公開リスニングテストの結果 (2014年7月)
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公開リスニングテストの結果 (2014年7月)


このページは2014年に行われた マルチフォーマットのリスニングテスト結果まとめである。テストの目的は、Opus、AAC、Ogg Vorbis の 96 kbps を MP3 128 kbps と比較し、どれが音質が最も良いのかを調べることであった。

概要

♛1 Opus 1.1opus-tools-0.1.9-win32 経由
opusenc --bitrate 96 in.wav out.opus
♛2 AAC iTunes 11.2.2qaac 2.41 経由
qaac --cvbr 96 -o out.mp4 in.wav
♛3 Ogg Vorbis aoTuV Beta6.03
venc603 -q2.2 in.wav out.ogg
♛3 MP3 LAME 3.99.5
lame -V5 in.wav out.mp3 *約 29% ビットレートを多く使用

Opus、AAC、Ogg Vorbis、MP3の音質が、銘柄を伏せた公開リスニングテストで評価された。評価は標準的なABC/HR法に則って、ロスレスの原音と非可逆圧縮の音声ファイルをペアにした状態で行われた。非可逆音源の原音への忠実度は、公に集められた38名の参加者によって主観評価により採点された。35種の多様な音楽と、5種のスピーチがテスト音源として使われた。

Opusエンコーダー1.1、iTunesのAACエンコーダー、aoTuV の 96 kbps、加えて LAME の 128 kbps がテストされた。「区別できない」~「区別できるが、気にならない」という評価が最も多かった。

Opusコーデックは明確な勝者だった。Apple の iTunes でエンコードされた AAC が二位を得た。Ogg Vorbisは三位であった。他のコーデックより30kbps多くビットレートを使わせたMP3は、Ogg Vorbisと並んで三位タイとなった。

テストの前から音質の悪いことが知られていたFAAC (libfaac)は、ビリ基準として使われた。

目次

グラフの読み方

グラフは横軸に6コーデックが載せられ、縦軸に評点が与えられている。 それぞれのコーデックの平均評点は、Iの形をした線区間の中央にある点として示されている。 Iの形をした区間は、それぞれのコーデックの平均評点の、95%信頼区間を示す。

全音源の評点 (40 音源)

1 非常に 気になる 2 気になる 3 わずかに 気になる 4 気にな らない 5 区別で きない 95% 信頼区間 0.1.9-win32 iTunes 11, qaac 2.41 aoTuV b6.03 LAME 3.99.5 faac-1.28-mod from rarewares --bitrate 96 --cvbr 96 -q2.2 -V5 -b 96 -q 30 107kbps 104kbps 106kbps 136kbps 98kbps 52kbps Opus AAC Ogg MP3 FAAC 96k FAAC q30
評点 3.2 3.4 3.6 3.8 4.0 4.2 4.4 4.6 4.8 5.0 Opus AAC Ogg MP3

全音源セット (5セット×8音源)

音源名ジャンルOpus
1.1
AAC
Apple
Ogg
Vorbis
MP3
LAME
FAAC
96k
FAAC
q30
平均評点4.654.404.244.242.651.19
音源名ジャンルOpus
1.1
AAC
Apple
Ogg
Vorbis
MP3
LAME
FAAC
96k
FAAC
q30
Chrisの音源セット
SinceAlwaysGuitar4.964.864.664.422.631.33
WaitingPops4.584.494.034.292.611.07
velvetPerc.4.354.384.374.372.461.13
trumpetWind4.844.274.243.912.441.04
girlTechno4.493.243.954.082.581.24
Can't Wait Until Tonight (Dry Wurlitzer Mix)Pops4.433.773.384.582.571.06
35_SQAM_glockenspiel_cutInst.4.704.564.434.493.071.24
Robots_oldTechno4.914.534.673.612.631.06
アルバムコレクションからの音源セット
Asleep__4.11-4.31_Strings4.894.914.794.892.951.06
Greatest_Love_of_All_2min57Pops4.674.374.324.272.971.10
Hey TonightRock4.404.574.134.062.811.20
Severance__1.31-1.51_Pops4.653.954.004.282.721.37
Shinsho_pool_3min45_4min4Pops4.814.544.293.882.921.40
SlavesOfFearMetal4.914.314.854.742.851.23
The Chastising of RenegadeRock4.764.434.714.272.881.18
TrosYGaregPops4.494.254.153.962.491.24
MPEGシークエンスの音源セット
4-Sound-English-male.441Voice4.974.823.774.473.011.22
9-Have-big-expensive-car.441Pops4.714.044.284.172.591.12
12-German-male-speech.441Voice4.824.803.594.092.711.19
15-Good-evening.441Voice4.314.514.244.192.491.19
21-classic.441Classic4.694.573.963.942.891.43
24-Greensleeves-Korean-male-speech.441Voice5.004.324.234.402.921.00
25-This-is-the-end.441Voice4.894.414.204.562.701.23
27-last-song-drums-and-trampets.441Perc.4.574.343.974.062.771.00
前回2011年のAACリスニングテストからの音源セット
bonhemian_rhapsodyRock4.634.534.043.712.491.26
clapton_44kGuitar4.294.214.464.302.411.04
CoralPops4.944.504.534.622.571.29
ExitMusicVocal4.934.434.133.802.331.00
liberateMetal4.244.434.614.502.491.49
NewYorkCityPops4.804.074.134.482.381.00
sandmanRock4.934.334.404.732.661.36
take_your_finger_from_my_hairRock4.044.663.704.132.531.21
新しい HydrogeuAudio のスレッド 103989 からの音源セット
ChangesRock4.364.214.434.252.541.19
Girl_In_The_Fire__Sample_Rock4.364.504.134.032.941.10
Hotel CaliforniaRock4.814.594.134.462.731.23
Jupiter, the Bringer of JollityClassic4.484.423.804.102.731.30
Last_Of_The_Mohicanz__Sample_Electro4.684.214.674.322.271.18
Only TimeNewage4.514.694.204.192.531.11
Through The Fire And FlamesMetal4.654.484.683.912.381.51
With Love (Outro)Techno4.654.504.183.992.491.18

