JPS6247394B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a television signal receiving device consisting of a television receiver and a VTR, and the present invention relates to a television signal receiving device that includes a television receiver and a VTR, and the present invention relates to a television signal receiving device that includes a television receiver and a VTR. The purpose is to display information etc. on a television receiver.

FIG. 1 is a diagram showing the basic configuration of a television signal receiving apparatus according to the present invention. In the figure, 1 is an antenna, and 2 is a mixer for mixing the output of the antenna 1 and the output of the DTR 4.

FIG. 2 is a block diagram showing an embodiment of the present invention on the VTR side. A television signal received by an antenna 5 is demodulated by a television signal demodulation circuit 6. As shown in FIG. Signal a is a demodulated video signal. This signal a is input to the recording circuit 7, as well as to the additional signal generation circuit 8 and video mixer 9. Signal b is the output of the additional signal generating circuit 8. This signal b is input to the video mixer 9, and the mixed output with the signal a is output from the video mixer 9 as a signal c. Reference numeral 11 denotes a switch which inputs the signal c during recording and the output d of the reproduction circuit 10 into the RF converter 12 during reproduction.

In addition, 100 is a recording/playback switch, 1
01 is a motor, 102 is a head, and 103 is a tape.

FIG. 3 shows a specific example of the additional signal generating circuit 8, in which 13 is a circuit that separates the vertical synchronizing signal V _a and the horizontal synchronizing signal H _a from the demodulated video signal a, and 14
is a counter that counts the amount H _a and is reset at the value V _a . f is a signal that becomes high potential at a specific count value of the counter 14, and e is a signal that becomes high potential during recording operation of the VTR 4. 15 is an AND circuit, 1
A gated oscillator 6 oscillates only when the AND output of f, e, and H _a is at a high potential, and the output of this gated oscillator 16 is a signal b. Furthermore signal b
is added to the video mixer 9 to obtain a signal c mixed with the signal a. FIG. 4 shows the signal c of the video mixer output, and shows that the signal b is superimposed within the vertical blanking.

FIG. 5 shows an embodiment of the present invention on the television receiver side, and FIG. 5A is a block diagram, and FIG. 5B is a waveform diagram of the main part. In the figure A, 17 is an antenna, 18 is a so-called television signal demodulation circuit including a tuner, VIF, detection, and video demodulation, and 19 generates a vertical synchronization signal V _p of the demodulated video signal P and a horizontal synchronization signal H _p . A circuit 20 is a detector that detects the signal b superimposed on the video signal P and outputs a pulse signal f;
21 is a frequency divider that divides the signal into 1/n in order to reduce the capacity of the counter 22; 22 is a counter that counts the output of the frequency divider 21 in order to integrate the recording time of the VTR; 23 is a is set by the signal f, and V
A flip-flop 24 which is reset by _p and outputs a signal m is a counter for counting the above-mentioned H _p and is reset by V _p . Reference numerals 25 and 26 indicate an output circuit that outputs signals g and h according to a specific count value of the counter 24, 27 a gated oscillator that stops oscillation for a period of H _p , and 28 a counter that counts the output of the gated oscillator 27. It is reset by H _p .
29 is an output circuit that outputs an output signal j of a specific count value of the counter 28; 30 is an output signal j of the counter 28;
A count comparator 31 compares the count values of 2 and 28 and outputs a matched signal, a flip-flop 31 is set by the H _p and reset by the output of the count comparator 30, and outputs a signal i; 32 is a flip-flop that outputs a signal g and AND circuit for obtaining AND output I of H _p , 3
3 is an AND circuit that obtains an AND output k of signal g, H _p and signal i, 34 is an AND circuit that obtains an AND output n of signals h, j, and n, and 35 is an AND circuit that outputs signal g from video signal P to signal I and signal n. A gate circuit for obtaining a video signal P′ excluding the corresponding video signal portion, 3
A video mixer 6 mixes signals k and n with the video signal P' to obtain a video signal P''.

In the above configuration, if the input of the OR circuit 25 is the count value output 240 to 244, and the input of the OR circuit 26 is 250 to 254, the respective outputs g, h
When made to correspond to the screen, it becomes the parts A and B shown in Fig. 6. Next, the oscillation frequency of the gated oscillator 27 is set to 225 _HP with respect to the frequency _HP of H _p , and the input to the output circuit 29 is set to 30 to 4 by the count value of the counter 28.
When it is set to 0, the output j becomes the part C in FIG. Next, when the count value of the counter 22 (this count value corresponds to the recording time of the VTR and is the number of recorded fields x 1/n) is 110, the flip-flop 31
When the output i is made to correspond to the screen, it becomes part d in FIG. As a result, the outputs k of the AND circuits 33 and 34,
n is the diagonally shaded part E in FIG. 6, which indicates the recording time. Furthermore, it indicates that the area in the same figure is being recorded.

