[FFmpeg-devel] ALS encoder

[Paul B Mahol]

On 3/5/18, Oleg Khokhlov <olegish at gmail.com> wrote:
> Hi all.
>
> I am student and my name is Oleg. I work on qualification task for GSoC
> 2018.
> I should implement float-point support to als encoder.

Isn't that a little too much for qualification task?

>
> A have some questions:
> 1)In documentation was written
>
> "The floating-point sequence is modeled by the sum of an integer sequence
> multiplied by a constant (ACF: Approximate Common Factor) and a
> residual sequence."
>
> and in another part was written:
>
> "If the input signal is 32-bit floating-point, input values are
> decomposed  into three
> parts: An estimated common multiplier A, a truncated integer
> multiplicand sequence Y,
> and a difference signal Z.".
>
> Can somebody explain what is ACF (I don`t find definition of this term
> in google)
> and how I can compute it?
>
> 2)What is the best method for testing encoder?
>
>
> Link to documentation.
> (https://drive.google.com/open?id=1iMqwUrhzdhWhm-IdNXx2P3djvS0wCtDt)
>
> Oleg.
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