音源セットごとの評点

1 非常に 気になる 2 気になる 3 わずかに 気になる 4 気にな らない 5 区別で きない 0.1.9-win32 iTunes 11, qaac 2.41 aoTuV b6.03 LAME 3.99.5 faac-1.28-mod from rarewares --bitrate 96 --cvbr 96 -q2.2 -V5 -b 96 -q 30 107kbps 104kbps 106kbps 136kbps 98kbps 52kbps C C C C C C T T T T T T M M M M M M R R R R R R A A A A A A Opus AAC Ogg MP3 FAAC 96k FAAC q30
セット名Opus
1.1
AAC
Apple
Ogg
Vorbis
MP3
LAME
FAAC
96k
FAAC
q30
セット名Opus
1.1
AAC
Apple
Ogg
Vorbis
MP3
LAME
FAAC
96k
FAAC
q30
Chrisの音源セット4.664.264.224.222.621.15
アルバムコレクションからの音源セット4.704.424.414.292.821.22
MPEGシークエンスの音源セット4.754.484.034.242.761.17
前回2011年のAACリスニングテストからの音源セット4.604.394.254.282.481.21
新しい HydrogeuAudio のスレッド 103989 からの音源セット4.564.454.284.162.581.23

音源ごとの評点

1 1 2 2 3 3 4 4 5 5 Chrisの音源セット SinceAlways ギター Waiting ポップス velvet 打楽器 trumpet 管楽器 girl テクノ Can't Wait Until Tonight (Dry Wurlitzer Mix) ポップス 35_SQAM_glockenspiel_cut インスト Robots_old テクノ アルバムコレクションからの音源セット Asleep__4.11-4.31_ 弦楽器 Greatest_Love_of_All_2min57 ポップス Hey Tonight ロック Severance__1.31-1.51_ ポップス Shinsho_pool_3min45_4min4 ポップス SlavesOfFear メタル The Chastising of Renegade ロック TrosYGareg ポップス MPEGシークエンスの音源セット 4-Sound-English-male.441 スピーチ 9-Have-big-expensive-car.441 ポップス 12-German-male-speech.441 スピーチ 15-Good-evening.441 スピーチ 21-classic.441 クラシック 24-Greensleeves-Korean-male-speech.441 スピーチ 25-This-is-the-end.441 スピーチ 27-last-song-drums-and-trampets.441 打楽器 前回2011年のAACリスニングテストからの音源セット bonhemian_rhapsody ロック clapton_44k ギター Coral ポップス ExitMusic ボーカル liberate メタル NewYorkCity ポップス sandman ロック take_your_finger_from_my_hair ロック 新しい HydrogeuAudio のスレッド 103989 からの音源セット Changes ロック Girl_In_The_Fire__Sample_ ロック Hotel California ロック Jupiter, the Bringer of Jolity クラシック Last_Of_The_Mohicanz__Sample_ エレクトロ Only Time ニューエイジ Through The Fire And Flames メタル With Love (Outro) テクノ Opus AAC Ogg MP3 FAAC 96k FAAC q30

Chrisの音源セット

SinceAlways

1 Very annoying 2 Annoying 3 Slightly annoying 4 Perceptible, but not annoying 5 Impercep- tible Opus AAC Ogg MP3 FAAC 96k FAAC q30

Waiting

1 Very annoying 2 Annoying 3 Slightly annoying 4 Perceptible, but not annoying 5 Impercep- tible Opus AAC Ogg MP3 FAAC 96k FAAC q30

velvet

1 Very annoying 2 Annoying 3 Slightly annoying 4 Perceptible, but not annoying 5 Impercep- tible Opus AAC Ogg MP3 FAAC 96k FAAC q30

trumpet

1 Very annoying 2 Annoying 3 Slightly annoying 4 Perceptible, but not annoying 5 Impercep- tible Opus AAC Ogg MP3 FAAC 96k FAAC q30

girl

1 Very annoying 2 Annoying 3 Slightly annoying 4 Perceptible, but not annoying 5 Impercep- tible Opus AAC Ogg MP3 FAAC 96k FAAC q30

