Deliver High Quality High Performance HEVC via Intel® Media Server Studio

Next, Media Server Studio HEVC Software Encoder in each of its 3 main modes: TU1, TU4, and TU7 is
utilized to perform encoding of each test sequence with each of 4 quantizers (of Table 15) used in HM 14
encoding, and PSNRs of Y, U, and V, and total bitrates are collected for each test.
UHD4k Test
Sequence
Table 16 PSNR Y, and Total Bitrate for each of 4 QPs by HM 14 Codec on 4:2:2 10-bit UHD4K Test set
Qp1 PSNR, Bitrate, Qp2 PSNR, Bitrate, Qp3 PSNR, Bitrate, Qp4 PSNR, Bitrate,
dB Y kbps dB Y kbps dB Y kbps dB Y kbps
1 FastWalk 48.11 38231.4 44.71 16403.4 41.61 7585.5 38.80 3938.2
2 Footbridge 47.90 8496.9 44.86 3429.7 41.69 1542.9 38.65 740.6
3 Venetian_Crossing 44.91 36959.6 42.25 10349.2 39.64 4177.3 36.78 2076.0
For Media Server Studio HEVC codec in each encoding mode, the 4 collected bitrates and corresponding 4
PSNRs (each corresponding to one Qp) are used in curve fitting to generate a continuous RD curve for
each encoding mode. Further, for each test sequence and for each Media Server Studio TU mode, the
corresponding Media Server Studio RD curve is compared to HM14 RD curve and a BD rate percentage is
computed that reflects the difference in quality between specific Media Server Studio TU mode with
respect to HM14 reference. The BD rate provides a measure of departure of Media Server Studio TU
mode’s quality in percentage bits with respect to the HM14 reference.
Table 17 shows the measured BD rate percentage bitrate for each of luma and chroma components for
each test sequence of Table 16 for each of 3 TU modes being evaluated. Fig. 21A-21B compares the RD
characteristics of two codecs on the UHD4K test set for TU1 and TU4 modes where the difference in
quality is the highest and the lowest wrt HM14 reference.
For instance, Table 17 shows on UHD4K test set, the BD rate percentage difference of Media Server
Studio HEVC in various TU modes wrt HM14 reference. As can be observed on UHD4K test set, the
average luma BD rate percentage difference of Media Server Studio HEVC Codec over HM14 (an ideal
reference), is 8.3%, 18.2%, and 28.6%, higher respectively in TU1, TU4, and TU7 modes. This means that for
UHD4K test set, the Media Server Studio codec as compared to HM14, requires around 8% higher bitrate
in TU1 mode, 18% higher bitrate in TU4 mode, and 29% higher bitrate in TU7 mode to achieve the same
luma PSNR quality as HM14.
Table 17 Relative Quality Evaluation Results on 4:2:2 10-bit UHD4K test set for Intel® Media Server Studio HEVC
Software Codec in TU1, TU4, and TU7 modes with respect to MPEG HEVC HM14 Codec
UHD4K Test
Sequence
TU1 BD rate, %age TU4 BD rate, %age TU7 BD rate, %age
Y U V Y U V Y U V
1 FastWalk 9.32 -4.87 -2.44 20.31 1.97 3.97 30.58 32.59 29.85
2 Footbridge 5.62 -2.87 -3.66 16.80 20.63 14.05 27.63 43.79 47.56
3 Venetian_crossing 10.0 5.31 5.05 17.38 11.92 10.95 27.54 36.61 35.94
Average 98.34 -0.81 -0.35 18.17 11.51 9.66 28.58 37.66 37.78
Deliver High Quality, High Performance HEVC via Intel® Media Server Studio
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