SU803125A1 - Device for marking and selecting picture areas at video recording - Google Patents

Description

one

The invention relates to radio engineering and can be used in automated complexes of control and recording equipment, analysis equipment and computer information processing.

A device for marking and sampling the frame number is known for video recording, containing a destination signal generator sequentially connected, a destination signal substitution unit, the second input of which is supplied with a full television signal whose output is connected to the signal input of a video recorder, which are connected in series to the destination signal selector whose input is connected to the output video recorder, code converter, equality block and reliability analyzer, while one of the clock outputs of the video recorder under It is connected to the input signal generator of the addressee and the control input of the selector signal of the addressee 1.

However, in the known device, the current code of the frame number is generated only in the playback mode, which does not allow for automatic search of video information.

The purpose of the invention is to provide an automatic search for video information.

To do this, the device for marking and sampling the frame number for video recording, containing the destination signal generator in series, the mixing unit of the destination signal, to the second input of which a full television signal is fed, the output of which is connected to the signal input of the video tape recorder,

the input of which is connected to the output of the video recorder, the code converter, the equality block and the reliability analyzer, while one of the clock signals of the video recorder is connected to the input of the destination signal generator and the control input of the destination signal selector, a series-added correction code block, an adder and a comparison block are entered, and also serially connected code setting block, operative storing

the unit, the second input of which is connected to the output of the recipient signal generator, and the display unit, a reversible counter connected in series, and an element, the second input of which is connected to the first output of the confidence analyzer, and the output of the element AND is connected to the second input of the comparison unit, the control unit, the first and the second inputs of which are connected to the corresponding clock outputs of the video recorder, the third, fourth and fifth inputs of the control unit are connected respectively to the first, second and third outputs of the block tim, first, second, third and fourth outputs of the control unit are connected to respective inputs videomag mode control operation. nitophon, and the fifth output of the control unit is connected to the second input of the accuracy analyzer, the sixth and seventh outputs are connected respectively to the first and second control inputs of the reversible counter, the eighth output is connected to the control input of the adder, and the ninth output is connected to the third input of the operational storage unit, at the same time, the first and second installation inputs are revs ..) sivyugo sch. The sensor is connected to the corresponding outputs of the accuracy analyzer, the information input of the reversible counter is connected to the output of the code converter, and the output of the reversible counter is connected to the second input of the equality block, to the second input of the display unit and the fourth input of the operational storage unit, the output of which is connected to the third input of the display unit and with the second input of the adder.

The drawing shows a structural electrical circuit of the proposed arrangement.

The device contains a block of 1 measurement of the signal of the addressee, shaper 2 of the signal of the addressee, video recorder 3, selector 4 of the signal of the addressee, converter 5 of the code, block 6 of control, analyzer 7 of validity, block 8 of equality, reversible counter 9, element 10, block Comparison II, correction code entry block 12, adder

13, operational security unit (OZB)

14, the display unit 15 and the code setting unit 16.

The device works as follows.

At the first stage, the video information is marked and recorded on a magnetic tape. On the second - the video playback and search for the desired frame number.

At the first stage, the shaper 2 uses frame sync pulses from one of the outputs of the synchronization channel of the video tape recorder 3 to generate a target signal corresponding to the frame number of the video information that enters block 1, where the combined video signal is generated and fed to the input of the video tape recorder 3, where video recording together with a signal of the addressee on a magnetic tape.

At the second stage, from block 6, a command is issued permitting the recording of information in the CG14. With the help of block 16, the CCD 14 records information corresponding to the selected frame number code. WITH

output OZB 14 code in parallel form is fed to the input of the adder 13 and the input of the block 15 for the subsequent visual control of the sampling process. Then the device enters the exact lock mode. From block b to the corresponding input of the B. video recorder 3, the command "play." The combined video signal from the output of the video tape recorder 3 is fed to the input of the selector 4, where using the clock pulses from the video tape recorder 3, the signal of the addressee is extracted from the combined video signal. The received signal of the addressee is fed to the input of the converter 5, in which the transformation of the following binary code changes after: aowat.Dd binary code: iiap; i Jie /; biib; i Di0 1 day - colorful number of the frame. Converted code; 1.), 1: Operator (BaumeiI1I1 1Y input of the reverse of the 11th counter 9 and block 8. At the initial time of the VCR 3 in the playback mode, the analyzer 7 does not receive a signal equal to With this, from the output of the analyzer 7, the set inputs of the counter 9 receive impulses "Setups O and Set 1, separated by time. Thus, the counter 9 of the reference binary-decimal code of the frame number received from the Transducer 5 is overwritten the input of counter 9 is supplied The command "direct counting" from block b and a counting pulse is sent to the counting input, by means of which the unit of the least significant bit is added to the frame number code set in counter 9. Consequently, by the time the next frame of video information is processed from the output of the upward counter 9 to one of the inputs of block 8 goes in parallel "1n code of the frame number corresponding to the next transformed code of the frame number, which comes from output r; the converter 5 to the second input of block 8, where they are compared by dulu 2. If the signal "equal to" does not appear from block 8 to analyzer 7, then the cycle of rewriting information from the converter -) to counter 9 is repeated. If the analyzer 7 from block 8 receives the "equal" signal, the rewriting cycle is not repeated, but in counter 9, the pulse rate is calculated. incoming from block 6, is produced.; The unit of the least significant bit to the next unused code of the frame number. When received, three guided steps (equal signals from the output of block 8, analyzer 7 eliminates the cycle of code overwriting into counter 9, and from the output of analyzer 7, resolving potential is applied to one of the inputs of element 10, because further analysis of the reliability The frame number code read from the tape is impractical because the probability that information will fall out in three consecutive frames, strictly corresponding to the algorithm for changing the destination signal from frame to frame, is negligible. The exact lock mode is from the output of counter 9, a reliable code of the frame number is obtained, strictly corresponding to the frame number of video information on a magnetic tape. The received code goes to one of the inputs of block 15 of the current code of the frame number in OZB 14 and to the second input of the element 10. The device goes into the coarse information search mode on the tape.The parallel code of the frame number obtained in counter 9 by counting frame sync pulses, through element 10 enters the input of block 11, to the other input of which a signal is output from the adder 13, corresponding to the code of the frame number specified in OZB 14. From the output of block 11 to the input of block 6 one of three signals can arrive - “equal,” more, “less. In the case of the occurrence of a signal "equal to", block 6 issues an overwrite command to the external device, and the process of sampling the required frame of video information ends there. In case the code of the frame number specified in OZB 14 is greater than the current code of the frame number in the adder 13 in accordance with the control command from block 6, the correction code supplied from the output of block 12 is subtracted from the specified code to the second input of the adder 13. After re-comparing the obtained corrected code with the current frame number code, while saving the signal more at the output of block 11, block 6 switches the VCR 3 from playback mode to forward mode. In case the frame number code specified in OZB 14 is less than the current frame number code, unit 6 switches the VCR 3 from playback mode to rewind mode. The correction code generated in block 12 depends on the inertia of the tape movement when the video tape recorder 3 transitions from forward rewind to playback mode. When re-comparing the corrected and current codes and changing the signal “more by signal” is less at the output of block 11, block 6 does not switch the VCR 3 from playback mode to forward mode, because changing the signal at the output of block 11 to the opposite one says that the difference between the given and current frame number codes is less than the correction code. In this case, in the adder 13, the specified code of the frame number is restored by adding the correction code to the corrected code and the VCR 3 continues

