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RU96114996A - METHOD AND SYSTEM FOR STRENGTHENING VOICE SIGNAL IN COMMUNICATION NETWORK - Google Patents

METHOD AND SYSTEM FOR STRENGTHENING VOICE SIGNAL IN COMMUNICATION NETWORK

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Publication number
RU96114996A
RU96114996A RU96114996/09A RU96114996A RU96114996A RU 96114996 A RU96114996 A RU 96114996A RU 96114996/09 A RU96114996/09 A RU 96114996/09A RU 96114996 A RU96114996 A RU 96114996A RU 96114996 A RU96114996 A RU 96114996A
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speech signal
input
scaling
output
signal
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RU96114996/09A
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Russian (ru)
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RU2142675C1 (en
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Шунои Хо Хелена
К.Пратт Майкл
С.Лим Понг
Т.Ошидари Томас
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ДиЭсСи Коммуникэйшнс Корпорэйшн
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Priority claimed from US08/161,120 external-priority patent/US5471527A/en
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1. Способ усиления речевого сигнала в сети связи, отличающийся тем, что он предусматривает проведение следующих операций: определение средней мощности входного речевого сигнала; определение коэффициента масштабирования в соответствии со средней мощностью входного речевого сигнала; эквалайзирование входного речевого сигнала путем ослабления заданного участка частот входного речевого сигнала; масштабирование эквалайзированного входного речевого сигнала при помощи коэффициента масштабирования и подключение масштабированного речевого сигнала к выходу.1. A method of amplifying a speech signal in a communication network, characterized in that it provides for the following operations: determining the average power of the input speech signal; determination of the scaling factor in accordance with the average power of the input speech signal; equalization of the input speech signal by attenuating a predetermined portion of the frequency of the input speech signal; scaling the equalized input speech signal using the scaling factor and connecting the scaled speech signal to the output. 2. Способ по п. 1, отличающийся тем, что он предусматривает проведение следующих дополнительных операций: обнаружение во входном сигнале данных, передаваемых в полосе речевого сигнала, и отключение масштабированного речевого сигнала от выхода. 2. The method according to p. 1, characterized in that it provides for the following additional operations: detection in the input signal of data transmitted in the band of the speech signal, and disconnecting the scaled speech signal from the output. 3. Способ по п. 1, отличающийся тем, что он предусматривает проведение следующих дополнительных операций: обнаружение каскадного усиления в сети и отключение масштабированного речевого сигнала от выхода. 3. The method according to p. 1, characterized in that it provides for the following additional operations: detection of cascade amplification in the network and disconnecting the scaled speech signal from the output. 4. Способ по п. 1, отличающийся тем, что он предусматривает проведение следующих дополнительных операций: обнаружение во входном сигнале по меньшей мере или данных, передаваемых в полосе речевого сигнала, или каскадного усиления в сети; отключение масштабированного речевого сигнала от выхода. 4. The method according to p. 1, characterized in that it provides for the following additional operations: detection in the input signal of at least either data transmitted in the band of the speech signal, or cascade amplification in the network; disconnecting the scaled speech signal from the output. 5. Способ по п. 1, отличающийся тем, что указанные операции определения средней мощности, коэффициента масштабирования, эквалайзирование, масштабирование и отключение производятся к эхоподавителе сети связи. 5. The method according to p. 1, characterized in that said operations of determining the average power, scaling factor, equalization, scaling and disconnection are performed to the echo canceller of the communication network. 6. Способ по п. 1, отличающийся тем, что заданный участок частот входного речевого сигнала лежит выше 300 Гц. 6. The method according to p. 1, characterized in that the predetermined frequency section of the input speech signal lies above 300 Hz. 7. Способ по п. 1, отличающийся тем, что заданный участок частот входного речевого сигнала лежит выше 400 Гц. 7. The method according to p. 1, characterized in that the predetermined frequency section of the input speech signal lies above 400 Hz. 8. Способ по п. 1, отличающийся тем, что указанная операция масштабирования входного сигнала дополнительно предусматривает использование заранее определенного коэффициента масштабирования, для масштабирования эквалайзированного входного сигнала в течение определенного периода времени. 