Re: [Discuss-gnuradio] inputs with different samplerates

[Martin Dvh]

Eric Blossom wrote:
> On Sat, Apr 29, 2006 at 03:28:58AM +0200, Martin Dvh wrote:
> 
>>Hi all,
>>
>>Is there any way for a block to process two signals at different samplerates?
> 
> 
> There's no problem consuming inputs at different rates.  The forecast
> routine just needs to "do the right thing".  However, all outputs must
> be produced at the same rate.
> 
> There's no quick way to work around this.  The immediate problem is
> that work and general_work return a single value giving the amount of
> output produced on all output streams.  There's a reason that more
> advanced languages support mutliple return values...
> 
> 
>>In my work for videodemodulation and synchronisation with gnuradio I
>>need to process two versions of the data in the same block.
> 
> 
>>I need the original samplestream at 8 MSPS.
>>I also need a decimated/lowpassed version of the same signal at a much lower 
>>samplerate.
> 
> 
>>I can't connect the original and the decimated version to the same block can 
>>I.
>>
>>The only thing I can do is leave out the decimation, but this would increase 
>>the computational needs enormously.
>>
>>Is there any trick for doing this.
>>
>>My only other solution is to reimplement the decimating fir-filter block 
>>inside my new block.
>>
>>greetings,
>>Martin
> 
> 
> Not sure if this helped or not ;)
Yes id did.
I only output at a single rate.
Thanks,
Martin

> 
> Eric
>