KR20100064648A - Method for switching image resolution in digital broadcasting receiver - Google Patents

Method for switching image resolution in digital broadcasting receiver Download PDF

Info

Publication number
KR20100064648A
KR20100064648A KR1020080123173A KR20080123173A KR20100064648A KR 20100064648 A KR20100064648 A KR 20100064648A KR 1020080123173 A KR1020080123173 A KR 1020080123173A KR 20080123173 A KR20080123173 A KR 20080123173A KR 20100064648 A KR20100064648 A KR 20100064648A
Authority
KR
South Korea
Prior art keywords
resolution
broadcast signal
output
receiver
digital
Prior art date
Application number
KR1020080123173A
Other languages
Korean (ko)
Inventor
김윤현
Original Assignee
엘지전자 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 엘지전자 주식회사 filed Critical 엘지전자 주식회사
Priority to KR1020080123173A priority Critical patent/KR20100064648A/en
Publication of KR20100064648A publication Critical patent/KR20100064648A/en

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/44—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs
    • H04N21/44008—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs involving operations for analysing video streams, e.g. detecting features or characteristics in the video stream
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/01—Conversion of standards, e.g. involving analogue television standards or digital television standards processed at pixel level
    • H04N7/0117—Conversion of standards, e.g. involving analogue television standards or digital television standards processed at pixel level involving conversion of the spatial resolution of the incoming video signal

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Computer Graphics (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)

Abstract

The present invention relates to a resolution switching method in a digital broadcast receiver. More particularly, in a digital broadcast receiver such as a set-top box, the resolution of the broadcast signal is determined from the transport stream of the digital broadcast signal, and the resolution of the broadcast signal is determined. And compare the output resolutions set in the set with each other. If the resolutions do not coincide with each other, the output resolutions set in the set are switched to the resolutions of the broadcast signal. Characterized in that.

Accordingly, the present invention automatically switches the output resolution set in the digital broadcast receiver itself according to the resolution of the received digital broadcast signal, so that the resolution of the received broadcast signal is converted to another resolution set in the receiver, thereby preventing image quality deterioration. You can do it.

Description

Method for switching image resolution in digital broadcasting receiver

The present invention relates to a resolution switching method in a digital broadcasting receiver. For example, in a digital broadcasting receiver such as a set-top box (STB), by automatically switching the output resolution set in the receiver to match the resolution of a received digital broadcasting signal. The present invention relates to a resolution switching method in a digital broadcast receiver which prevents image quality deterioration by converting a resolution of a received broadcast signal into another resolution set in the receiver.

In general, a digital broadcast receiver such as a set-top box (STB) capable of receiving digital satellite broadcasting or digital cable broadcasting and digital terrestrial broadcasting is widely used.

For example, when a digital broadcast receiver such as a set-top box (STB) or a recorder is connected to a digital television (DTV) to receive a digital broadcast signal, the user may output 720x480i, 720x480p output resolution of the digital broadcast receiver. (SD), 1280x720p, 1920x1080i (HD), 1920x1080p (Full HD), and change it if necessary.

Recently, various broadcasting contents are produced and transmitted by a high definition digital broadcast signal of a high definition (HD) method, which is more improved in image quality and sound than a conventional standard definition (SD) method.

On the other hand, when a digital broadcast signal of 1080i resolution is transmitted from a broadcasting station while the user sets the output resolution of the digital broadcast receiver to 720p or 1080p, the digital broadcast receiver presets the resolution 1080i of the received broadcast signal. Signal processing is performed to convert the set output resolution (720p or 1080p).

For example, when the received broadcast signal is an interlace scanning method of 1080i resolution, a de-interlace signal processing process of converting the progressive resolution to 720p or 1080p output resolution set in the digital broadcasting receiver is performed. Will go through. At this time, there is a problem that image quality deterioration occurs in the broadcast signal output to the screen.

Accordingly, the present invention has been created to solve the above problems, for example, in a digital broadcast receiver such as a set-top box, to determine the resolution of the broadcast signal from the transport stream of the digital broadcast signal received, the broadcast signal It is an object of the present invention to provide a resolution switching method in a digital broadcasting receiver that automatically compares the resolution of the receiver and the output resolution set in the receiver itself so that the output resolution of the receiver matches the resolution of the received broadcast signal.

The resolution switching method in the digital broadcast receiver according to the present invention for achieving the above object, the step of determining the resolution of the broadcast signal from the transport stream of the digital broadcast signal, the resolution of the broadcast signal and the output resolution set in the set Compared to, if the resolution does not match each other, switching the output resolution set in the set to the resolution of the broadcast signal, and if the resolution matches each other, and outputting the broadcast signal to the screen.

The invention is characterized in that the updated output resolution is updated.

The present invention is characterized in that the output resolution is any one of 480i, 480p, 720p, 1080i, 1080p.