Can't Wait Until Tonight (Dry Wurlitzer Mix)

1 Very annoying 2 Annoying 3 Slightly annoying 4 Perceptible, but not annoying 5 Impercep- tible Opus AAC Ogg MP3 FAAC 96k FAAC q30

35_SQAM_glockenspiel_cut

1 Very annoying 2 Annoying 3 Slightly annoying 4 Perceptible, but not annoying 5 Impercep- tible Opus AAC Ogg MP3 FAAC 96k FAAC q30

Robots_old

1 Very annoying 2 Annoying 3 Slightly annoying 4 Perceptible, but not annoying 5 Impercep- tible Opus AAC Ogg MP3 FAAC 96k FAAC q30

アルバムコレクションからの音源セット

Asleep__4.11-4.31_

1 Very annoying 2 Annoying 3 Slightly annoying 4 Perceptible, but not annoying 5 Impercep- tible Opus AAC Ogg MP3 FAAC 96k FAAC q30

Greatest_Love_of_All_2min57

1 Very annoying 2 Annoying 3 Slightly annoying 4 Perceptible, but not annoying 5 Impercep- tible Opus AAC Ogg MP3 FAAC 96k FAAC q30

Hey Tonight

1 Very annoying 2 Annoying 3 Slightly annoying 4 Perceptible, but not annoying 5 Impercep- tible Opus AAC Ogg MP3 FAAC 96k FAAC q30

Severance__1.31-1.51_

1 Very annoying 2 Annoying 3 Slightly annoying 4 Perceptible, but not annoying 5 Impercep- tible Opus AAC Ogg MP3 FAAC 96k FAAC q30

Shinsho_pool_3min45_4min4

1 Very annoying 2 Annoying 3 Slightly annoying 4 Perceptible, but not annoying 5 Impercep- tible Opus AAC Ogg MP3 FAAC 96k FAAC q30

SlavesOfFear

1 Very annoying 2 Annoying 3 Slightly annoying 4 Perceptible, but not annoying 5 Impercep- tible Opus AAC Ogg MP3 FAAC 96k FAAC q30

The Chastising of Renegade

1 Very annoying 2 Annoying 3 Slightly annoying 4 Perceptible, but not annoying 5 Impercep- tible Opus AAC Ogg MP3 FAAC 96k FAAC q30

TrosYGareg

1 Very annoying 2 Annoying 3 Slightly annoying 4 Perceptible, but not annoying 5 Impercep- tible Opus AAC Ogg MP3 FAAC 96k FAAC q30

MPEGシークエンスの音源セット

4-Sound-English-male.441

1 Very annoying 2 Annoying 3 Slightly annoying 4 Perceptible, but not annoying 5 Impercep- tible Opus AAC Ogg MP3 FAAC 96k FAAC q30

9-Have-big-expensive-car.441

1 Very annoying 2 Annoying 3 Slightly annoying 4 Perceptible, but not annoying 5 Impercep- tible Opus AAC Ogg MP3 FAAC 96k FAAC q30

12-German-male-speech.441

1 Very annoying 2 Annoying 3 Slightly annoying 4 Perceptible, but not annoying 5 Impercep- tible Opus AAC Ogg MP3 FAAC 96k FAAC q30

15-Good-evening.441

1 Very annoying 2 Annoying 3 Slightly annoying 4 Perceptible, but not annoying 5 Impercep- tible Opus AAC Ogg MP3 FAAC 96k FAAC q30

21-classic.441

1 Very annoying 2 Annoying 3 Slightly annoying 4 Perceptible, but not annoying 5 Impercep- tible Opus AAC Ogg MP3 FAAC 96k FAAC q30

24-Greensleeves-Korean-male-speech.441

1 Very annoying 2 Annoying 3 Slightly annoying 4 Perceptible, but not annoying 5 Impercep- tible Opus AAC Ogg MP3 FAAC 96k FAAC q30

25-This-is-the-end.441

1 Very annoying 2 Annoying 3 Slightly annoying 4 Perceptible, but not annoying 5 Impercep- tible Opus AAC Ogg MP3 FAAC 96k FAAC q30

27-last-song-drums-and-trampets.441

1 Very annoying 2 Annoying 3 Slightly annoying 4 Perceptible, but not annoying 5 Impercep- tible Opus AAC Ogg MP3 FAAC 96k FAAC q30

前回2011年のAACリスニングテストからの音源セット

bonhemian_rhapsody

1 Very annoying 2 Annoying 3 Slightly annoying 4 Perceptible, but not annoying 5 Impercep- tible Opus AAC Ogg MP3 FAAC 96k FAAC q30

clapton_44k

1 Very annoying 2 Annoying 3 Slightly annoying 4 Perceptible, but not annoying 5 Impercep- tible Opus AAC Ogg MP3 FAAC 96k FAAC q30

