JPH06152886A - Video signal transmitter and receiver - Google Patents

Abstract

PURPOSE:To obtain a video signal transmitter where the whole images on small screens constituting a multi-screen are displayed by an animation without increasing an exclusive multi-screen display channel. CONSTITUTION:Respective multi-screen synthesizing circuits 12, 13 and 14 generate a multi-screen display video signal 102 adding the respective video signals from 1ch to 9ch, the multi-screen display video signal 103 from 10ch to 18ch and the multi-screen video signal 104 from 19ch to 27ch. The respective multi- screen display video signals 102, 103 and 104 are given to a time division synthesizing circuit 16 and a time division synthesizing signal 106 where the multi- screen display video signals are arrayed at every frame unit in order of 102, 103 and 104 is generated. Identifying signals for identifying are respectively added to the respective multi-screen display video signals 102, 103 and 104 constituting the time division synthesizing signal 106.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a video signal transmitting apparatus for generating a video signal for multi-screen display of video of each channel on the same screen, and transmitting the multi-screen display video signal, and a video signal transmitting apparatus. The present invention relates to a video signal receiving device that receives a multi-screen video signal transmitted from a device and displays it on a screen.

[0002]

2. Description of the Related Art In recent years, a television receiver has been provided with a plurality of functions. One of these functions is that the display screen is divided into a plurality of small screens in accordance with the progress of digital technology, and each small screen has each channel. A multi-screen display function has been developed that simultaneously displays the images.

For example, as one of the devices for executing this multi-screen display function, a channel selection device for displaying images of four channels on the screen by four tuners (Japanese Patent Laid-Open No. 61-15).
628).

As another television receiver having a multi-screen display function, images of a plurality of channels are sequentially received by a single tuner, the received images are written in an image memory, and written in the image memory. Which are displayed on the same screen at the same time by reading out the recorded images (Japanese Patent Laid-Open No. 61-258580 and Japanese Patent Laid-Open No. 61-25).
No. 8581, No. 61-258583, No. 61-2607776, and No. 2-19828.
3 gazette).

However, particularly in a multi-channel medium having a number of receivable channels of about several hundreds, such as CATV, when a plurality of tuners are used, the number of the tuners becomes large and a great deal of cost is required. On the other hand, when performing the multi-screen display with the latter single tuner, it takes time to select the channel and the displayed video looks unnatural.
Or it will be a still image without frames.

Further, as another television receiver having a multi-screen display function, broadcast programs received by one tuner are classified into a plurality of categories according to the main broadcast contents, and the categories are selected by the user. Multi-screen display of a plurality of belonging broadcast images at the same time
No. 78).

[0007] In this television receiver, when there are many channels such as CATV, a desired channel can be easily selected, but since the number of tuners is 1, it takes time to select a channel. The displayed image is an unnatural pseudo movie or a frame-still still image.

Therefore, in a multi-channel medium such as CATV, when multi-screen display by a plurality of tuners is used to select a desired channel, a large amount of cost is required, and a multi-screen by a single tuner is used to select a desired channel. When using the display, it takes time to select the channel as the number of channels increases, and the displayed image becomes an unnatural pseudo moving image or a frame-still still image.

In order to solve these problems on the receiver side, a video signal for multi-screen display edited on the broadcasting station side so as to display video for a plurality of broadcast channels on a multi-screen is sent out on a dedicated channel. Can be considered.

However, since the composition of the video for the multi-screen display performed on the receiver side is performed on the broadcast station side,
Although it is possible to display all small-screen images constituting a multi-screen as moving pictures, it is necessary to increase the number of dedicated channels when there are many channels.

[0011]

As described above, the CA
In multi-channel media such as TV, when the broadcasting station synthesizes the images for the multi-screen display that was performed on the receiver side, all the small-screen images that make up the multi-screen are displayed as moving images. However, when there are many channels, it is necessary to increase the number of dedicated channels.

In order to solve the above-mentioned problems, the present invention transmits a video signal capable of displaying all small-screen images constituting a multi-screen as a moving image without increasing the number of dedicated channels for multi-screen display. An object is to provide an apparatus and a video signal receiving apparatus used for the apparatus.

