KR19980061228U - Test environment controller of vocoder card - Google Patents

Abstract

A memory for storing tone signals, a tone signal assigned by a user for each timeslot, and a processor for reading and outputting the same, comparing the same, and shifting the tone signals stored in the memory and outputting them to the vocoder card. A shift register and differential logic, a timeslot control section for controlling tone tones fed back from the vocoder card, a digital / analog converter for converting and outputting tone signals input from the timeslot control section to an analog signal, and a subscriber telephone. It consists of a serial link part connected to and can be installed in the empty slot of the test self, and it is free to add the test self and is less space-limited, and the tester can arbitrarily transmit the tone signal so that the sound quality is reliable. It provides a test environment control device of the vocoder card.

Description

Test environment controller of vocoder card

This design is related to the test environment control device of the vocoder card, and more specifically, it can be mounted and used in the empty slot of the test self, freely adding the test self and receiving less space, and allowing the tester to arbitrarily change the tone signal. The test environment control apparatus of the vocoder card, which can ensure the reliability of the sound quality by transmitting a.

When information is transmitted, the amount of information is reduced by removing the redundant information inherent in the information within the error of information loss, and it is called source coding, and when the source signal is performed on the speech signal, it is called speech coding. As a method of encoding a voice signal, there are a waveform coding method and a vocoder method.

The vocoder scheme described above is a method that can satisfy smaller transmission rate requirements and is based on a speech representation generated in an all pole model of a speech system. In general, the vocoder is divided into channel vocoder, cepstral vocoder, phase vocoder, formant vocoder, linear predictive vocoder, and so on. .

Since the vocoder is manufactured in the form of a card, it is called a vocoder card. In order to test a vocoder card produced in a production process, a vocoder card test environment control apparatus for forming and controlling a test environment is required.

Hereinafter, a conventional vocoder card test environment control apparatus will be described with reference to the accompanying drawings.

1 is a block diagram of a test environment control apparatus of a conventional vocoder card. As shown in FIG. 1, when a test environment control apparatus of a conventional vocoder card carries a specific PCM signal in a specific time slot to test the vocoder card 30 and transmits it to the input terminal Rx of the vocoder card 30. After the QCELP (Qualcomm Code Excited Linear Prediction) processing is performed on the vocoder card 30, the PCM signals fed back through the output terminal Tx are compared with each other. The test apparatus includes an SLC board for forming a voice call using a telephone, an LPSM (Line Processing Supervising Module) board for controlling various clock signals, sub-highway signals, and timeslots, and an MPSM (Main Process) for main control. Switching Module).

In the test apparatus 10, a telephone is connected to one subscriber through an SLC board, a clock signal necessary for synchronization is extracted, and then connected to a lower board, and then converted into a differential signal and inputted as a synchronization input signal of the vocoder card 30. Next, the LPSM board of the testing apparatus 10 controls the timeslot to transmit a specific tone to a specific sub-highway, and after receiving QCELP processing from the vocoder card 30, the feedback tone is received as a received signal of the sub-highway. The QCELP test of the vocoder card 30 is performed by applying a tone signal to the subscriber board to which the telephone is connected and receiving a tone from the tester.

The input tone signal for each channel of the vocoder card 30 is inputted differently by separating the time slots, and compares whether the corresponding tone signal is received through the same slot only when received by the test apparatus 10.

The QCELP processing method is one of CELP coding methods employing a method of varying the transmission coding rate for the energy and background noise of a speech section to be analyzed. The QCELP processing method takes a random codebook or a Gaussian random vector and uses it as an excitation source vector signal. Reproduces the pitch information of the analyzed voice signal by multiplying the gain by one vector signal and passing it through the pitch filter, and synthesizing the voice signal by reproducing the formant information by passing it through the synthesis filter. In this method, the voice output is made by passing the adaptive post filter.

However, such a test environment control apparatus of the conventional vocoder card has a different power supply from the test apparatus and the vocoder card's power, which causes a failure due to damage caused by the power of the lower board when the power is turned on and off. The fixed quality of the test tone is fixed, so that it is impossible to input a specific test tone arbitrarily, so that the reliability of the sound quality test cannot be improved. Since the test apparatus is used only for a specific shelf, the number of selfies can be increased without adding a separate test apparatus. There is a problem that the test can not be carried out, and the test device and the test self are separated so that the trouble of having to move the test device when moving the test self occurs.

