Patent ID: 7136434

Claim:
An apparatus for detecting an energy of tone signals, comprising: a delay unit for outputting absolute values of transmitted samples after delaying the absolute values according to a predetermined delay interval; a first operation unit for calculating a first operation value by squaring an absolute value of a sample of a reference position input from the delay unit; a second operation unit for calculating a second operation value by multiplying each absolute value of a plurality of samples, transmitted before and after the sample of the reference position, input from the delay unit; a third operation unit for calculating a third operation value by subtracting the second operation value from the first operation value; and a detection unit for performing a burst detection according to a detection of peak outputs corresponding to the number of the samples transmitted before the sample of the reference position, based on the third operation value, wherein the second operation unit comprises a fourth operation unit for calculating a fourth operation value by multiplying each absolute value of the plurality of samples, transmitted before the sample of the reference position, input from the delay unit; a fifth operation unit for calculating a fifth operation value by multiplying each absolute value of the plurality of samples, transmitted after the sample of the reference position, input from the delay unit; and a sixth operation unit for multiplying the fourth operation value by the fifth operation value to produce the second operation value.