概要
新しいOpus audio codecとAAC-LCの音質比較。
2012年9月時点で最新のtfsel5(libopus 0.9.11-146-gdc4f83b-exp_analysis)と古いバージョン(CELT)の0.11.2、AACは定評のあるApple製エンコーダーをqaac経由で、CVBRとTVBRを比較。
結果
AAC 100kbps(tvbr,cvbr) ≒ Celt 100kbps ≒ Opus 100kbps > Opus 75kbps ≒ Celt 75kbps > AAC 75kbps(tvbr,cvbr)
評価
エンコーダ | Opus | Celt | qaac | qaac | Opus | Celt | qaac | qaac | |
---|---|---|---|---|---|---|---|---|---|
リリース年 | 2012 | 2011 | 2012 | 2012 | 2012 | 2011 | 2012 | 2012 | |
バージョン | 0.9.11 | 0.11.2 | 1.40 | 1.40 | 0.9.11 | 0.11.2 | 1.40 | 1.40 | |
フォーマット | Opus | Opus | AAC | AAC | Opus | Opus | AAC | AAC | |
ビットレート | 66k | 75k | 72k | 27 | 90k | 100k | 96k | 45 | |
41_30sec | 打楽器 | 3.1 | 3.1 | 2.5 | 2.8 | 3.5 | 3.8 | 3.7 | 3.8 |
finalfantasy | 撥弦楽 | 3.8 | 3.0 | 2.7 | 2.8 | 4.1 | 3.8 | 4.0 | 3.9 |
ATrain | ジャズ | 2.8 | 2.6 | 3.0 | 3.0 | 3.6 | 3.3 | 4.1 | 3.9 |
BigYellow | POPS | 2.7 | 3.2 | 2.3 | 2.3 | 3.3 | 3.8 | 3.6 | 3.7 |
FloorEssence | テクノ | 4.0 | 3.4 | 2.9 | 2.9 | 4.4 | 3.9 | 3.6 | 3.6 |
macabre | オケ | 2.6 | 2.6 | 2.8 | 2.8 | 3.3 | 3.2 | 4.0 | 3.9 |
mybloodrusts | 弦楽器 | 3.4 | 4.0 | 3.0 | 3.2 | 3.8 | 4.5 | 3.7 | 3.8 |
Quizas | ラテン | 3.5 | 3.5 | 2.9 | 2.8 | 3.8 | 4.1 | 4.1 | 4.2 |
VelvetRealm | テクノ | 3.0 | 2.7 | 3.6 | 3.5 | 3.3 | 3.5 | 4.0 | 3.8 |
雨降花 | POPS | 3.1 | 3.4 | 2.8 | 2.6 | 3.8 | 3.8 | 4.2 | 4.0 |
Trust | Gosp | 3.3 | 3.1 | 2.6 | 2.6 | 3.8 | 3.4 | 3.5 | 3.5 |
Waiting | ロック | 3.8 | 3.4 | 2.8 | 3.0 | 4.1 | 3.8 | 3.8 | 3.9 |
Experiencia | ラテン | 3.6 | 3.3 | 2.6 | 2.7 | 4.3 | 4.0 | 3.8 | 3.6 |
HeartToHeart | POPS | 3.1 | 3.4 | 2.8 | 2.6 | 3.7 | 3.7 | 3.9 | 3.8 |
Tom's Diner | 女声 | 3.4 | 3.5 | 2.9 | 2.9 | 3.7 | 4.0 | 3.8 | 3.9 |
ReunionBlues | ジャズ | 3.3 | 3.3 | 2.8 | 2.8 | 3.7 | 3.9 | 3.9 | 3.8 |
French | 男女声 | 3.6 | 3.8 | 3.3 | 3.3 | 3.6 | 4.0 | 3.7 | 3.7 |
undelete | POPS | 3.7 | 3.3 | 3.3 | 3.3 | 3.9 | 3.7 | 4.1 | 4.0 |
Dimmu Borgir | メタル | 3.1 | 3.6 | 3.2 | 3.0 | 3.7 | 3.8 | 4.1 | 3.9 |
Run up | POPS | 3.7 | 4.1 | 3.0 | 2.9 | 4.1 | 4.3 | 3.8 | 3.6 |
↑音源 | 平均点 | 3.31 | 3.30 | 2.88 | 2.87 | 3.76 | 3.79 | 3.85 | 3.81 |
実レート | 75k | 75k | 77k | 73k | 100k | 100k | 102k | 99k | |
全サイズ(KB) | 4388 | 4403 | 4499 | 4241 | 5893 | 5878 | 5994 | 5782 | |
エンコーダ | Opus | Celt | qaac | qaac | Opus | Celt | qaac | qaac |
テストに利用した音源を試聴したい方、ダウンロードしたい方、ログを見たい方はこちらへ。
http://zak.s206.xrea.com/bitratetest/main.htm
方法
銘柄に対する先入観が影響しないように、PSP abc/hr v2.3とRP-HT560を利用して、6個の音声ファイルをランダムに並び替えて、銘柄を伏せた状態で聴いて採点した。1.0=音質劣化が非常に気になる 2.0=気になる 3.0=わずかに気になる 4.0=原音からの音質変化が分かるが、気にならない 5.0=音質変化がわからない、区別できない。4.9点以下の評点をつける場合は、ABXYテストを15回行い、12回以上(これ以上の成績をまぐれで出す確率は約2%)正解して、違いを聞き取れることを確認してからそうした。同じテストを、RP-HJE150でもう一度行い、2評点の平均をとった。
このテストでの採点は、20(音源)×8(エンコーダ)×2(回)=320(回)。
使用したオプション
opusenc --bitrate 66 input.wav output.wav celtenc input.48k.raw --bitrate 75 --comp 10 output.wav qaac --cvbr 72 -o output.m4a input.wav qaac --tvbr 27 -o output.m4a input.wav opusenc --bitrate 90 input.wav output.wav celtenc input.48k.raw --bitrate 100 --comp 10 output.wav qaac --cvbr 96 -o output.m4a input.wav qaac --tvbr 45 -o output.m4a input.wav
