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Simplify the video deemphasis filter generation #479

Merged
merged 1 commit into from
Apr 9, 2020
Merged

Simplify the video deemphasis filter generation #479

merged 1 commit into from
Apr 9, 2020
+21 −11

Commits on Apr 9, 2020

  1. Simplify the video deemphasis filter generation. 

    Previously this needed different hand-tuned scaling factors for PAL and
NTSC. The missing bit was pre-warping the zero/pole frequencies to match
the bilinear transform.

The resulting filter is very close to the existing one (within 0.1dB for
NTSC and 0.3dB for PAL), so this doesn't make much difference to the
output.
    @atsampson
    atsampson committed Apr 9, 2020
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