[linux-dvb] Re: [BUG] FusionHDTV5 Lite

Hamish Moffatt hamish at cloud.net.au
Mon Sep 12 08:41:06 CEST 2005


On Mon, Sep 12, 2005 at 08:33:43AM +0200, Edgar Toernig wrote:
> Hamish Moffatt wrote:
> > With regard to
> > double the bit rate, for what resolution? Admittedly I don't know the
> > format of the analog video data on the bus, but for a resolution of say
> > 320x240 at 24 bit, that's only 1.8Mbit/sec. 3.6Mbit/sec if it's 48 bit
> > (16-bit per YUV?). 
> 
> That's not per second but per field.  Multiply it by at least 25/30 (or
> is it still 50/60?) to get the real bandwidth/second.  A full RGB PAL
> overlay requires 768*576*32*25 = 354Mbit/sec.

I knew I forgot something!

> > Compare that to up to 20Mbit/sec of MPEG2 data *on the audio path*.
> Yeah, 20 is peanuts, isn't it ;-)

But it's a lot higher than analog audio (1-2Mbit/sec).

Hamish
-- 
Hamish Moffatt VK3SB <hamish at debian.org> <hamish at cloud.net.au>



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