使用したオプション(フル)
echo ===================Opus Section Start(75k)=================== bin\opus-tools_exp_tfsel5\opusenc --bitrate 66 "%InputWavFile%" "%OutputFile%%Opus75Name%" bin\opus-tools_exp_tfsel5\opusdec "%OutputFile%%Opus75Name%" "%TemporaryFile%.o75.wav" bin\sox "%TemporaryFile%.o75.wav" -b 32 -e float "%Opus75Decode%" gain -1 rate -v 44100 echo ===================Celt Section Start(75k)=================== bin\sox %InputWavFile% "%TemporaryFile%.48k.wav" gain -1 rate 48000 dither -s bin\celt-0.11.2-win32\celtenc "%TemporaryFile%.48k.wav" --bitrate 75 --comp 10 "%OutputFile%%Celt75Name%" bin\celt-0.11.2-win32\celtdec "%OutputFile%%Celt75Name%" "%TemporaryFile%.c75.wav" bin\sox "%TemporaryFile%.c75.wav" -b 32 -e float "%Celt75Decode%" rate -v 44100 echo ===================Aac Section Start(75k)=================== bin\qaac_1.40\qaac --cvbr 72 -o "%OutputFile%%Aaccv75Name%" "%InputWavFile%" bin\faad -b 4 -o "%Aaccv75Decode%" "%OutputFile%%Aaccv75Name%" bin\qaac_1.40\qaac --tvbr 27 -o "%OutputFile%%Aactv75Name%" "%InputWavFile%" bin\faad -b 4 -o "%Aactv75Decode%" "%OutputFile%%Aactv75Name%" echo ===================Opus Section Start(100k)=================== bin\opus-tools_exp_tfsel5\opusenc --bitrate 90 "%InputWavFile%" "%OutputFile%%Opus100Name%" bin\opus-tools_exp_tfsel5\opusdec "%OutputFile%%Opus100Name%" "%TemporaryFile%.o100.wav" bin\sox "%TemporaryFile%.o100.wav" -b 32 -e float "%Opus100Decode%" gain -1 rate -v 44100 echo ===================Celt Section Start(100k)=================== bin\sox %InputWavFile% "%TemporaryFile%.48k.wav" gain -1 rate 48000 dither -s bin\celt-0.11.2-win32\celtenc "%TemporaryFile%.48k.wav" --bitrate 100 --comp 10 "%OutputFile%%Celt100Name%" bin\celt-0.11.2-win32\celtdec "%OutputFile%%Celt100Name%" "%TemporaryFile%.c100.wav" bin\sox "%TemporaryFile%.c100.wav" -b 32 -e float "%Celt100Decode%" rate -v 44100 echo ===================Aac Section Start(100k)=================== bin\qaac_1.40\qaac --cvbr 96 -o "%OutputFile%%Aaccv100Name%" "%InputWavFile%" bin\faad -b 4 -o "%Aaccv100Decode%" "%OutputFile%%Aaccv100Name%" bin\qaac_1.40\qaac --tvbr 45 -o "%OutputFile%%Aactv100Name%" "%InputWavFile%" bin\faad -b 4 -o "%Aactv100Decode%" "%OutputFile%%Aactv100Name%"
詳細な優劣の分析
FRIEDMAN version 1.24 (Jan 17, 2002) http://ff123.net/ Blocked ANOVA analysis Number of listeners: 20 Critical significance: 0.05 Significance of data: 0.00E+000 (highly significant) --------------------------------------------------------------- ANOVA Table for Randomized Block Designs Using Ratings Source of Degrees Sum of Mean variation of Freedom squares Square F p Total 159 37.82 Testers (blocks) 19 4.43 Codecs eval'd 7 23.92 3.42 48.00 0.00E+000 Error 133 9.47 0.07 --------------------------------------------------------------- Fisher's protected LSD for ANOVA: 