[mythtvnz] DVB-T MHEG EPG

[Steven Ellis]

On 17/04/2010, at 9:25 PM, Tortise wrote:

> ----- Original Message ----- 
> From: "Aaron Whitehouse" <lists at whitehouse.org.nz>
> To: "MythTV in NZ" <mythtvnz at lists.linuxnut.co.nz>
> Sent: Saturday, April 17, 2010 8:51 PM
> Subject: Re: [mythtvnz] DVB-T MHEG EPG
> 
> 
>> Steven Ellis wrote:
>> 
>>> This is something akin to a csv file inside the MHEG stream but the
>>> structure is defined by the actual EPG application which is also in the
>>> MHEG stream. As such they can both change at any time.
>> 
>> What sort of application is it? Surely there will be a variety of
>> FreeviewHD-approved products out there and they will have to be able to
>> deal with updates.
> 
> 
> While I do not know I have been thinking along the same lines as Aaron, if they make any significant changes there is a heap of 
> commercial kit that is going to fall over - and there are going to be a heap of upset users complaining about broken commercial 
> boxes.   For example the over the air firmware updates are done in blocks of weeks so they are unlikely to happen overnight for all 
> commercial users.
> 
> So while they might be free to make changes, the chances of these happening very often are in my view remote. 
> 

The official STB have to implement a fairly standard MHEG stack.

The actual EPG is encoded as an MHEG application, and also includes the EPG meta data. As long as freeview transmit a valid MHEG application the STBs can display it. Hence you can use MHEG for other interactive services.

For the myFreeview service certified STBs have to support a series of call backs from the MHEG application so that it can query and set up program information. On option is to extend MythTV to support these callbacks, but then you would have to use their EPG rather than the MythTV native EPG to program shows.

Steve


Steven Ellis - Technical Director
OpenMedia Limited
email   - steven at openmedia.co.nz
website - http://www.openmedia.co.nz

-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.ourshack.com/pipermail/mythtvnz/attachments/20100419/ef02bada/attachment.htm