SU720715A1 - Device for encoding sound signals - Google Patents

Description

one

The invention relates to radio engineering and can be used in systems for discrete processing and transmission of high-quality audio signals.

A device for encoding audio signals is known, comprising a first amplifier, the output of which is connected to the first inputs of a switching unit and a second amplifier, the output of which is connected to a second input of a switching unit, the output of which is connected to an analog-digital converter input, the output of which is connected to the first input the code generator and the input of the first register, the output of which is connected to the input of the decision block, the synchronization input of which is connected to the first output of the synchronizer, the second, third and fourth outputs to orogo associated respectively with the clock inputs of the first register, the switching unit and an analog-digital converter and the second output of the first amplifier connected to the second input of the code 1.

However, the accuracy of encoding an extractor is low.

 The purpose of the invention is to improve coding accuracy.

For this, an audio coding device comprising a first amplifier, the output of which is connected to the first inputs of the switching unit and a second amplifier, the output of which is connected to the second

the input of the switching unit, the output of which is connected to the input of the analog-digital converter, the output of which is connected to the first input of the code generator and the input of the first register, the output of which is connected to the input of the decisive unit, the synchronizing input of which is connected to the first output of the synchronizer, the second, third and fourth outputs which are connected respectively to the clock inputs of the first register, switching unit and analog-to-digital converter, and the second output of the first amplifier is connected to the second input of the forms code changer, a shift pulse shaping unit, a second register key, a shift inhibit block, a block, a ban l.; Fad wide bits, and a position code conversion block, the output of which is connected to the third input of the code generator, and the input connected to the second input of the second amplifier, the first entrances, the prohibition block shift and the block ban young

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Date: 10/07/2001

Number of pages: 4

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about p kheinrtf

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INVENTIONS

TO AUTHOR'S CERTIFICATE

(61) Additional to auth. See (22) 3a. 12.04.76 (21) 2347222 / 18-21 with the accession of application no. (23) Priority Published 03/05/08О. Bulletin No. 9 Date of publication of the description 03/07/80

(72) Author

V. M. Pustylnikov invention

(71) Claimant

(54) FUNCTIONAL CODE TRANSFORMER TO TIME-FREQUENCY SIGNAL The invention relates to computing technology and can be used to construct specialized digital-to-analog computing devices implementing non-linear conversions. A known function transformer of a code into a frequency is a register containing the code to be converted, a generator of reference frequency pulses, a counter, a decoder, triggers, keys, and logic circuits OR 1. A disadvantage of the known device is to increase the complexity of the circuit while increasing the accuracy of the conversion and reducing its hope. Also known is a functional code converter to a time-frequency signal, which contains the input code register, a bridge circuit built on elements controlled by the input code and the output pulse signal parameter (output pulse duration), the power source of the bridge circuit n connected in series.

BUT

720716

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(51) m. CL:

