Television receiver

Description: TECHNICAL FIELD [Detailed description of the invention]

【0001】

[Technical field to which the invention belongs]

The present invention relates to a television receiver, and relates to a technique of connecting to a network to process information and display it on a television screen.

【0002】

[Conventional technology]

In recent years, television receivers include teletext data sent from broadcasting stations as information obtained at home. Television receivers have been developed that process this teletext data and display it on a television screen. As relating to such a television receiver, there is a description in Japanese Patent Application Laid-Open No. 8-98101.

【0003】

The operation of this television receiver will be described below.

【0004】

Figure 2 is a block diagram showing the signal processing of a conventional television receiver. 20 is a video input terminal, 21 is an input switching circuit, 22 is a video switch, 23 is a deflection circuit, 24 is a video output circuit, and 25 is a brown tube. , 26 is a voice switch, 27 is a voice output circuit, 28 is a speaker, 29 is an external data input / output terminal, 30 is a character multiplex decoder, 31 is an input data processing circuit, 32 is an input / output data processing circuit, 33 is a display processing circuit. , 34 is a voice processing circuit, and 35 is a central information processing circuit (hereinafter abbreviated as CPU).

【0005】

The video signal input from the video input terminal 20 is input to the input switching circuit 21, and a plurality of input video signals are switched and output. The deflection circuit 23 drives the deflection circuit based on the signal output from the input switching circuit 21. The video switch 22 switches and outputs the video signal output from the input switching circuit 21 and the signal output from the teletext decoder 30. The voice switch 26 switches and outputs the voice signal output from the input switching circuit 21 and the signal output from the teletext decoder 30. The video output circuit 24 amplifies the signal output from the video switch 22 to drive the cathode ray tube 25, and the video is displayed on the television screen. The audio output circuit 27 amplifies the audio signal output from the audio switch 26 to drive the speaker 28, and the speaker 28 outputs audio to the viewer.

【0006】

The input data processing circuit 31 extracts the character multiplexing signal included in the video signal input from the video input terminal 20, equalizes the waveform, and corrects the error. When the character multiplexing data output from the input data processing circuit 31 is character code and bitmap data, the CPU 35 outputs these character multiplexing data to the display processing circuit 33, and when the character multiplexing data is voice data, the CPU 35 processes the voice. Output to circuit 34. The input / output data processing circuit 32 is connected to the external data input / output terminal 29, and exchanges information with an externally connected device. This makes it possible to display external information on a television and output teletext data to an external device.

【0007】

[Problems to be Solved by the Invention]

In the above conventional example, the method of processing character multiplex data and the connection with an external device are described, but the screen size and the method of displaying different information when actually displaying on the screen are not described. ..

【0008】

An object of the present invention is to solve the above problems and to provide an optimum screen display system for displaying external information on a television receiver.

【0009】

[Means for solving problems]

In order to achieve the above object, in the present invention, an image conversion means that converts and outputs an image size of at least one or more input image signals and at least two or more image signals output from the image conversion means. An image synthesis means that synthesizes and converts into one signal, a voice synthesis means that synthesizes at least two or more input voice signals and converts them into one signal, and an image that is processed by inputting external information. The configuration includes a synthesis means and an information processing means for controlling the voice synthesis means.

【0010】

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, examples of the present invention will be described. FIG. 1 is a block diagram showing a first embodiment of the present invention.

【0011】

In the figure, 101 is an image processing circuit, 102 is an image conversion circuit, 103 is a first image conversion circuit, 104 is a second image conversion circuit, 105 is an image synthesis circuit, 107 is a voice synthesis circuit, and 108 is an information processing circuit. 109 is an external information input / output terminal, 111 is MODEM, 112 is a display control processing circuit, 113 is a voice control processing circuit, 114 is a data bus, and the same parts as those in FIG. 1 are designated by the same reference numerals.

【0012】

Next, the circuit operation will be described. Since the same parts as those in FIG. 1 operate in the same manner, the description thereof will be omitted.

【0013】

The video signal input to the image processing circuit 101 undergoes processing such as Y / C separation, color demodulation, and image quality control, is converted into an RGB signal, and is output. The output RGB signal is input to the image conversion circuit 102. The image conversion circuit 102 is composed of a first image conversion circuit 103 and a second image conversion circuit 104. The first image conversion circuit 103 mainly converts a television image, and the second image conversion circuit mainly converts a graphic image. Perform the conversion. The image size of the RGB signal input to the first image conversion circuit 103 is converted by the control signal output from the display control circuit 112.

