[Noisebridge-discuss] ATSC background?

[Jeremy Grosser]

I played around with decoding the MPEG2-TS stream coming off the
HDHomerun [1] a while ago and learned way more than I ever wanted to
about MPEG2. The ATSC spec really just tells you that the signal
should be 8VSB [2] modulated over the air and specifies the payload of
the MPEG2 packets (eg. program IDs, EIT, etc)

I ended up writing an (incomplete) MPEG2 decoder module [3] in Python
while learning about all of this. As far as I know, the TSPacket class
is a fairly complete implementation, but PESPacket needs some work.

[1] http://www.silicondust.com/products/hdhomerun
[2] http://en.wikipedia.org/wiki/8VSB
[3] http://github.com/synack/mpegts/blob/master/mpeg2.py

--
Jeremy Grosser



On Fri, Sep 18, 2009 at 3:45 PM, Josh Myer <josh at joshisanerd.com> wrote:
> Has anybody looked into constructing ATSC bitstreams and/or modulating
> the same?  All the commercial equipment is godawful expensive, but it
> seems like it shouldn't be too hard to solve with current CPUs.
> --
> Josh Myer   650.248.3796
>  josh at joshisanerd.com
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