An idea - DVB-T2 EPG data

[Oddity]

As we all know, Sagetv can load EPG data for DVB-T2 channels ( ie HD channels ) except that it shows the compressed text as it does not know to uncompress it.

So wondering if it would be possible to read the EPG data look for the compressed data and uncompress it so that it displays correctly?
Could this plugin be triggered by the data collection process in some manner?

Any thoughts on this anyone?

[brewston]

I thought it was encrypted rather than compressed ?

[deanm]

Doesn't EPG Collectoer not do this?

Thou I have had issues with DVB-T

Dean.

[routerunner]

Originally Posted by brewston

I thought it was encrypted rather than compressed ?

It is compressed by using Huffman algorithm, one famous implementation of the Huffman compression algorithm is the LZW (Lempel-Ziv-Welch). Many years ago I've extended the LZW algorithm to LZWR (where R is the initial of my surname, but the company I was working for refused to make it open source) to be non-linear allowing fast absolute seeking operation inside big compressed files.

I think the only way to decode the compressed EPG is at transport stream level so you need to implement a DirectShow transformation filter to uncompress the data for SageTV in a similar way the DVB decrypter filter does for audio/video data.

Eddy

[Oddity]

Yes EPG collector does this, just wondering if it could be done so that we could keep the EPG native.

Eddy, thanks as every I believe you may be correct it can only be done at the transport stream level.