Coral

1 Very annoying 2 Annoying 3 Slightly annoying 4 Perceptible, but not annoying 5 Impercep- tible Opus AAC Ogg MP3 FAAC 96k FAAC q30

ExitMusic

1 Very annoying 2 Annoying 3 Slightly annoying 4 Perceptible, but not annoying 5 Impercep- tible Opus AAC Ogg MP3 FAAC 96k FAAC q30

liberate

1 Very annoying 2 Annoying 3 Slightly annoying 4 Perceptible, but not annoying 5 Impercep- tible Opus AAC Ogg MP3 FAAC 96k FAAC q30

NewYorkCity

1 Very annoying 2 Annoying 3 Slightly annoying 4 Perceptible, but not annoying 5 Impercep- tible Opus AAC Ogg MP3 FAAC 96k FAAC q30

sandman

1 Very annoying 2 Annoying 3 Slightly annoying 4 Perceptible, but not annoying 5 Impercep- tible Opus AAC Ogg MP3 FAAC 96k FAAC q30

take_your_finger_from_my_hair

1 Very annoying 2 Annoying 3 Slightly annoying 4 Perceptible, but not annoying 5 Impercep- tible Opus AAC Ogg MP3 FAAC 96k FAAC q30

新しい HydrogeuAudio のスレッド 103989 からの音源セット

Changes

1 Very annoying 2 Annoying 3 Slightly annoying 4 Perceptible, but not annoying 5 Impercep- tible Opus AAC Ogg MP3 FAAC 96k FAAC q30

Girl_In_The_Fire__Sample_

1 Very annoying 2 Annoying 3 Slightly annoying 4 Perceptible, but not annoying 5 Impercep- tible Opus AAC Ogg MP3 FAAC 96k FAAC q30

Hotel California

1 Very annoying 2 Annoying 3 Slightly annoying 4 Perceptible, but not annoying 5 Impercep- tible Opus AAC Ogg MP3 FAAC 96k FAAC q30

Jupiter, the Bringer of Jollity

1 Very annoying 2 Annoying 3 Slightly annoying 4 Perceptible, but not annoying 5 Impercep- tible Opus AAC Ogg MP3 FAAC 96k FAAC q30

Last_Of_The_Mohicanz__Sample_

1 Very annoying 2 Annoying 3 Slightly annoying 4 Perceptible, but not annoying 5 Impercep- tible Opus AAC Ogg MP3 FAAC 96k FAAC q30

Only Time

1 Very annoying 2 Annoying 3 Slightly annoying 4 Perceptible, but not annoying 5 Impercep- tible Opus AAC Ogg MP3 FAAC 96k FAAC q30

Through The Fire And Flames

1 Very annoying 2 Annoying 3 Slightly annoying 4 Perceptible, but not annoying 5 Impercep- tible Opus AAC Ogg MP3 FAAC 96k FAAC q30

With Love (Outro)

1 Very annoying 2 Annoying 3 Slightly annoying 4 Perceptible, but not annoying 5 Impercep- tible Opus AAC Ogg MP3 FAAC 96k FAAC q30

参加者と貢献度合い (363 結果, 339 有効な結果)

kiavan92 is the top contributor.

参加者ごとの評点

1 1 2 2 3 3 4 4 5 5 kiavan92 (38) Alexxander (35) anonymous2 (35) win32vb (32) Kamedo2 (25) Steve Forte Rio (24) IgorC (21) Caspian (16) Gainless (13) Joungmin Lee (11) 2Bdecided (10) singlethread (10) Hex144 (8) anonymous9 (7) timuer (7) anonymous3 (5) anonymous5 (4) HS (4) naylor83 (4) Panther025 (4) anonymous1 (3) anonymous10 (3) psychoticmeow (3) TL (3) yourlord (3) anonymous7 (2) johnb (2) NeoteriX (2) anonymous11 (1) anonymous12 (1) anonymous4 (1) anonymous8 (1) DH (1) Opus AAC Ogg MP3 FAAC 96k FAAC q30

多くの結果を頂いた 12 名の評点

kiavan92 の評点 (38 個の結果)

1 Very annoying 2 Annoying 3 Slightly annoying 4 Perceptible, but not annoying 5 Impercep- tible Opus AAC Ogg MP3 FAAC 96k FAAC q30

Alexxander の評点 (35 個の結果)

1 Very annoying 2 Annoying 3 Slightly annoying 4 Perceptible, but not annoying 5 Impercep- tible Opus AAC Ogg MP3 FAAC 96k FAAC q30

anonymous2 の評点 (35 個の結果)

1 Very annoying 2 Annoying 3 Slightly annoying 4 Perceptible, but not annoying 5 Impercep- tible Opus AAC Ogg MP3 FAAC 96k FAAC q30

win32vb の評点 (32 個の結果)

1 Very annoying 2 Annoying 3 Slightly annoying 4 Perceptible, but not annoying 5 Impercep- tible Opus AAC Ogg MP3 FAAC 96k FAAC q30

Kamedo2 の評点 (25 個の結果)

