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<strong>Quality</strong> Evaluation Results for 4:2:0 10-bit Content<br />
Before discussing detailed BD rate differences of each <strong>Media</strong> <strong>Server</strong> <strong>Studio</strong> TU mode wrt HM14, we first<br />
establish the quality/bitrate tradeoff of HM 14 that will be used as reference.<br />
UHD1600p Test<br />
Sequence<br />
First, each video sequence of each test set (such as UHD1600p, HD1080p) is encoded using MPEG <strong>HEVC</strong><br />
HM14 Reference Encoder with each of 4 quantizers as specified in Tables 7A-7B. The overall PSNR<br />
(averaged over frames) for each test sequence for each Qp for each of luma (Y), and associated chroma<br />
components (U and V) is collected along with the generated coding bitrate. For instance, Tables 8A-8B<br />
show the luma PSNR (chroma PSNR is also collected but is not shown to keep tables manageable in size)<br />
and total bitrate for each test sequence for each of 4 Qps is collected and is used in curve fitting to<br />
generate a continuous RD curve for HM14 encoding of that test sequence.<br />
Next, <strong>Media</strong> <strong>Server</strong> <strong>Studio</strong> <strong>HEVC</strong> Software Encoder in each of its 3 main modes: TU1, TU4, and TU7 is<br />
utilized to perform encoding of each test sequence with each of 4 quantizers (of Table 7A-7B) used in HM<br />
14 encoding, and PSNRs of Y, U, and V, and total bitrates are collected for each test.<br />
Table 8A PSNR Y, and Total Bitrate for each of 4 QPs by HM 14 Codec on 4:2:0 10-bit UHD1600p Test set<br />
Qp1 PSNR, Bitrate, Qp2 PSNR, Bitrate, Qp3 PSNR, Bitrate, Qp4 PSNR, Bitrate,<br />
dB Y kbps dB Y kbps dB Y kbps dB Y kbps<br />
1 Nebuta_Festival 30.77 48676.1 28.96 19640.4 28.11 8011.4 27.55 3678.2<br />
2 SteamLocomotive 41.53 22431.0 40.04 5523.4 38.84 2232.8 37.07 1066.4<br />
3 ReadySetGo 41.78 24443.7 40.04 11730.2 37.80 6343.4 35.31 3663.6<br />
HD1080p Test<br />
Sequence<br />
Table 8B PSNR Y, and Total Bitrate for each of 4 QPs by HM 14 Codec on 4:2:0 10-bit HD1080p Test set<br />
Qp1 PSNR, Bitrate, Qp2 PSNR, Bitrate, Qp3 PSNR, Bitrate, Qp4 PSNR, Bitrate,<br />
dB Y kbps dB Y kbps dB, Y kbps dB, Y kbps<br />
1 CrowdRun 35.13 25614.2 32.62 13979.3 30.24 7652.9 28.13 4301.7<br />
2 ParkScene 39.59 6432.6 37.98 3467.1 36.37 2064.3 34.73 1195.5<br />
3 Seeking 37.29 40340.7 34.92 12963.8 32.60 5528.0 30.20 2556.7<br />
For <strong>Media</strong> <strong>Server</strong> <strong>Studio</strong> <strong>HEVC</strong> codec in each encoding mode, the 4 collected bitrates and corresponding 4<br />
PSNRs (each corresponding to one Qp) are used in curve fitting to generate a continuous RD curve for<br />
each encoding mode. Further, for each test sequence and for each <strong>Media</strong> <strong>Server</strong> <strong>Studio</strong> TU mode, the<br />
corresponding <strong>Media</strong> <strong>Server</strong> <strong>Studio</strong> RD curve is compared to HM14 RD curve and a BD rate percentage is<br />
computed that reflects the difference in quality between specific <strong>Media</strong> <strong>Server</strong> <strong>Studio</strong> TU mode with<br />
respect to HM14 reference. The BD rate provides a measure of departure of <strong>Media</strong> <strong>Server</strong> <strong>Studio</strong> TU<br />
mode’s quality in percentage bits with respect to the HM14 reference.<br />
<strong>Deliver</strong> <strong>High</strong> <strong>Quality</strong>, <strong>High</strong> <strong>Performance</strong> <strong>HEVC</strong> <strong>via</strong> <strong>Intel®</strong> <strong>Media</strong> <strong>Server</strong> <strong>Studio</strong><br />
Table 8A-8B show the measured BD rate percentage bitrate for each of luma and chroma components for<br />
each test sequence of each test set of Table 7A-7B for each of 3 TU modes being evaluated. Fig. 14A1-14B2<br />
compares the RD characteristics of two codecs for each test set for TU1 and TU4 modes where the<br />
difference in quality is the highest and the lowest wrt HM14 reference.<br />
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