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<div class=" wh_topic_content body "><main role="main"><article class="- topic/topic concept/concept topic concept" role="article" aria-labelledby="ariaid-title1">
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<span class="edit-link" style="font-size:12px; opacity:0.6; text-align:right; vertical-align:middle"><a target="_blank" title="Edit this document" href="http://172.16.35.88/tasks/jdssno1uvvbf2mltu9kb9v3if05d5gopuakboe8hlud18rma/edit/F:/aicdita/aicdita-cn/topics/sdk/audio_codec/audio-codec-user-guide.dita">Edit online</a></span><h1 class="- topic/title title topictitle1" id="ariaid-title1">Audio Codec 使用指南</h1>
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<div class="date inPage">15 Jan 2024</div><div style="color: gray;"></div>
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<div class="- topic/body concept/conbody body conbody">
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<p class="- topic/p p" data-ofbid="d206824e33__20250123155223">Audio Codec 模块内置
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<span class="- topic/ph ph">Sigma-Delta ADC、</span> DMIC 接口和 PWM
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音频输出模块，经过数字信号的处理，实现音频信号的录入以及播放功能。</p>
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<div class="table-container"><table class="- topic/table table frame-all" id="audio_codec_user_guide__table_mdd_bym_d1c" data-ofbid="audio_codec_user_guide__table_mdd_bym_d1c" 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:50%"/><col style="width:50%"/></colgroup><thead class="- topic/thead thead">
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<tr class="- topic/row">
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<th class="- topic/entry entry colsep-1 rowsep-0" id="audio_codec_user_guide__table_mdd_bym_d1c__entry__1">术语</th>
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<th class="- topic/entry entry colsep-0 rowsep-0" id="audio_codec_user_guide__table_mdd_bym_d1c__entry__2">定义</th>
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<td class="- topic/entry entry colsep-1 rowsep-0" headers="audio_codec_user_guide__table_mdd_bym_d1c__entry__1">PCM</td>
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<td class="- topic/entry entry colsep-0 rowsep-0" headers="audio_codec_user_guide__table_mdd_bym_d1c__entry__2">脉冲编码调制</td>
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<td class="- topic/entry entry colsep-1 rowsep-0" headers="audio_codec_user_guide__table_mdd_bym_d1c__entry__1">PDM</td>
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<td class="- topic/entry entry colsep-0 rowsep-0" headers="audio_codec_user_guide__table_mdd_bym_d1c__entry__2">脉冲密度调制</td>
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</tr>
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<td class="- topic/entry entry colsep-1 rowsep-0" headers="audio_codec_user_guide__table_mdd_bym_d1c__entry__1">SDM</td>
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<td class="- topic/entry entry colsep-0 rowsep-0" headers="audio_codec_user_guide__table_mdd_bym_d1c__entry__2">Sigma Delta Modulation</td>
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<tr class="- topic/row">
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<td class="- topic/entry entry colsep-1 rowsep-0" headers="audio_codec_user_guide__table_mdd_bym_d1c__entry__1">DF</td>
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<td class="- topic/entry entry colsep-0 rowsep-0" headers="audio_codec_user_guide__table_mdd_bym_d1c__entry__2">抽值滤波器</td>
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<td class="- topic/entry entry colsep-1 rowsep-0" headers="audio_codec_user_guide__table_mdd_bym_d1c__entry__1">IF</td>
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<td class="- topic/entry entry colsep-0 rowsep-0" headers="audio_codec_user_guide__table_mdd_bym_d1c__entry__2">插值滤波器</td>
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</tr>
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<td class="- topic/entry entry colsep-1 rowsep-0" headers="audio_codec_user_guide__table_mdd_bym_d1c__entry__1">HDF</td>
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<td class="- topic/entry entry colsep-0 rowsep-0" headers="audio_codec_user_guide__table_mdd_bym_d1c__entry__2">高通滤波器</td>
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</tr>
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<tr class="- topic/row">
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<td class="- topic/entry entry colsep-1 rowsep-0" headers="audio_codec_user_guide__table_mdd_bym_d1c__entry__1">DVC</td>
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<td class="- topic/entry entry colsep-0 rowsep-0" headers="audio_codec_user_guide__table_mdd_bym_d1c__entry__2">数字音量控制器</td>
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</tr>
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<td class="- topic/entry entry colsep-1 rowsep-0" headers="audio_codec_user_guide__table_mdd_bym_d1c__entry__1">DMICI/F</td>
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<td class="- topic/entry entry colsep-0 rowsep-0" headers="audio_codec_user_guide__table_mdd_bym_d1c__entry__2">数字 MIC 接口</td>
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