1 Very annoying 2 Annoying 3 Slightly annoying 4 Perceptible, but not annoying 5 Impercep- tible Opus AAC Ogg MP3 FAAC 96k FAAC q30

Steve Forte Rio の評点 (24 個の結果)

1 Very annoying 2 Annoying 3 Slightly annoying 4 Perceptible, but not annoying 5 Impercep- tible Opus AAC Ogg MP3 FAAC 96k FAAC q30

IgorC の評点 (21 個の結果)

1 Very annoying 2 Annoying 3 Slightly annoying 4 Perceptible, but not annoying 5 Impercep- tible Opus AAC Ogg MP3 FAAC 96k FAAC q30

Caspian の評点 (16 個の結果)

1 Very annoying 2 Annoying 3 Slightly annoying 4 Perceptible, but not annoying 5 Impercep- tible Opus AAC Ogg MP3 FAAC 96k FAAC q30

Gainless の評点 (13 個の結果)

1 Very annoying 2 Annoying 3 Slightly annoying 4 Perceptible, but not annoying 5 Impercep- tible Opus AAC Ogg MP3 FAAC 96k FAAC q30

Joungmin Lee の評点 (11 個の結果)

1 Very annoying 2 Annoying 3 Slightly annoying 4 Perceptible, but not annoying 5 Impercep- tible Opus AAC Ogg MP3 FAAC 96k FAAC q30

2Bdecided の評点 (10 個の結果)

1 Very annoying 2 Annoying 3 Slightly annoying 4 Perceptible, but not annoying 5 Impercep- tible Opus AAC Ogg MP3 FAAC 96k FAAC q30

singlethread の評点 (10 個の結果)

1 Very annoying 2 Annoying 3 Slightly annoying 4 Perceptible, but not annoying 5 Impercep- tible Opus AAC Ogg MP3 FAAC 96k FAAC q30

音源ごとのビットレート

コーデックの設定は、多数の音楽に対して平均して約 96kbpsとなるように調整された(MP3とビリ基準は除く)。

音源のビットレート [kbps] 0 20 40 60 80 100 120 140 160 0.1.9-win32 iTunes 11, qaac 2.41 aoTuV b6.03 LAME 3.99.5 faac-1.28-mod from rarewares --bitrate 96 --cvbr 96 -q2.2 -V5 -b 96 -q 30 107kbps 104kbps 106kbps 136kbps 98kbps 52kbps Opus AAC Ogg MP3 FAAC 96k FAAC q30

これらは、ファイルサイズを元に計算されたビットレートである。

Sample	Length	Opus	AAC	Ogg	MP3	FAAC 96	FAAC q30
--------------------------------------------------------------------------
1	18.191	82	103	97	144	98	58	SinceAlways
2	20.155	111	106	107	137	98	54	Waiting
3	11.879	112	114	124	169	98	55	velvet
4	10.031	133	101	101	156	98	60	trumpet
5	15.957	122	101	134	155	98	51	girl
6	29.933	116	99	111	144	97	54	Can't Wait Until Tonight (Dry Wurlitzer Mix)
7	23.45	131	85	79	77	83	41	35_SQAM_glockenspiel_cut
8	30	100	108	105	128	98	44	Robots_old
								
9	20	103	109	116	148	98	48	Asleep__4.11-4.31_
10	20.178	103	100	89	120	98	54	Greatest_Love_of_All_2min57
11	20	92	102	96	131	98	55	Hey Tonight
12	20	120	100	94	131	98	54	Severance__1.31-1.51_
13	18.924	104	109	88	108	98	48	Shinsho_pool_3min45_4min4
14	22	90	100	107	131	98	56	SlavesOfFear
15	20	104	109	122	146	98	49	The Chastising of Renegade
16	22.304	124	99	96	127	98	55	TrosYGareg
								
17	9.028	96	95	99	121	98	46	4-Sound-English-male.441
18	9.707	119	104	113	154	99	48	9-Have-big-expensive-car.441
19	7.84	100	95	104	116	98	47	12-German-male-speech.441
20	8.566	94	99	100	129	98	52	15-Good-evening.441
21	9.656	112	105	89	133	98	52	21-classic.441
22	8.72	133	101	121	176	99	45	24-Greensleeves-Korean-male-speech.441
23	9.184	98	99	95	125	98	53	25-This-is-the-end.441
24	9.966	104	105	112	128	99	48	27-last-song-drums-and-trampets.441
								
25	28.505	101	106	94	120	98	53	bonhemian_rhapsody
26	14.986	104	107	122	145	98	53	clapton_44k
27	12.701	104	107	102	135	98	48	Coral
28	20.106	111	101	85	141	98	47	ExitMusic
29	5.007	97	116	143	160	98	54	liberate
30	29.849	93	103	102	131	98	55	NewYorkCity
31	30.002	97	99	106	134	98	49	sandman
32	22.092	114	109	133	138	98	60	take_your_finger_frin_my_head
								