As described above, in the resolution switching method of the digital broadcast receiver according to the present invention, the resolution of the broadcast signal is determined from the transport stream of the received digital broadcast signal, and the output resolution set in the receiver itself is the resolution of the received broadcast signal. By automatically switching to match with, the resolution of the received broadcast signal is converted to another resolution set in the receiver, thereby preventing the deterioration of image quality.

Hereinafter, a preferred embodiment of a resolution switching method in a digital broadcast receiver according to the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram schematically showing an internal configuration of a digital broadcast receiver according to the present invention, and FIG. 2 is a block diagram schematically showing a configuration of a switching unit in a digital broadcast receiver according to the present invention.

First, various types of digital broadcast receivers, such as a set top box (STB) to which the resolution switching method according to the present invention is applied, are shown in FIG. 1, for example, a tuner 10, a demux 11, and an audio buffer. 12, a video buffer 13, a data buffer 14, an MPEG decoder 15, a microcomputer 16, an OSD generating unit 17, a memory 18, and the like.

In the microcomputer 16, when the user selects and designates any one broadcast channel using a remote controller or the like, the tuner 10 and the demux 11 are operated to control and tune and broadcast the corresponding broadcast channel. The demux 11 separates and outputs a transport stream of a broadcast signal provided through the broadcast channel into audio, video, and data.

The MPEG decoder 15 decodes the transport stream of the broadcast signal output from the demux 11 into original audio and video, and the OSD generating unit 17 decodes the microcomputer 16. According to the operation control, various guide message images or menu images are generated and output through the screen of an external connection device such as a digital television (DTV).

The microcomputer 16 detects the resolution information of the broadcast signal from the transport stream of the channel-selected broadcast signal, and the resolution of the received broadcast signal, for example, 720x480p, 720x480i (SD), 1280x720p, 1920x1080i ( HD), 1920x1080p (Full HD), and the like.

In addition, the microcomputer 16 reads output resolution information set in the receiver itself, for example, 720x480p, 720x480i (SD), 1280x720p, 1920x1080i (HD), 1920x1080p (Full HD), and the like. Compare with the resolution of the broadcast signal.

In this case, when the resolution of the broadcast signal and the output resolution set in the receiver match each other, the microcomputer 16 decodes the transport stream of the broadcast signal through the MPEG decoder 15 into original audio and video. Output to the screen of an external connection device such as a digital television (DTV).

On the other hand, when the resolution of the broadcast signal and the output resolution set in the receiver does not match each other, the microcomputer 16, as shown in Figure 2, the switching control signal for selecting the output resolution that matches the resolution of the broadcast signal Is applied to the switching unit 150 of the MPEG decoder 15.

In the switching unit 150 of the MPEG decoder 15, the full HD module 151 and the HD module 152 match the resolution of the broadcasting signal to the output resolution set in the set according to the switching control signal of the microcomputer 16. Switching is switched to the SD module 153. At this time, the microcomputer 16 updates and stores the switched output resolution in an output resolution table (not shown) of the memory 18.

Accordingly, a user can watch a high resolution broadcast signal without deterioration in image quality. This will be described in detail below.

FIG. 3 is a flowchart illustrating a resolution switching method in the digital broadcasting receiver according to the present invention. For example, as shown in FIG. 3, in the microcomputer 16, a user uses a remote controller or the like. In case of selecting and designating any one broadcast channel, the tuner 10 and the demux 11 are operated to tune and demodulate the corresponding broadcast channel, and transmit a transport stream of a broadcast signal provided through the broadcast channel ( The resolution of the broadcast signal is determined from the transport stream (S10).

The microcomputer 16 reads output resolution information set in a digital broadcast receiver (hereinafter, referred to as a set) from the memory 18 (S20) and compares whether or not it matches the resolution of the broadcast signal (S30).

When the resolution of the broadcast signal and the output resolution set in the set coincide with each other, the received broadcast signal is output and displayed on the screen of an external connection device such as a digital television (DTV) (S40).

In addition, when the resolution of the broadcast signal and the output resolution set in the set do not match each other, the microcomputer 16 automatically switches the output resolution set in the set to match the resolution of the broadcast signal, so that the MPEG decoder ( 15) the transport stream of the broadcast signal is decoded into original audio and video and output to the screen of an external connection device such as a digital television (DTV) (S50).

For example, when the resolution of the broadcast signal is 1080i and the output resolution set in the set is 720p or 1080p, the microcomputer 16 selects a switching control signal for selecting an output resolution that matches the resolution of the broadcast signal. Applied to the switching unit 150 of the decoder 15, and the switching unit 150 of the MPEG decoder 15 matches the output resolution set in the set according to the switching control signal of the microcomputer 16 with the resolution of the broadcast signal. Switch switching to match.

Here, when the resolution of the received broadcast signal is 1080p, the output resolution set in the set is switched to the Full HD module 151, which is 1080p, and when the resolution of the received broadcast signal is 1080i or 720p, the output resolution set in the set Are switched to the HD module 152 by dividing each into 1080i or 720p, and when the resolution of the received broadcast signal is 480i or 480p, the output resolution set in the set is divided into the SD module 153 by dividing 480i or 480p, respectively. By switching, the received broadcast signal is output and displayed on the screen of an external connection device such as digital television (DTV).