FIG. 7 shows the video mixer 36 in the above state.
This shows the screen on which the video output P'' obtained from the above is displayed.H is the display during recording which is equivalent to the above F, and the white part of G or the recording time which is equivalent to the above E is displayed. 7 can be stopped by switching off the input signals I, k, and n of the gate circuit 35 and video mixer 36, respectively. It goes without saying that the frequency division ratio is determined by the oscillation frequency of the gated oscillator 27 and the maximum time of the recording time display.

Note that color display is also possible by adding a color signal to the signals k and n indicating the display time during recording and the display time of recording time.

In addition, as shown in Fig. 8, two different channels (main screen) and (sub screen) are received, and every other horizontal scan of the sub channel is stored in the memory circuit corresponding to the scanning line for one horizontal scan. 1 of the pixels of
When the horizontal scanning of the main channel sweeps the part on the screen,
The information of the VTR 4 is used in a television receiver that displays the image signal of the sub channel as an image compressed to 1/4 of the area ratio by reading the contents of the memory circuit at twice the writing speed. It is also possible to display the image on the sub-screen of the television receiver. Here, the configuration can be simplified by using the gated oscillator 27 in the previous embodiment as the oscillator for oscillating the clock for writing to the memory circuit.

In the above embodiment, an information signal related to the VTR is added to the vertical blanking of the video signal output from the VTR, and the information signal is detected by the television receiver.
By converting the detected information signal into a video signal and mixing it with the video signal demodulated by the television receiver, the status of the VTR can be monitored by the television receiver. Furthermore, since the information signal is inserted into the vertical blanking, it is possible to turn on and off the display of the information signal, which is very convenient.

As described above, the present invention can display information indicating the status of the VTR on the screen of the television receiver, so it is possible to provide a television signal receiving device that is very convenient for the user.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the basic configuration of an embodiment of the present invention, FIGS. 2 and 3 are block diagrams showing the main parts of the VTR of this embodiment, FIG. 4 is an output waveform diagram thereof, and FIG. Figure A is a block diagram showing the main parts of the television receiver of this embodiment, Figure 5B is a waveform diagram of the main parts, and Figure 6 is a schematic diagram for explaining image display.
Figure 7 is an image diagram showing a specific display state, Figure 8
The figure is a front view showing a display screen in another embodiment. 5...Antenna, 6...Television signal demodulation circuit, 7...Recording circuit, 8...Additional signal generation circuit, 9...Video mixer, 10...Reproduction circuit, 1
2...RF converter, 17...Antenna, 18
... Television signal demodulation circuit, 19 ... Synchronization generation circuit, 20 ... Detector, 21 ... Frequency divider, 2
2, 24, 28...Counter, 23, 31...Flip-flop, 25, 26, 29...Owa circuit,
27...Gated oscillator, 30...Comparator, 3
2, 33, 34...AND circuit, 35...gate circuit, 36...video mixer.

Claims (1)

[Scope of Claims] 1. A television signal recording and reproducing device that receives a television signal, records and reproduces the demodulated video signal on a magnetic tape or optical disk, etc., and outputs it as a television signal, and receives the television signal. In a television receiver that displays a video signal, means for adding a specific information signal to the vertical blanking of the video output signal during recording of the television signal recording and reproducing device, and an RF
means for modulating, means for mixing the output of the modulating means with a received television signal supplied to a television receiver, means for detecting the information signal from the video signal demodulated by the television receiver, and the detected information. A means for converting the signal into a second video signal, a means for mixing the second video signal converted from the information signal with the demodulated video signal, and simultaneously converting the video signal and the second video signal. A television signal receiving device characterized in that the television signal is displayed on the television receiver. 2. A television signal recording and reproducing device that receives a television signal, records and reproduces the demodulated video signal on a magnetic tape or optical disk, etc., and outputs it as a television signal, and televisions of different first and second channels. receive signals simultaneously,
The demodulated video signal of the second channel is stored in a storage circuit, read out sequentially at a higher speed than the writing speed, and the time-axis compressed video signal of the second channel is extracted. the first channel by exchanging a portion of the video signal with the compressed video signal of the second channel;
In a television receiver that displays the compressed video signal of the second channel on a part of the video screen of the video signal of the channel, within the vertical blanking of the video output during recording of the television signal recording and reproducing device. means for adding a specific information signal to the television receiver; a television signal in which the output of the television signal recording and reproducing device is equivalent to a second channel; and a television signal in which the broadcast television signal is equivalent to the first channel; means for detecting the information signal from a video signal equivalent to a demodulated second channel, means for converting the detected information signal into an information video signal, and demodulating the information video signal converted from the information signal. and a means for mixing the mixed video signal into a video signal equivalent to the second channel, the video signal after the mixing is stored in the storage circuit, and taken out as a time axis compressed sub-screen signal, and the video signal is mixed into a video signal equivalent to the second channel. A television signal characterized in that a main screen video signal demodulated from a video signal equivalent to the information video signal is partially replaced and superimposed, and a sub-screen on which the information video signal is displayed is displayed on a part of the video screen. Receiving device.