Dolby听力测试重点笔记czou.doc

主观听力测试笔记（Listening Tests）RD-邹灿注：杜比测试共分为两大类，分别是Listening Tests（听力测试）和Electrical Tests（电气性能测试），PBI实验室当前仅支持测试听力某些内容。关于杜比测试英文版测试用例如下： 听力测试也分为两类，分别是DD和DDP两种，因此要注意，相应测试报告文档也有两份，DD和DDP并不同样。当测试DD时候播放相应DD码流即可，DDP也同样。这里插入我测试过DC352听力测试某些文档供各位参照： PS：该笔记所有内容只是属于个人摸索和经验得出，因此仅具备一定参照价值，不可全凭此作为测试根据。如有不理解或者意见不一致地方但愿人们能参照上方英文文档，或进一步与专家和其她同事讨论。基本概念：5.1声道：中央声道、前置左、右声道、后置左、右环绕声道，及所谓0.1声道即重低音声道7.1声道：7.1声道系统作用简朴来说就是在听者周边建立起一套先后声场相对平衡声场，不同于5.1声道声场是，它在原有基本上增长了中左、中右2个喇叭通道。LFE：LFE（LOW frequency effects）是低频音效加强通道。下面以DC352机器DDP 测试文档解析为例：2.2.1Channel Identification 通道辨认Digital Outputs 数字输出Converted Dolby Digital 杜比数字转换S/PDIF Output SPDIF 输出Test SignalPass CriterionPassFail8ch_voices_id_21L，C，R，Rs，Ls，and LFE are reproduced in the external decoder output.Comments:测试解析：播放相应码流，看S/PDIF通道外部解码输出能否能听到L,C,R,RS,LS和LEF声道声音，依照听到成果判断相应PASS或FAIL。HDMI Output HDMI输出HDMI Output TypeSourceSink (Audio Return Channel)Test SignalPass CriterionPassFail8ch_voices_id_21L，C，R，Rs，Ls，and LFE are reproduced in the external decoder output.Comments:测试解析：因机顶盒是输出源，因而选取Source选项。播放相应测试码流，仔细听HDMI外部输出接口与否能听到相应声道声音。Decoded PCM PCM 解码Decoder Output Channels7.1 channels5.1 channels Two channelsOther： S/PDIF Output S/PDIF 输出Test SignalPass CriterionPassFail8ch_voices_id_21L，C，R，Rs，Ls，and LFE are reproduced in the external decoder output.Comments:测试解析：咱们放大器有七个外部声道接口（红黑两色旋钮型）外加一种重低音声道Subwoofer（莲花头接口型，能插入AV线那种），因而是支持7.1声道输出。测试办法雷同，由于此处规定是Decoded PCM即PCM解码方式输出，因而咱们要调节到相应PCM解码输出来测试。HDMI OutputHDMI Output TypeSourceSink (Audio Return Channel)Test SignalDecoder OutputPass CriterionPassFail8ch_voices_id_21Two channel5.1 channelL，C，R，Rs，Ls，and LFE are reproduced in the external decoder output.7.1 channelL，C，R，Rs，Rrs，Lrs，Ls，and LFE are reproduced in the external decoder output.Comments：测试解析：在PCM模式下播放，应能听到5个声道声音；在PASS THROUGH模式下播放，应能听到7个声道声音。 Bitstream Pass-ThroughS/PDIF OutputTest SignalPass CriterionPassFailChID_voices_swp_acmod_ddL，C，R，Rs，Ls，and LFE are reproduced in the external decoder output.Comments：测试解析：:在PASS THROUGH模式下，播放相应DDP码流时，S/PDIF接口输出应当能听到L,C,R,RS,LS和LFE声道声音。HDMI Output HDMI 输出HDMI Output TypeSourceSink (Audio Return Channel)Test SignalPass CriterionPassFail8ch_voices_id_21L，C，R，Rs，Rrs，Lrs，Ls，and LFE are reproduced in the external decoder output.ChID_voices_swp_acmod_ ddL，C，R，Rs，Ls，and LFE are reproduced in the external decoder output.Comments:Analog OutputTest SignalDecoder OutputPass CriterionPassFailNot SupportedChID_voices_swp_acmod_ddpTwo channel5.1 channelL，C，R，Rs，Ls，and LFE are reproduced in the external decoder.N/AChID_voices_swp_acmod_ddTwo channel5.1 channelL，C，R，Rs，Ls，and LFE are reproduced in the external decoder.N/A8ch_voices_id_217.1 channelL，C，R，Rs，Rrs，Lrs，Ls，and LFE are reproduced at the external decoder.2.2.2 Difficult