JPH0654269A - Television receiver - Google Patents

Abstract

PURPOSE:To enable a user to immediately see the still pictures of plural current broadcast contents on one screen only by switching of a changeover switch by reducing and dividing plural broadcast reception pictures by an auxiliary tuner to store them as still pictures during normal reception by a main tuner. CONSTITUTION:During normal reception, received broadcast channel data is sent from a control circuit part 13 to a main tuner part 2 and is displayed on a CRT picture display part 6 by an output video circuit part 5. In this period, the control circuit part 13 outputs reception channel data to an auxiliary tuner part 7 and stores it in a memory address and timing control circuit part 12 and designates the display position to store data in a memory part 10. That is, data is divisionally stored in the memory 10 while changing the reception channel, and reduced still pictures of many broadcast channels can be divisionally displayed on one screen. Switching between these multiple still pictures and the normal reception picture is realized by switching of a switch 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a television receiver, and more particularly to a television receiver having a multi-screen function for dividing one screen and simultaneously displaying received images of a plurality of broadcast channels as reduced still images. .

[0002]

2. Description of the Related Art Conventionally, as a television receiver having two tuners of this type, as shown in FIG. 3, an antenna 1 for receiving a broadcast signal, a main tuner section 2 for receiving a television signal and a sub-channel are provided. The tuner unit 7, the main intermediate video circuit unit 3 for demodulating the intermediate video signal into a video signal, the sub intermediate video circuit unit 8, the normal television reception signal output from the intermediate video circuit 3 and the storage unit 10 A video signal switching circuit unit 8 for switching video signals of still images of a plurality of broadcast channels, an output video circuit unit 5 for displaying the video signals on a screen, a CRT screen display unit 6, and a video signal in a memory. An A / D conversion unit 9 for converting into a digital signal for storage, a memory unit 10 for dividing and storing, and a unit for converting the divided and stored image data into an analog signal. D / A strange And parts 11, the address of the memory and the A
A circuit section 12 for controlling the timing of the / D conversion section and the D / A conversion section, a control circuit section 13, and a video signal changeover switch 14 for switching a television signal for dividing and storing the television signal. And (for example, Japanese Patent Publication No. 60-17274).

Next, the operation will be described.

During the normal television receiving image state, the control circuit section 13 sends broadcast channel data to the main tuner section 2. The television signal output from the main tuner 2 passes through the contact point a of the main intermediate video signal circuit 3 and the video signal changeover switch 4, and the output video circuit portion 5 displays the television received image on the CRT screen display portion 6. Here, when the multi-screen start switch is turned on, the preset 9 broadcast channels are shared by the main tuner 2 and the sub-tuner 7 of the two tuners, and the control circuit unit 13 is assigned to the two tuners at regular intervals. Sequential tuning data is given and repeated tuning is started. Two tuners 2
Channels 7 and 7 alternately select channels at half the fixed period, and take out a stable television signal during the period of writing in the memory section 10. For example, when the tuning of the main tuner 2 is stable, it is switched to the contact c of the video signal changeover switch 14 so that the television signal enters the A / D conversion section 9 and becomes a digital signal, and the storage capacity for multiple screens is saved. The data is written in the designated area of the memory 10 that is included. In the next half cycle, the tuning of the sub-tuner unit 7 becomes stable, and the video signal changeover switch 14 is switched to the contact point d to write to the next designated memory area. This half cycle operation is repeated twice. At the time of writing to the memory unit 10, a signal is extracted at a ratio of one scanning line to three scanning lines, and one frame (one screen) is written to each storage element at a designated memory address, thereby sequentially dividing and reducing still images. Is memorized.

On the other hand, during this period, the signals read from the memory section 10 are successively read out in a specified order at a speed three times as fast as the writing speed, and reconverted into analog signals by the D / A conversion section 11. , Is passed through the contact b of the video signal changeover switch 4, and is displayed on the CRT screen display unit 6 by the output video circuit unit 5. Thus, as shown in FIG.
The received images of a plurality of broadcast channels are sequentially displayed as reduced still images by dividing them on one screen.

[0006]

Conventionally, a television receiver of this type has a function of dividing a received image of a plurality of predetermined broadcasting channels into one screen and displaying the still image by reducing the received image. It is necessary to sequentially and repeatedly select a plurality of broadcast channels by the tuner at the start of the multi-screen display, and to individually write and store the television signal to a predetermined address of the memory, and read and display the predetermined signal. It took a few seconds to display all the reduced still images of several broadcast channels.

Therefore, an object of the present invention is to provide a television receiver which minimizes the time required to divide a screen and reduce received images of a predetermined number of broadcast channels to display still images. It is in.