[0013]

A video signal transmitting apparatus according to the present invention comprises a multi-screen synthesizing means for generating a plurality of multi-screen display video signals by editing a video signal transmitted for each channel. Time-division synthesizing means for performing a time-division synthesis process on each of the multi-screen display video signals in a predetermined unit such as a frame unit or a field unit, and generating a plurality of multi-screen display video signals for each unit; Identification signal adding means for adding identification signals corresponding to each of the multi-screen display video signals generated by the dividing and combining means, and generating a plurality of identification signal addition video signals to which the identification signals are added, and Transmission means for transmitting the video signal of the channel and each identification-signal-added video signal to the transmission path.

The present invention is a video signal receiving device for receiving each video signal and each identification signal added video signal from the video signal sending device according to claim 1, wherein the video signal sending device sends the video signal to the transmission path. Receiving means for receiving by selecting a predetermined video signal from among the video signal for each channel and the video signal for each identification signal added transmitted via
Identification signal detection means for detecting an identification signal designated from the identification signal-added video signal, and a video signal to which the identification signal is added based on the identification signal detected by the identification signal detection means Extracted from the video signal,
Writing means for writing the extracted identification signal-added video signal in an image memory, and display for reading out the identification signal-added video signal written in the image memory and displaying the read identification signal-added video signal on the screen And means for selecting and instructing a desired video signal from a plurality of video signals included in the identification signal added video signal.

[0015]

[Operation] In the video signal transmitting apparatus of the present invention, a plurality of video signals for multi-screen display are generated by editing the video signal transmitted for each channel, and a frame is added to each of the video signals for multi-screen display. Performs time-division synthesis processing in predetermined units such as units or fields, generates a plurality of multi-screen display video signals for each unit, and outputs identification signals corresponding to each multi-screen display video signal for each unit. Add
The plurality of identification signal-added video signals to which the identification signals are added are sent to the transmission path together with the video signals of each channel.

In the video signal receiving apparatus of the present invention, the specified identification signal is detected from the identification signal added video signal, and the identification signal is added based on the identification signal detected by the identification signal detecting means. A video signal is extracted from each of the identification signal-added video signals, the extracted identification signal-added video signal is written in the image memory, the identification signal-added video signal written in the image memory is read, and this is read out. The identification signal-added video signal is displayed on the screen, and a desired video signal is selected from a plurality of video signals included in the identification signal-added video signal displayed on the screen and instructed.

Therefore, in a multi-channel medium such as CATV, it is possible to display pseudo-moving images of all the small screens constituting the multi-screen without increasing the number of dedicated channels for multi-screen display. The selection of the predetermined channel can be facilitated.

[0018]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of a video signal transmitting apparatus of the present invention.

As shown in FIG. 1, the video signal transmitting device 11 has a plurality of channels for transmitting video signals. In this embodiment, 27 channels from 1ch to 27ch are set. Each video signal from 1ch to 9ch is given to the multi-screen synthesis circuit 12, and the multi-screen synthesis circuit 12 edits each video signal from 1ch to 9ch to generate a multi-screen display video signal 102. The display configuration using the multi-screen display video signal 102 has a configuration in which video signals from 1ch to 9ch are allocated to each of 9 blocks of 3 × 3.

Each video signal from 10ch to 18ch is given to the multi-screen synthesizing circuit 13, and the multi-screen synthesizing circuit 13 edits each video signal from 10ch to 18ch to generate a multi-screen display video signal 103. It The display configuration by the video signal 103 for multi-screen display has a length of 3
Each of 10 blocks from 18ch to 9 blocks of 3 x X
The video signals up to h are allocated.

Each video signal from 19ch to 27ch is given to the multi-screen synthesizing circuit 14, and the multi-screen synthesizing circuit 14 edits each video signal from 19ch to 27ch to generate the multi-screen display video signal 104. It The display configuration using the multi-screen display video signal 104 has a vertical 3
From each 19ch to 27c in each of 9 blocks of 3 X sideways
The video signals up to h are allocated.

