JP2000316105A - Television receiver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a television receiver equipped with a picture quality improving means which operates detail picture quality improvement for each scene of a video signal by digitizing a video signal for each field, and patterning this, and operating picture quality improvement by using picture quality setting data suitable for the pattern. SOLUTION: A video signal is patterned for each field by a patterning means 1, and an inside pattern suitable for the pattern is decided by a comparing means 2, and data specific to the inside pattern are set by a control part 3, and picture quality improvement is operated by a picture quality improving means 4. Thus, picture quality improvement can be operated for each field of the video signal.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a television receiver.

[0002]

2. Description of the Related Art Conventionally, television receivers are disclosed in
No. 84043 is known. FIG. 4 shows the structure of a conventional television receiver, which comprises a broadcast system discriminator, a microcomputer, and an image quality circuit.

[0003]

In such a television receiver, the image quality improvement effect of the image quality circuit can be changed for each broadcasting system according to the control of the microcomputer.
There is a problem that the image quality improvement effect of the image quality circuit is controlled by the microcomputer for each scene of the video signal in the same broadcast system, and the image quality improvement effect cannot be changed for each scene.

The present invention solves the above-mentioned conventional problems. A video signal is quantified for each field, the pattern is formed, and the image quality is improved with image quality setting data suitable for the pattern. It is an object of the present invention to provide a television receiver having image quality improvement means for performing fine image quality improvement every time.

[0005]

In order to achieve this object, a television receiver according to the present invention comprises a patterning means for quantifying a video signal for each field and patterning the quantified signal, and a method for converting the pattern into several internal signals. Compare with the pattern,
Comparing means for determining an internal pattern that matches the pattern, a control unit for transmitting data specific to the internal pattern to the image quality improving means, and image quality improving means for improving the image quality of the video signal for each field using the data. Things.
Thus, fine image quality setting can be performed by changing the image quality setting data for each scene of the video signal.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 of the present invention provides a patterning means for digitizing a video signal for each field and patterning it, and comparing the pattern with several internal patterns. A television receiver having a comparison unit that determines an internal pattern that matches a pattern, a control unit that transmits data specific to the internal pattern to the image quality improvement unit, and an image quality improvement unit that performs image quality improvement on a field-by-field basis with the data using the data. It has an effect that the image quality improvement effect can be changed for each field of the video signal.

According to a second aspect of the present invention, there is provided the television receiver according to the first aspect, wherein the patterning means is for brightness of a video signal, and the image quality improving means is for improving brightness. This has the effect that the effect of improving brightness can be changed for each field of the video signal.

According to a third aspect of the present invention, there is provided the television receiver according to the first aspect, wherein the patterning means is for brightness of a video signal, and the image quality improving means is for improving contrast. This has the effect that the effect of improving the contrast can be changed for each field of the video signal.

According to a fourth aspect of the present invention, there is provided the television receiver according to the first aspect, wherein the patterning means is for frequency characteristics of the video signal, and the image quality improving means is for improving sharpness. This has the effect that the effect of improving sharpness can be changed for each field of the video signal.

According to a fifth aspect of the present invention, there is provided the television receiver according to the first aspect, wherein the patterning means is for frequency characteristics of a video signal, and the image quality improving means is for improving S / N. , S for each field of the video signal
/ N can be improved.

(Embodiment 1) An embodiment of the invention described in claims 1, 2 and 3 of the present invention will be described below with reference to FIGS.

In FIG. 1, reference numeral 1 denotes a patterning means for digitizing a video signal for each field and patterning it as an input pattern. Reference numeral 2 denotes comparison means for comparing the input pattern with the n internal patterns of the television set to determine an internal pattern X that matches the input pattern. Reference numeral 3 denotes a control unit which transmits data X corresponding to the internal pattern X to the image quality improving unit as image quality control data. Reference numeral 4 denotes an image quality improving unit which converts a video signal corresponding to the input pattern into image quality control data X for each field. Improve.