33	29.932	113	106	119	137	98	51	Changes
34	13.742	121	111	108	126	98	53	Girl_In_The_Fire__Sample_
35	30.762	106	110	112	143	98	52	Hotel California
36	29.234	105	103	89	123	98	56	Jupiter, the Bringer of Jollity
37	25.481	104	110	114	147	98	48	Last_Of_The_Mohicanz__Sample_
38	24.671	96	110	100	130	98	48	Only Time
39	29.789	97	99	117	135	98	59	Through The Fire And Flames
40	16.403	103	103	99	144	98	56	With Love (Outro)
--------------------------------------------------------------------------
Mean	18.973 	106.7	103.7 	106.1 	135.5 	97.6 	51.7
Unit	second	kbps	kbps	kbps	kbps	kbps	kbps
Sample	Length	Opus	AAC	Ogg	MP3	FAAC 96	FAAC q30

  

ビットレート 対 評点 2D 散布図

Opus3.23.43.63.84.04.24.44.64.85.0648096112128144160176192bitrate [kbps]RatingsAAC3.23.43.63.84.04.24.44.64.85.0648096112128144160176192bitrate [kbps]Ogg3.23.43.63.84.04.24.44.64.85.0648096112128144160176192bitrate [kbps]RatingsMP33.23.43.63.84.04.24.44.64.85.0648096112128144160176192bitrate [kbps]

テストに使用された音源の試聴とダウンロード

左側のリンクがロスレスの原音、右側の点数のリンクが圧縮音源である。

音源名ジャンルOpus
1.1
AAC
Apple
Ogg
Vorbis
MP3
LAME
FAAC
96k
FAAC
q30
平均評点4.654.404.244.242.651.19
音源名ジャンルOpus
1.1
AAC
Apple
Ogg
Vorbis
MP3
LAME
FAAC
96k
FAAC
q30
Chrisの音源セット
SinceAlwaysGuitar4.964.864.664.422.631.33
WaitingPops4.584.494.034.292.611.07
velvetPerc.4.354.384.374.372.461.13
trumpetWind4.844.274.243.912.441.04
girlTechno4.493.243.954.082.581.24
Can't Wait Until Tonight (Dry Wurlitzer Mix)Pops4.433.773.384.582.571.06
35_SQAM_glockenspiel_cutInst.4.704.564.434.493.071.24
Robots_oldTechno4.914.534.673.612.631.06
アルバムコレクションからの音源セット
Asleep__4.11-4.31_Strings4.894.914.794.892.951.06
Greatest_Love_of_All_2min57Pops4.674.374.324.272.971.10
Hey TonightRock4.404.574.134.062.811.20
Severance__1.31-1.51_Pops4.653.954.004.282.721.37
Shinsho_pool_3min45_4min4Pops4.814.544.293.882.921.40
SlavesOfFearMetal4.914.314.854.742.851.23
The Chastising of RenegadeRock4.764.434.714.272.881.18
TrosYGaregPops4.494.254.153.962.491.24
MPEGシークエンスの音源セット
4-Sound-English-male.441Voice4.974.823.774.473.011.22
9-Have-big-expensive-car.441Pops4.714.044.284.172.591.12
12-German-male-speech.441Voice4.824.803.594.092.711.19
15-Good-evening.441Voice4.314.514.244.192.491.19
21-classic.441Classic4.694.573.963.942.891.43
24-Greensleeves-Korean-male-speech.441Voice5.004.324.234.402.921.00
25-This-is-the-end.441Voice4.894.414.204.562.701.23
27-last-song-drums-and-trampets.441Perc.4.574.343.974.062.771.00
前回2011年のAACリスニングテストからの音源セット
bonhemian_rhapsodyRock4.634.534.043.712.491.26
clapton_44kGuitar4.294.214.464.302.411.04
CoralPops4.944.504.534.622.571.29
ExitMusicVocal4.934.434.133.802.331.00
liberateMetal4.244.434.614.502.491.49
NewYorkCityPops4.804.074.134.482.381.00
sandmanRock4.934.334.404.732.661.36
take_your_finger_from_my_hairRock4.044.663.704.132.531.21
新しい HydrogeuAudio のスレッド 103989 からの音源セット
ChangesRock4.364.214.434.252.541.19
Girl_In_The_Fire__Sample_Rock4.364.504.134.032.941.10
Hotel CaliforniaRock4.814.594.134.462.731.23
Jupiter, the Bringer of JollityClassic4.484.423.804.102.731.30
Last_Of_The_Mohicanz__Sample_Electro4.684.214.674.322.271.18
Only TimeNewage4.514.694.204.192.531.11
Through The Fire And FlamesMetal4.654.484.683.912.381.51
With Love (Outro)Techno4.654.504.183.992.491.18

テスト後の選別

以下のような基準で、無効な結果は除却された。これはテスト前から決定され、公表されていたものである。

除却された結果は全体の7%未満であった。

ブートストラップ 分析

bootstrap.py --compare-all -p 1000000 -s 1000000 aq23.txt
bootstrap.py v1.0 2011-02-03
Copyright (C) 2011 Gian-Carlo Pascutto
License Affero GPL version 3 or later <http://www.gnu.org/licenses/agpl.html>