work in the playback mode until the signal appears at the output of block 1I and is equal to, according to which block 6 issues an overwrite command to an external device, and the process of sampling the required frame of video information ends there.

After the VCR 3 transitions from playback mode to rewind mode in the forward or reverse direction, counter 9 continues to count, respectively.

 right or reverse.

In virtually every type of studio video recorder in rewind mode, you can get a signal at the output that strictly corresponds to the footage of the tape, and therefore, and video information on the tape. This signal is fed to the input of block 6, where it is recalculated to the frame frequency and the signal thus obtained is fed to the counting input of counter 9.

At the output of counter 9, we obtain in parallel the code of the frame number corresponding to the video information on the tape at each time, which through element 10 goes to one of the inputs of block 11. To the other input of block 11, a signal is output from the adder 13. When received from The output of signal block 11 is equal to block 6 switches the VCR 3 from the rewind mode to the reproduction mode. Moreover, if the switching occurred from the rewind mode in the forward direction, to

 adder 13 restores the specified code by adding the correction code to the corrected code. Next, the device repeats the exact binding mode described above, and when the resolving potential (“anchor”) is received from the analyzer 7 (parallel), the parallel code of the frame number strictly corresponding to the video information on the tape goes through one of the inputs 10 from the output of the counter 9 to one of the block inputs 11. To another input of block 11 comes from

the output of the adder 13 specified code frame number. When receiving a signal “equal to the output of block 11, block 6 issues the command“ overwrite to external device ”. The process of sampling the required frame of video information

is running out.

The device also provides the ability to write to the AZB 14 the code of the frame number required for subsequent sampling in the recording mode and in the playback mode, for which the information on the current code of the frame number is sent to the corresponding inputs of the AZB 14 from the output of the former 2 and from the output of the counter 9.

Claims (1)

The proposed device allows for the automatic selection of a Tpe6yf frame of video information; to have information about the current frame number in any mode of operation of a VCR; automate the process of inputting the required frames of video information into a computer for machine processing; apply any video recording apparatus (studio or small-sized) when creating automated complexes of recording, control, express-processing and machine analysis equipment; functionally simplify and facilitate the work of the staff. The invention of the device marking and sampling the number of frames for video recording, containing a destination signal conditioner connected in series, a kneading unit of a destination signal, the second input of which is supplied with a full television signal whose output is connected to the signal input of a video recorder, which are connected in series to the destination signal selector whose input is connected to video recorder output, code converter, equality block and confidence analyzer, with one of the clock outputs of the video arc The nitophon is connected to the input of the destination signal generator and the control input of the destination signal selector, characterized in that, in order to provide automatic video search, serially connected correction code inserter, adder and comparison unit, as well as serially connected code setting block, operational memory, are entered, the second block, the second input of which is connected to the output of the recipient signal generator, and the display unit, a series-connected reversible counter and the AND element, the second input of which It is connected to the first output of the accuracy analyzer, and the output of the element I is connected to the second input of the comparison unit, the control unit, the first and second inputs of which are connected to the corresponding clock outputs of the video recorder, the third, fourth and fifth inputs of the control unit are connected respectively to the first, second and the third outputs of the comparison unit, the first, second, third and fourth outputs of the control unit are connected to the corresponding control inputs of the operation modes of the VCR, and the fifth output of the control unit and connected to the second input of the accuracy analyzer, the sixth and seventh outputs are connected respectively to the first and second control inputs of the reversible counter, the eighth output is connected to the control input of the adder, and the ninth output is connected to the third input of the operational storage unit, the first and second installation inputs the reversible counter is connected to the corresponding outputs of the analyzer authenticity, the information input of the solid counter is connected to the output of the code converter, and the output of the reversible counter connected to the second input of the equality block, to the second input of the display unit and the fourth input of the operational storage unit, the output of which is connected to the third input of the display unit and to the second input of the adder. Sources of information taken into account in the examination 1. USSR author's certificate in application no. 2529835 / 18-09, cl. H 04 N 5/78, 1977 (prototype).