【0014】

On the other hand, when a telephone line is connected to the external information input / output terminal 109, MODEM111 performs processing such as data modulation / demodulation and error correction, and inputs / outputs data to / from the data bus 114. The CPU 35, which inputs data from the data bus 114, processes the data, creates document data in HTML (Hyper Text Markup Language) format, and outputs it to the display control processing circuit 112. The display control processing circuit 112 processes the input HTML document data so that it can be displayed as actual screen information. The information processed by the display control processing circuit 112 is output as an RGB signal and input to the second image conversion circuit 104 of the image conversion circuit 102. The image size of the RGB signal input to the second image conversion circuit 104 is converted by the control signal output from the display control circuit 112.

【0015】

The RGB signal converted by the image conversion circuit 102 is input to the image composition circuit 105. The image composition circuit 105 synthesizes two input RGB signals, converts them into one RGB signal, and outputs the signal. The RGB signal output from the image synthesis circuit 105 is amplified by the video output circuit 24 and input to the cathode ray tube 25, and an image is displayed. FIG. 3 is a diagram showing a state when it is actually displayed on the TV screen. 301 is the appearance of the television receiver, 302 is the first video part, and 303 is the second video part. The first video portion 302 is horizontally compressed in half in the first image conversion circuit 103, and the second video portion 303 is horizontally compressed in half in the second image conversion circuit 104. After that, the image composition circuit 105 combines the two images and converts them into one image. This makes it possible to view two pieces of information at the same time. At this time, which information is output to which screen can be selected by the viewer.

【0016】

Next, the voice control processing circuit 113 processes the operation sound indicating the operation of the viewer and the voice information obtained from the external information under the control of the CPU 35, converts the voice information into a voice signal, and outputs the voice signal. The output voice signal is input to the voice synthesis circuit 107, and is synthesized by the voice signal output from the image processing circuit 101 and the control signal output from the voice control processing circuit 113.

【0017】

Here, a specific method of image composition will be described.

【0018】

First, the first method will be described. For example, when exchanging data via MODEM111, the connection destination line may be busy and the data transfer speed may be slow. In such a case, the CPU constantly monitors the transfer speed and changes the screen size according to the speed. In FIG. 3, it is assumed that the television image is displayed on the video portion 302 and the HTML document created by the CPU is displayed on the video portion 303. When the transfer speed is slow, the area of the video portion 302 is increased and the area of the video portion 303 is reduced by the control signals a and b output from the display control processing circuit 112. As a result, the television image is displayed on the screen in a large size, so that the waiting state of the viewer can be improved even when the information such as the Internet cannot be displayed immediately. Also, in the case of voice, when the transfer speed is slow, the control signal c output from the voice control processing circuit 113 increases the sound of the TV image when synthesized by the voice synthesis circuit 107, and is related to the HTML document. Reduce the voice to be played.

【0019】

Next, the second method will be described. In FIG. 3, a method of dividing the screen and displaying two images at the same time has been described, but as shown in FIG. 6, there is also a method of displaying the child image 602 on top of the parent image 601. In this method, the image conversion circuit 102 creates a screen having the size shown in FIG. 6 in advance, and the image composition circuit 105 actually synthesizes the image. At that time, according to the composition method in which the child image 602 is switched so as to completely overlap with the parent image 601, there is an effect that the child image 602 can be viewed preferentially. Further, when the transfer speed control signal a is output from the display control processing circuit 112, the waiting state of the viewer can be improved by changing the size to the child image 602 created by the image conversion circuit 102.

【0020】

Next, the third method will be described. In FIG. 6, the method of completely switching between the parent image 601 and the child image 602 has been described by the second method, but there is also a method of synthesizing images by mixing the images. For example, in the image synthesis circuit 105, the two input image signals are alternately switched for each dot. This makes it possible to obtain an image in which the two images are mixed. In this case, even if the child image 602 is displayed on the parent image 601 but the parent image 601 can be viewed, there is an effect that the information of the parent image 601 can be displayed without being lost. When the transfer speed changes, the priority of the image can be controlled by changing the ratio of alternating dots in the image composition circuit 105 with the control signal b output from the display control processing circuit 112. ..

【0021】

Next, the fourth method will be described. In the third method, as a method of mixing images, a method of switching for each dot was shown, but it is displayed by halving the amplitude of both and adding the child image 602 with a DC offset. There is also a way to do it. When the transfer speed changes, the control signal b output from the display control processing circuit 112 controls the priority of the image by changing the amplitude ratio or the DC offset level in the image composition circuit 105. can do. In particular, the DC offset may be set to 0.

【0022】

In the first embodiment, the case where the signal output from the image processing circuit 101 and the display control processing circuit 112 is an RGB signal is shown, but a Y-color difference signal can also be processed by the same method. .. Further, the control signals a, b, and c output from the display control processing circuit 112 and the voice control processing circuit 113 may be directly output from the CPU 35 when a CPU having an external input / output function is used.

【0023】

Next, a second embodiment of the present invention will be described. FIG. 4 is a block diagram showing a second embodiment of the present invention.

【0024】

In the figure, the same parts as those in FIGS. 1 and 2 are designated by the same reference numerals.