FIGS. 2 (a), (b), (c), (d),
(E), (f), (g), and (h) are patterns digitized by brightness as a patterning means. The horizontal axis represents brightness, and the vertical axis represents the number of pixels of the brightness. This indicates how many pixels of a certain brightness exist in the video signal in one field. FIG. 2 (a), (b), (c)
2A is a characteristic example of the input pattern 1. FIG. 2A is a pattern obtained by digitizing a dark scene, and FIG. 2B is a pattern obtained by numerically expressing a slightly bright black scene. )
Is a digitized pattern of a bright scene with black floating.

In the case where the image quality improving means is to improve the brightness, when the video signal has the input pattern of FIG. 2A, the output pattern of the video signal whose image quality has been improved is as shown in FIG. 2D. Then, the image quality control data for increasing the brightness is transmitted from the control unit 2 to the image quality improvement circuit, and the image quality is improved so that blackening is not lost. When the video signal has the input pattern shown in FIGS. 2B and 2C, the control unit 2 controls the output pattern of the video signal whose image quality has been improved so that the output pattern shown in FIGS. 2E and 2F is obtained. The image quality control data for darkening the image is transmitted to the image quality improvement circuit, and the image quality is improved so that black does not float.

When the image quality improving means is to improve the contrast, when the video signal has the input pattern shown in FIG.
The control unit 2 transmits image quality control data for slightly lowering black and extending white so that the output pattern of the image signal whose image quality has been improved is as shown in FIG. Improve image quality so that When the video signal has the input pattern of FIG. 2C, the control unit 2 slightly lowers the black and suppresses the white peak so that the output pattern of the video signal with improved image quality becomes as shown in FIG. The image quality control data for increasing the brightness of the image is transmitted to the image quality improvement circuit, and the image quality is improved so that the contrast is not applied and the white area is not hit. According to such a configuration, the image quality improvement effect can be changed for each field of the video signal.

(Embodiment 2) Next, an embodiment of the invention described in claims 4 and 5 of the present invention will be described with reference to FIG. Note that the same components as those in the above-described embodiment are denoted by the same reference numerals, and description thereof is omitted.

In FIG. 3, reference numeral 1 denotes a patterning means, which is composed of m BPFs (bandpass filters), an integrating circuit and an input pattern determining circuit. As a pattern.

When the image quality improving means is to improve sharpness, the frequency characteristic of the video signal for each field is detected, and control data of sharpness is transferred from the control unit 2 to the image quality improving circuit according to the frequency characteristic. Improve sharpness.

If the image quality improvement means is to improve the S / N, the frequency characteristic of noise in the vertical flyback period is detected for each field, and control data of sharpness for reducing the frequency component is sent from the control unit 2. The signal is transferred to the image quality improvement circuit to improve S / N. According to such a configuration, the image quality improvement effect can be changed for each field of the video signal.

[0020]

As described above, according to the television receiver of the present invention, the video signal is quantified for each field, and it is patterned, and the image quality is improved by the image quality setting data suitable for the pattern. In addition, fine image quality improvement can be performed for each scene of a video signal.

[Brief description of the drawings]

FIG. 1 is a schematic block diagram according to Embodiment 1 of the present invention.

FIG. 2 is a pattern diagram showing brightness in one field according to the first embodiment of the present invention.

FIG. 3 is a schematic block diagram according to a second embodiment of the present invention.

FIG. 4 is a conventional schematic block diagram.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Patterning means 2 Comparison means 3 Control part 4 Picture quality improvement means 5 Broadcast system discrimination part 6 Picture quality circuit 7 Microcomputer

Claims (5)

[Claims] 1. A patterning means for digitizing a video signal for each field and patterning it, a comparing means for comparing the pattern with some internal patterns and determining an internal pattern matching the pattern, A television receiver comprising: a control unit that transmits data unique to an internal pattern to an image quality improvement unit; and an image quality improvement unit that improves image quality of a video signal for each field using the data. 2. The television receiver according to claim 1, wherein said patterning means is for brightness of a video signal, and said image quality improving means is for improving brightness. 3. The television receiver according to claim 1, wherein said patterning means is for brightness of a video signal, and said image quality improving means is improvement of contrast. 4. The television receiver according to claim 1, wherein the patterning means is for frequency characteristics of the video signal, and the image quality improving means is for improving sharpness. 5. The television receiver according to claim 1, wherein the patterning means is for a frequency characteristic of a video signal, and the image quality improving means is for improving S / N.