Dolby聽力測試筆記

1、主觀聽力測試筆記(ListeningTests)RD鄰燦注：杜比測試共分為兩大類，分別是ListeningTests聽力測試)和ElectricalTests電氣性能測試)，PBI實驗室目前僅支持測試聽力部分的內(nèi)容。有關(guān)杜比測試的英文版測試用例如下：MFDolbyDigitalPlusDecoderforConsumerBDolbyDigitalPlusDecoderforConsumerBDC352的聽力測試部分文檔供各位參考:DC352聽力測試也分為兩類，分別是DD和DDP兩種，所以要注意，相應(yīng)的測試報告文檔也有兩份，DD和DDP的并不一樣。當(dāng)測試DD的時候播放相應(yīng)的DD的碼流即可，DDP

2、也一樣。這里插入我測試過的雪DC352dd_s_test_broadcastresulddp_s_test_broadcastresuPS:該筆記的所有內(nèi)容只是屬于個人摸索和經(jīng)驗得出，所以僅具有一定參考價值，不可全憑此作為測試依據(jù)。如有不理解或者意見不一致的地方希望大家能參考上方的英文文檔，或進一步與專家和其他同事討論?；靖拍睿?.1聲道：中央聲道、前置左、右聲道、后置左、右環(huán)繞聲道，及所謂的0.1聲道即重低音聲道7.1聲道：7.1聲道系統(tǒng)的作用簡單來說就是在聽者的周圍建立起一套前后聲場相對平衡的聲場，不同于5.1聲道聲場的是，它在原有的基礎(chǔ)上增加了中左、中右2個喇叭通道。LFELFE(LO

3、Wfrequencyeffects)是低頻音效的加強通道。卜面以DC352機器的DDP測試文檔解析為例:ChannelIdentification通道辨認(rèn)DigitalOutputs數(shù)字輸出ConvertedDolbyDigital杜比數(shù)字轉(zhuǎn)換S/PDIFOutputSPDIF輸出TestSignalPassCriterionPassFail8ch_voices_id_21L,C,R,Rs,Ls,andLFEarereproducedintheexternaldecoderoutput.Comments:測試解析：播放相應(yīng)的碼流，看S/PDIF通道的外部解碼輸出能否能聽到L,C,R,RS,L濟

4、口LEF的聲道聲音，根據(jù)聽到結(jié)果判斷相應(yīng)的PAS鼠FAILHDMIOutputHDMI輸出HDMIOutputTypeSourceSink(AudioReturnChannel)TestSignalPassCriterionPassFail8ch_voices_id_21L,C,R,Rs,Ls,andLFEarereproducedintheexternaldecoderoutput.Comments:測試解析：因機頂盒是輸出源，因此選擇Source選項。播放相應(yīng)測試碼流，仔細(xì)聽HDMI夕卜部輸出接口是否能聽到相應(yīng)聲道的聲音。DecodedPCMPCM解碼DecoderOutputChanne

5、ls7.1channelsc5.1channelsTwochannelsOther:S/PDIFOutputS/PDIF輸出TestSignalPassCriterionPassFail8ch_voices_id_21L,C,R,Rs,Ls,andLFEarereproducedintheexternaldecoderoutput.Comments:測試解析：我們的放大器有七個外部聲道接口（紅黑兩色旋鈕型）外加一個重低音聲道Subwoofer（蓮花頭接口型，能插入AV線的那種），因此是支持7.1聲道輸出的。測試方法雷同，由于此處要求的是DecodedPCM即PCM解碼方式輸出，因此我們要調(diào)節(jié)到

6、相應(yīng)的PCM解碼輸出來測試。HDMIOutputHDMIOutputTypeSourceSink(AudioReturnChannel)TestSignalDecoderOutputPassCriterionPassFail8ch_voices_id_21Twochannel5.1channelL,C,R,Rs,Ls,andLFEarereproducedintheexternaldecoderoutput.7.1channelL,C,R,Rs,Rrs,Lrs,Ls,andLFEarereproducedintheexternaldecoderoutput.Comments:測試解析：在PCM

7、模式下播放，應(yīng)能聽到5個聲道聲音；在PASSTHROUGH模式下播放，應(yīng)能聽到7個聲道聲音。BitstreamPass-ThroughS/PDIFOutputTestSignalPassCriterionPassFailChID_voices_swp_acmod_ddL,C,R,Rs,Ls,andLFEarereproducedintheexternaldecoderoutput.Comments:測試解析：在PASSTHROUGH莫式下，播放相應(yīng)的DDP碼流時，S/PDIF接口輸出應(yīng)該能聽到L,C,R,RS,L刮LFE聲道的聲音。HDMIOutputHDMI輸出HDMIOutputTypeS

