CZ298142B6 - Television receiver for displaying two independent channels on one monitor - Google Patents

Abstract

In the present invention, there is disclosed a television receiver for displaying two independent channels on one monitor comprising: (a) a first channel selector (1) for selecting a first channel being connected with a first signal processing circuit (2) the output of which is connected with a first input of a interleaved frame circuit (3) for modulation of a first frame by the first signal; (b) a second channel selector (4) for selecting a second channel being connected with a second signal processing circuit (5) and signal synchronization circuit (6), the inputs of which are connected with first outputs of the first and second signal processing circuits (2, 5), whereby the output of the second signal processing circuit (5) is connected with a first input of a phase error correction circuit (7) having its control input connected with the first output of the signal synchronization circuit (6) the output of which is connected with the second input of the interleaved frame circuit (3) for the modulation of a second frame by the second signal. Said interleaved frame circuit (3) has its output connected to a first input of a monitor (8) the second input of which is connected with the second output of the signal synchronization circuit having its third output connected with a third input of the interleaved frame circuit (3) and having its fourth output connected with a control input of a first fading down spectacles (9), and via an inverter (10) with a control input of a second fading down spectacles (11).

Description

TV for displaying two independent programs on one monitor

Technical field

The invention relates to a television receiver for displaying two independent programs on a single monitor.

BACKGROUND OF THE INVENTION

In many fields it is necessary to monitor different data or different video outputs simultaneously or in short succession. In practice, this need is addressed either by doubling monitors or by switching signals on one monitor.

The disadvantage of two monitors is the space requirement of the device, while the disadvantage of switching is the impossibility of continuous monitoring of given signals.

Also in the home, when watching TV programs, there is often a disagreement as to which TV channel a family will watch whether a football on one channel or a fashion show on another. When switching from one channel to another, no family member enjoys the expected enjoyment. The second TV does not solve the situation especially in a smaller or improperly arranged apartment.

SUMMARY OF THE INVENTION

These drawbacks of the prior art are largely eliminated by a television receiver for displaying two independent programs on a single monitor, according to the invention, the nature of the invention being described in the following. The television includes a first channel selector 30 for selecting the first program associated with the first signal processing circuit, the output of which is coupled to the first input of the field leading circuit for modulating the first field with the first signal. a second signal, a signal synchronization circuit whose inputs are coupled to the first outputs of the first and second signal processing circuits. The second signal processing circuit is connected to the first input of the phase error correction circuit, the control input of which is connected to the first output of the signal synchronization circuit, and the output of which is connected to the second input of the field interleaving circuit to modulate the second field by the second signal. The field deinterlace circuit is connected to the first input of the monitor, the second input of which is connected to the second output of the signal synchronization circuit. The signal synchronization circuit 40 is then further coupled by its third output to the third input of the field interleaving circuit and its fourth output to the dilution input of the first blank glasses and via the inverter to the control input of the second blank glasses.

In a preferred embodiment of the invention, the first dimming glasses are provided with headphones for receiving the first program associated with the first channel selector, while the second dimming glasses are scalded with headphones for receiving the sound of the second program associated with the second channel selector.

Overview of the figure in the drawing

The invention will now be described in more detail with reference to the accompanying drawing, in which a television receiver is shown for displaying two independent programs on a single monitor according to the invention.

