JPH0430674A - Television receiver - Google Patents

Abstract

PURPOSE:To simply attain detailed adjustment in matching with the preference of the operator by allowing a microcomputer to receive a picture quality designation signal and an audio quality designation signal from an operation section corresponding to the picture quality and the audio quality selected by the operator and generating a picture quality designation signal and an audio quality designation signal corresponding to the designation signals. CONSTITUTION:When the operator designates picture quality by using a picture quality button 11a and a picture quality designation signal is inputted to a microcomputer 12, a picture quality input circuit 12a of the microcomputer 12 designates the designated picture quality and each picture quality DAC output control circuit 12b decides the state of plural items corresponding to the designated picture quality. Each picture quality DAC output control circuit 12b reads the combination condition from a memory. A picture quality control conversion circuit 14 receives a picture quality control signal from the picture quality system DAC and it is converted into a picture quality item control signal controlling each item by a picture quality amplifier circuit 9. The audio quality is adjusted in the similar operation.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a means for a viewer to adjust the picture and sound quality of a television receiver.

BACKGROUND OF THE INVENTION In recent years, as a means for viewers to adjust the image quality and sound quality of television receivers, microcomputer control has been used to perform various functions in image and sound quality, such as brightness and contrast related to image quality.

Devices that control functions such as sharpness have been developed. The same thing can be done with sound quality.

In this case, a means is used in which the microcomputer generates a control signal to control the above-mentioned items related to image quality and sound quality in the video amplification circuit and the audio amplification circuit in response to adjustment button operations. Most of the video amplification circuits and audio amplification circuits are controlled by analog signals. Therefore, the control signal is a digital control signal generated by a microcomputer converted into an analog signal by a D/A conversion circuit (DAC) inside the microcomputer. There are converted control signals, PWM signals, etc. Image quality and sound quality can be adjusted using such control signals in response to a plurality of adjustment items.

Problems to be Solved by the Invention Television receivers have a large number of adjustment items related to image quality and sound quality, and adjusting these items one by one is a tedious task for the viewer. However, if there are many adjustment points, it will be of little value to the viewer. Opportunities for making adjustments like this are when you want to adjust to the most desirable image or sound quality at that time, such as when you move from receiving television signals to playing a videotape, or when the program content changes. be. In such cases, many adjustment items must be adjusted each time.

As a remedy for this, a method has been used to select and adjust several preset adjustment states from a menu, for example, Nuport Position, Video Position, etc., using a single menu selection button. Although it has the advantage of requiring only one operation, since the selection is made from a limited number of adjustment states, the adjustment states are gradual and cannot necessarily be said to be the best adjustment state desired by the operator. For example, there remains the problem that even if a desired state is desired, it cannot be achieved.

The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a television receiver that can easily be finely adjusted to suit the operator's preferences.

Means for Solving the Problems In order to achieve the above object, the present invention provides a method for checking the status of a plurality of items related to image quality in a television receiver that performs image display and audio reproduction by radio wave reception or input from an AV input terminal. an image amplification circuit whose image quality is controlled by inputting an image quality item control signal to be controlled; an audio amplification circuit whose sound quality is controlled by inputting a sound quality item control signal which controls the states of a plurality of items related to sound quality; A picture quality control conversion circuit that generates an item control signal from a picture quality control signal output from a microcomputer; a sound quality control conversion circuit that generates the sound quality item control signal from an audio control signal output from a microcomputer; An input operation unit is provided for performing a playback selection operation and an image quality and sound quality selection operation, and the operation unit includes one image quality button and one sound quality button, and when the image quality button is operated, an image quality designation signal corresponding to the image quality state is generated. and generates a sound quality designation signal corresponding to the sound quality state by operating the sound quality button, and the microcomputer inputs the picture quality designation signal and generates the picture quality control signal in which a plurality of items related to picture quality are set in a preferable combination. Further, the microcomputer inputs the sound quality designation signal and generates the sound quality control signal in which a plurality of items related to sound quality are set in a preferable combination, and the number of states of the preferable setting of the image quality and sound quality is set according to the image quality and the sound quality. This is a television receiver whose sound quality is considered to change almost continuously.

According to the above configuration, the microcomputer inputs the image quality designation signal and the sound quality designation signal from the operation section corresponding to the image quality and sound quality selected by the operator, and performs the image quality control 1 (corresponding to the respective designation signals). The image quality control conversion circuit converts the image quality control signal into an image quality item control signal that controls a plurality of image quality items in the image amplification circuit, and the sound quality control conversion circuit generates the sound quality control signal. is input and converted into a sound quality item control signal that controls a plurality of sound quality items in the audio amplification circuit, and the image and audio amplification circuits each input the item control signal to control the image and sound quality.Input The unit generates a picture quality designation signal corresponding to the picture quality selected by the operator by operating one picture quality button, and generates a sound quality designation signal corresponding to the sound quality selected by the operator by manipulating one sound quality button. do.

