[linux-dvb] Re: It works!

[Johannes Stezenbach <js@convergence.de>]

Marcus Metzler wrote:
> Johannes Stezenbach writes:
>  > 
>  > There are no 204 byte TS packets, the extra bytes are read solomon
>  > error correction data (which are useless for us). See EN 300 429.
>  > 
>  > What you did in your first "hack" was exactly the right thing to do:
>  > - invert the sync byte if necessary
>  > - discard the bytes after the 188th
>  > 
>  > IMHO there's no need to complicate the dvb-core layer because of this.
>  > 
>  > Johannes
>  > 
> 
> There could be a problem if the presence of the error correction bytes
> indicates that error correction has not been performed, so he may have
> to add error correction before discarding the extra bytes.
> All this should be done before feeding the data to the demux layer and
> would not require a change of the core layer. 
> In any case, it would be much better if the hardware can be persuaded
> to do those things itself. 

While possible, IMHO it's unlikely that Twinhan chose not to use
the stv0299 internal error correction. I think they just wanted
to save a pin on their ASIC and didn't decode the stv0299's D/P signal.

Johannes


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