TWI396396B - Noise detecting device - Google Patents

Description

Voice noise detection device

The present invention relates to a voice noise detecting apparatus and a voice noise detecting method using the same.

The cable modem (Cable Modem) is a device connected between the phone and the communication network for processing the conversion of the radio analog signal and the digital network signal. Therefore, the quality of the cable data machine is directly determined. The quality of the call.

The cable data machine includes a processor and a Subscriber Line Interface Circuit (SLIC). In the conventional use, in order to ensure that no echo is generated during a call, the impedance of the subscriber line interface circuit It is the same as the impedance of the phone. However, when there is noise in the phone during the call, the cable modem cannot collect the relevant data for analysis to detect the noise existing during the call, but needs to use other auxiliary detection devices to perform the entire communication system. Detection leads to a rather complicated process.

In view of this, it is necessary to provide a voice noise detecting device for self-detecting noise and a voice noise detecting method using the same.

A voice noise detecting device includes a cable data machine and a phone connected to the cable data machine; the cable data machine includes a processor and a subscriber line interface circuit connected to the processor The processor includes a storage module, a control module, an analysis module, and a determination module; the storage module stores different phone impedances in different countries; and the control module is stored in the storage module. The stored phone impedance is sequentially given to the subscriber line interface circuit, and the subscriber line interface circuit is enabled. The impedance is different from the impedance of the phone, providing an output frequency to the phone and causing the phone to emit a sound; the analysis module receives the echo fed back from the phone, and analyzes the frequency of the noise in the echo; the determining module The frequency of the noise is compared with a pre-stored limit frequency, and when the frequency of the noise is less than the limit frequency, the cable data machine is qualified.

A voice noise detection method includes the steps of: providing a cable data machine and a phone connected to the cable data machine, the cable data machine comprising a processor and a processor connected a subscriber line interface circuit; giving the subscriber line interface circuit different telephone impedances in different countries, so that the impedance of the subscriber line interface circuit is different from the impedance of the telephone; the processor provides an output frequency to the telephone and makes the telephone emit a sound; the processor Receiving the echo from the phone feedback, and analyzing the frequency of the noise in the echo to determine whether the cable modem is qualified.

Compared with the prior art, the present invention analyzes the impedance of the subscriber line interface circuit and makes it different from the impedance of the telephone, and then analyzes the noise in the echo generated by the dialogue machine due to the impedance difference to determine the cable. Whether the data machine is qualified or not, the self-detection of noise is realized.

10‧‧‧Vehicle noise detection device

11‧‧‧Cable data machine

111‧‧‧Memory Module

112‧‧‧Control Module

113‧‧‧Analysis module

114‧‧‧Judgement module

12‧‧‧User Line Interface Circuit

20‧‧‧Phone

FIG. 1 is a schematic diagram of a hardware architecture of a voice noise detecting apparatus according to an embodiment of the present invention.

FIG. 2 is a system flowchart of a voice noise detection method provided by an embodiment of the present invention.

The technical solution will be further described in detail below with reference to the accompanying drawings and embodiments.

Referring to FIG. 1 , a voice noise detecting apparatus 100 according to an embodiment of the present invention includes a cable data machine 10 and a telephone 20 connected to the cable data machine 10 .

The cable modem 10 includes a processor 11 and a subscriber line interface circuit 12. The subscriber line interface circuit 12 is coupled between the processor 11 and the telephone 20. The processor 11 can assign different impedance to the subscriber line interface circuit 12. When the impedance of the subscriber line interface circuit 12 is different from the impedance of the telephone 20, the telephone 20 generates an echo during the call, and the processor 11 receives Echo and analyze the noise in the echo.

The processor 11 includes a storage module 111, a control module 112, an analysis module 113, and a determination module 114. The storage module 111, the analysis module 113, and the determination module 114 are respectively associated with the control module. The group 112 is connected, and the analysis module 113 is connected to the determination module 114.

The storage module 111 stores different phone impedances of different countries. The telephone impedance of telephones 20 in different countries in the world is different, and the telephone impedance of telephone 20 is generally a specific impedance set according to the standards of the country in which it is located.

The control module 112 is configured to adjust the impedance of the subscriber line interface circuit 12 according to the impedance of the telephones stored in the storage module 111, so that the impedance of the subscriber line interface circuit 12 is different from the impedance of the telephone 20; and provide an output frequency. The telephone 20 causes the telephone 20 to make a sound. In the present embodiment, the initial output frequency set at the time of the initial test is 20 Hz.

