KR101760420B1 - Apparatus and method for processing sharpness of video signal, Broadcasting Signal Receiver - Google Patents

Abstract

An apparatus and method for processing a sharpness of a video signal according to the present invention is a method and apparatus for processing a sharpness of a video signal according to a method of processing a sharpness of a video signal according to a macro block size of a first resolution image (e.g., an HD image) And determines whether the received first resolution image is an original first resolution image or an upscaled image from a second resolution image (e.g., SD image) to a first resolution image, By applying the sharpness, a high-quality image can be displayed on the screen. In addition, it is possible to efficiently prevent image distortion such as a motion drag or a peaking width from becoming thick do.

Description

[0001] The present invention relates to a sharpness processing apparatus and method for a video signal, a broadcast signal receiver,

The present invention relates to an apparatus, a method and a broadcast signal receiver for processing a sharpness of a video signal.

In general, a high definition (HD) image is a high definition image that reproduces 60 frames per second with a number of pixels of 1920 x 1080 or more, and is, for example, at least twice as large as a Standard Definition (SD) High-quality image.

1 schematically shows a configuration of a transmitting side (TX) and a receiving receiving side (RX) for transmitting video signals through a general broadcasting channel. For example, the transmitter 100 Includes an A / D converter 10, a video encoder 11, a multiplexer 12, a channel encoder 13, and the like.

A receiver 200 such as a television receiving the broadcast includes a channel decoder 20, a demux 210, a video decoder 22, a D / A converter 23, For example, in the mux 12 of the transmitter 100, audio data, and various types of broadcast additional information, as well as video data of a moving picture encoded in the MPEG-2 format by the video encoder 11, And multiplexed into a broadcast data stream.

The demultiplexer 21 of the receiver 200 demultiplexes the broadcast data stream input through the channel decoder 20 and demultiplexes the video data, And the video decoder 22 of the receiver decodes the video data, and the D / A converter 23 converts the decoded video data into an analog video signal, .

2, when the SD video having the number of pixels of 720 x 480 is input, the video encoder 11 of the transmitter 100 performs the up-scaling of x2.66 / x2.25 Up Scaling operation is performed to encode an HD image having a pixel number of 1920 x 1080. The up-scaling operation may be performed by an interpolation method or a doubling method.

The video encoder 11 performs coding and signal processing in units of macroblocks of 8 x 8 pixels through a discrete cosine transform (DCT) during the MPEG encoding process. In the case of encoding the original HD image, the macro block is outputted in the 8 x 8 format. However, for example, as shown in FIG. 3, when the SD image is encoded into the HD image, since the upscaling operation is performed, The macroblock of the upscaled HD image in the image becomes larger than 8 x 8.

On the other hand, when the receiver 200 receiving the original HD image, for example, a television (TV), performs signal processing by applying sharpness set beforehand to an HD image, a high-definition HD image is displayed However, if signal processing is performed by, for example, receiving the upscaled HD image in the SD image and applying the sharpness preset in advance to the HD image, for example, as shown in FIG. 4, There is a problem that a motion drag occurs in the image and an image distortion phenomenon in which a peaking width is increased is generated.

The first resolution image (e.g., HD image) received from a broadcast channel or an external device is a first resolution image or a second resolution image (e.g., an SD image) The present invention is to provide an apparatus and method for processing a sharpness of a video signal so as to prevent occurrence of an image distortion phenomenon by discriminating whether the image is an up-scaled image and applying a suitable sharpness thereto.

An apparatus for processing sharpness of a video signal according to the present invention includes: an image processing unit for receiving and processing a first resolution image; A detecting unit for detecting a macroblock size of the first resolution image; A controller for determining whether the first resolution image is an original first resolution image or an upscaled first resolution image from a second resolution image based on the macro block size; And a second resolution sharpness applying unit that applies a first resolution sharpness if the first resolution image is an original first resolution image and an upscaled image that is upscaled to a first resolution image from the second resolution image, And a sharpness processing unit,

The first resolution image may be an HD image and the second resolution image may be an SD image.

If the detected macro-block size does not exceed a preset reference size, the control unit determines the original first resolution image. If the detected macro-block size exceeds the reference size, And the image is upscaled to the first resolution image.