0.167 Means: cvbr100k tvbr100k celt100k opus100k opus_75k celt_75k cvbr_75k tvbr_75k 3.85 3.80 3.79 3.76 3.31 3.29 2.88 2.87 ---------------------------- p-value Matrix --------------------------- tvbr100k celt100k opus100k opus_75k celt_75k cvbr_75k tvbr_75k cvbr100k 0.636 0.516 0.302 0.000* 0.000* 0.000* 0.000* tvbr100k 0.859 0.574 0.000* 0.000* 0.000* 0.000* celt100k 0.701 0.000* 0.000* 0.000* 0.000* opus100k 0.000* 0.000* 0.000* 0.000* opus_75k 0.836 0.000* 0.000* celt_75k 0.000* 0.000* cvbr_75k 0.953 ----------------------------------------------------------------------- cvbr100k is better than opus_75k, celt_75k, cvbr_75k, tvbr_75k tvbr100k is better than opus_75k, celt_75k, cvbr_75k, tvbr_75k celt100k is better than opus_75k, celt_75k, cvbr_75k, tvbr_75k opus100k is better than opus_75k, celt_75k, cvbr_75k, tvbr_75k opus_75k is better than cvbr_75k, tvbr_75k celt_75k is better than cvbr_75k, tvbr_75k
整形済みデータ
% Opus, AAC 75kbps, 100kbps ABC/HR Score opus_75k celt_75k cvbr_75k tvbr_75k opus100k celt100k cvbr100k tvbr100k %features 6 75kbps 75kbps 75kbps 75kbps 100kbps 100kbps 100kbps 100kbps %features 7 OPUS OPUS AAC-LC AAC-LC OPUS OPUS AAC-LC AAC-LC 3.050 3.100 2.500 2.750 3.500 3.750 3.700 3.800 3.750 2.950 2.700 2.750 4.050 3.800 4.000 3.950 2.800 2.550 3.000 3.000 3.600 3.250 4.050 3.900 2.700 3.150 2.350 2.300 3.350 3.800 3.600 3.700 4.000 3.400 2.850 2.850 4.350 3.900 3.550 3.550 2.600 2.550 2.800 2.800 3.350 3.150 3.950 3.900 3.400 3.950 3.000 3.200 3.850 4.500 3.700 3.800 3.450 3.500 2.900 2.800 3.850 4.050 4.050 4.150 2.950 2.700 3.550 3.450 3.250 3.450 4.000 3.850 3.100 3.400 2.750 2.600 3.800 3.850 4.150 4.000 3.350 3.100 2.600 2.600 3.750 3.400 3.450 3.500 3.750 3.350 2.800 2.950 4.050 3.750 3.800 3.850 3.550 3.300 2.600 2.650 4.250 3.950 3.750 3.600 3.100 3.350 2.750 2.550 3.650 3.700 3.850 3.800 3.400 3.450 2.900 2.900 3.650 3.950 3.750 3.900 3.250 3.300 2.750 2.800 3.650 3.850 3.950 3.750 3.600 3.800 3.300 3.300 3.550 4.000 3.650 3.700 3.700 3.350 3.300 3.300 3.900 3.650 4.100 4.000 3.100 3.600 3.150 3.000 3.700 3.800 4.100 3.850 3.650 4.050 3.000 2.900 4.050 4.250 3.750 3.550
エンコード・デコードのログ
===================Processing Wav File "D:\autoencode2\10xh_.wav"=================== ===================Opus Section Start(75k)=================== Encoding using libopus 0.9.11-146-gdc4f83b-exp_analysis (audio) ----------------------------------------------------- Input: 44.1kHz 2 channels Output: 2 channels (2 coupled) 20ms packets, 66kbit/sec VBR Preskip: 356 [|] 00:00:00.02 2e+004x realtime, 69.02kbit/s1 1 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 0 0 1 1 1 1 0 0 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 1 1 0 1 0 0 0 0 0 1 0 0 0 1 0 0 0 0 0 1 0 0 0 0 0 0 0 0 1 1 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 1 1 0 0 0 0 1 1 0 0 0 0 0 0 0 0 0 0 0 0 1 1 0 0 0 0 0 1 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 