The analysis module 113 receives the echo fed back from the phone 20 and performs Fourier analysis on the noise in the echo to determine the frequency of the noise present in the echo. It can be understood that other noise noise analysis methods can also be used to analyze the noise in the echo, for example, subspace analysis.

The determining module 114 compares the frequency of the noise with a preset limit frequency. When the noise frequency exceeds the limit frequency, the cable modem 10 is deemed to be unqualified and the test is stopped. When the noise frequency does not exceed the limit frequency, it is determined whether the output frequency of the control module 112 exceeds a pre-stored maximum frequency. If the output frequency does not exceed the highest frequency, the control module 112 increases the output frequency and analyzes The module 113 collects the echo again, and the echo is mixed. The frequency of the signal is analyzed. When the frequency of the noise in the echo is greater than the limit frequency, it is directly determined that the cable modem 10 is unqualified and stops testing; when the frequency of the noise in the echo is less than the limit frequency, it is increased again. Output frequency. If the output frequency increases beyond the maximum frequency, it is determined whether the control module 112 gives the telephone impedance of the countries in the storage module 111 to the subscriber line interface circuit 12. If the subscriber line interface circuit 12 is not tested for the telephone impedance of all countries, the control module 112 tests the subscriber line interface circuit 12 for the impedance of the telephone of another country, and the control module 112 again starts from The output frequency continuously increases the output frequency to cause the phone 20 to generate an echo, and then analyzes the noise in the echo. When the frequency of the noise exceeds the limit frequency, it is determined that the cable modem 10 is unqualified and stops testing it. When all the noise generated is less than the limit frequency, the judging module 114 determines again whether the telephone impedance of each country in the storage module 111 is given to the subscriber line interface circuit 12. If the subscriber line interface circuit 12 has been assigned to the telephone impedance of all countries for testing, then the cable modem 10 is deemed to be qualified. In the present embodiment, the highest frequency is 3.5 KHz, and the output frequency is increased by 0.5 KHz each time.

By testing the cable modem 10 at various different sound frequencies and different impedances of different countries, it is ensured that the cable modem 10 does not generate noise at various sound frequencies, and the cable modem 10 and other countries When the telephone 20 is connected and used, it is qualified.

2 is a system flowchart of a method for detecting a voice noise according to an embodiment of the present invention, which includes the following steps:

S101: A cable data machine 10 and a telephone 20 connected to the cable data machine 10 are provided. The cable data machine 10 includes a processor 11 and a subscriber line interface circuit connected to the processor 11. 12.

S102: Give the subscriber line interface circuit 12 different telephone impedances in different countries, and make the impedance of the subscriber line interface circuit 12 different from the impedance of the telephone 20.

S103: The processor 11 provides an output frequency to the phone 20 to cause the phone 20 to emit a sound.

S104: The processor 11 receives the echo generated by the phone 20, and performs Fourier analysis on the echo to determine the frequency of the noise present in the echo.

S105: Determine whether the frequency of the noise exceeds a limit frequency, and the limit frequency is pre-stored in the processor 11, and the limit frequency is the highest value of the cable data machine 10 that is qualified.

S201: If the frequency of the noise in the echo exceeds the limit frequency, the cable modem 10 is a non-conforming product.

S106: If the frequency of the noise in the echo is within the limit frequency, compare the current output frequency of the processor 11 with a highest frequency to determine whether the output frequency exceeds the highest frequency. In the test process, in order to make the noise generated by the phone 20 under various conditions meet the requirements, it is necessary to analogize the sound of different frequencies and detect the noise generated under the sound of this frequency. In the present embodiment, the highest frequency is 3.5 KHz.

S301: When the output frequency does not exceed the highest frequency, the processor 11 is controlled to increase the output frequency, and then returns to S103. In the present embodiment, the output frequency is increased by 0.5 KHz each time.

S107: When the output frequency has exceeded the highest frequency, it is determined whether the subscriber line interface circuit 12 has been given different phone impedances in all countries, and a noise test is performed. In order to improve the accuracy of the detection as much as possible, and to make the cable modem 10 qualified when using other phones 20 having different impedances, it is necessary to respectively assign different impedances to the subscriber line interface circuit 12 to ensure the subscriber line. The interface circuit 12 and the telephone 20 are qualified under various conditions in which the impedances are different.

