Julian Penketh

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For increased bandwidth savings in packet networks, speech compression algorithms are applied to reduce the amount of data that needs to be transferred to adequately reconstruct a telephone signal at the receiver. However, such algorithms do not process pure tones (such as dual-tone multi-frequency (DTMF)) with high fidelity, hence all signalling tones must(More)
For increased bandwidth savings in packet networks, speech compression algorithms are applied to reduce the amount of data that needs to be transferred to adequately reconstruct a telephone signal at the receiver. However, such algorithms do not process pure tones (such as dual-tone multi-frequency (DTMF)) with high fidelity, hence such in-band signalling(More)
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