If the first resolution image is an original first resolution image, the sharpness processing unit may apply the first resolution sharpness set in accordance with the HD image, and perform the upscaling A second resolution sharpness set in accordance with a SD image is applied,

According to another aspect of the present invention, there is provided a sharpness processing apparatus for a video signal, comprising: an image processing unit for receiving and processing a first resolution image; A detection unit for detecting a macroblock edge of the first resolution image; A controller for determining whether the first resolution image is an original first resolution image or an upscaled first resolution image from the second resolution image based on the macro block edge; And a second resolution sharpness applying unit that applies a first resolution sharpness if the first resolution image is an original first resolution image and an upscaled image that is upscaled to a first resolution image from the second resolution image, And a sharpness processing unit,

The first resolution image may be an HD image and the second resolution image may be an SD image.

In addition, if the vertical / horizontal line of the detected macro block edge is a straight line, the control unit determines the original first resolution image,

And if it is not the straight line, it is determined that the image is upscaled from the second resolution image to the first resolution image,

The sharpness processing unit may be configured to apply the first resolution sharpness set in accordance with the HD image if the image of the first resolution is the original first resolution image, And a second resolution sharpness set according to a SD image is applied if the image is a scaled image,

According to another aspect of the present invention, there is provided a method of processing a sharpness image signal, the method comprising: receiving and processing a first resolution image, wherein the first resolution image is an original first resolution image or a second resolution image, Determining whether the captured image is a captured image; And if it is determined that the original resolution is the original first resolution image, the first resolution sharpness is applied to process the signal and if the image is upscaled to the first resolution image in the second resolution image, the second resolution sharpness is applied to perform signal processing And a second step,

The first resolution image may be an HD image and the second resolution image may be an SD image.

The determining step may include receiving and processing a first resolution image, detecting a macro block size of the first resolution image, and if the first resolution image does not exceed a preset reference size, Resolution image, and if it exceeds the reference size, it is determined that the image is upscaled from the second resolution image to the first resolution image,

The determining step may include receiving and processing a first resolution image, detecting a vertical / horizontal line of a macro block edge of the first resolution image, and if the straight line is a straight line, And if it is not the straight line, it is determined that the image is upscaled to the first resolution image from the second resolution image,

The signal processing may further include applying first resolution sharpness set in accordance with the HD image to the first resolution image and upscaling the first resolution image to the first resolution image if the discrimination result indicates the original first resolution image, The second resolution sharpness set in accordance with the SD image is applied to perform the signal processing.

The broadcasting signal receiver according to the present invention includes a driving unit for signal processing received image data and a display unit for displaying an image, and when the received image data is image data produced with a first resolution, Processing the image data according to the second resolution when the image data is image data upscaled to the first resolution from the second resolution lower than the first resolution, .

If the macro block size of the received video data does not exceed a preset reference size, the driving unit processes the video data according to the first resolution received, and outputs the macro block size of the received video data The driving unit may process the image data according to the second resolution.

If the vertical / horizontal line of the macro block edge of the image data is straight, the driving unit processes the image data according to the received first resolution, The driving unit may process the image data according to the second resolution.

An apparatus and method for processing a sharpness of a video signal and a broadcast signal receiver according to the present invention can be applied to a sharpness processing apparatus and method for processing a sharpness of a video signal according to a macro block size of a first resolution image (e.g., an HD image) A macro block edge is detected and it is determined whether the received first resolution image is an original first resolution image or a second resolution image (e.g., an SD image) upscaled to a first resolution image A high-quality image can be displayed on the screen, and furthermore, an image distortion phenomenon such as a motion drag or a peaking width is seen to be thick, .

1 schematically shows a configuration of a general broadcast transmitter and a broadcast receiver;
2 illustrates a video encoder for upscaling a conventional SD image to an HD image;
3 is a diagram of an embodiment in which a typical SD image is upscaled;
4 is a view showing an upscaled HD image screen in which a general image distortion phenomenon occurs;
5 is a diagram showing a configuration of an embodiment of a television to which the present invention is applied;
6 is a flowchart illustrating an operation of a first embodiment of a method of processing a sharpness of a video signal according to the present invention;
7 is a flowchart illustrating an operation of a second embodiment of a method of processing a sharpness of a video signal according to the present invention;
8 is a diagram illustrating an embodiment for detecting a macroblock size and an edge according to the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of an apparatus and method for processing sharpness of a video signal and a broadcast signal receiver according to the present invention will be described in detail with reference to the accompanying drawings.

While the invention is susceptible to various modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings and will herein be described in detail. It is to be understood that the present invention is not intended to be limited to the specific embodiments but includes all changes, equivalents, and alternatives falling within the spirit and scope of the present invention.