Each of the multi-screen display video signals 102, 103,
The output of 104 is performed based on the timing signal 105 generated by the timing signal generation circuit 15, and the multi-screen display video signals 102, 103 and 104 are given to the time division synthesis circuit 16.

The time division synthesizing circuit 16 switches the multi-screen display video signals 102, 103 and 104 on a frame-by-frame basis based on the timing signal 105 from the timing signal generating circuit 15, and the multi-screen display video signal 102, multi-screen display signal 102. A time-division composite signal 106 is generated in which the screen display video signal 103 and the multi-screen display video signal 104 are arranged in this order.

The time division composite signal 106 is given to the identification signal adding circuit 17. The identification signal adding circuit 17 is provided for each of the multi-screen display video signals 10 forming the time division composite signal 106.
Identification signals a, b, and c for identifying 2, 103, and 104 are added, and the identification signals a, b, and c are added.
The video signal 107 to which is added is generated. The video signal 107 is the video signal 102a to which the identification signal a is added,
Video signal 103b to which identification signal b is added, identification signal c
The video signals 104c to which is added are sequentially arranged. As shown in FIG. 2, the respective identification numbers a, b, and c are digital data of (1, 0), (0, 1), and (1, 1), respectively.
Is superimposed as a luminance component.

The video signal 107 is given to the transmission circuit 18. The transmission circuit 18 sends out the video signal 107 on a dedicated channel via a transmission line and also from 1ch to 27ch.
The corresponding video signal is transmitted in a normal form.

Next, a video signal receiving device for receiving each video signal from 1ch to 27ch of the video signal transmitting device 11 and the video signal 107 to which each identification signal is added will be described with reference to the drawings. FIG. 3 is a block diagram showing an embodiment of the video signal receiving apparatus of the present invention.

As shown in FIG. 3, the video signal receiving device 21 includes a tuner 22 for receiving each video signal and the video signal 107.

The tuner 22 has a CPU (central processing unit)
A control signal indicating a user's instruction is given from 23, and the tuner 22 selects a predetermined channel from each channel from 1ch to 27ch and a dedicated channel based on the control signal from the CPU 23.

The video signal of the channel selected by the tuner 22 is supplied to the video processing circuit 24, and the video processing circuit 2
Reference numeral 4 performs processing such as IF signal amplification and video detection on the video signal. The video signal from the video processing circuit 24 corresponding to each channel from 1ch to 27ch is given to the switching circuit 25.

When the video signal from the video processing circuit 24 is the video signal of the dedicated channel, this video signal is given to the identification signal extraction circuit 26 and the video signal selection circuit 27.

The identification signal extraction circuit 26 detects the line 21 on which the identification signal is superposed, and the digital data (1, 0), (0, 0, 0, (0, 0) corresponding to the identification signals a, b, c are detected by the clamping process and the slicing process. 1), (1, 1) on line 2
Extract from 1. The identification number extracted from the line 21 is designated by the instruction instruction signal for selecting the identification signal from the CPU 23. The identification number extracted by the identification signal extraction circuit 26 is given to the video signal selection circuit 27, and the video signal selection circuit 27 extracts the video signal to which the identification number is added based on the identification number from the identification number extraction circuit 26. It The extracted video signal is written in the image memory 28.

The reading and display control of the video signal written in the image memory 28 is controlled by the small screen instruction control circuit 29. The small screen instruction control circuit 29 uses the image memory 2 based on an instruction signal from the CPU 23 indicating an instruction from the user.
9 is controlled. The small screen instruction control circuit 29 performs processing such as framing on the small screen of the video signal corresponding to each channel that constitutes the video signal written in the image memory 28.

The video signal to which the corresponding identification signal is added is given to the switching circuit 25, and the switching circuit 25 switches to either one of the video signal to which the identification signal is added and each of the video signals from 1ch to 27ch. The video signal output from the switching circuit 25 is given to the display device 30, and the display device 30 displays the video corresponding to the video signal input thereto.

Next, the operations of the video signal transmitter 11 and the video signal receiver 21 will be described.

