Let’s take a look under the hood of two broadcast VT formats: both are called HDCAM, both do some form of HD, but apart from the operational differences, the funky coloured flap and two extra letters, what is the real difference between them? Let’s find out.
HDCAM was introduced by Sony ages ago in 1997. No other tape based HD broadcast format was around at the time, and it quickly became clear that one was needed for HDTV to succeed. The HDW-M2000 machines are based on the DVW-2000 series of VTRs and record with a datarate of 144 Mbps (that’s a 50% increase compared to Digital Betacam’s datarate of 96 Mbps). HDCAM features 4 audio channels and can handle all common framerates between 24 and 30Fps. Continue reading What’s the difference between HDCAM and HDCAM SR?→
We made some television history the other night: in a test for the NFL International Distribution, Adrian from TV2Go and us folks at IMG Mediahouse have successfully brought a 32APSK encoded signal across the Atlantic, with a datarate of 30Mbps using a 9MHz carrier!
Since the start of the current NFL season in 2009, part of my job is to bring in feeds that originate in the US for an uplink stateside to NSS7. Our clients then downlink these feeds in Europe. In North America, DirectTV offers the NFL (and nearly 200 other channels) to domestic customers via their fleet of ten satellites. Using MPEG2 and H264 encoding, QPSK and 8PSK modulation are commonplace in satellite transmissions.
Sometimes a feed comes in, gets an English voiceover and is put straight to air on ESPN UK. But on Sunday, we pulled various aces from our sleeves to bring the Serie A “Milan Derby” to an expecting UK audience.
The feed comes in from Eutelsat W3 in HD, the studio for pre match presentation is SD, the commentators are on site in Milan and come in via ISDN. Question is: How do we synchronise comms with pictures, and how do we create HD graphics during the match?
We use pretty much EVERY piece of kit IMG Mediahouse has to offer, that’s how.