In describing the present invention, the terms first, second, etc. may be used to describe various components, but the components may not be limited by the terms. The terms may only be used for the purpose of distinguishing one element from another. For example, without departing from the scope of the present invention, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component.

The term " and / or " may include any combination of a plurality of related listed items or any of a plurality of related listed items.

When an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, but other elements may be present in between Can be understood. On the other hand, when it is mentioned that an element is "directly connected" or "directly connected" to another element, it can be understood that no other element exists in between.

The terminology used in this application is used only to describe a specific embodiment and is not intended to limit the invention. The singular expressions may include plural expressions unless the context clearly dictates otherwise.

In the present application, the terms "comprises", "having", and the like are used interchangeably to designate one or more of the features, numbers, steps, operations, elements, components, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, parts, or combinations thereof.

Unless otherwise defined, all terms used herein, including technical or scientific terms, may have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries can be interpreted as having a meaning consistent with the meaning in the context of the relevant art and are, unless expressly defined in the present application, interpreted in an ideal or overly formal sense .

In addition, the following embodiments are provided to explain more fully to the average person skilled in the art. The shapes and sizes of the elements in the drawings and the like can be exaggerated for clarity.

An apparatus and method for processing a sharpness of a video signal according to the present invention includes a television (TV) for signal processing a first resolution image (e.g., an HD image) received from a broadcast channel or an external device, But also to various other A / V devices and the like.

5, the television to which the present invention is applied includes a demodulation unit 30, an MPEG decoder unit 31, an input color space conversion unit 32, a deinterlacing unit 33, a detection unit 34 A control unit 35, a first resolution sharpness unit 36, a second resolution sharpness unit 37, an output color space conversion unit 38, a display unit 39, and the like. Here, the demodulation unit 30, the MPEG decoder unit 31, the input color space conversion unit 32, the deinterlacing unit 33, the detection unit 34, the control unit 35, the first resolution sharpness unit 36, The second resolution sharpness unit 37 and the output color space conversion unit 38 may be referred to as a driver for processing received data, for example, image data. In this case, the display unit 39 can display the image data processed by the driving unit.

Here, the driving unit processes the image data according to the first resolution when the received image data is image data manufactured with the first resolution, and the image data is up-scaled from the second resolution lower than the first resolution to the first resolution In case of image data, the image data can be processed according to the second resolution.

For example, a digital broadcasting signal (DBS) received through a broadcasting channel is demodulated by the demodulation unit 30, and then the original audio and / And is MPEG decoded into video data.

Then, the decoded video data is converted by the input color space conversion (CSC) 32 into data of Y, Cb and Cr components in R, G, and B components or Y, Pb, and Pr components And then subjected to a normal signal processing process through the de-interlace unit 33.

Meanwhile, the detection unit 34 detects a macroblock for a first resolution image, for example, an HD image, output from the deinterlacer 33. In the first implementation of the present invention, For example, the detection unit 34 detects the size (size) of a macroblock for the HD image.

In the second embodiment of the present invention, the detection unit 34 detects a vertical / horizontal line of an edge of a macroblock with respect to the HD image. In the control unit 35, for example, If the macroblock size exceeds a predetermined reference size (e.g., 8 x 8), or if the vertical / horizontal line of the macro block edge is not a straight line, the HD image is not the original HD image but the second resolution For example, an image that is up-scaled from an SD image to an HD image.

By disabling the first resolution (e.g., HD) sharpness unit 36 and enabling the second resolution (e.g., SD) sharpness unit 37, So that a suitable sharpening process operation is performed.

On the other hand, if the macro block size does not exceed a preset reference size (e.g., 8 x 8) or if the vertical / horizontal line of the macro block edge is straight, It is determined that the HD image is the original HD image.

By making the second resolution (e.g., SD) sharpness unit 37 disable and enabling the first resolution (e.g., HD) sharpness unit 36, the original HD So that the sharpness processing operation suitable for the image is performed.

On the other hand, in the output color space converter 38, the image signal obtained by selectively applying either the first resolution sharpness or the second resolution sharpness is subjected to R, G, B component video signal, and then displays the video signal on the display unit 39.

Accordingly, when the original HD image is received, the first resolution sharpness set according to the HD image is applied to display the high-quality image on the screen. When the upscaled image from the SD image to the HD image is received, It is possible to display a screen free of image distortion phenomenon such as a motion drag or a peaking width that is thicker by applying a second resolution sharpness set suitably to .

