TH42137B - Detection of trajectory and echo in telephone systems - Google Patents

Abstract

The DC60 (12/01/41) double interrupt and echo detectors are provided for use in the machine. Eliminate the reflected signal. Determine whether the residual signal is controlled by an echo or "near end" signal. In order to make this determination, the first measure of self-independence. Itself will be Calculated between the residual signal and the approximate resonance signal, the second measurement of self-independence was calculated. Between the residual signal and the desired signal, the two outputs were compared. And if they are roughly the same level, then no further action is required. However, if the analogy determines that no. Independent during the falling signal Freezes and the desired signal is stronger The independence between the residual signal and the resonance approximation then the invention detectors assumed. That a double insertion signal has been detected and Signs showing results Such is the output. On the other side If independence During the signal fall Freezes and the desired signal is weaker than the There is no greater independence between the residual signal and the reflected signal approximation. Such detectors are assumed to be A change in the trajectory was detected. Of the echo and the signal Represents the above output, output In such a way, reliable methods and equipment And computational efficiency will be prepared for Provide information that is Benefits to the echo suppressor About changes in the trajectory of double insertion and signal Reflection that has happened Double interruption and echo detectors are provided for use in echo suppressors that operate Determine about whether the residual signal is regulated by the signal. Reflection or signal "Near end" or not, in order to determine the first measure of self-independence, it will be determined. Calculated between the residual signal and the approximate resonance signal, the second measurement of self-independence was calculated. Between the residual signal and the desired signal. Can result in two words Get a comparison And if they are roughly the same level, then no further action is required. However, if the analogy determines that no. Independent between the residual and the stronger signals The independence between the residual signal and the resonance approximation then the invention detectors assumed. That a double interruption has been detected and a signal that indicates the result Such is the output. On the other side If independence Between the residual signal and the desired signal is weaker than the There is no independent between the residual signal and the approximate value of the signal. Already reflected Such detectors are assumed to be A change in the trajectory of the echo and the Represents the above output, output In such a way Reliable methods and equipment And computational efficiency will be prepared for Provide useful information to the resonator. About changes in the trajectory of double insertion and signal Reflection that has happened

Claims (1)

1.Double insertion and echo trajectory change detectors Which consists of The first unit of measure for Self-determines the independence between the signal input signal. First and second signal input signal The second unit of measure for determining the independence in Itself between the first signal input signal and the third signal input signal.The comparator circuit for comparing the independent in Myself, the first value, as already mentioned, with the independence itself. The second as already mentioned And produces an output signal and a start-stop unit for comparing the output signal. As mentioned above with the previously set entry point level. The first level and the starting point level set before the level. Second, and thus represents the occurrence of a change in the interpolation trajectory. The pair and the echo trajectory change, respectively. 2. The detector of the double insertion and echo of claim 1, where the first unit of measure mentioned above It consists of a unit of measure, a function of coefficient 3. a detectors of double insertion and echo of claim 1, where the second unit of measure mentioned above. It consists of a unit of measure, function, syntax 4. Double interpolation detector and echo of claim 1, where the first signal input is above. It consists of a residual signal 5. Double interruption detector and an echo of claim No. 1 where the first signal input signal mentioned It consists of a residual signal 6. Double interruption detector and an echo of claim 1, where the third signal input signal as mentioned above. It consists of the desired signal. 7. The double interruption detector and the echo of claim 1 also includes a timer for inactivation. Link the signal between the aforementioned comparator circuits and The aforementioned switching start point unit during a predetermined period. 8. Methods for detecting interference trajectory changes. Pair and echo in telephone systems It consists of the following steps: calculating the self-independence between the input signals. First signal and second signal input Calculation of self-independence between input signals First signal and third signal input Self-independent comparison of the first mentioned values And then with the independence of itself, the second of the above values. And produce signal output by means of comparing machines The detector is fundamental and compares the aforementioned output signal to the point level. Start of the preset transitions before the first level and the beginning level. Change previously set to the second level and thus represents the There is a change in the double interleaving path and the change in the echo trajectory, respectively. 9. Method of claim 8. Then of calculating the independence itself, the first value consists of Procedure for Calculating the Joint Function First 1 0. Method of Clause 8, whereby the procedure mentioned Then of calculating the independence in itself, the second value is compounded. The procedure for calculating the second conjunction function 1 1. Method of claim 8, where the signal output at As mentioned above, it consists of test variables (11 claims, 2 pages, 2 pictures).