S401: When the subscriber line interface circuit 12 is not given the different telephone impedances of all countries, the impedance value of the subscriber line interface circuit 12 is adjusted to be the same as the specific impedance of the other country telephone 20, and then returns to S102.

S108: When the subscriber line interface circuit 12 has been given different telephone impedances in all countries, and all of the noise frequencies are less than the limit frequency, then the cable modem 10 is determined to be a qualified product.

The invention adjusts the impedance of the subscriber line interface circuit and makes it different from the impedance of the telephone, and then analyzes the noise in the echo generated by the dialogue machine due to the impedance difference to determine whether the cable data machine is qualified or not. Self-detection of noise.

In summary, the present invention has indeed met the requirements of the invention patent, and has filed a patent application according to law. However, the above description is only a preferred embodiment of the present invention, and it is not possible to limit the scope of the patent application of the present invention. Equivalent modifications or variations made by persons skilled in the art in light of the spirit of the invention are intended to be included within the scope of the following claims.

10‧‧‧Vehicle noise detection device

11‧‧‧Cable data machine

111‧‧‧Memory Module

112‧‧‧Control Module

113‧‧‧Analysis module

114‧‧‧Judgement module

12‧‧‧User Line Interface Circuit

20‧‧‧Phone

Claims (10)

A voice noise detecting device includes a cable data machine and a phone connected to the cable data machine; the cable data machine includes a processor and a subscriber line interface circuit connected to the processor The processor includes a storage module, a control module, an analysis module, and a determination module; the storage module stores different phone impedances in different countries; and the control module is stored in the storage module. The stored phone impedance is sequentially given to the user line interface circuit, and the impedance of the subscriber line interface circuit is different from the impedance of the phone, providing an output frequency to the phone and making the phone sound; the analysis module receives the echo from the phone feedback And analyzing the frequency of the noise in the echo; the determining module compares the frequency of the noise with a pre-stored limit frequency, and when the frequency of the noise is less than the limit frequency, the cable data machine is qualified. . The voice noise detecting device of claim 1, wherein the determining module is further configured to determine whether the output frequency is greater than a preset maximum frequency, and if the output frequency is less than the highest frequency, the control module is increased. Output frequency. The voice noise detecting device of claim 2, wherein: the determining module is further configured to determine whether the control module has given different impedances of the telephone to the subscriber line interface circuit, if not used all The national telephone impedance, the control module adjusts the impedance of the subscriber line interface circuit to another telephone impedance within the storage module. A voice noise detection method includes the steps of: providing a cable data machine and a phone connected to the cable data machine, the cable data machine comprising a processor and a processor connected a subscriber line interface circuit; giving the subscriber line interface circuit different telephone impedances in different countries, so that the impedance of the subscriber line interface circuit is different from the impedance of the telephone; the processor provides an output frequency to the telephone and makes the telephone emit a sound; The processor receives the echo returned from the phone and analyzes the frequency of the noise in the echo to determine whether the cable modem is qualified. The voice noise detecting method of claim 4, wherein when the frequency of the noise is greater than a limit frequency, determining that the cable data machine is a non-conforming product. The voice noise detecting method of claim 4, wherein when the frequency of the noise is less than a limit frequency, it is determined whether the output frequency of the processor is greater than a highest frequency. The voice noise detection method of claim 6, wherein: when the output frequency of the processor is less than the highest frequency, after increasing the output frequency, the noise in the echo is analyzed again to determine the cable data. Is the machine qualified? The voice noise detection method of claim 6, wherein: when the output frequency of the processor is greater than the highest frequency, whether the user line interface circuit has been given different phone impedances in all countries, and Noise test. The method for detecting a voice noise according to claim 8 is characterized in that: when the subscriber line interface circuit is not given a different telephone impedance in all countries, the subscriber line impedance circuit is again given the impedance of the telephone of another country, and then a Output frequency to the phone and make the phone sound, then analyze the noise in the echo to determine whether the cable data machine is qualified. The voice noise detecting method according to claim 8, wherein: when the subscriber line interface circuit has been given different telephone impedances in all countries, and all the noise frequencies are less than the limit frequency, the line is determined. The cable modem is a good product.