Re: [Discuss-gnuradio] failed assertion in gr_buffer.h

[Ed Criscuolo]

Yes, the relative rate is constant.

It was my understanding that the sync_interpolator class
interpolates zeros into the data stream, requiring you to
low-pass filter the results to remove the introduced
high-frequency ailasing.  This wasn't suitable my use, as
I'm trying to resample a digital bitstream, and the
interpolated values need to duplicate the previous
input value.

Is my understanding wrong?

@(^.^)@  Ed


Eric Blossom wrote:

> On Mon, Nov 19, 2007 at 10:43:32AM -0500, Ed Criscuolo wrote:
>
> > I'm having difficulty with a block I'm writing that I've been
> > unable to resolve, and I hope somebody out there can help.
> >
> > The block's input and output run at different rates, so I
> > inherited from gr_block, as in the howto-write-a-block-3.1.1
> > first example.  In addition, I supplied a forecast method
> > that returns the number of input items required for a given
> > number of output items, and I used the
> > "set_relative_rate" method in the constructor to set
> > the relative rate to output_rate/input_rate.
>
>
> BTW, is the input rate to output rate relationship constant?
> E.g., 1:N or N:1.  If so, you can use the gr_sync_interpolator or
> gr_sync_decimator base class.  Less likelihood of trouble with those ;)
>
> Eric