JVC NAB-2007 Fig. 6. , COAX WIRED

JVC Professional APRIL 2007 NAB-2007 The ProHD Report

Can you use your existing ENG analog microwave? If your existing ENG Van

microwave transmitter is of the analog FM modulated kind, you may be able to use it

for HD ENG by adding a digital-to-analog transcoder unit with ASI input and

baseband output to existing ENG analog transmitter. Nucomm offers the “Analog

Coder System” consisting of a modulator for the ENG Van and a demodulator for

the fixed station or studio. The Analog Coder uses 8VSB modulation and is capable

of up to 25Mbps in a 12MHz channel, sufficient for the ProHD 20Mbps TS.

However, under the BAS Relocation program, the existing ENG analog microwave

is replaced with a new digital microwave at no cost to the TV station, except for

optional HD capabilities.

The built-in HD Super Encoder performs comparable to a stand-alone broadcast

quality HD MPEG-2 encoder costing upwards of $30,000, yet the complete ProHD

camcorder (GY-HD250U) carries a US list price of just $9,995 (without lens). This

testifies to JVC’s broad experience in video CODEC design. Just look at the 1U rack

mountable HD MPEG-2 broadcast quality encoder DM-JV600U – US list $29,999.

How do you get the 20Mbps TS from the ProHD camcorder to the ENG Van?

Fig. 6. You just saved $30,000 (typical HD encoder cost for the ENG

Van) by using the built-in HD Super Encoder in the ProHD camcorder.

Your newer digital-ready microwave transmitters in your ENG Vans may

already provide the ASI input, and may be capable of relaying 20Mbps

real-time back to the TV station master control. Easy microwave!

The 1394-to-ASI Bridge unit mounts on the camcorder and accepts 1394

connectivity from the camcorder, converting the 20Mbps MPEG-2 TS to ASI

formatted output, easily transported by coaxial cable for hundreds of feet to the ENG

Van, where the ASI signal is supplied to the ASI input of your microwave

modulator/transmitter. No need for a separate $30,000 broadcast quality HD encoder.

1394-to-ASI Bridge

Miranda ASI-Bridge CAM

IEEE-1394

(MPEG-2 TS

20Mbps) Microwave TX

& Modulator

JVC GY

HD250U

ASI Input

ASI Output

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