【0025】

Next, the circuit operation will be described. Since the same parts as those in FIGS. 1 and 2 operate in the same manner, the description thereof will be omitted. In FIG. 4, the character multiplexing data processed by the input data processing circuit 31 and the HTML document obtained from MODEM 111 are processed by the CPU 35 and then input to the display control processing circuit 112. The display control processing circuit 112 divides the display area into two input data and compresses them in the horizontal and vertical directions to form an image. FIG. 8 shows an example of displaying three different images at the same time. In the first image portion 801, character multiplexing data whose image size is compressed in the horizontal and vertical directions by the display control processing circuit 112 is displayed. The second image portion 802 displays an HTML document whose image size is compressed in the horizontal and vertical directions by the display control processing circuit 112, and the third image portion 803 is compressed in the horizontal direction by the image conversion circuit 102. The TV image is displayed. This has the effect of allowing you to enjoy three different images at the same time. Further, in the above, the display locations of the three images are specified, but the images actually displayed do not specify the locations in particular, and the HTML document is displayed in the third image portion 803, and the first image is displayed. There is no problem even if the TV image is displayed in the part 801.

【0026】

Next, a third embodiment of the present invention will be described. FIG. 5 is a block diagram showing a third embodiment of the present invention.

【0027】

In the figure, 501 is an external information input circuit, 502 is an external information input terminal, and the same parts as those in FIGS. 1 and 2 are designated by the same reference numerals.

【0028】

Next, the circuit operation will be described. Since the same parts as those in FIGS. 1 and 2 operate in the same manner, the description thereof will be omitted. In FIG. 5, when a CD-ROM player is connected to the external information input terminal 502 and a music CD is played, a music signal or the like is input to the external information input circuit 501. When an audio signal is input from a music CD, for example, when an HTML document is mainly viewed, the audio of the music CD is output as audio information. As a result, the sound of the music CD can be effectively used when viewing the HTML document. In this example, the voice data is directly connected to the data bus 114 from the external information input circuit 501, but only the control of the external device is performed from the external information input circuit 501, and the voice data is directly input to the voice synthesis circuit 107. It may be configured to do so.

【0029】

Further, when a CD-ROM player is connected to the external information input terminal 502, a video CD is played back and a digital video signal is input, and the data format is a compression format such as the MPEG format, the external information input circuit. Data is demodulated by 501 or CPU35, and the image data and audio data demodulated via the data bus 114 are input to the display control processing circuit 112 and audio control processing circuit 113, displayed on the screen, and the audio is output. .. In this example, the image data and audio data are directly connected from the external information input circuit 501 to the data bus 114, but only the control of the external device and the demodulation of the compressed data are performed from the external information input circuit 501, and the image data. May be configured to be demolished by the external information input circuit 501 and then directly input to the image conversion circuit 102, and the audio data may be demolished by the external information input circuit 501 and then directly input to the audio synthesis circuit 107. When another device is connected to the external information input circuit 501, it can be processed in the same manner.

【0030】

Next, a fourth embodiment of the present invention will be described. FIG. 7 is a block diagram showing a fourth embodiment of the present invention.

【0031】

In the figure, 701 is an external control circuit, and the same parts as those in FIGS. 1 and 2 are designated by the same reference numerals.

【0032】

Next, the circuit operation will be described. Since the same parts as those in FIGS. 1 and 2 operate in the same manner, the description thereof will be omitted. In FIG. 7, the external control circuit 701 generates and outputs the control signals a, b, and c shown in the above embodiment based on the information sent from the CPU 35 via the data bus 114. As a result, the display control processing circuit 112 and the voice control processing circuit 113 do not have to directly output the control signal, so that there is an effect that the processing contents of each circuit can be separated.

【0033】

[Effect of the invention]

According to the present invention, when the external information is displayed on the television receiver, the state of the screen can be controlled by the content of the external information, so that there is an effect that the optimum screen display system can be provided to the viewer.

[Simple explanation of drawings]

[Figure 1]

It is a block diagram which shows one Example of this invention.

[Figure 2]

It is a block diagram which shows the prior art.

[Fig. 3]

It is a schematic diagram which shows the state of a screen.

[Fig. 4]

It is a block diagram which shows the 2nd Example of this invention.

[Fig. 5]

It is a block diagram which shows the 3rd Example of this invention.

[Fig. 6]

It is a schematic diagram which shows the state of a screen.

[Fig. 7]

It is a block diagram which shows the 4th Example of this invention.

[Fig. 8]

It is a schematic diagram which shows the state of a screen.

[Explanation of symbols]

101 ... image processing circuit, 102 ... image conversion circuit, 105 ... Image synthesis circuit, 107 ... Speech synthesis circuit, 108 ... Information processing circuit, 109 ... External information input / output terminal.