8. The method according to p. 1, characterized in that the specified operation of scaling the input signal further provides for the use of a predetermined scaling factor to scale the equalized input signal over a certain period of time. 9. Способ по п. 1, отличающийся тем, что он предусматривает проведение следующих дополнительных операций: разделение входного речевого сигнала на множество кадров, причем каждый кадр представляет собой определенный промежуток времени; масштабирование эквалайзированного входного сигнала при помощи коэффициента масштабирования в течение заданного числа кадров. 9. The method according to p. 1, characterized in that it provides for the following additional operations: dividing the input speech signal into multiple frames, each frame representing a certain period of time; scaling the equalized input signal using a scaling factor over a given number of frames. 10. Способ по п. 1, отличающийся тем, что указанное определение коэффициента масштабирования дополнительно предусматривает проведение операции ограничения количества изменений между последовательными коэффициентами масштабирования. 10. The method according to p. 1, characterized in that the definition of the scaling factor further provides for the operation of limiting the number of changes between successive scaling factors. 11. Способ по п. 1, отличающийся тем, что указанная операция эквалайзирования дополнительно предусматривает проведение фильтрации
входного сигнала, таким образом, что мощность входного сигнала выше заданной частоты ослабляется.11. The method according to p. 1, characterized in that said equalization operation further comprises filtering
input signal, so that the power of the input signal above a given frequency is attenuated. 12. Способ по п. 1, отличающийся тем, что указанная операция определения средней мощности дополнительно предусматривает проведение фильтрации нижних частот выпрямленного входного речевого сигнала. 12. The method according to p. 1, characterized in that the said operation of determining the average power additionally provides for low-pass filtering of the rectified input speech signal. 13. Способ по п. 1, отличающийся тем, что он предусматривает проведение следующих дополнительных операций: измерение мощности входного сигнала ниже и выше заданной частоты; сравнение результатов измерения мощности с данными мощности, ожидаемыми для ранее масштабированного сигнала, и отключение масштабированного речевого сигнала от выхода по результатам указанной операции сравнения. 13. The method according to p. 1, characterized in that it provides for the following additional operations: measuring the power of the input signal below and above a given frequency; comparing the power measurement results with the power data expected for a previously scaled signal, and disabling the scaled speech signal from the output based on the results of the specified comparison operation. 14. Способ по п. 1, отличающийся тем, что он предусматривает проведение следующих дополнительных операций: разделение входного речевого сигнала на множество кадров, причем каждый кадр представляет собой определенный промежуток времени; непрерывное осуществление операций указанного определения средней мощности, коэффициента масштабирования, эквалайзирования, масштабирования и отключения, по истечении заданного числа кадров. 14. The method according to p. 1, characterized in that it provides for the following additional operations: dividing the input speech signal into multiple frames, each frame representing a certain period of time; continuous operations of said determination of average power, scaling factor, equalization, scaling and shutdown, after a specified number of frames. 15. Способ по п. 1, отличающийся тем, что он предусматривает проведение следующих дополнительных операций: определение периодов молчания во входном речевом сигнале на входе и отключение масштабированного речевого сигнала от выхода. 15. The method according to p. 1, characterized in that it provides for the following additional operations: determining periods of silence in the input speech signal at the input and disconnecting the scaled speech signal from the output. 16. Способ по п. 15, отличающийся тем, что он дополнительно предусматривает проведение операции ослабления входного речевого сигнала, таким образом, чтобы уровень шума в течение обнаруженных периодов молчания был минимальным. 16. The method according to p. 15, characterized in that it further provides for the operation of attenuating the input speech signal, so that the noise level during the detected periods of silence is minimal. 17. Способ усиления речевого сигнала в сети связи, отличающийся тем, что он предусматривает проведение следующих операций: определение средней мощности входного речевого сигнала; определение коэффициента масштабирования в соответствии со средней мощностью входного речевого сигнала; эквалайзирование входного речевого сигнала путем ослабления заданного участка частот входного речевого сигнала; масштабирование эквалайзированного входного речевого сигнала при помощи коэффициента масштабирования; подключение масштабированного речевого сигнала к выходу и обнаружение во входном сигнале по меньшей мере или данных, передаваемых в полосе речевого сигнала, или обнаружение каскадного усиления в сети и отключение масштабированного речевого сигнала от выхода. 