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| atmega128-16au资料 | |
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atmega128-16au |
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file size : 116 kb
manufacturer:atmel description: an adaptive differential pcm (adpcm) transcoder is used to reduce the data rate required to transmit a pcm encoded voice signal while maintaining the voice fidelity and intelli- gibility of the pcm signal. the transcoder is used on 64 kbps data streams which represent either voice or voice band data signals that have been digitized by a codec (e.g., mc145557). the transcoder uses a filter to attempt to predict the next pcm input value based on previous pcm input values. the error between the predicted and the true pcm input value is the information that is sent to the other end of the line. hence the word differ- ential, since the adpcm data stream is the difference be- tween the true pcm input value and the predicted value. the term adaptive applies to the filter that is performing the pre- diction. it is adaptive in that its transfer function changes based on the pcm input data. that is, it adapts to the statis- tics of the signals presented to it. |
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| 1pcs | 100pcs | 1k | 10k | ||
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型 号：atmega128-16au 厂 家：atmel 封 装：09 批 号：qfp64 数 量：3500 说 明：特价出售，全新原装.再三强调公司现货 |
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运 费： 所在地： 新旧程度： |
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