8、ourceSink(AudioReturnChannel)TestSignalPassCriterionPassFail8ch_voices_id_21L,C,R,Rs,Rrs,Lrs,Ls,andLFEarereproducedintheexternaldecoderoutput.ChID_voices_swp_acmod_ddL,C,R,Rs,Ls,andLFEarereproducedintheexternaldecoderoutput.Comments:AnalogOutputTestSignalDecoderOutputPassCriterionPassFailNotSupporte

9、dChID_voices_swp_acmod_ddpTwochannel5.1channelL,C,R,Rs,Ls,andLFEarereproducedintheexternaldecoder.N/AChID_voices_swp_acmod_ddTwochannel5.1channelL,C,R,Rs,Ls,andLFEarereproducedintheexternaldecoder.N/A8ch_voices_id_217.1channelL,C,R,Rs,Rrs,Lrs,Ls,andLFEarereproducedattheexternaldecoder.DifficultBitst

10、reams復(fù)雜碼流PrimaryOutputTestSignalPassCriterionResultPassFail6ch_diff_mus1_7Playbackwithoutaudioartifactsduringanyproductconfiguration6ch_diff_mus2_7PlaybackwithoutaudioartifactsduringanyproductconfigurationComments:Data-RateSupport碼率支持PrimaryOutputTestSignalDataRate(kbps)PassCriterionDataRateSupporte

11、dPassFail2ch_dtrtswp_64to640_2_ddVariesPlaybackwithoutaudioartifacts.(Data-ratesweepsmayhavebarelyaudiblepopsbetweentransitions.)2ch_dtrtswp_96to640_2_ddpVaries5ch_datarate_1008_71,0085ch_datarate_1512_71,5125ch_datarate_3024_73,024Comments:測試解析：播放對應(yīng)碼流。（數(shù)據(jù)速率掃描轉(zhuǎn)換之間要求幾乎聽不見的持久性噪音）ErrorConcealment差錯掩蓋Pr

12、imaryOutputandBitstreamOutput(IfIncluded)TestSignalOutputTypePassCriteriaResultsPassFailNotSupported6ch_err_conceal_7PrimaryNoaudiblepops,clicks,orglitches.Temporarymutingorblockrepeatsareacceptable,thoughproductmustresumedecodingwithin50ms.N/AConvertedDolbyDigitalComments:測試解析：播放相應(yīng)測試碼流時，不允許聽到爆裂聲，點擊

13、次數(shù)，或毛刺。暫時靜音或重復(fù)塊是可以接受的，但產(chǎn)品必須在50毫秒內(nèi)恢復(fù)解碼。ConsumerEncoderBitstreams用戶編碼碼流PrimaryOutputTestSignalPassCriterionResultPassFail6ch_bsid12_7Playbackwithoutaudioartifacts6ch_bsid4_7PlaybackwithoutaudioartifactsComments:額外碼流信息AdditionalBitstreamInformationBitstreamsPrimaryOutputTestSignalPassCriterionResultPas

14、sFail6ch_addbsi_7PlaybackwithoutaudioartifactsComments:Dual-MonoSupport多伴音支持PrimaryOutputTestSignalPassCriteriaResultsPassFailNotSupported2ch_dualmono_0Productoffersthestereodual-monoreproductionmode.N/AProductindicatesthepresenceofdual-monoencodedbitstreams.Productoffersthechannel1monodual-monorepr

15、oductionmode.Productoffersthechannel2monodual-monoreproductionmode.Comments:AssociatedAudio杜比加支持PrimaryOutputTestSignalsPassCriteriaResultPassFailNotSupporteddual_m51_a1_ind_subProductisabletodecodethemainaudioprogramonly.N/AProductofferstheuseranoptiontomixtheassociatedaudiowiththemainaudio.Product

16、offerstheuseranoptiontoswitchtotheassociatedaudioprogram.Productcorrectlyappliesmixingmetadatatotheassociatedaudioprogram.dual_m51_a1_sep_pesProductisabletodecodethemainaudioprogramonly.N/AProductofferstheuseranoptiontomixtheassociatedaudiowiththemainaudio.Productofferstheuseranoptiontoswitchtotheassociatedaudioprogram.Productcorrectlyappliesmixingmetadatatotheassociatedaudioprogram.Comments:HDMIInputHDMI