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1.The ADPCM system is a type of digital audio coder that uses a variable-length code to compress audio data.
ADPCM系统是一种数字音频编码器，使用可变长度的编码来压缩音频数据。
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2. In the ADPCM system, the variable-length code is used to represent each sample in the audio signal.
在ADPCM系统中，可变长度的编码用于表示音频信号中的每个样本。
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3. The ADPCM system is widely used in digital audio transmission systems due to its high compression ratio and low bitrate requirements.
由于其高压缩比和低比特率要求，ADPCM系统在数字音频传输系统中得到了广泛应用。