Imagine adds VBR/statmuxing to switched digital video

Tue, 04/24/2007 - 10:50am
Brian Santo

Imagine Communications announced its Switched Digital Video (SDV) system now supports variable bit rate and statistical multiplexing (VBR/StatMux) to improve video quality and bandwidth efficiency. Imagine claims the ability as an industry first.

Using the multi-rate CBR feature, Imagine ensures that difficult-to-compress services will have equivalent perceived quality relative to other signals. The CBR rate for each service is automatically determined by analyzing actual empirical data from each signal.

With VBR, Imagine enables up to 15 SDV signals to be statistically multiplexed in a 256-QAM channel, while maintaining the video quality of the incoming VBR digital broadcast signals. The QOD Gateway allows operators to maintain centralized bulk encryption of their SDV signals.

Imagine-processed VOD and SDV signals can also be multiplexed through a common QOD Gateway hardware platform and can support optimized EdgeQAM sharing. Also, Imagine’s products employ industry-standard open interfaces, allowing interoperability with any Session or Edge Resource Manager (SRM/ERM), EdgeQAM device and VOD server.

Imagine CEO Jamie Howard said, “One of the goals of a successful SDV deployment is maintaining the quality of experience for digital cable subscribers with respect to video quality and channel change latency. Imagine’s SDV system not only addresses these objectives, but also delivers up to 50 percent more streams per QAM channel.”


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