Bitstreams 复杂码流Primary OutputTest SignalPass CriterionResultPassFail6ch_diff_mus1_7Playback without audio artifacts during any product configuration6ch_diff_mus2_7Playback without audio artifacts during any product configurationComments:2.2.3Data-Rate Support 码率支持Primary OutputTest SignalData Rate (kbps)Pass CriterionData Rate SupportedPassFail2ch_dtrtswp_64to640_2_ddVariesPlayback without audio artifacts. (Data-rate sweeps may have barely audible pops between transitions.)2ch_dtrtswp_96to640_2_ddpVaries5ch_datarate_1008_71,0085ch_datarate_1512_71,5125ch_datarate_3024_73,024Comments:测试解析：播放相应码流。（数据速率扫描转换之间规定几乎听不见持久性噪音）。2.2.4Error Concealment 差错掩盖Primary Output and Bitstream Output (If Included)Test SignalOutput TypePass CriteriaResultsPassFailNot Supported6ch_err_conceal_7PrimaryNo audible pops，clicks，or glitches.Temporary muting or block repeats are acceptable，though product must resume decoding within 50 ms.N/AConverted Dolby DigitalComments:测试解析：播放相应测试码流时，不容许听到爆裂声，点击次数，或毛刺。暂时静音或重复块是可以接受，但产品必要在50毫秒内恢复解码。2.2.5Consumer Encoder Bitstreams 顾客编码码流Primary OutputTest SignalPass CriterionResultPassFail6ch_bsid12_7Playback without audio artifacts6ch_bsid4_7Playback without audio artifactsComments:2.2.6Additional Bitstream Information Bitstreams 额外码流信息Primary OutputTest SignalPass CriterionResultPassFail6ch_addbsi_7Playback without audio artifactsComments:2.2.7Dual-Mono Support 多伴音支持Primary OutputTest SignalPass CriteriaResultsPassFailNot Supported2ch_dualmono_0Product offers the stereo dual-mono reproduction mode.N/AProduct indicates the presence of dual-mono encoded bitstreams.Product offers the channel 1 mono dual-mono reproduction mode.Product offers the channel 2 mono dual-mono reproduction mode.Comments:2.2.8Associated Audio 杜比加支持Primary OutputTest SignalsPass CriteriaResultPassFailNot Supporteddual_m51_a1_ind_subProduct is able to decode the main audio program only.N/AProduct offers the user an option to mix the associated audio with the main audio.Product offers the user an option to switch to the associated audio program.Product correctly applies mixing metadata to the associated audio program.dual_m51_a1_sep_pesProduct is able to decode the main audio program only.N/AProduct offers the user an option to mix the associated audio with the main audio.Product offers the user an option to switch to the associated audio program.Product correctly applies mixing metadata to the associated audio program.Comments:2.2.9HDMI Input HDMI 输入Primary OutputTest SignalPass CriteriaPassFail6ch_voices_id_7.ac3L，C，R，Rs，Ls，and LFE are reproduced in the external decoder output.bd_8ch_voices_id_21 (for Blu-ray Disc)or8ch_voices_id_21 (for set-top box)L，C，R，Rs，Ls，and LFE are reproduced in the external decoder output.Comments: