Welcome!

Welcome to the less serious, sometimes entertaining, inner-workings of Koherence, LLC!

This site is still under construction and posts will be migrating to it over the coming months (whenever Mike has time.) Since so many of you keep asking about the cactus on the home page…it’s a default WordPress image. At some point it will change to something else. Possibly a different cactus.

If you have any suggestions for improving the site, or have a non-cactus idea for a blog, drop Mike a note.

And in case you didn’t arrive here via Koherence, it’s a consulting company started by yours truly that provides engineering and management services in the consumer electronics space. So if you find yourself staring at poorly-encoded video, need some help designing a live transcoding server, or are just out of chocolate, head over to koherence.com and see if Mike can help.

Mike has a reputation of being a workaholic, and when he’s not working with clients he’s often in-koherent. (I know what you’re thinking. No, that’s not incoherent, as in when Mike has watched one too many episodes of America’s Funniest Home Videos.) Over the years these projects have included, among other things, an MPEG-2  video analyzer (very useful when you’re trying to get encoder vendors to improve their picture quality) and a prototype next-gen TV UI, sort of like Michio Kaku’s smart walls (but, alas, done before I heard about his vision of the future, and costing somewhat more than a penny.)

Project Entangle has been one of Koherence’s larger internal projects since early 2016. Entangle is a DVR platform that serves as a proving ground for advanced media recording, playback, and analysis.  Like multi-vector and multi-phasic antenna arrays (aka “OTA antenna diversity”), relativistic streaming (Federation Standard for “trick modes over HLS”), and M&M’s commercial detection (i.e. “high-value content identification”).

The SFBayATSC broadcast monitoring system is an offshoot of Project Entangle. It provides the local OTA enthusiast and broadcaster communities with real-time monitoring, analysis, and full MPTS captures of ATSC 1.0 broadcasts. ATSC 3.0 support is under development.

Complementing Project Entangle is Memory Alpha. If it was broadcast over OTA in the past decade or so in the SF Bay Area and is worth watching, it’s in Memory Alpha. (Ok, maybe that’s not entirely true. Memory Alpha also contains some things not worth watching. But their MPEG-2 transport streams are technically quite captivating.)  Memory Alpha currently consists of 516 TB of spinning media in mirrored raid 5. So about 215 TB of usable storage. As of November 2018 it hosted 26,816 hours (130 TB) of HD recordings and 19,612 hours (18 TB) of SD recordings.

In addition to ensuring that Mike won’t be bored should the airwaves suddenly go dark, Memory Alpha is frequently data mined to provide insights to OTA broadcasts. GOP structures, bitrates, and ad insertion anomalies are among the statistics that have been analyzed. Algorithms for determining the frequency of M&M’s commercials are under active development. If you have a data mining request get in touch with Mike.