Embodiment Hereinafter, a television receiver according to an embodiment of the present invention will be described with reference to FIG. FIG. 1 is a block diagram showing the configuration of a television receiver according to an embodiment of the present invention. As shown in the figure, the television radio wave receiving section is composed of a tuner 1, a video intermediate frequency amplification circuit 2, and a video detection circuit 3, and the reproduced video signal is sent via a switching circuit 8 to a video amplification circuit 9. Audio signals are respectively input to the audio amplifier circuit 6 via the switching circuit 5, and external AV signals, that is, audio signals and video signals are input from the input terminal 4 to the switching circuit 8 and the switching circuit 6, respectively. The signal is input to the audio amplification circuit and the video amplification circuit via the .

In addition, the input section outputs a switching signal in response to the operator's radio wave reception and external AV large input selection operation, and outputs a picture quality designation signal and a sound quality designation signal in response to the video quality and sound quality selection operations, respectively. 11 is connected to a microcomputer 12 that controls the receiver, inputs the switching signal and generates a switching control signal, and inputs the image quality designation signal and sound quality designation signal to generate a picture quality control signal and a sound quality control signal, respectively. The output terminal of the microcomputer 12 that outputs the above is connected to the switching circuits 6 and 8, the image quality control conversion circuit 14, and the sound quality control conversion circuit 13, and the image quality control signal is inputted to control the image quality at the video amplifier. The output terminal of the image quality control conversion circuit 14 that outputs a signal is connected to the video amplification circuit 9.
An output terminal of a sound quality control conversion circuit 13 which inputs the sound quality control signal and outputs a sound item control signal for controlling sound quality in the sound amplification circuit is connected to the sound amplification circuit 6.

The microcomputer also includes an image quality adjustment input circuit 12a that inputs the image quality designation signal inputted from the input section 11 and determines the designated image quality, and a state of a plurality of items related to image quality based on the judgment of the image quality adjustment input circuit 12a. Each image quality system D to be determined
It includes an AC output control circuit 12b and a picture quality DAC output circuit 12c which outputs a picture quality control signal based on the decisions made by each picture quality DAC output control circuit. It includes a control circuit 12e and a sound quality DAC output circuit 12f that outputs a sound quality control signal. The DAC referred to here is one that converts a digital signal generated by a microcomputer into an analog signal, and in this embodiment, the image quality control signal and the sound quality control signal are analog signals. However, it goes without saying that the image quality control signal and the sound quality control signal may be digital signals or other PWM signals.

In the above configuration, the operation will be explained. In Figure 1,
The television signal input from the antenna is regenerated into a video signal and an audio signal by the tuner 1, the video intermediate amplifier circuit 2, and the video detection circuit 3, and is input to one end of the switching circuits 8 and 5, respectively. The external video signal and audio signal input to the input terminal 4 are respectively connected to a switching circuit 8.
is input to the other end of 6. When the operator selects the input of the input section 11 by selecting radio wave reception or AV large input using the button 11c, the microcomputer 12 connected to the input section sends a switching control signal to the switching circuits 8 and 5 in response to the selection. The switching circuits 8 and 5 switch the corresponding video signal and audio signal and input them to the video amplification circuit 9 and the audio input circuit 6, respectively. The video amplification circuit 9 amplifies the video signal and outputs it to the CRTlo to display the video, and the audio amplification circuit 9 amplifies the audio signal and outputs it to the noupika 7 to reproduce audio. Further, when the operator selects the image quality and sound quality according to his/her preference using the image quality button 11a and the sound quality button 11b of the input section 11, the input section outputs an image quality designation signal and a sound quality designation signal to the microcomputer. The image quality designation signal and the sound quality designation signal correspond to a plurality of image qualities and a plurality of sound qualities set in advance, respectively, and are simply numbers such as 1 to 50, and the number of image quality and sound quality settings is the same. There's no need. Image quality will be explained below. When the operator specifies the image quality using the image quality button 11a and an image quality designation signal corresponding to the image quality is input to the microcomputer 12, the image quality input circuit 12a of the microcomputer determines the specified image quality and controls the output of each image quality system DAC. Circuit 11b determines the status of a plurality of items corresponding to the specified image quality. The plurality of items include, for example, brightness, contrast, sharpness, etc. related to image quality, and each item has a plurality of levels in stages, for example, five levels of 1 volt, 2 volt, 3 volt, 4 volts,
Each item takes 5 volts. Many conditions can be set for image quality by combining the above-mentioned items, but in the present invention, preferred combinations of these image qualities are set in advance and numbers are matched. For example, the Bright Nenu, Contranuto,
If six levels are set for each of the three sharpness items, a total of 126 image qualities can be set, and among these, 60 preferred combinations 9 are determined in advance and the numbers are associated with each other. It is also assumed that when these numbers are selected continuously, the image quality is also set to change almost continuously. Such settings are stored in a memory in advance, and each image quality system DAC output control circuit 11b combines and outputs the settings from the memory. FIG. 2 is a waveform diagram showing the image quality control signal of the embodiment. In order to make the image quality control signal an analog control signal, the analog level of the item set in each image quality system DAC output control circuit 12b is This is an example waveform in which Yness, Contrast F, and Nyapuneme are synthesized in this order. This kind of waveform is generated by the built-in D of the microcontroller.
It can be easily generated using a /A conversion circuit. The image quality control conversion circuit 14 inputs an image quality control signal from the image quality system DAC,
The image quality amplification circuit 9 converts each of the above items into an image quality item control signal. For example, if the image quality of the video amplification circuit 9 is controlled by an analog signal, the image quality control signal is temporally decomposed and 2 volts and 2 volts are generated corresponding to the brightness.
Each level of 4 volts corresponding to contrast and 3 volts corresponding to sharpness is input to the video amplification circuit 9.