In other words, in the broadcast signal receiver according to the present invention, when the received image data is image data produced with the first resolution, the image signal is processed according to the first resolution, and when the image data is the second resolution lower than the first resolution If the image data is upscaled to the first resolution, the image data can be processed according to the second resolution.

For example, the demodulator 30, the MPEG decoder 31, the input color space converter 32, the deinterface unit 33, and the output color space converter 38 may be connected to a well- The detailed description of the technology is omitted.

6 is a flowchart illustrating an operation of a first embodiment of a method of processing a sharpness of a video signal according to the present invention. When a digital broadcasting signal is received through a desired one of broadcasting channels (S10) , The demodulation unit 30 and the MPEG decoder unit 31 perform a typical demodulation and MPEG decoding operation (S11).

The input color space conversion unit 32 converts the video signals of the R, G, and B components or Y, Pb, and Pr components output from the MPEG decoder unit 31 into Y, Cr, and Cb And performs a series of color space conversion operations of performing signal processing on the video signal of the component (S12).

The de-interlacing unit 33 de-interlaces the Y, Cr, and Cb image signals to obtain a first resolution sharpness unit 36 and a first resolution And outputs it to the sharpness unit 37.

The detection unit 34 detects the size of a macro block of a video signal output from the deinterlace unit 33 in step S14. (S15) whether the size of the macroblock is larger than a preset reference size, for example, 8 x 8 of the macroblock corresponding to the original HD video.

According to the result of the comparison, if the video signal output from the de-interlacing unit 33 is a first resolution video, for example, an original HD video or a second resolution video, for example, an HD video Scaled image. If the macro block size exceeds the reference size 8 x 8, it is determined that the image is upscaled from the SD image to the HD image, and then the first resolution (for example, HD ) And the second resolution (e.g., SD) sharpness unit 37 are enabled.

Accordingly, the image signal output from the deinterlacer 33, that is, the second resolution image, undergoes an SD sharpness process set according to the SD image (S16).

On the other hand, if the macro-block size does not exceed the reference size 8 x 8, the second resolution (e.g., SD) sharpness unit 37 is disabled after the determination of the original HD image, And the resolution (e.g., HD) sharpness portion 36 is enabled.

Accordingly, the image signal output from the de-interlacing unit 33, that is, the first resolution image, is subjected to the HD sharpness process according to the HD image (S17). Thereafter, the output color space conversion unit 38 And converted into video signals of R, G, and B components (S18).

Since the image signals of the R, G, and B components are displayed on the screen through the display unit 39 (S19), the original HD image is displayed on the screen as a high-quality image through the HD sharpness process, An image upscaled to an HD image is displayed on the screen as an image without image distortion phenomenon such as a motion drag or a peaking width is thickened through an SD sharpness process.

That is, in the broadcast signal receiver according to the present invention, when the macro block size of the received image data does not exceed the predetermined reference size, the image data can be processed according to the received first resolution. On the other hand, when the macroblock size of the received video data exceeds the predetermined reference size, the video data can be processed according to the second resolution.

7 is a flowchart illustrating an operation of a second embodiment of a method of processing a sharpness of a video signal according to the present invention. As described above, when a digital broadcasting signal is received through a desired one of the broadcasting channels (S30 , The demodulation unit 30 and the MPEG decoder unit 31 perform a normal demodulation and MPEG decoding operation (S31).

The input color space conversion unit 32 converts the video signals of the R, G, and B components or Y, Pb, and Pr components output from the MPEG decoder unit 31 into Y, Cr, and Cb And performs a series of color space conversion operations of performing signal processing on the image signal of the component (S32).

The deinterlacing unit 33 de-interlaces the Y, Cr, and Cb image signals with the first resolution sharpness unit 36 and the first resolution And outputs it to the sharpness unit 37.

The detection unit 34 detects a vertical / horizontal line of a macro block edge of a video signal output from the deinterlace unit 33 in step S34. In step S34, And it is confirmed whether the vertical / horizontal line of the detected macro block edge is a straight line (S35).

According to the result of the check, the video signal output from the deinterlacer 33 is converted into a first resolution video, for example, an original HD video or a second resolution video, for example, an HD video If the vertical / horizontal line of the macro-block edge is not a straight line, it is determined that the image is an image scaled by the up HD image in the SD image, and then the first resolution (e.g., HD) Disables the sharpness portion 36, and enables the second resolution (e.g., SD) sharpness portion 37.

Accordingly, the image signal output from the deinterlacer 33, that is, the second resolution image, is subjected to the SD sharpness process set in accordance with the SD image (S36).