1 1 0 0 0 0 1 0 0 0 0 0 0 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 0 0 0 0 0 0 0 0 0 0 1 1 0 0 0 0 0 0 0 0 0 0 0 1 1 1 0 0 0 0 0 0 0 0 0 0 0 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 1 1 0 0 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0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 0 0 0 0 0 0 0 0 0 0 1 1 0 0 0 0 0 0 0 1 0 0 0 0 1 1 0 0 0 0 0 0 0 0 0 0 0 0 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 0 0 0 0 0 0 0 0 0 0 1 1 0 0 0 0 0 0 0 0 0 0 0 0 1 1 0 1 0 0 0 0 0 0 0 0 0 0 1 1 0 0 0 0 0 0 0 1 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 1 1 1 0 0 0 0 1 1 0 0 0 0 0 0 0 0 1 1 0 0 0 0 0 0 0 0 0 0 1 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 1 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 0 0 0 0 0 0 0 0 0 0 1 1 1 1 0 1 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 1 0 0 1 1 0 0 0 0 0 0 0 0 0 0 1 0 1 1 0 1 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 1 0 0 1 0 0 0 0 0 0 0 0 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 0 0 0 0 0 0 0 0 0 0 1 1 1 0 0 0 0 1 0 0 0 0 0 0 1 1 1 0 0 1 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 0 0 0 1 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 1 1 0 0 0 0 0 0 0 0 0 0 0 0 1 1 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 1 1 0 0 0 0 0 0 1 1 0 0 0 0 0 0 0 0 0 0 0 0 1 1 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 0 0 0 0 0 0 0 0 0 0 1 1 1 0 0 0 0 1 0 0 0 0 0 0 1 1 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 [|] 00:00:21.23 21.2x realtime, 68.74kbit/s0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 1 1 1 1 1 0 0 0 0 1 0 0 0 0 0 0 0 1 1 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 0 0 0 0 0 0 0 0 0 0 0 0 1 1 0 0 0 0 0 0 0 0 0 0 1 1 1 1 0 0 0 0 1 0 0 0 0 0 1 1 0 0 0 0 1 0 0 0 0 0 0 0 0 0 1 1 0 0 0 0 0 0 0 1 0 0 0 0 1 1 0 0 0 0 0 0 0 0 0 0 1 1 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 1 1 0 0 0 0 0 0 0 0 0 0 0 0 1 1 0 0 0 0 1 1 0 0 0 0 1 1 1 1 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 1 0 1 1 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 0 1 0 0 0 0 0 1 0 0 0 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 1 0 1 1 0 0 0 0 0 0 0 0 0 0 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 0 0 0 0 0 0 0 0 0 0 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 0 0 0 0 0 0 0 0 0 0 0 0 1 1 0 0 0 0 0 1 0 0 0 0 0 0 1 1 0 0 0 0 0 0 0 0 0 0 1 1 0 0 0 0 0 0 1 1 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 0 0 0 0 0 1 0 0 0 0 1 1 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 1 0 0 0 0 0 1 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 1 0 0 0 0 1 0 0 0 0 0 0 0 0 1 1 1 1 0 0 0 0 0 0 0 0 0 0 1 1 0 0 0 0 0 0 0 0 0 0 1 1 1 1 0 0 0 0 1 0 0 0 0 0 0 0 1 1 0 0 0 0 0 0 0 0 0 0 0 0 1 1 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 1 0 0 1 0 0 1 1 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 0 0 0 0 0 0 0 0 0 0 1 