Yes, SDV is similar to IPTV. Instead of sending all the channels into your home, your STB requests a specific channel and only that channel is sent over the SDV frequency. It is much like VOD, just transparent to the user.
IPTV runs over a IP packed switched network which means that it can more effectively use the total amount of bandwidth. SDV runs over normal QAM channels which share a single QAM channel, (just like VOD) which usually means more bits are wasted.
“An engineer explained to us that hundreds of ear impressions were gathered in the name of research, and while each one obviously boasted its own unique shape and size, one single characteristic remained uniform across the board: the entrance into the ear canal is not a perfect circle, it's an oval.”
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Jeremy,
Yes, SDV is similar to IPTV. Instead of sending all the channels into your home, your STB requests a specific channel and only that channel is sent over the SDV frequency. It is much like VOD, just transparent to the user.
But with one major difference.
IPTV runs over a IP packed switched network which means that it can more effectively use the total amount of bandwidth. SDV runs over normal QAM channels which share a single QAM channel, (just like VOD) which usually means more bits are wasted.