Adaptive Transform Coding (ATC)自适应变换编码

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本文介绍了ATC编码，一种针对16KBPS优化的低比特率语音算法，主要应用于带宽有限的北美分段T-1网络和国际多国网络。非标准的ATC及其变体主要在私人网络中使用，对于经过良好调整的系统，即使在多个模拟/数字转换的tandemcall中也能保持性能。

Adaptive Transform Coding (ATC)

ATC coding is a Low Bit Rate Voice (LBRV) algorithm designed for optimal operation at 16 KBPS. It is typically implemented into networks that have limited available bandwidth. This can be small North American Fractional T-1 networks, or International/Multinational networks, where bandwidth is not as readily available as within North America.

ATC (and its variants) is NOT STANDARDIZED. Use is usually limited to private networks. In a well-adjusted system, ATC algorithms may be suitable for up to 1 tandem call (e.g. 2 analog/digital conversions) without significant degradation.

参考

https://www.jaredsec.com/atcoding/

https://ieeexplore.ieee.org/document/1163549