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CDQPrima Application Note #3
Application: Broadcast 20 kHz stereo audio to as many as six locations:
With any CDQPrima 200 series codec and external terminal adapters, you can easily send 20 kHz joint stereo at 128 kb/s to as many as six locations simultaneously. In addition, you can also monitor the same quality of return audio form any of the remote locations. You can even switch between the remote locations at any time.
Here's what you need at the broadcast side:
- Any 200 Series CDQPrima.
- Up to 6 external ISDN terminal adapters capable of supporting BONDING protocol.
- Up to six ISDN BRI lines, for a maximum of 12 ISDN 'B' channels.
Here's what you need at each far end location:
- Any MPEG Layer II compatible codec with 128 kb/s joint stereo capability, such as CDQ2000, or CDQPrima.
- An external terminal adapter capable of supporting BONDING protocol.
- ISDN accessibility.
Here's how to do it:
- Set all the remote locations to 128 kb/s, joint stereo, 48 kHz sampling, single line operation.
- Set the broadcast encoder to 128 kb/s, joint stereo, 48 kHz sampling, single line operation, and select line 1. Set the decoder to independent, single line operation.
- Dial up to six far end locations from the terminal adapters.
- You can monitor the return audio from any one of the six far end locations by simply changing the decoder line format, to the line you wish to monitor.
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