H 03 to 13 / OZ

(53) UDC 681. .325 (088.8) voltage unbalance amplifier of the bridge circuit and controlled generator of output rectangular pulses 2. The disadvantage of this device is the complexity of its circuit when implementing various conversion functions due to the introduction of a large number of additional devices required for the automatic determination and implementation of each approximation site. The purpose of the invention is to simplify the converter circuit with the implementation of various conversion functions, improve the technology of the device and improve the accuracy of the conversion. This goal is achieved by converting a functional code converter to a time-frequency signal containing an input code register, a digital-to-analog functional converter, a functional time-frequency demodulator, a power source, an unbalance voltage amplifier, and a controlled square rectangular generator. impulses, and the output of the power source is connected to the first input of the clockwise GOD and to the analog input of the functional digital cable digital converter, relay d. Inputs of which are connected to the outputs of the register of the input code, and the output of the unbalance voltage amplifier is connected to the input of the controlled generator of p-pulses, the output of the latter by keys to the second input of the frequency-frequency demodulator, the second functional digital-analogue a transducer, a second functional time-frequency demodulator, and two decoupling amplifiers, with the input of the first output amplifier connected to the output, the first frequency-time demodulator, and the output to the analog input in of the second, functional digital-analog converter, the bit inputs of which are connected to the outputs of the register of the input code, and the output to the first input of the unbalance voltage amplifier, the input of the second decoupling amplifier is connected to the output of the first functional digital-analog converter, and the output to the first input of the second time-frequency demodulator, the second input of which is connected to the output of the controlled square pulse generator and the output terminal, and the output to the second input of the voltage amplifier has broken nsa. The drawing shows the block diagram of the proposed Converter. The converter contains the input code register 1, the output circuit formed by the functional digital-analog converter 2 and the functional time-frequency demodulator 3, the power source 4 of the bridge circuit, the decoupling amplifiers 5 and 6, the second functional digital-analog converter 7, the second functional-phono a time-frequency demodulator 8, an amplifier 9 for the voltage unbalance of the bridge circuit, and a controlled oscillator 10 output rectangular pulses. The vertices of the bridge circuit referring to the measuring diagonal, i.e. the outputs of converter 2 and demodulator 3 through amplifiers 6 and 5 are respectively connected to the inputs of demodulator 8 and converter 7, the outputs of which are connected to the inputs of amplifier 9, the bit inputs of converters 2 and 7 are connected to the outputs of register 1. 16- 1 Frequency-time demodulators 3 and 8 are controlled by a duration of 1: 1 or a frequency of the output pulses of a device, generated by a direct oscillator 10, which can be performed either as a generator of impulses of controlled duration, or as a controlled frequency generator pulses, and when used as demodulators 3 and 8 nonlinear pulsed voltage dividers, the generalized control variable for them is the relative pulse duration in Y, proportional to both the variable duration C of pulses following a constant period, T, and variable frequency f of impulses of a constant duration t:, since in the latter the Converter operates as follows. When the input code N is changed, the output voltages of the converters 2 and 7 change and a bridge imbalance voltage arises, which is amplified by amplifier 9 and fed to generator Y input. Under the influence of the amplified voltage unbalance, the generator 1O changes the duration or frequency of its B1) IN 1X pulses so as to restore the balance of the bridge, i.e. equality of output voltages U-, n Ug of converter 7 and demodulator 8, respectively. Since iFD0) G (S); and IRS) F (.e), 1261fde Fj (N) and F. F (0). Ф (О) - functional characteristics of frequency-time demodulators 3 and 8j - supply voltage of the bridge circuit, about equality U Ug, automatically supported by the Nrebrazovatel follower system, corresponds to the conversion characteristic given

Claims (1)

Claim A functional converter is a code into a time-frequency signal containing an input code register, a functional digital-to-analog converter, a functional time-frequency demodulator, a power source, an unbalance voltage amplifier, and a controlled square-wave generator, the output of the power source being connected to. the first input of the time-frequency demodulator and the analog input of the functional digital-to-analog converter, the bit inputs of which are connected to the outputs of the register input code And the voltage amplifier output connected to the input unbalance upravlyav- 720716 6 owls, the output of the latter is connected to the second input of the time-frequency demodulator, characterized in that, in order to simplify the converter during implementation, the various conversion functions, a second functional digital-to-analog converter, a second functional time-frequency demodulator and two decoupling are introduced into it an amplifier, the input of the first decoupling amplifier being connected to the output of the first frequency-time demodulator, and the output to the analog input of the second functional digital-to-analog conversion ovatelya, bit inputs of which are connected to the outputs of the input code register and the output - to the first amplifier input voltage imbalance, Armando Vajushi razvyazy20 second amplifier input to the output of the first functional digital-analog converter, and _r out - the first vho-. to the second time-frequency demodulator, the second input of which is connected to the output of the controlled rectangular pulse generator and the output terminal, and the output to the second input of the unbalance voltage amplifier.