0 1 0 0 0 0 0 0 0 0 0 0 0 1 1 0 0 0 0 0 0 0 0 0 0 0 0 1 0 1 1 0 0 0 0 0 0 0 0 0 0 1 1 0 0 0 0 1 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 1 0 1 1 0 0 0 0 0 0 0 1 0 0 0 1 1 1 0 0 0 0 0 0 0 0 0 1 1 1 0 0 0 0 0 1 0 0 0 0 0 0 1 1 1 0 0 0 1 1 Encoding complete ----------------------------------------------------- Encoded: 30.02 seconds Runtime: 1 seconds (30.02x realtime) Wrote: 286309 bytes, 1501 packets, 33 pages Bitrate: 75.5603kbit/s (without overhead) Rate range: 45.2kbit/s to 132kbit/s (113 to 330 bytes per packet) Overhead: 0.967% (container+metadata) Decoding to 44100 Hz (2 channels) Encoded with libopus 0.9.11-146-gdc4f83b-exp_analysis ENCODER=opusenc from opus-tools 0.1.4-5-gc9d0ef5 Decoding complete. ===================Celt Section Start(75k)=================== bin\sox WARN rate: rate clipped 6 samples; decrease volume? bin\sox WARN dither: dither clipped 3 samples; decrease volume? Encoding 48 kHz stereo audio in 20ms packets at 75.000kbit/sec (1275 bytes per packet maximum) with bitstream version -2147483632 Average rate 74.397kbit/sec, 321 peak bytes per packet Decoding 48000 Hz audio in (stereo) Encoded with CELT 0.11.2 (bitstream: -2147483632) bin\sox WARN rate: rate clipped 3 samples; decrease volume? bin\sox WARN sox: `sound_raw\10xh_.celt0112_75k.oga.f32b.wav' output clipped 2 samples; decrease volume? ===================Aac Section Start(75k)=================== qaac 1.40, CoreAudioToolbox 7.9.7.9 10xh_.wav AAC-LC Encoder, CVBR 72kbps, Quality 96 [100.0%] 0:30.000/0:30.000 (43.7x), ETA 0:00.000 1323001/1323001 samples processed in 0:00.687 Overall bitrate: 79.0504kbps *********** Ahead Software MPEG-4 AAC Decoder V2.7 ****************** Build: Jun 14 2010 Copyright 2002-2004: Ahead Software AG http://www.audiocoding.com Floating point version This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License. ************************************************************************** sound_out\10xh_.qa40_cv72.m4a file info: LC AAC 30.040 secs, 2 ch, 44100 Hz tool: qaac 1.40, CoreAudioToolbox 7.9.7.9, AAC-LC Encoder, CVBR 72kbps, Quality 96 iTunSMPB: 00000000 00000840 000003C7 0000000000142FF9 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 --------------------- | Config: 2 Ch | --------------------- | Ch | Position | --------------------- | 00 | Left front | | 01 | Right front | --------------------- Decoding sound_out\10xh_.qa40_cv72.m4a took: 0.31 sec. 96.28x real-time. qaac 1.40, CoreAudioToolbox 7.9.7.9 10xh_.wav AAC-LC Encoder, TVBR q27, Quality 96 [100.0%] 0:30.000/0:30.000 (44.7x), ETA 0:00.000 1323001/1323001 samples processed in 0:00.671 Overall bitrate: 83.2438kbps *********** Ahead Software MPEG-4 AAC Decoder V2.7 ****************** Build: Jun 14 2010 Copyright 2002-2004: Ahead Software AG http://www.audiocoding.com Floating point version