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US 8,295,476 B2Granted
Echo canceller and echo cancellation method
AssigneeIC Plus Corp.
InventorTsu-Chun Liu
Life of this patent
Estimating the term…
Abstract
An echo canceller and an echo cancellation method are provided. In the echo cancellation method, a transmitting data sequence is received, and M taps are provided accordingly. In addition, the M taps are received, and N taps are output according to an echo distribution information, in which the M and N are natural numbers, and M>N. Besides, the N taps are multiplied by N tap coefficients respectively to generate N products. Further, the N products are summed up to generate an echo cancellation signal. Thereby, the cost of the echo cancellation is decreased.
Claims9
An echo canceller (EC), comprising:
- a delay module, comprising a plurality of delay units sequentially connected in series, for receiving a transmitting data sequence so as to provide M taps accordingly;
- a selection connector, coupled to the delay module, for receiving the M taps and outputting N taps according to an echo distribution information, wherein M, N are natural numbers, and M>N;
- a multiplication module, coupled to the selection connector, for multiplying the N taps by corresponding N tap coefficients respectively to generate N products;
- and
- an adder, coupled to the multiplication module, for summing up the N products to generate an echo cancellation signal.
2 more elements
An echo cancellation method, comprising:
- receiving a transmitting data sequence, and providing M taps accordingly;
- receiving the M taps, and outputting N taps according to an echo distribution information, wherein M, N are natural numbers, and M>N;
- multiplying the N taps by corresponding N tap coefficients respectively to generate N products;
- and
- summing up the N products to generate an echo cancellation signal.
2 more elements
Dependencies are inferred from the claim text.