RU1823149C - Device for electronic selection of television program - Google Patents

Abstract

Usage: television technique for remotely switching television programs. The inventive electronic television program selection device comprises a control unit 1, consisting of a pulse generator 2, a pulse counter 3, an element 4, decoders 5 and 6, a key block 7, single vibrators 8, 9 and a delay unit 10, delay units 11.15, counter 12 pulses, key 13, one-shot 14, decoder 16, block 17 preset, block 18 keys. 1 ill.

Description

-w

Yo

The invention relates to a television technique and can be used to remotely switch television programs.

The purpose of the invention is to reduce the time it takes to select television programs.

The drawing shows an electrical structural diagram of a device for electronic selection of television programs.

The electronic television program selection device comprises a control unit 1, consisting of a 2 pulse generator, a 3 pulse counter, an AND 4 element, a first 5 and a second 6 decoders, a key block 7, a first 8 and a second 9 single vibrators and a delay unit 10, a second delay unit 11, pulse counter 12, key 13, single vibrator 14, first delay unit 15, decoder 16, preset 17, key block 18.

Device electronic selection of television programs works as follows.

The pulses of the generator 2 pass to the information input of the counter 3 pulses and to one of the inputs of the element And 4. The value of the binary code at the output of the counter 3 pulses determines the appearance of a logical unit at one of the outputs of the first decoder 5 and the output of the second decoder 6. Output number the first decoder 5, on which the logical unit appears, corresponds to the numerical value of the binary code at the output of the pulse counter 3. At the output of the second decoder G, a logical unit appears only with one binary code value at the outputs of the counter 3 pulses, for example, with a code whose numeric value corresponds to the number of the rear output of the first decoder 5. When one of the keys of the key block 7 is closed, the logical unit from the output of the first the descrambler 5 starts the first one-shot 8, which, with a logic unit at the other input of the AND element, L opens it to pass pulses from the generator 2 to the output of the control unit 1.

When a logical unit appears at the output of the second decoder b, the And 4 element closes. The delay unit 10 allows the pulse setting the code in the pulse counter 3, due to which the logic unit appears at the output of the second decoder b, to pass through the element 4. Thus, a packet of a certain number of pulses will correspond to each closed key of the block 7 of the keys.

The beginning of the first pulse from the pulse train passes through the public key 13 to the input of the zero pulse counter 12 and to the input of the one-shot 14. Thanks to the delay unit 11, the first pulse from the pulse train arrives at the information input of the pulse counter 12 after the last zero,

The value of the set binary code at the output of the counter 12 pulses corresponds to the number of incoming pulses and, therefore, one closed of the keys of the block 7 keys. The signal from the output of the decoder 16 is supplied through the preset block 7 to the input of the key block 18. After the counter 12 receives pulses of the burst of pulses, the one-shot 13 opens the key 13. The device is ready to process the next burst of pulses.

Claims (1)

SUMMARY OF THE INVENTION An electronic television program selection apparatus comprising a control unit, a pulse counter, and in series connected decryptor, preset block and key block, characterized in that, in order to reduce the time for selecting television programs, series-connected a key, the output of which is connected to the installation of the pulse counter in O, a single vibrator and a first delay unit, the output of which is connected to the control input of the key, and a second delay unit, the input of which is connected to the signal input of the key and the output of the control unit, and the output - with the information input of the pulse counter, the output of which is connected to the input of the decoder, and the control unit is made in in the form of series-connected pulse generator, counter, one-shot and element And, the output of which is the output of the control unit, as well as series-connected second decoder, the input of which is connected to the output of the counter, one-shot and delay unit, the output of which is connected to the second input of the element And, the third input of which is connected to the output of the pulse generator.