This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License. ************************************************************************** sound_out\10xh_.qa40_tv27.m4a file info: LC AAC 30.040 secs, 2 ch, 44100 Hz tool: qaac 1.40, CoreAudioToolbox 7.9.7.9, AAC-LC Encoder, TVBR q27, Quality 96 iTunSMPB: 00000000 00000840 000003C7 0000000000142FF9 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 --------------------- | Config: 2 Ch | --------------------- | Ch | Position | --------------------- | 00 | Left front | | 01 | Right front | --------------------- Decoding sound_out\10xh_.qa40_tv27.m4a took: 0.30 sec. 101.15x real-time. ===================Opus Section Start(100k)=================== Encoding using libopus 0.9.11-146-gdc4f83b-exp_analysis (audio) ----------------------------------------------------- Input: 44.1kHz 2 channels Output: 2 channels (2 coupled) 20ms packets, 90kbit/sec VBR Preskip: 356 [/] 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0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 0 0 0 0 0 0 0 0 0 0 0 0 1 1 0 0 0 0 0 1 0 0 0 0 0 0 1 1 0 0 0 0 0 0 0 0 0 0 1 1 0 0 0 0 0 0 1 1 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 0 0 0 0 0 1 0 0 0 0 1 1 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 1 0 0 0 0 0 1 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 1 0 0 0 0 1 0 0 0 0 0 0 0 0 1 1 1 1 0 0 0 0 0 0 0 0 0 0 1 1 0 0 0 0 0 0 0 0 0 0 1 1 1 1 0 0 0 0 1 0 0 0 0 0 0 0 1 1 0 0 0 0 0 0 0 0 0 0 0 0 1 1 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 1 0 0 1 0 0 1 1 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 0 0 0 0 0 0 0 0 0 0 1 0 1 0 0 0 0 0 0 0 0 0 0 0 1 1 0 0 0 0 0 0 0 0 0 0 0 0 1 0 1 1 0 0 0 0 0 0 0 0 0 0 1 1 0 0 0 0 1 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 1 0 1 1 0 0 0 0 0 0 0 1 0 0 0 1 1 1 0 0 0 0 0 0 0 0 0 1 1 1 0 0 0 0 0 1 0 0 0 0 0 0 1 1 1 0 0 0 1 1 Encoding complete ----------------------------------------------------- Encoded: 30.02 seconds Runtime: 1 seconds (30.02x realtime) Wrote: 388799 bytes, 1501 packets, 33 pages Bitrate: 102.809kbit/s (without overhead) Rate range: 64kbit/s to 180kbit/s (160 to 450 bytes per packet) Overhead: 0.774% (container+metadata) Decoding to 44100 Hz (2 channels) Encoded with libopus 0.9.11-146-gdc4f83b-exp_analysis ENCODER=opusenc from opus-tools 0.1.4-5-gc9d0ef5 Decoding complete. ===================Celt Section Start(100k)=================== bin\sox WARN rate: rate clipped 6 samples; decrease volume? bin\sox WARN dither: dither clipped 3 samples; decrease volume? Encoding 48 kHz stereo audio in 20ms packets at 100.000kbit/sec (1275 bytes per packet maximum) with bitstream version -2147483632 Average rate 99.708kbit/sec, 430 peak bytes per packet Decoding 48000 Hz audio in (stereo) Encoded with CELT 0.11.2 (bitstream: -2147483632) ===================Aac Section Start(100k)=================== qaac 1.40, CoreAudioToolbox 7.9.7.9 10xh_.wav AAC-LC Encoder, CVBR 96kbps, Quality 96 [100.0%] 0:30.000/0:30.000 (42.7x), ETA 0:00.000 1323001/1323001 samples processed in 0:00.702 Overall bitrate: 108.723kbps *********** Ahead Software MPEG-4 AAC Decoder V2.7 ****************** Build: Jun 14 2010 Copyright 2002-2004: Ahead Software AG http://www.audiocoding.com Floating point version This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License. ************************************************************************** sound_out\10xh_.qa40_cv96.m4a file info: LC AAC 30.040 secs, 2 ch, 44100 Hz tool: qaac 1.40, CoreAudioToolbox 7.9.7.9, AAC-LC Encoder, CVBR 96kbps, Quality 96 iTunSMPB: 00000000 00000840 000003C7 0000000000142FF9 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 --------------------- | Config: 2 Ch | --------------------- | Ch | Position | --------------------- | 00 | Left front | | 01 | Right front | --------------------- Decoding sound_out\10xh_.qa40_cv96.m4a took: 0.30 sec. 101.49x real-time. qaac 1.40, CoreAudioToolbox 7.9.7.9 10xh_.wav AAC-LC Encoder, TVBR q45, Quality 96 [100.0%] 0:30.000/0:30.000 (40.9x), ETA 0:00.000 1323001/1323001 samples processed in 0:00.734 Overall bitrate: 111.509kbps *********** Ahead Software MPEG-4 AAC Decoder V2.7 ****************** Build: Jun 14 2010 Copyright 2002-2004: Ahead Software AG http://www.audiocoding.com Floating point version This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License. ************************************************************************** sound_out\10xh_.qa40_tv45.m4a file info: LC AAC 30.040 secs, 2 ch, 44100 Hz tool: qaac 1.40, CoreAudioToolbox 7.9.7.9, AAC-LC Encoder, TVBR q45, Quality 96 iTunSMPB: 00000000 00000840 000003C7 0000000000142FF9 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 --------------------- | Config: 2 Ch | --------------------- | Ch | Position | --------------------- | 00 | Left front | | 01 | Right front | --------------------- Decoding sound_out\10xh_.qa40_tv45.m4a took: 0.30 sec. 101.15x real-time. ===================Rawgene2 Section Start=================== rawgene v.2.0.0 / original reference file:sound_raw\10xh_.original.f32b.wav Offset[sample] Gain Gain[dB] Score FLO 1>10xh_.opust014> O: 0 G: 1.109189 G: 0.900114 S: 0.416530 FLO 2>10xh_.celt0112> O: 0 G: 1.121005 G: 0.992154 S: 0.349920 FLO 3>10xh_.qa40_cv7> O: 1088 G: 1.005395 G: 0.046732 S: 0.279179 FLO 4>10xh_.qa40_tv2> O: 1088 G: 1.005395 G: 0.046732 S: 0.279179 FLO 5>10xh_.opust014> O: 0 G: 1.121764 G: 0.998028 S: 0.352620 FLO 6>10xh_.celt0112> O: 0 G: 1.125816 G: 1.029351 S: 0.276586 FLO 7>10xh_.qa40_cv9> O: 1088 G: 1.012118 G: 0.104624 S: 0.215851 FLO 8>10xh_.qa40_tv4> O: 1088 G: 1.012118 G: 0.104624 S: 0.215851 biggest_delay : 1088 smallest_delay : 0 biggest_gain : 1.125816 shortest_sample : 1321913 initial_offset : 7126
注:公開試聴試験での多人数の平均評点と管理人の評点が似たような傾向になることは確認しているので言えるが、ある個人がある再生環境で、ある価値観のもとに聞いたときの評価が、ここに書いた管理人の評価に似るかどうかまでは何とも言えない。また、今回利用した音源とは傾向の異なる音を多くエンコードした場合、結果や順位が異なる可能性があります。