17. A method of amplifying a speech signal in a communication network, characterized in that it provides for the following operations: determining the average power of the input speech signal; determination of the scaling factor in accordance with the average power of the input speech signal; equalization of the input speech signal by attenuating a predetermined portion of the frequency of the input speech signal; scaling the equalized input speech signal using a scaling factor; connecting the scaled speech signal to the output and detecting in the input signal at least either the data transmitted in the speech signal band, or detecting cascade amplification in the network and disconnecting the scaled speech signal from the output. 18. Способ по п. 17, отличающийся тем, что указанные операции определения средней мощности, коэффициента масштабирования, эквалайзирование, масштабирование и отключение производятся в эхоподавителе сети связи. 18. The method according to p. 17, characterized in that said operations of determining the average power, scaling factor, equalization, scaling and shutdown are performed in the echo canceller of the communication network. 19. Способ по п. 17, отличающийся тем, что заданный участок частот входного речевого сигнала лежит выше 300 Гц. 19. The method according to p. 17, characterized in that the predetermined frequency section of the input speech signal lies above 300 Hz. 20. Способ по п. 17, отличающийся тем, что он предусматривает проведение следующих дополнительных операций:
разделение входного речевого сигнала на множество кадров, причем каждый кадр представляет собой определенный промежуток времени; масштабирование эквалайзированного входного сигнала при помощи коэффициента масштабирования в течение заданного числа кадров.20. The method according to p. 17, characterized in that it provides for the following additional operations:
dividing the input speech signal into multiple frames, and each frame represents a certain period of time; scaling the equalized input signal using a scaling factor over a given number of frames. 21. Способ по п. 17, отличающийся тем, что он предусматривает проведение следующих дополнительных операций: разделение входного речевого сигнала на множество кадров, причем каждый кадр представляет собой определенный промежуток времени; непрерывное осуществление операций указанного определения средней мощности, коэффициента масштабирования, эквалайзирования, масштабирования и отключения, по истечении заданного числа кадров. 21. The method according to p. 17, characterized in that it provides for the following additional operations: dividing the input speech signal into multiple frames, each frame representing a certain period of time; continuous operations of said determination of average power, scaling factor, equalization, scaling and shutdown, after a specified number of frames. 22. Способ по п. 17, отличающийся тем, что он предусматривает проведение следующих дополнительных операций: обнаружение периодов молчания во входном речевом сигнале на входе и отключение масштабированного речевого сигнала от выхода. 22. The method according to p. 17, characterized in that it provides for the following additional operations: detecting periods of silence in the input speech signal at the input and disconnecting the scaled speech signal from the output. 23. Способ по п. 22, отличающийся тем, что он дополнительно предусматривает проведение операции ослабления входного речевого сигнала, таким образом, чтобы уровень обнаруженных периодов молчания был минимален. 23. The method according to p. 22, characterized in that it further provides for the operation of attenuating the input speech signal, so that the level of detected periods of silence is minimal. 24. Система для усиления речевого сигнала в сети связи, отличающаяся тем, что она содержит: усреднитель мощности для определения средней мощности речевого сигнала; эквалайзер для ослабления заданного участка речевого сигнала и
выходной преобразователь масштаба для умножения речевого сигнала после эквалайзера на коэффициент масштабирования, выбранный в соответствии с измеренной средней мощностью.24. A system for amplifying a speech signal in a communication network, characterized in that it comprises: a power averager for determining the average power of the speech signal; an equalizer to attenuate a given portion of the speech signal and
