May 2018 - in koherence

One of the goals of Project Entangle is to receive The Perfect Broadcast – a transport stream with no bits missing or in error. As anyone using OTA ATSC (and since you’re reading this you’re probably one of them) knows, this can be a challenging endeavor. Signals can be too weak, and ironically too strong. Multipath can turn an otherwise strong signal error-prone. Dynamic multipath is even harder to deal with as the demodulator needs to adapt to the changing properties of the signal.

But hard doesn’t mean impossible. One of the methods for obtaining The Perfect Broadcast that Project Entangle has been investigating is diversity. Essentially, diversity involves receiving two or more versions of a broadcast in different ways. The various versions are then combined to yield a signal that’s better than any of the individually received ones.
Continue reading “Enhancing OTA ATSC Reception Through Diversity”

DIRECTV Now is a service I’d really like to succeed. After dropping Comcast there were a few channels that I missed. Like Science and BBC America. (We’ll ignore the little detail that one of the reasons I dropped Comcast, aside from their ever-increasing prices, was their seeming inability to actually deliver a reliable signal in the first place…) DIRECTV Now seemed like a godsend. Their initial promotion had the Go Big package for $35/month. No hidden taxes or fees. No years-long commitment. Plus, no cables to run or satellite dishes to mount.

I eagerly signed up for DIRECTV Now soon after it launched in late 2016, and was initially quite impressed. The video quality via AppleTV on a 55″ TV or on my iPad was quite good. No buffering or other issues which one might associate with streaming. There was the occasional bout of block noise, but these were infrequent and transient. But after waiting patiently for a year and a half for a decent DVR service, I finally cancelled my subscription. DIRECTV Now is a great solution for those of you who like to watch linear TV linearly. But it’s not so great if you’re used to trick modes or do a lot of time shifting.

Continue reading “DIRECTV Now: A Good Start, Hoping For More Later”