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<div class=" wh_topic_content body "><main role="main"><article class="- topic/topic topic" role="article" aria-labelledby="ariaid-title1"><span class="edit-link" style="font-size:12px; opacity:0.6; text-align:right; vertical-align:middle"><a target="_blank" href="http://172.16.35.88/tasks/jdssno1uvvbf2mltu9kb9v3if05d5gopuakboe8hlud18rma/edit/F:/aicdita/aicdita-cn/topics/sdk/audio/audio_user_guide.dita">Edit online</a></span><h1 class="- topic/title title topictitle1" id="ariaid-title1">Audio 使用指南</h1><div class="date inPage">15 Jan 2024</div><div style="color: gray;"></div><div class="- topic/body body"><p class="- topic/p p" data-ofbid="d230097e19__20250121171651">Audio 是一个内置在 SOC 内部的音频模块。该模块内部集成了 ADC、DMIC 音频输入和 PWM 音频
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输出，经过数字信号的处理，实现音频信号的录入以及播放等功能。</p><div class="- topic/p p" data-ofbid="d230097e21__20250121171651">
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<div class="table-container"><table class="- topic/table table frame-all" id="id__table_lhz_5v3_ddc" data-ofbid="id__table_lhz_5v3_ddc" data-cols="2"><caption class="- topic/title title tablecap" data-caption-side="top" data-is-repeated="true"><span class="table--title-label">表<span class="table--title-label-number"> 1</span><span class="table--title-label-punctuation">. </span></span><span class="table--title">术语定义</span></caption><colgroup><col style="width:39.525691699604735%"/><col style="width:60.47430830039525%"/></colgroup><thead class="- topic/thead thead"><tr class="- topic/row"><th class="- topic/entry entry colsep-1 rowsep-1" id="id__table_lhz_5v3_ddc__entry__1">术语</th><th class="- topic/entry entry colsep-0 rowsep-1" id="id__table_lhz_5v3_ddc__entry__2">定义</th></tr></thead><tbody class="- topic/tbody tbody"><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_lhz_5v3_ddc__entry__1">PCM</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="id__table_lhz_5v3_ddc__entry__2">脉冲编码调制</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_lhz_5v3_ddc__entry__1">PDM</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="id__table_lhz_5v3_ddc__entry__2">脉冲密度调制</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_lhz_5v3_ddc__entry__1">SDM</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="id__table_lhz_5v3_ddc__entry__2">Sigma Delta Modulation</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_lhz_5v3_ddc__entry__1">DF</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="id__table_lhz_5v3_ddc__entry__2">抽值滤波器</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_lhz_5v3_ddc__entry__1">IF</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="id__table_lhz_5v3_ddc__entry__2">插值滤波器</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_lhz_5v3_ddc__entry__1">HDF</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="id__table_lhz_5v3_ddc__entry__2">高通滤波器</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_lhz_5v3_ddc__entry__1">DVC</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="id__table_lhz_5v3_ddc__entry__2">数字音量控制器</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-0" headers="id__table_lhz_5v3_ddc__entry__1">DMICI/F</td><td class="- topic/entry entry colsep-0 rowsep-0" headers="id__table_lhz_5v3_ddc__entry__2">数字 MIC 接口</td></tr></tbody></table></div>
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</div><section class="- topic/section section" id="id__id3" data-ofbid="id__id3"><h2 class="- topic/title title sectiontitle">特性说明</h2>
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<ul class="- topic/ul ul simple" id="id__ul_mhz_5v3_ddc" data-ofbid="id__ul_mhz_5v3_ddc"><li class="- topic/li li" data-ofbid="d230097e84__20250121171651">
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<p class="- topic/p p" data-ofbid="d230097e86__20250121171651">支持 1 路模拟音频输入</p>
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</li><li class="- topic/li li" data-ofbid="d230097e89__20250121171651">
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<p class="- topic/p p" data-ofbid="d230097e91__20250121171651">支持数字 DMIC 立体声输入</p>
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</li><li class="- topic/li li" data-ofbid="d230097e94__20250121171651">
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<p class="- topic/p p" data-ofbid="d230097e96__20250121171651">支持 2 路单端输出(立体声)，或差分输出(单声道)</p>
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</li><li class="- topic/li li" data-ofbid="d230097e99__20250121171651">
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<p class="- topic/p p" data-ofbid="d230097e101__20250121171651">无 DAC 设计，输出采用 PWM 输出</p>
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</li><li class="- topic/li li" data-ofbid="d230097e104__20250121171651">
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<p class="- topic/p p" data-ofbid="d230097e106__20250121171651">输入和输出通路均支持数字音量控制</p>
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</li><li class="- topic/li li" data-ofbid="d230097e109__20250121171651">
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<p class="- topic/p p" data-ofbid="d230097e111__20250121171651">支持混音</p>
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</li><li class="- topic/li li" data-ofbid="d230097e114__20250121171651">
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<p class="- topic/p p" data-ofbid="d230097e116__20250121171651">只支持 16bit 音频数据</p>
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</li></ul>
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</section></div></article></main></div>
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