an output scale converter for multiplying the speech signal after the equalizer by a scaling factor selected in accordance with the measured average power. 25. Система по п. 24, отличающаяся тем, что она дополнительно содержит датчик данных, передаваемых в полосе речевого сигнала, для обнаружения данных передаваемых в полосе речевого сигнала, предотвращающий при этом масштабирование речевого сигнала указанным выходным преобразователем масштаба. 25. The system according to p. 24, characterized in that it further comprises a sensor of data transmitted in the band of the speech signal, for detecting data transmitted in the band of the speech signal, while preventing the scaling of the speech signal by the specified output scale Converter. 26. Система по п. 24, отличающаяся тем, что она дополнительно содержит датчик каскадного усиления речевого сигнала, предназначенный для обнаружения предшествующего масштабирования речевого сигнала, и в случае указанного обнаружения предотвращающий масштабирование речевого сигнала указанным выходным преобразователем масштаба. 26. The system according to p. 24, characterized in that it further comprises a cascade amplification of the speech signal, designed to detect previous scaling of the speech signal, and in the case of the specified detection prevents scaling of the speech signal by the specified output scale Converter. 27. Система по п. 24, отличающаяся тем, что она дополнительно содержит датчик данных, передаваемых в полосе речевого сигнала; датчик каскадного усиления речевого сигнала, предназначенный для обнаружения предшествующего масштабирования речевого сигнала; при этом в том случае, когда по меньшей мере указанный датчик данных, передаваемых в полосе речевого сигнала, или указанный датчик каскадного усиления речевого сигнала срабатывает, предотвращается масштабирование речевого сигнала указанных выходным преобразователем масштаба. 27. The system according to p. 24, characterized in that it further comprises a sensor of data transmitted in the band of the speech signal; a cascaded speech amplification sensor for detecting previous scaling of a speech signal; in this case, when at least the specified sensor of data transmitted in the speech signal band, or the specified cascade amplification of the speech signal is triggered, the scaling of the speech signal indicated by the output scale converter is prevented. 28. Система по п. 24, отличающаяся тем, что указанные усреднитель мощности, эквалайзер и выходной преобразователь масштаба расположены в эхоподавителе сети связи. 28. The system of claim 24, wherein said power averager, equalizer and output scale converter are located in the echo canceller of the communication network. 29. Система по п. 24, отличающаяся тем, что заданный участок частот входного речевого сигнала, ослабляемый указанным эквалайзером, лежит главным образом выше 300 Гц. 29. The system of claim 24, wherein the predetermined frequency portion of the input speech signal attenuated by said equalizer lies mainly above 300 Hz. 30. Система по п. 24, отличающаяся тем, что заданный участок частот входного речевого сигнала, ослабляемый указанным эквалайзером, лежит главным образом выше 400 Гц. 30. The system of claim 24, wherein the predetermined frequency portion of the input speech signal attenuated by said equalizer lies mainly above 400 Hz. 31. Система по п. 24, отличающаяся тем, что указанный выходной преобразователь масштаба осуществляет умножение речевых сигналов на заранее определенный коэффициент масштабирования в течение определенного периода времени. 31. The system of claim 24, wherein said output scale converter multiplies the speech signals by a predetermined scaling factor over a specific period of time. 32. Система по п. 24, отличающаяся тем, что указанный выходной преобразователь масштаба дополнительно осуществляет разделение речевого сигнала на множество кадров, каждый из которых представляет собой определенный период времени, и производит масштабирование речевого сигнала в течение определенного числа кадра. 32. The system according to p. 24, characterized in that the specified output scale Converter additionally performs the separation of the speech signal into many frames, each of which represents a certain period of time, and scaling the speech signal for a certain number of frames. 33. Система по п. 24, отличающаяся тем, что указанный выходной преобразователь масштаба дополнительно осуществляет ограничение количества изменений между последовательными коэффициентами масштабирования. 33. The system according to p. 24, characterized in that the specified output scale Converter additionally limits the number of changes between successive scaling factors. 34. Система по п. 24, отличающаяся тем, что указанный эквалайзер представляет собой цифровой фильтр, который фильтрует речевой сигнал выше заданной частоты. 34. The system of claim 24, wherein said equalizer is a digital filter that filters a speech signal above a predetermined frequency. 35. Система по п. 24, отличающаяся тем, что указанный усреднитель мощности содержит фильтр нижних частот. 35. The system of claim 24, wherein said power averager comprises a low pass filter. 36. Система по п. 24, отличающаяся тем, что она дополнительно содержит таблицу преобразования усиление/ослабление для выработки коэффициента масштабирования, который используется в указанном выходном преобразователе масштаба для масштабирования речевого сигнала. 36. The system according to p. 24, characterized in that it further comprises a gain / attenuation conversion table for generating a scaling factor that is used in said output scale converter to scale the speech signal. 37. Система по п. 24, отличающаяся тем, что она дополнительно содержит таблицу преобразования усиление/ослабление для выработки коэффициента масштабирования, который используется в указанном выходном преобразователе масштаба для масштабирования речевого сигнала, причем указанная таблица преобразования усиление/ослабление устроена таким образом, что речевым сигналам малой мощности присваиваются высокие коэффициенты масштабирования, а речевым сигналам высокой мощности присваиваются низкие или отрицательные коэффициенты масштабирования. 37. The system according to p. 24, characterized in that it further comprises a gain / attenuation conversion table for generating a scaling factor that is used in said output scale converter to scale the speech signal, said gain / attenuation conversion table being arranged so that the speech low power signals are assigned high scaling factors, and high power speech signals are assigned low or negative scaling factors Niya. 38. Система по п. 24, отличающаяся тем, что она дополнительно содержит прозрачный тракт для непосредственной передачи входного речевого сигнала на выход таким образом, что входной речевой сигнал не подвергается масштабированию, и аттенюатор, встроенный в этот прозрачный тракт для того, чтобы производить переменное ослабление входных сигналов низкого уровня, в которых отсутствуют речевые сигналы. 38. The system according to p. 24, characterized in that it further comprises a transparent path for directly transmitting the input speech signal to the output in such a way that the input speech signal is not scaled, and an attenuator built into this transparent path in order to produce a variable attenuation of input signals of a low level in which there are no speech signals. 39. Система для усиления речевого сигнала в сети связи, отличающаяся тем, что она содержит вход для приема речевого сигнала; выход для передачи речевого сигнала и соединительное устройство между указанными входом и выходом, содержащее усилитель речевого сигнала, причем этот усилитель включает в себя усреднитель мощности для определения средней мощности речевого сигнала;
эквалайзер для ослабления заданного участка речевого сигнала и выходной преобразователь масштаба для умножения речевого сигнала после эквалайзера на коэффициент масштабирования, выбранный в соответствии с измеренной средней мощностью.39. A system for amplifying a speech signal in a communication network, characterized in that it comprises an input for receiving a speech signal; an output for transmitting a speech signal and a connecting device between said input and output, comprising a speech amplifier, the amplifier including a power averager for determining an average power of the speech signal;
an equalizer for attenuating a given portion of the speech signal; and an output scale converter for multiplying the speech signal after the equalizer by a scaling factor selected in accordance with the measured average power. 40. Система по п. 39, отличающаяся тем, что она дополнительно содержит датчик данных, передаваемых в полосе речевого сигнала, для обнаружения данных, передаваемых в полосе речевого сигнала, и для отключения указанного преобразователя масштаба от указанного выхода. 40. The system according to p. 39, characterized in that it further comprises a sensor of data transmitted in the band of the speech signal, for detecting data transmitted in the band of the speech signal, and to disconnect the specified scale Converter from the specified output. 41. Система по п. 39, отличающаяся тем, что она дополнительно содержит датчик каскадного усиления речевого сигнала, для обнаружения предшествующего масштабирования речевого сигнала и для отключения указанного преобразователя масштаба от указанного выхода. 41. The system according to p. 39, characterized in that it further comprises a cascade amplification of the speech signal, to detect previous scaling of the speech signal and to disconnect the specified scale Converter from the specified output. 42. Система по п. 39, отличающаяся тем, что она дополнительно содержит датчик данных, передаваемых в полосе речевого сигнала, для обнаружения данных, передаваемых в полосе речевого сигнала; датчик каскадного усиления речевого сигнала для обнаружения предшествующего масштабирования речевого сигнала, при этом в том случае, когда по меньшей мере один из указанных датчиков, а именно датчик данных, передаваемых в полосе речевого сигнала, или датчик каскадного усиления речевого сигнала, срабатывает, производится отключение указанного выходного преобразователя масштаба от указанного выхода. 42. The system according to p. 39, characterized in that it further comprises a sensor of data transmitted in the band of the speech signal for detecting data transmitted in the band of the speech signal; a speech cascade amplification sensor for detecting a previous scaling of a speech signal, in this case, when at least one of said sensors, namely a sensor of data transmitted in the speech signal band or a cascade speech amplification sensor, is activated, the indicated output scale converter from the specified output.
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