First, in the video signal transmitting apparatus 11, the multi-screen synthesis circuit 12 generates a multi-screen display video signal 102 including each video signal from 1ch to 9ch, and the multi-screen synthesis circuit 13 generates a video signal from 10ch to 18ch. The multi-screen display video signal 103 including each video signal is generated, and the multi-screen synthesis circuit 14 generates the multi-screen display video signal 104 including each video signal from 19ch to 27ch.

Each of the multi-screen display video signals 102, 103,
The output of 104 is performed based on the timing signal 105 generated by the timing signal generation circuit 15, and the multi-screen display video signals 102, 103 and 104 are given to the time division synthesis circuit 16.

The time-division synthesizing circuit 16 sequentially switches the multi-screen display video signals 102, 103, 104 on a frame-by-frame basis based on the timing signal 105 from the timing signal generating circuit 15, and the multi-screen display video signal 102 is displayed. ，
Video signal 103 for multi-screen display, video signal 1 for multi-screen display
The time-division combined signal 106 arranged in the order of 04 is generated.

The time division composite signal 106 is given to the identification signal addition circuit 17, and the identification signal addition circuit 17 constitutes the time division combination circuit 106 for each multi-screen display video signal 102, 1.
An identification signal a, 03, 104 for identifying
b and c are added. The video signal 107 to which the identification signals a, b and c are added is the video signal 102a to which the identification signal a is added and the video signal 103 to which the identification signal b is added.
b, the video signal 104c to which the identification signal c is added is sequentially arranged. The respective digital data of (1,0), (0,1) and (1,1) corresponding to the respective identification numbers a, b and c are superimposed on the line 21 during the vertical blanking period as a luminance component. .

The video signal 107 is given to the transmission circuit 18. The transmission circuit 18 sends out the video signal 107 on a dedicated channel via a transmission line and also from 1ch to 27ch.
The corresponding video signal is sent to the video signal receiving device 21 in a normal form.

The video signal receiving device 21 receives the video signal of the dedicated channel and the video signals corresponding to 1ch to 27ch, and the tuner 22 selects a channel. A control signal indicating a user's instruction is given to the tuner 22 from the CPU 23, and the tuner 22 selects a predetermined channel from each channel from 1ch to 27ch and a dedicated channel based on the control signal from the CPU 23.

When the dedicated channel is selected, the video signal of the dedicated channel is supplied to the identification signal extraction circuit 26 and the video signal selection circuit 27 via the video processing circuit 24.

When selecting the video signal with the identification number b, the CPU 23 outputs an instruction signal for instructing the selection of the video signal with the identification number b, and the instruction signal is given to the identification signal extraction circuit 26. To be Identification signal extraction circuit 2
6 detects the line 21 on which the identification signal b is superimposed on the basis of the instruction signal from the CPU 23, and performs digital processing (1, 0), (0, 1), ((0, 1), ( 1, 1) is pulled out from the line 21. The digital data (0, 1) corresponding to the identification number b extracted by the identification signal extraction circuit 26 is supplied to the video signal selection circuit 27, and the video signal selection circuit 27 outputs the digital data (0, 1) from the identification number extraction circuit 26. Based on 1), the video signal to which the identification number b is added is extracted. The extracted video signal is written in the image memory 28.

The read control of the video signal written in the image memory 28 is performed by the small screen instruction control circuit 29, and the instruction for this read control is issued from the CPU 23. Then, the video signal read from the image memory 29 is given to the display device 30 via the switching circuit 25, and the display device 30 displays the video corresponding to the video signal to which the identification number b is added.

In this display, as shown in FIG.
Each image from h to 18ch is displayed on each of the 9 screen small screens. Since the image displayed on each small screen is updated once every three frames, this image is displayed as a pseudo moving image.