-1 293142 B6

DETAILED DESCRIPTION OF THE INVENTION

The figure shows schematically the connection of a television receiver for displaying two independent programs on one monitor. This connection comprises a first channel selector 1 for selecting a first program whose output is connected to the first signal processing circuit 2. The output of the first signal processing circuit 2 is coupled to the first input of the field interleaving circuit 3 to manipulate the first fields with the first signal. Furthermore, this circuit comprises a second channel selector 4 for selecting a second program, the output of which is connected to the second signal processing circuit 5. The first output of the first signal processing circuit 2 is coupled to the first input of the signal synchronization circuit 6. The first output of the second signal processing circuit 5 is coupled to the second input of the signal synchronization circuit 6. The second signal processing circuit 5 is outputted to the first input of the phase error correction circuit 7, the control input of which is connected to the first output of the signal synchronization circuit 6. The output of the phase error correction circuit 7 is coupled to the second input of the field interleaving circuit 3 to modulate the second field by the second signal. The field interleaving circuit 3 is connected to the first input of the monitor 8, the second input of which is connected to the second output of the signal synchronization circuit 6. The signal synchronization circuit 6 is connected by its third output to the third input of the field interleaving circuit 3 and its fourth output both directly to the control input of the first dimming glasses 9 and to the control input of the second dimming glasses 11 through the inverter 10. receiving the sound of the first program which is connected to the first channel selector while the second dimming glasses 11 are provided with headphones 14 for receiving the sound of the second program which are connected to the second channel selector 4.

In the operation of engaging the television to display two independent programs on one monitor, the signal from the antenna 12 arrives at both the first and second channel selector 1, 4. In the first channel selector 1, the first program is selected by the user, while in the second channel selector 4 program. The signal of the first program is processed by the first signal processing circuit 2 in a known manner, while the signal of the second program is again processed by the second signal processing circuit 5 in a known manner. The signal synchronization circuit 6 together with the phase error correction circuit 7 then adjusts the signal phase of the second program from the output of the second signal processing circuit 5 so that the signals of the first and second programs arrive at the inputs of the field interleaving circuit 3 in the opposite phase. The resulting image on the monitor 8 is then a mixture of signals from both programs. This mix is designed so that alternating people and even fields represent alternating first and second programs on the monitor. Further, the first dimming goggles 9 are directly connected to the signal synchronization circuit 6, and the second dimming goggles 11 are connected via the inverter 10. The first dimming goggles 9 dim according to the control signal from the signal synchronization circuit 6 for each even field. in accordance with the control signal from the signal synchronization circuit 6 by the inverter inverter 10 for each odd field. Thus, in a 100 Hz TV set adapted according to the invention, only the odd fields representing the first program are seen through the first dimming glasses 9, while the second dimming glasses 11 only show the even fields representing the second program. The separated audio signals of the first and second programs then go to the earphones 13, 14 associated with the first and second glasses 9 and U. Thus, it is possible for two people to see each other program on the same monitor 8 via the respective dimming glasses 9 and 11.

To modify a receiver that has worked with multiple interleaving (eg quadruple), this principle can also be used to watch multiple (in the above case four) different programs on a single monitor.

-2GB 298142 B6

Industrial applicability

The invention can be used, for example, in control rooms in which several different channels need to be watched continuously on the screen, but also in home televisions where each member of the family wants to watch a different of the currently running programs.

Claims (2)

PATENT CLAIMS A television receiver for displaying two independent programs on one monitor, characterized in that it comprises a first channel selector (1) for selecting the first program connected to a first signal processing circuit (2), the output of which is connected to the first input of the circuit (3) the second channel selector (4) for selecting the second program associated with the second signal processing circuit (5), the signal synchronization circuit (6), the inputs of which are coupled to the first outputs of the circuits (2, 5) processing the first and second signals, wherein the second signal processing circuit (5) is connected to the first input of the phase error correction circuit (7), the control input of which is connected to the first output of the signal synchronization circuit (6) and whose output is connected to the second input of the field leading field (3) for modulating the second field by a second signal, the field leading field (3) The output is connected to the first input of the monitor (8), the second input of which is connected to the second output of the signal synchronization circuit (6), the third output of which is connected to the third input of the field interleaving circuit (3). input of the first dimming glasses (9) and via an inverter (10) with the control input of the second dimming glasses (11). The television set according to claim 1, characterized in that the first dimming glasses (9) are provided with headphones (13) for receiving the sound of the first program connected to the first channel selector (1), while the second dimming glasses (11) are provided with headphones (14) for receiving the sound of the second program associated with the second channel selector (4).