JPH03106213A - Channel search device in television receiver - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a channel search device using multiple screens. [Prior Art] As a device for searching reception channels of a television receiver, the program contents of each channel currently being broadcast are actually displayed for all channels on a display screen using a multi-division method, and the desired channel can be selected from there. There is something to choose from.

This device selects channels one by one using a tuner, sequentially writes them into a frame memory, and divides the written contents into display screens for multi-display.

Therefore, at the time of channel selection, the screen of the program in question is a moving image (no audio), but when the next channel is specified, the screen of the previously specified channel changes to a still image. Then, when the image of the last designated channel changes from a moving image to a still image, the above operation is repeated again after a predetermined period of time (several to several tens of seconds) has elapsed from that point. For example, as shown in Figure 3, when displaying on 9 multi-screens, images of different channels are displayed sequentially from screens A to ■, and the last screen changes from a video to a still image. When a predetermined time has elapsed, A returns to a new moving image and changes to a still image, and this process is repeated.

[Problem to be solved by the invention]

Therefore, in such a method, since the image to be selected is a still image without sound, there is a problem in that it is difficult to accurately grasp the contents of the image.

The present invention has been made in view of these points, and its purpose is to display a moving image on any one of the screens of a plurality of channels displayed on a multi-screen, and also to output audio.
To provide a channel search device that can accurately grasp image contents.

[Means to solve the problem]

To this end, the present invention includes a first tuner and a first frame memory that stores images of a plurality of channels selected by the first tuner, and a multi-screen image of the plurality of channels. A channel search device for a television receiver configured to display still images depending on the format includes a second tuner and a second frame memory for storing an image of a specific channel selected by the second tuner. The image of the specific channel among the plurality of images stored in the first frame memory is switched with the image stored in the second frame memory to display a moving image, and the image of the specific channel is displayed as a moving image. Added the ability to play audio related to images.

〔Example〕

Examples of the present invention will be described below. FIG. 1 is a diagram showing a general block diagram of a television receiver according to one embodiment. Here, a nine-screen multi-screen will be explained. 1
1 is an antenna, and 2 and 3 are tuners having a channel selection section and a video processing circuit section. In particular, the tuner 3 also has an audio processing circuit section.

4 and 5 are A/D converters that convert the image signals selected by tuners 2 and 3 into approximately 6-bit digital signals, 6 is a frame memory for storing screen data for multi-display, and 7 is for video display. 8 is a switching circuit for replacing one image in the multi-image data from the frame memory 6 with the image output from the frame memory 7, and 9 is a D/A conversion for converting a digital signal into an analog signal. 10 is a switching circuit for selecting the image signal from the tuner 3 and the image signal from the D/A converter 9; 11 is an on-screen circuit for superimposing characters and symbols on the screen; 12 is an image display 13 is a speaker for reproducing the audio signal from the tuner 3, and 14 is a control circuit for controlling the entire system.

In this device, in the channel selection mode, the channels of the tuner 2 are sequentially switched by the control circuit 14, and the image signal of the channel is converted into a digital signal by the A/D converter 4 and written into the frame memory 6.

Writing for one screen is reduced to 1/3 by capturing pixels in the horizontal direction at a rate of 1 pixel for every 3 pixels, and also in the vertical direction by capturing at a rate of 1 scanning line for every 3 scanning lines. /3. In the horizontal direction, this can also be done by setting the sampling frequency of the A/D converter to a frequency of 173, which is the frequency when processing all pixels.

Then, the reduced image data of 1/3 vertically and horizontally of a total of nine channels is written into the frame memory 6 so that the display mode is evenly divided into nine parts. Note that there is no data for channels that are not broadcast.

Regarding this frame memory 6, by continuing to write data from the start of writing, on the screen of CTRL2,
As shown in FIG. 3, still images from screen A (image of the broadcast program with the lowest channel number) to screen 2 (image of the broadcast program with the highest channel number) are displayed in order. At this time, by outputting channel display data from the control circuit 14 to the on-screen circuit 1l, the channel number of each image A-1 is displayed at the bottom of the image (not shown). In this way, a multi-screen is displayed on the CRT 12, and all the screens are switched at a predetermined cycle.

At this time, when the control circuit 14 specifies the channel number of any screen among the multi-displayed screens to the tuner 3, the image of that channel is stored in the frame memory 7 in the vertical and horizontal directions with the same reduction ratio as above. The data is written after being reduced at a reduction rate of 1/3, and reading is performed simultaneously with this writing.

Then, in the switching circuit 8, this read image data is replaced with image data of the same channel as the channel image written in the frame memory 7, among the image data read from the other frame memory 6. This replaced channel image is a video. For example, if image E is replaced, as shown in Figure 2,
The image in the middle changes from a still image to a video. In addition,
At this time, for the screen displayed in the video, use speaker 1.
3, the audio will be played.

From the above, when the control circuit 14 specifies the channel that the tuner 3 actually desires to receive from among the plurality of still images reproduced by the frame memory 6, the image corresponding to the specified channel is displayed as a still image. It changes from to a video, and the audio starts playing. Therefore, by repeating this video designation operation across different channels, it is possible to grasp accurate broadcast content for all channels. At this time, since still images are displayed for the remaining channels, it is possible to understand the broadcast contents of these channels to some extent, although not completely.

If you wish to continuously receive images of the channel specified by the tuner 3 through the above operation, if you switch the switching circuit 10 to the tuner 3 side using the control circuit 14, the screen on the CRT 12 The image of the channel specified by the tuner 3 will be displayed on the entire screen.

In the above embodiment, the case where nine channels are multi-displayed has been described, but the number of multi-display screens can be set arbitrarily.

〔Effect of the invention〕

As described above, according to the present invention, by specifying the channel of a specific image among a plurality of images displayed in multiple ways, the image of the channel can be changed from a still image to a moving image, and the audio of the channel can be played back. Therefore, it is possible to easily and reliably confirm the exact broadcast contents of the channel in question, while the general broadcast contents of other channels can be confirmed using still images.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing a schematic structure of a television receiver according to an embodiment of the present invention, FIG. 2 is an explanatory diagram of a multi-screen displayed by this embodiment, and FIG. It is an explanatory diagram of a screen. 1... Antenna, 2, 3... Tuner, 4, 5...
・A/D converter, 6, 7...Frame memory, 8...
・Switching circuit, 9...D/A converter, 10...Switching circuit, 11...On-screen circuit, 12...CRT
, 13... Speaker, 14... Control circuit.

Claims (1)

[Claims] (1), comprising a first tuner and a first frame memory that stores images of a plurality of channels selected by the first tuner, and freezes images of the plurality of channels in a multi-screen format; A channel search device for a television receiver configured to display an image, comprising a second tuner and a second frame memory for storing an image of a specific channel selected by the second tuner, The image of the specific channel among the plurality of images stored in the first frame memory is switched with the image stored in the second frame memory to display a moving image, and the audio related to the image of the specific channel is displayed. A channel search device in a television receiver, characterized in that it reproduces.