Reading from: C:\Users\PCC\Downloads\friedman124\aq23.txt
Read 6 treatments, 40 samples => 15 comparisons
Means:
AppleAAC      Opus       Ogg     MP3V5   FAAC96k   FAACq30
   4.400     4.653     4.235     4.237     2.652     1.194

Unadjusted p-values:
          Opus      Ogg       MP3V5     FAAC96k   FAACq30
AppleAAC  0.000*    0.023*    0.016*    0.000*    0.000*
Opus      -         0.000*    0.000*    0.000*    0.000*
Ogg       -         -         0.981     0.000*    0.000*
MP3V5     -         -         -         0.000*    0.000*
FAAC96k   -         -         -         -         0.000*

Opus is better than AppleAAC (p=0.000)
Ogg is worse than AppleAAC (p=0.023)
Ogg is worse than Opus (p=0.000)
MP3V5 is worse than AppleAAC (p=0.016)
MP3V5 is worse than Opus (p=0.000)
FAAC96k is worse than AppleAAC (p=0.000)
FAAC96k is worse than Opus (p=0.000)
FAAC96k is worse than Ogg (p=0.000)
FAAC96k is worse than MP3V5 (p=0.000)
FAACq30 is worse than AppleAAC (p=0.000)
FAACq30 is worse than Opus (p=0.000)
FAACq30 is worse than Ogg (p=0.000)
FAACq30 is worse than MP3V5 (p=0.000)
FAACq30 is worse than FAAC96k (p=0.000)

p-values adjusted for multiple comparison:
          Opus      Ogg       MP3V5     FAAC96k   FAACq30
AppleAAC  0.000*    0.044*    0.043*    0.000*    0.000*
Opus      -         0.000*    0.000*    0.000*    0.000*
Ogg       -         -         0.981     0.000*    0.000*
MP3V5     -         -         -         0.000*    0.000*
FAAC96k   -         -         -         -         0.000*

Opus is better than AppleAAC (p=0.000)
Ogg is worse than AppleAAC (p=0.044)
Ogg is worse than Opus (p=0.000)
MP3V5 is worse than AppleAAC (p=0.043)
MP3V5 is worse than Opus (p=0.000)
FAAC96k is worse than AppleAAC (p=0.000)
FAAC96k is worse than Opus (p=0.000)
FAAC96k is worse than Ogg (p=0.000)
FAAC96k is worse than MP3V5 (p=0.000)
FAACq30 is worse than AppleAAC (p=0.000)
FAACq30 is worse than Opus (p=0.000)
FAACq30 is worse than Ogg (p=0.000)
FAACq30 is worse than MP3V5 (p=0.000)
FAACq30 is worse than FAAC96k (p=0.000)

  

ANOVA 分析

FRIEDMAN version 1.24 (Jan 17, 2002) http://ff123.net/
Blocked ANOVA analysis

Number of listeners: 40
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              239         385.20
Testers (blocks)    39           4.52
Codecs eval'd        5         369.44   73.89   1282.39  0.00E+000
Error              195          11.24    0.06
---------------------------------------------------------------
Fisher's protected LSD for ANOVA:   0.106

Means:

Opus     AppleAAC MP3V5    Ogg      FAAC96k  FAACq30
  4.65     4.40     4.24     4.24     2.65     1.19

---------------------------- p-value Matrix ---------------------------

         AppleAAC MP3V5    Ogg      FAAC96k  FAACq30
Opus     0.000*   0.000*   0.000*   0.000*   0.000*
AppleAAC          0.003*   0.002*   0.000*   0.000*
MP3V5                      0.976    0.000*   0.000*
Ogg                                 0.000*   0.000*
FAAC96k                                      0.000*
-----------------------------------------------------------------------

Opus is better than AppleAAC, MP3V5, Ogg, FAAC96k, FAACq30
AppleAAC is better than MP3V5, Ogg, FAAC96k, FAACq30
MP3V5 is better than FAAC96k, FAACq30
Ogg is better than FAAC96k, FAACq30
FAAC96k is better than FAACq30

  