The object of the present invention is to solve the conventional problems as described above, which can be mounted and used in an empty slot of a test self, free to add a test self and receive less space constraint, and allow the tester to arbitrarily change the tone signal. The present invention provides a test environment control apparatus for a vocoder card capable of transmitting a sound quality, thereby ensuring reliability of sound quality.

1 is a block diagram of a test environment control apparatus of a conventional vocoder card.

2 is a block diagram of a test environment control apparatus for a vocoder card according to an embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

DESCRIPTION OF SYMBOLS 10 Test apparatus 20 Clock distribution part 30 Vocoder card 40 Clock part 50 Process part 60, 80 Buffer 70 Memory 90 Shift register and differential logic 100 Time slot control 110 Differential logic 120 Digital / anal Log Converter 130: Serial Link Section

As a means for achieving the above object, the constitution of the present invention includes a memory in which a tone signal is stored, a processor unit for reading and outputting a tone signal assigned by a user for each time slot from the above memory, and comparing the same; A shift register and differential logic for shifting and outputting the tone signal stored in the vocoder card, a time slot controller for controlling a tone signal fed back from the vocoder card, and a tone signal input from the time slot controller. It consists of a digital / analog converter for converting and outputting a signal, and a serial link unit connected to an external telephone.

Hereinafter, the most preferred embodiments of the present invention will be described with reference to the accompanying drawings in order to be described in detail that can be easily carried out by those of ordinary skill in the art.

2 is a block diagram of a test environment control apparatus for a vocoder card according to an embodiment of the present invention. As shown in Fig. 2, the configuration of the test environment control apparatus for the vocoder card according to the embodiment of the present invention is a process that is connected to the clock unit 40 and the clock unit 40 for generating a clock signal. Section 50, buffers 60 and 80 for temporarily storing signals, memory 70 for storing data, shift register and differential logic 90, differential logic 110, tone tone And a time slot controller 100 for controlling the digital signal, a digital / analog converter 120 for converting and outputting a digital signal into an analog signal, and a serial link unit 130 connected to a subscriber telephone.

The operation of the test environment control apparatus of the vocoder card according to the embodiment of the present invention by the above configuration is as follows.

When the operation is started by the power supplied by the tester after the vocoder card 30 is connected, the processor 50 may set the tone signal for each time slot as a default, or time slot the specific tone signal according to the tester's request. Will be assigned to Therefore, the user can allocate and transmit arbitrary tone signals.

At the same time, the clock divider 20 converts clocks (8 KHz, 2.048 MHz, 50 Hz) necessary for the test into differential signals and applies them to the vocoder card 30.

On the other hand, the tone signal assigned to the timeslot is read by the processor 50 in a specific storage area of the memory 70, and the sub-order of the vocoder card 30 through the buffer 80 and the shift register 90. It is input to the highway receiving end Rx.

The vocoder card 30 processes the tone signal for each time slot input through the shift register 90 to convert the PCM signal into packet data, converts the converted packet data into a PCM signal, and then switches the digital switch of the vocoder card 30. Through the differential logic 110 through the output to the timeslot control unit 100 and the process 50.

The timeslot control unit 100 controls the tone signal fed back from the vocoder card 30 through various differential logics 110 and sends the data to the listening timeslot connected to the telephone, thereby providing a digital / analog converter 120. Tones can be heard through the tipping terminal after digital / analog conversion.

The tone signal sound input from the timeslot controller 100 to the processor 50 through the buffer 60 is used when the tester receives and compares the test pattern.

As described above, in the embodiment of the present invention, it can be mounted and used in the empty slot of the test self, the addition of the test self is free and the space constraint is less, and the tester can arbitrarily transmit the tone signal. It is possible to provide a test environment control apparatus for a vocoder card having an effect of ensuring the reliability of the system. This effect of the present invention can be modified and used by those skilled in the art without departing from the gist of the present invention in the circuit board testing apparatus field.

Claims (2)

A memory for storing tone signals, a tone signal assigned by a user for each timeslot, and a processor for reading and outputting the same, comparing the same, and shifting the tone signals stored in the memory and outputting them to the vocoder card. A shift register and differential logic, a time slot control section for controlling tone tones fed back from the vocoder card, a digital / analog converter for converting and outputting tone signals input from the time slot control section as an analog signal, and an external telephone. Test environment control apparatus of the vocoder card comprising a serial link connected to the. The method according to claim 1, The tone signal is a test environment control apparatus for a vocoder card, characterized in that the user can arbitrarily change and transmit.