[0008]

SUMMARY OF THE INVENTION Therefore, the present invention has, in order to achieve the above-mentioned objects, two tuners, one main tuner of which, while acting as a conventional television receiver, One sub-tuner sequentially and repeatedly selects a plurality of broadcast channels, a channel selection unit, an A / D conversion unit that converts a television signal of each broadcast channel obtained from the channel selection unit into a digital signal, and a predetermined memory unit. Storage means for intermittently writing and storing the individual addresses to the addresses, and means for reading the television signals of the respective broadcast channels at high speed from the storage means in a predetermined order corresponding to the screen position,
A plurality of D / A converters for re-converting the video signal reproduced from the memory unit into analog signals and a switching unit for switching between the reproduced video signal and a normal television signal received by the main tuner are provided. A television receiver characterized by a multi-screen function of displaying a reduced still image of a broadcast channel in a divided manner on one screen and a normal television received image being switched immediately.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, one embodiment of the present invention will be described with reference to FIGS.
Will be described with reference to. In FIG. 1, 1 is an antenna for receiving a broadcast signal, 2 is a main tuner section as an ordinary television receiver, 3 is a main intermediate video circuit section for demodulating an intermediate video signal into a video signal, and 4 is one screen divided. A video signal changeover switch for switching between a video signal for displaying a still image by reducing received images of a predetermined number of broadcast channels and a normal received video signal, and 5 is an output video circuit for displaying the video signal on the screen. 6 is a screen display unit in which a plurality of received images are divided and displayed, 7 is a sub-tuner unit for demodulating a received signal of a broadcast channel for creating a multi-screen into an intermediate video signal, 8 Is a sub intermediate video circuit unit for demodulating the intermediate video signal into a video signal, 9 is an A / D conversion unit for converting the video signal into a digital signal for storage in a memory,
Reference numeral 10 is a memory unit for dividing and storing, 11 is a D / A converting unit for converting the divided and storing image data into an analog signal, and 12 is a memory address and A / D.
A conversion unit, a circuit unit for controlling the timing of the D / A conversion unit,
Reference numeral 13 is a control circuit section.

Next, the operation will be described.

During the normal television reception image state, the control circuit section 13 sends broadcast channel data to the main tuner section 2. The television signal output from the main tuner 2 passes through the contact point a of the main intermediate video signal circuit 3 and the video signal changeover switch 4, and the output video circuit portion 5 displays the television received image on the CRT screen display portion 6.

In the meantime, as shown in FIG. 2, in order to separately store still images A to I obtained by reducing received images of a plurality of broadcast channels, the control circuit unit 13 sends the received channels to the sub-tuner unit 2. In order to output the data and wait until the received video signal becomes stable, and to store the data in the memory, the memory address and the position to be stored and displayed in the timing control circuit unit 12 are designated and stored in the memory unit 10. Control. The memory address and timing control circuit 12 is A /
Control is performed so that the D converter 9 and the memory 10 and the D / A converter 11 can be divided and stored in the memory 10. By dividing and storing the series of controls in the memory while changing the receiving channel, a multi-screen function of displaying a reduced still image of the received images of a large number of broadcasting channels by dividing the screen on one screen is realized. The switching between the multi still image and the normal television receiving image is realized by switching the switch 7 from the contact a to the contact b.

[0013]

As described above, according to the present invention, while the main tuner is in the normal television reception image state, the sub-tuners reduce and divide the reception images of a plurality of broadcasts and store them as still images. Therefore, since it is possible to perform multi-screen display simply by switching the changeover switch, there is an effect that a still image of a plurality of broadcast contents at that time can be immediately viewed on one screen.

[Brief description of drawings]

FIG. 1 is a block diagram of an embodiment of the present invention.

FIG. 2 is a screen display example according to an embodiment of the present invention.

FIG. 3 is a block diagram of a conventional example.

FIG. 4 is a screen display example of a conventional example.

[Explanation of symbols]

 1 Antenna 2 Main Tuner Section 3 Main Intermediate Video Circuit Section 4 Video Signal Changeover Switch 5 Output Video Circuit Section 6 CRT Display Section 7 Sub Tuner Section 8 Sub Intermediate Video Circuit Section 9 A / D Converter 10 Memory Section 11 D / A converter 12 Memory address and timing control circuit 13 Control circuit 14 Video signal changeover switch

Claims (1)

[Claims] 1. A tuning means having two tuners, wherein one main tuner functions as an ordinary television receiver, while the other sub-tuner sequentially and repeatedly selects a plurality of broadcast channels. And an A / D conversion unit for converting a television signal of each broadcast channel obtained by the channel selection unit into a digital signal, a storage unit for intermittently writing and storing at a predetermined address of the memory unit, and the storage unit. Means for reading the television signal of each broadcast channel at a high speed in a predetermined order corresponding to the screen position, a D / A conversion section for re-converting the video signal reproduced from the memory section into an analog signal, and the reproduced signal. Video signal and a switching unit that switches the normal television signal received by the main tuner, and divides the reduced still images of multiple broadcast channels onto one screen. A television receiver characterized by a multi-screen function for displaying and a normal television reception image that can be instantly switched and displayed.