[FFmpeg-devel] [PATCH V2 1/2] avcodec/vorbisenc: Add pre-echo detection

[Tyler Jones]

On Mon, Jul 17, 2017 at 09:17:09AM -0600, Tyler Jones wrote:
> The encoder will attempt to determine the existence of transient
> signals by applying a 4th order highpass filter to remove dominant
> low frequency waveforms. Frames are then split up into blocks
> where the variance is calculated and compared with blocks from
> the previous frame. A preecho is only likely to be noticeable when
> relatively quiet audio is followed by a loud transient signal.
> 
> Signed-off-by: Tyler Jones <tdjones879 at gmail.com>
> ---
> V2 - Properly prefix non-static functions with "ff_"
> 
>  libavcodec/Makefile    |   2 +-
>  libavcodec/vorbisenc.c |  28 +++++++--
>  libavcodec/vorbispsy.c | 153 +++++++++++++++++++++++++++++++++++++++++++++++++
>  libavcodec/vorbispsy.h |  79 +++++++++++++++++++++++++
>  4 files changed, 256 insertions(+), 6 deletions(-)

Ping for set

Tyler Jones
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 488 bytes
Desc: not available
URL: <http://ffmpeg.org/pipermail/ffmpeg-devel/attachments/20170721/9248c386/attachment.sig>