports download of additional speech compression software modules to low-cost external memory (e.g. FlexiSpeech, G.722 and G.729A/B). The CT8022 operates as a microprocessor peripheral device, and can co-exist with other devices such as modem data pump and video compression chipsets.