The image amplifying circuit 9 receives the image quality item control signal and sets the status of each item of brightness, contrast, and sharpness.

The image quality adjustment has been described above, but since the same operation is performed for the sound quality adjustment, the explanation will be omitted.

As described above, according to the television receiver of the embodiment of the present invention, the picture quality and sound quality can be selected using one picture quality button and one sound quality button on the input operation section, and preferred picture quality and sound quality can be set almost continuously according to the selection. By using a television receiver equipped with a means to perform this, the operator can adjust the image quality and sound quality to suit his/her preference with simple operations.

It goes without saying that the number of items related to image quality is not limited to three items and the number of levels is not limited to six levels. Furthermore, it goes without saying that the input operation section can be connected to the receiver for remote control.

Effects of the Invention As is clear from the above embodiments, in a television receiver that displays images and reproduces audio by receiving radio waves or inputting from an AV input terminal, an image quality item control signal that controls the status of a plurality of items related to image quality is used. an image amplification circuit in which the image quality is controlled by inputting a sound quality item control signal to control the state of a plurality of items related to sound quality; A picture quality control conversion circuit that generates from the output picture quality control signal; a sound quality control conversion circuit that generates the sound quality item control signal from the sound quality control signal output from the microcomputer; and an operator's selection operation of television reception or AV playback and image quality. and a manual operation unit for performing a sound quality selection operation, the operation unit having one image quality button and one sound quality button, and generating an image quality designation signal corresponding to the image quality state by operating the image quality button, and A sound quality designation signal corresponding to a sound quality state is generated by operating the sound quality button, and the microcomputer receives the picture quality designation signal and generates the picture quality control signal in which a plurality of items related to picture quality are set in a preferable combination; The microcomputer inputs the sound quality designation signal and generates the sound quality control signal in which a plurality of items related to sound quality are set in a preferable combination, and the number of states of the preferable setting of the image quality and sound quality is such that the image quality and sound quality are almost continuous. By using a television receiver that can be used in a variety of ways, the operator can easily adjust the picture quality and sound quality to suit his or her preferences.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing the configuration of a television receiver according to an embodiment of the invention, and FIG. 2 is a waveform diagram showing an image quality control signal according to an embodiment of the invention. 4...AV input terminal, 6...audio amplification circuit, 9...video amplification circuit, 11...
Input operation section, 11a... Image quality button, 11b.
...Sound quality button, 12...Microcomputer, 1
3...Sound quality control conversion circuit, 14...Picture quality control conversion circuit, 15...Sound quality designation signal, 16
...Picture quality designation signal, 17...Sound quality control signal, 18...Picture quality control signal, 19...
- Sound quality item control signal, 2o... Image quality item control signal, 21... Radio wave receiving section.

Claims (1)

[Claims] In a television receiver that displays images and reproduces audio by receiving radio waves or inputting from an AV input terminal, the image quality is controlled by inputting an image quality item control signal that controls the status of a plurality of items related to image quality. an audio amplification circuit whose sound quality is controlled by inputting a sound quality item control signal that controls the states of a plurality of items related to sound quality; and an audio amplification circuit which generates the image item control signal from an image quality control signal output from a microcomputer. a sound quality control conversion circuit that generates the sound quality item control signal from the sound quality control signal output from the microcomputer, and an operator performs a selection operation of television reception or AV playback and a selection operation of image quality and sound quality. an input operation section, the operation section includes an image quality operation section and a sound quality operation section, and generates an image quality designation signal corresponding to the image quality state by operating the image quality button, and changes the sound quality state by operating the audio button. A corresponding sound quality designation signal is generated, and the microcomputer inputs the image quality designation signal and generates the image quality control signal in which a plurality of items related to image quality are set in combination, and the microcomputer inputs the sound quality designation signal. The television receiver generates the sound quality control signal set by combining a plurality of items related to sound quality, and the number of states of the preferred setting of the picture quality and sound quality is a large number in which the picture quality and sound quality are considered to change almost continuously. .