Next, for example, while the user is looking at the screen of the display device 30, the CPU 23 selects the 17ch and the CPU 2
3 is instructed, the small screen instruction control device 29 receiving this instruction from the CPU 23 frames the 17ch facet displayed on the screen of the display device 30 to confirm the selection of 17ch to the user. Can be made. At approximately the same time as this framing process, the CPU 23 sets the tuner 22 to 17
Instructing the selection of ch, the tuner 22 selects 17ch. The video signal of 17ch is given to the switching circuit 25 via the video processing circuit 24, and the switching circuit 25 switches from the video signal of the dedicated channel to the video signal of 17ch. Switching circuit 25
The video signal of 17ch from is given to the display device 30,
The display device 30 displays an image corresponding to the image signal on its screen.

As described above, the video signal transmitting device 11, that is, the broadcasting station side, generates a plurality of multi-screen display video signals in advance, and adds an identification number for identifying each multi-screen display video signal. , The video signal to which the identification number is added is transmitted through one dedicated channel. The video signal receiving means 21, that is, the receiver side, selects the video signal corresponding to each identification number and displays the video signal of the predetermined identification number. Therefore, in a multi-channel medium such as CATV, all the small screens constituting the multi-screen can be displayed as pseudo moving images without increasing the number of dedicated channels for multi-screen display, and a predetermined channel can be selected from the displayed contents. You can

Further, each video signal can be classified by genre in accordance with the identification signal added to each multi-screen display video signal, and the channel selection by the user becomes easier.

The number of channels described in this embodiment,
The number of small screens and the name of the switching unit in time-division synthesis are not limited, and other numbers in place of the present embodiment can be set.

Further, in the present embodiment, the number of dedicated channels is 1, but it is also possible to use several dedicated channels according to the genre instead.

[0051]

As described above, according to the video signal transmitting apparatus and the video signal receiving apparatus of the present invention, all the small screens constituting the multi-screen can be displayed without increasing the dedicated channels for multi-screen display. The video can be displayed as a moving image.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of a video signal transmitting apparatus of the present invention.

FIG. 2 is a diagram for explaining an operation of adding an identification signal in the video signal transmitting apparatus of FIG.

FIG. 3 is a block diagram showing an embodiment of a video signal receiving device of the present invention.

[Explanation of symbols]

11 ... Video signal transmitting device, 12, 13, 14 ... Multi-screen synthesizing circuit, 15 ... Timing signal generating circuit, 16 ... Time division synthesizing circuit, 17 ... Identification signal adding circuit, 18 ... Transmitting circuit,
21 ... Video signal receiving circuit, 22 ... Tuner, 23 ... CP
U, 24 ... Video signal processing circuit, 25 ... Switching circuit, 26 ...
Identification signal extraction circuit, 27 ... Video signal selection circuit, 28 ... Image memory, 29 ... Small screen instruction control circuit, 30 ... Display device.

Claims (2)

[Claims] 1. A multi-screen synthesizing means for generating a plurality of multi-screen display video signals by editing a video signal transmitted for each channel, and a frame unit for each of the multi-screen display video signals,
Time division composing means for performing a time division compositing process in a predetermined unit such as a field unit to generate a plurality of multi-screen display video signals for each unit, and a multi screen for each unit generated by the time division composing means. Identification signal adding means for adding an identification signal corresponding to each of the display video signals to generate a plurality of identification signal-added video signals to which the identification signals are added, a video signal of each channel, and an identification signal-added video signal And a transmission means for transmitting the signal to a transmission path. 2. A video signal receiving device for receiving each video signal and each identification signal-added video signal from the video signal transmitting device according to claim 1, wherein the video signal transmitting device receives the video signal and the identification signal added video signal via the transmission line. Receiving means for receiving by selecting a predetermined video signal from among the video signals for each channel and the identification signal-added video signals transmitted by the above, and an identification signal instructed from the identification signal-added video signals. Identification signal detecting means for detecting, and a video signal added with the identification signal based on the identification signal detected by the identification signal detecting means is extracted from each identification signal-added video signal, and the extracted identification signal is added Writing means for writing the video signal in the image memory, reading the identification signal added video signal written in the image memory, and displaying the read identification signal added video signal on the screen. A video signal receiving apparatus comprising: a display unit shown in the figure; and a selection instruction unit for selecting and instructing a desired video signal from a plurality of video signals included in the identification signal-added video signal.