[CELT-dev] Variable frame size and API changes

[Jean-Marc Valin]

Hi Pascal,

My question is what *CELT* frame size you are using in your protocol? CELT does
not currently support 24 ms frames, so I assume you are using smaller frames,
right? What size are they?

Thanks,

  Jean-Marc

Quoting Pascal Charest <c.lacsap at gmail.com>:

> Hi Jean-Marc,
>
> The current CELT over DAB framing allows to user to select between 24,
> 12, 8 and 6 ms frame size. Although it is not necessary, it would be
> easy to add support for 4, 3, 2 and 1 ms.
>
> By the way, it was really easy to create a protocol for CELT over DAB
> because this codec offers great choices for the frame size and
> bitrate. Moreover, the availability of CBR was the most useful
> property because the underlying channel is constant bitrate.
>
> Pascal
>
> 2010/5/18 Jean-Marc Valin <Jean-Marc.Valin at usherbrooke.ca>:
> > Hi,
> >
> > What frame size are you using to get 24 ms "chunks"? I assume that's not
> 9*2.5
> > ms, right?
> >
> >   Jean-Marc
> >
> > Quoting Pascal Charest <c.lacsap at gmail.com>:
> >
> >> Hi Jean-Marc,
> >>
> >> DAB frame size is based on MPEG1/2 audio, which is 24ms. As such, any
> >> 24ms compatible frame size would keep the CELT over DAB framing easier
> >> (e.g. 24, 12, 8, 6, ... ms).
>
>