SU822249A1 - Device for compression and expanding speech signal - Google Patents

Description

(54) TOOL FOR COMPRESSION AND EXPANDING VOICE SIGNAL

trigger 9 of compression, trigger 10 of information output, driver 11 pulses, delay line 12, information generator 13, cyclic transfer generator 14, information output generator 15, and switch 16.

The device works as follows.

The converted speech signal is fed to the A / D converter 1, which converts the signal into a sequence of digital codes with a frequency specified by the information-generating generator 13, and enters the digital code in the first bits of the information register 2 shift and 1 in the first discharge of marker register 4 shift. At each successive arrival of the pulse from the generator 13, information is shifted in registers 2 and 4 of the shift by one bit, entering into the released bit of information shift register 2 of the new code parcel from the output of the ADC 1 and entering 1 into the marker register 4 of the shift. The output of a sequence of digital codes is carried out at each subsequent arrival of a pulse from the generator 15 of an information output determining the output frequency. When a pulse arrives from generator 15 to trigger 7 of cyclic Information Transfer in information 2 and marker 4 shift registers, information is shifted to the right by impulses from information cyclic transfer generator 14. At the same time, the trigger 10 of the information shuffle is reset, preparing the DAC 3 to receive the next code message. The frequency of the generator 14 cyclic transfer of information is chosen much higher than the frequency of the generator 13 recording information and the generator 15 output information. During the shift process, the accompanying information sequence of the Marker signals reaches the Nth bit of the marker register 4 shift, resulting in the output of the N-th discharge; a high level of voltage is established, corresponding to logical 1 and remaining constant during the passage of the entire sequence of marker signals . At occurrence of 1 in the N-th discharge of the marker register 4 shift, the pulse from the generator 14 causes the code dressing from the H-th discharge of the information register 2 shift to the DAC 3. informshschii. The occurrence of information in the D / A converter 3 is terminated, and the circuits of information transfer in the first bits of information 2 and the marker 4 shift registers are opened. The process of moving

the rest of the information is carried out before the appearance of the o in -th digit of the marker register 4 shift. The change of state in the Nth digit of the marker register 4 shift using the pulse generator 11 is selected as a pulse, resetting the trigger 7 for cyclic information transfer, stopping the information shift process. Thus, one cycle of outputting information, corresponding to the next pulse of the information output generator 15, is completed. The temporal compression or expander mode is determined by the ratio of the F-jg frequencies and the position of the switch 16. Jri FjQfl FgyJ Essential compression of the time portion of the speech signal. In the case of a temporary compression, the code parcels are entered into the information shift register 2 before it is filled, and then issued to the output frequency controlled by the compression trigger 9. The appearance of the marker register 4 of the shift in the Nth discharge leads to the transfer of the trigger 9 of compression and the beginning of the output of information. The appearance of the O in the first discharge of the Möfker register 4 shift after the end of the information output cycle returns the trigger 9 of the compression to its original position. The output of information is stopped and a new one is started. Filling in the information register 2 shift. With the frequency ratio Fagj | Expanded time interval of the speech signal. In the case of temporary expansion, the code messages are entered into the information register 2 of the shift and the simultaneous output of the code messages with the frequency

  This invention improves the accuracy and reliability of the device, reduces the register spacing by inserting cyclic shift chains into the skip registers, ensures the linearity of the information input process and reproduces it on a time scale for the selected signal segments.

 inventions i

A device for compressing and expanding a speech signal, containing digital transducers connected via the shift information register, as well as a control unit having an information output trigger and a cyclic information transfer trigger, characterized in that the whole operation reliability of the device equipped with a generator of information entry, a generator of cyclic transfer of information, a generator of information output and a marker shift register, the output of which is connected to the trigger issuing information and t The rigger of the cyclic transfer of information, and the input of the generator of information, the generator of cyclic transfer of information and the generator of information output are connected to the control unit, and the circuit of cyclic transfer of information is inserted into the marker and information shift registers.

, Sources of information taken into account in the examination 1. French patent W 21500 & 7, cl. G 10 L 1/00, Publ. 1973. 2. Patent of France No. 2188230 ,. cl. G 11 In 5/86, published. 1973 (prototype).

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Claims (1)

Claims A device for compressing and expanding a speech signal, containing. digital converters connected through the shift information register, as well as a control unit having an information output trigger and a cyclic information transfer trigger, characterized in that, in order to increase the reliability of the device, it is equipped with an information recording generator, a cyclic information transfer generator, a generator information output and marker shift register, to the output of which a trigger for issuing information and a trigger for cyclic transfer of information are connected, and an input generator is connected to the input information, wherein the generator of the cyclic information transmission and information generator output connected to the control unit, and the marker information and registers of translations ha administered cyclic chain transfer information.