Therefore, the resolution switching method in the digital broadcast receiver according to the present invention automatically switches the output resolution set in the digital broadcast receiver to match the resolution of the received broadcast signal, thereby reducing the resolution of the received broadcast signal and the output resolution set in the set. By preventing the deterioration of image quality caused by the difference can provide a clearer image quality.

As mentioned above, preferred embodiments of the present invention described above are disclosed for the purpose of illustration, and those skilled in the art can improve other various embodiments within the spirit and technical scope of the present invention disclosed in the appended claims below. Changes, substitutions or additions will be possible.

1 is a block diagram schematically illustrating an internal configuration of a digital broadcast receiver according to the present invention.

2 is a block diagram schematically illustrating a configuration of a switching unit in a digital broadcast receiver according to the present invention.

3 is a flowchart illustrating a resolution switching method in a digital broadcast receiver according to the present invention.

Explanation of symbols on the main parts of the drawings

       10: Tuner 11: Demux

       12: audio buffer 13: video buffer

       14: data buffer 15: MPEG decoder

       16: microcomputer 17: OSD generation unit

       18: memory 150: switching unit

       151: Full HD module 152: HD module

       153: SD module

Claims (3)

Determining the resolution of the broadcast signal from the transport stream of the digital broadcast signal; Comparing the resolution of the broadcast signal with the output resolution set in the set and switching the output resolution set in the set to the resolution of the broadcast signal when the resolutions do not match each other; And And outputting the broadcast signal to a screen when the resolutions match each other. The method of claim 1, The method of claim 1, wherein the switched output resolution is updated. The method according to claim 1 or 2, And the output resolution is any one of 480i, 480p, 720p, 1080i, and 1080p.
KR1020080123173A 2008-12-05 2008-12-05 Method for switching image resolution in digital broadcasting receiver KR20100064648A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020080123173A KR20100064648A (en) 2008-12-05 2008-12-05 Method for switching image resolution in digital broadcasting receiver

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020080123173A KR20100064648A (en) 2008-12-05 2008-12-05 Method for switching image resolution in digital broadcasting receiver

Publications (1)

Publication Number Publication Date
KR20100064648A true KR20100064648A (en) 2010-06-15

Family

ID=42364230

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020080123173A KR20100064648A (en) 2008-12-05 2008-12-05 Method for switching image resolution in digital broadcasting receiver

Country Status (1)

Country Link
KR (1) KR20100064648A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013048002A1 (en) * 2011-09-29 2013-04-04 주식회사 아이덴코아 Transmission scheme and image quality adaptive security camera and dvr system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013048002A1 (en) * 2011-09-29 2013-04-04 주식회사 아이덴코아 Transmission scheme and image quality adaptive security camera and dvr system
KR101279855B1 (en) * 2011-09-29 2013-06-28 주식회사 아이덴코아 Transmission and video quality adaptive security camera and dvr system
US9628750B2 (en) 2011-09-29 2017-04-18 Pixelplus Co., Ltd. Transmission scheme and image quality adaptive security camera and DVR system

Similar Documents

Publication Publication Date Title
US9088686B2 (en) Video signal switching
US8750386B2 (en) Content reproduction device
KR20040107267A (en) Apparatus and method for zoom transfer of television system
US7545441B2 (en) Digital broadcast receiver
KR100522605B1 (en) Set top box capable of transmitting wireless signal
JP2001285748A (en) Method for synchronizing hdtv format change with on- screen display
US20100091186A1 (en) Display System and Receiving Apparatus
KR20040023011A (en) Digital TV system for supporting of film mode and method for the same
KR20100064648A (en) Method for switching image resolution in digital broadcasting receiver
US7720143B2 (en) Signal processing apparatus
JP3789716B2 (en) Television broadcast receiver
KR20070016411A (en) Digital television operated by watching pattern and control method thereof
KR100309878B1 (en) Input format converter of digital tv
JPH11168679A (en) Digital broadcasting receiver
KR100211210B1 (en) Multimedia television receiver combined monitor of personal computer
EP2040468A2 (en) Image processing apparatus and method for transmitting high-resolution graphic screen
JP2011223128A (en) Broadcast receiver
KR20100068690A (en) Apparatus and method for compensating distinction in digital broadcasting receiver
US8126293B2 (en) Image processing apparatus, image processing method, and program
KR100705928B1 (en) LCD integrated Digital TV having unified UI
KR100260413B1 (en) Multi-system television receives
EP1909496A1 (en) Broadcast receiving apparatus for providing commerce broadcast without modifying broadcast picture and broadcast providing method thereof
JP2022049817A (en) Receiving device and program
KR101154886B1 (en) Display apparatus and display system
KR100853677B1 (en) Ground wave receiving apparatus and method for digital television

Legal Events

Date Code Title Description
A201 Request for examination
E902 Notification of reason for refusal
E601 Decision to refuse application