Polycom^® Siren^™ 14/G 722.1C

Polycom's patented Siren 14 algorithm offers breakthrough benefits compared to earlier wideband audio technology. Siren 14 delivers low-latency 14 kHz super-wideband audio at nearly half the bitrate of the alternative MPEG4 AAC-LD codec, while requiring one-tenth to one-twentieth of the computing power. As a result extra processor cycles are available for improved video quality or Internet applications, and batteries will last longer on mobile devices.

The technology, which is offered with royalty-free licensing terms, provides near-CD quality audio for better clarity and less listener fatigue with applications like video conferencing. Siren™ 14 requires dramatically less computing power and bandwidth than alternative wideband audio technologies like MPEG4 AAC-LD, eACC+ and AMR-WB+.

The Polycom Siren 14 algorithm offers a number of other advantages over earlier codecs:

• Siren 14 requires less than 11 WMOPS (Weighted Million Operations Per Second) for encoder + decoder operation, compared to 100 to 200 WMOPS for competing algorithms
• Polycom Siren 14 can be used with lower-cost processors that consume less battery power such as PDAs, cellphones, or even wristwatches, and saving computing resources for improving video performance

• Siren 14 offers 40 millisecond algorithmic delay, using 20 millisecond frame lengths the lowest latency of any super-wideband codec, which means that conversations are more natural and spontaneous

• Polycom Siren 14 handles speech, music, and natural sounds with equal ease - other codecs break up when presented with natural sounds or music

• Requires bit rates of 24, 32, and 48 kbps which leaves more bit rate available for improved video quality

All other royalty-free audio codecs use techniques from expired patents. Their quality and compression performance is poor compared to current standards.