フォーマット済みの評点

ANOVA分析、ブートストラップ分析とgraphmaker 5向けにパースされた評点。

Opus	AAC	Ogg	MP3	FAAC96k	FAACq30
%feature	10	0.1.9-win32	iTunes 11, qaac 2.41	aoTuV b6.03	LAME 3.99.5	faac-1.28-mod from rarewares	faac-1.28-mod from rarewares
%feature	11	--bitrate 96	--cvbr 96	-q2.2	-V5	-b 96	-q 30
%feature	12	107kbps	104kbps	106kbps	136kbps	98kbps	52kbps
%genre Chris's set of tracks
4.960 	4.860 	4.660 	4.420 	2.630 	1.330 
4.580 	4.490 	4.030 	4.290 	2.610 	1.070 
4.345 	4.382 	4.373 	4.373 	2.464 	1.127 
4.840 	4.270 	4.240 	3.910 	2.440 	1.040 
4.492 	3.238 	3.954 	4.077 	2.577 	1.238 
4.433 	3.767 	3.378 	4.578 	2.567 	1.056 
4.700 	4.558 	4.425 	4.492 	3.067 	1.242 
4.911 	4.533 	4.667 	3.611 	2.633 	1.056 
%genre Tracks randomly picked from album libraries
4.885 	4.908 	4.785 	4.885 	2.946 	1.062 
4.667 	4.367 	4.322 	4.267 	2.967 	1.100 
4.400 	4.567 	4.133 	4.056 	2.811 	1.200 
4.650 	3.950 	4.000 	4.283 	2.717 	1.367 
4.811 	4.544 	4.289 	3.878 	2.922 	1.400 
4.913 	4.313 	4.850 	4.738 	2.850 	1.225 
4.760 	4.430 	4.710 	4.270 	2.880 	1.180 
4.488 	4.250 	4.150 	3.963 	2.488 	1.238 
%genre Mpeg Sequences
4.970 	4.820 	3.770 	4.470 	3.010 	1.220 
4.711 	4.044 	4.278 	4.167 	2.589 	1.122 
4.820 	4.800 	3.590 	4.090 	2.710 	1.190 
4.314 	4.514 	4.243 	4.186 	2.486 	1.186 
4.686 	4.571 	3.957 	3.943 	2.886 	1.429 
5.000 	4.317 	4.233 	4.400 	2.917 	1.000 
4.888 	4.413 	4.200 	4.563 	2.700 	1.225 
4.571 	4.343 	3.971 	4.057 	2.771 	1.000 
%genre Tracks picked from previous 2011 AAC test
4.629 	4.529 	4.043 	3.714 	2.486 	1.257 
4.286 	4.214 	4.457 	4.300 	2.414 	1.043 
4.940 	4.500 	4.530 	4.620 	2.570 	1.290 
4.933 	4.433 	4.133 	3.800 	2.333 	1.000 
4.243 	4.429 	4.614 	4.500 	2.486 	1.486 
4.800 	4.067 	4.133 	4.483 	2.383 	1.000 
4.925 	4.325 	4.400 	4.725 	2.663 	1.363 
4.043 	4.657 	3.700 	4.129 	2.529 	1.214 
%genre Tracks picked from new HA thread 103989
4.363 	4.213 	4.425 	4.250 	2.538 	1.188 
4.363 	4.500 	4.125 	4.025 	2.938 	1.100 
4.814 	4.586 	4.129 	4.457 	2.729 	1.229 
4.483 	4.417 	3.800 	4.100 	2.733 	1.300 
4.678 	4.211 	4.667 	4.322 	2.267 	1.178 
4.514 	4.686 	4.200 	4.186 	2.529 	1.114 
4.650 	4.475 	4.675 	3.913 	2.375 	1.513 
4.650 	4.500 	4.175 	3.988 	2.488 	1.175 
%samples	SinceAlways	Guitar
%samples	Waiting	Pops
%samples	velvet	Perc.
%samples	trumpet	Wind
%samples	girl	Techno
%samples	Can't Wait Until Tonight (Dry Wurlitzer Mix)	Pops
%samples	35_SQAM_glockenspiel_cut	Inst.
%samples	Robots_old	Techno

%samples	Asleep__4.11-4.31_	Strings
%samples	Greatest_Love_of_All_2min57	Pops
%samples	Hey Tonight	Rock
%samples	Severance__1.31-1.51_	Pops
%samples	Shinsho_pool_3min45_4min4	Pops
%samples	SlavesOfFear	Metal
%samples	The Chastising of Renegade	Rock
%samples	TrosYGareg	Pops

%samples	4-Sound-English-male.441	Voice
%samples	9-Have-big-expensive-car.441	Pops
%samples	12-German-male-speech.441	Voice
%samples	15-Good-evening.441	Voice
%samples	21-classic.441	Classic
%samples	24-Greensleeves-Korean-male-speech.441	Voice
%samples	25-This-is-the-end.441	Voice
%samples	27-last-song-drums-and-trampets.441	Perc.

%samples	bonhemian_rhapsody	Rock
%samples	clapton_44k	Guitar
%samples	Coral	Pops
%samples	ExitMusic	Vocal
%samples	liberate	Metal
%samples	NewYorkCity	Pops
%samples	sandman	Rock
%samples	take_your_finger_from_my_hair	Rock

%samples	Changes	Rock
%samples	Girl_In_The_Fire__Sample_	Rock
%samples	Hotel California	Rock
%samples	Jupiter, the Bringer of Jollity	Classic
%samples	Last_Of_The_Mohicanz__Sample_	Electro
%samples	Only Time	Newage
%samples	Through The Fire And Flames	Metal
%samples	With Love (Outro)	Techno
%link_path tracks/ .wav .opus1.1.b96k.opus .qaac.cvbr96k.mp4 .aotuv.q2.2.ogg .lame3.99.5.v5.mp3 .faac.abr96k.mp4 .faac.vbr30q.mp4

  

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