On the other hand, if the vertical / horizontal line of the macro-block edge is a straight line, the second resolution (e.g., SD) sharpness unit 37 is disabled and the first resolution : HD) sharpness portion 36 is enabled.

Accordingly, the image signal output from the de-interlacing unit 33, that is, the first resolution image, undergoes an HD sharpness process that is set according to the HD image (S37) And converted into video signals of R, G, and B components (S38).

Since the image signals of the R, G, and B components are displayed on the screen through the display unit 39 (S39), the original HD image is displayed on the screen as a high-quality image through the HD sharpness process, The upscaled HD image is displayed on the screen as an image without image distortion phenomenon such as a motion drag or a peaking width is thickened through the SD sharpness process.

That is, according to the present invention, as shown in Fig. 8, a macroblock of a video signal is detected, and the size of the macroblock exceeds a reference size (e.g., 8 x 8) / If the horizontal line is not a straight line, it is possible to effectively prevent the occurrence of distortion in the image screen by performing the SD sharpness processing operation after discriminating the HD image upscaled in the SD image.

That is, in the broadcast signal receiver according to the present invention, when the vertical / horizontal line of the macro block edge of the image data is straight, it is possible to process the image data according to the received first resolution. On the other hand, when the vertical / horizontal line of the macro block edge of the video data is not a straight line, the video data can be processed according to the second resolution.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention as defined in the appended claims. , Alteration, substitution, addition, or the like.

30: demodulation unit 31: MPE decoder unit
32: input color space conversion unit 33: deinterlace unit
34: detecting section 35:
36: first resolution sharpness unit 37: second resolution sharpness unit
38: output color space conversion section 39: display section
300: Television

Claims (16)

An image processor for receiving and processing a first resolution image;
A detecting unit for detecting a macroblock size of the first resolution image;
If the detected macroblock size does not exceed a preset reference size, the image is judged as an original first resolution image. If the detected size exceeds the reference size, A controller for discriminating the scaled image and determining whether the first resolution image is an original first resolution image or an upscaled image from the second resolution image to a first resolution image; And
If the first resolution image is an original first resolution image and the first resolution sharpness is applied and if the second resolution image is an upscaled image to a first resolution image, And a processing unit for processing the sharpness of the video signal. The method according to claim 1,
Wherein the first resolution image is an HD image and the second resolution image is an SD image. delete The method according to claim 1,
Wherein the sharpness processing unit applies a first resolution sharpness set in accordance with an HD image if the first resolution image is an original first resolution image and applies the first resolution sharpness to the first resolution image, , A second resolution sharpness set in accordance with a SD image is applied. An image processor for receiving and processing a first resolution image;
A detection unit for detecting a macroblock edge of the first resolution image;
If the vertical / horizontal line of the detected macro block edge is a straight line, it is determined to be the original first resolution image. If the vertical line is not the straight line, the second resolution image is discriminated as the upscaled image to the first resolution image A controller for determining whether the first resolution image is an original first resolution image or an upscaled image from a second resolution image to a first resolution image; And
If the first resolution image is an original first resolution image and the first resolution sharpness is applied and if the second resolution image is an upscaled image to a first resolution image, And a processing unit for processing the sharpness of the video signal. 6. The method of claim 5,
Wherein the first resolution image is an HD image and the second resolution image is an SD image. delete 6. The method of claim 5,
Wherein the sharpness processing unit applies a first resolution sharpness set in accordance with an HD image if the image of the first resolution is an original first resolution image and applies the first resolution sharpness that is up- And the second resolution sharpness set in accordance with the SD image is applied if the image is an image. delete delete delete delete delete A driving unit for signal-processing received video data; And
A display unit for displaying an image;
Lt; / RTI >
Wherein the driving unit determines that the received video data is video data of a first resolution when the macro block size of the received video data does not exceed a preset reference size, Processing the data,
When the macro block size of the received image data exceeds a preset reference size, the image data is determined to be image data upscaled to the first resolution from the second resolution lower than the first resolution, And processing the image data according to a resolution. delete A driving unit for signal-processing received video data; And
A display unit for displaying an image;
Lt; / RTI >
Wherein the driving unit determines that the received video data is video data of a first resolution when a vertical / horizontal line of a macro block edge of the received video data is straight, Processing the video data according to the video signal,
When the vertical / horizontal line of the macro block edge of the received image data is not a straight line, it is determined that the image data is image data upscaled to the first resolution from the second resolution lower than the first resolution, And a signal processor for signal processing the image data according to a second resolution.

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