KR20140095948A - Method and system for providing high definition broadcasting service and ultra high definition broadcasting service - Google Patents

Method and system for providing high definition broadcasting service and ultra high definition broadcasting service Download PDF

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Publication number
KR20140095948A
KR20140095948A KR1020130102430A KR20130102430A KR20140095948A KR 20140095948 A KR20140095948 A KR 20140095948A KR 1020130102430 A KR1020130102430 A KR 1020130102430A KR 20130102430 A KR20130102430 A KR 20130102430A KR 20140095948 A KR20140095948 A KR 20140095948A
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KR
South Korea
Prior art keywords
image
uhd
transport stream
high definition
transport
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KR1020130102430A
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Korean (ko)
Inventor
이광순
박성익
김흥묵
허남호
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한국전자통신연구원
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Priority to US14/163,982 priority Critical patent/US20140211861A1/en
Publication of KR20140095948A publication Critical patent/KR20140095948A/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
    • H04N19/169—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding
    • H04N19/17—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding the unit being an image region, e.g. an object
    • H04N19/172—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding the unit being an image region, e.g. an object the region being a picture, frame or field
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/44—Decoders specially adapted therefor, e.g. video decoders which are asymmetric with respect to the encoder
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/50—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using predictive coding
    • 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]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
    • H04N21/236—Assembling of a multiplex stream, e.g. transport stream, by combining a video stream with other content or additional data, e.g. inserting a URL [Uniform Resource Locator] into a video stream, multiplexing software data into a video stream; Remultiplexing of multiplex streams; Insertion of stuffing bits into the multiplex stream, e.g. to obtain a constant bit-rate; Assembling of a packetised elementary stream
    • 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]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
    • H04N21/242—Synchronization processes, e.g. processing of PCR [Program Clock References]
    • 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]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/25—Management operations performed by the server for facilitating the content distribution or administrating data related to end-users or client devices, e.g. end-user or client device authentication, learning user preferences for recommending movies
    • H04N21/266—Channel or content management, e.g. generation and management of keys and entitlement messages in a conditional access system, merging a VOD unicast channel into a multicast channel
    • H04N21/2662—Controlling the complexity of the video stream, e.g. by scaling the resolution or bitrate of the video stream based on the client capabilities
    • 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
    • H04N21/434—Disassembling of a multiplex stream, e.g. demultiplexing audio and video streams, extraction of additional data from a video stream; Remultiplexing of multiplex streams; Extraction or processing of SI; Disassembling of packetised elementary stream

Abstract

A method for transmitting high definition (HD) images and ultra high definition (UHD) images includes the following steps of: obtaining a first HD image by down-scaling an original UHD image; obtaining at least one of a second HD image or a half-resolution UHD image by down-scaling the original UHD; encoding the first HD image; encoding at least any one of the second HD image and the half-resolution UHD image; generating a first transmission stream by multiplexing and synchronizing the encoded first HD image; generating a second transmission stream by multiplexing and synchronizing at least any one of the encoded second HD image and the encoded half-resolution UHD image; transmitting the first transmission stream through a first transmission channel; and transmitting the second transmission stream through a second transmission channel which is distinguished from the first transmission channel.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a method and system for providing an HD broadcasting service and a UHD broadcasting service,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a system and a method for providing a HD (High Definition) broadcasting service and a UHD (Ultra High Definition) broadcasting service, and more particularly, And transmitting and receiving image information for a UHD broadcasting service through a channel, thereby simultaneously providing an HD image and a UHD image.

Advanced Television System Committee (ATSC) A broadcasting service providing system using a digital television broadcasting transmission system has a physical limit to transmit UHD images since the bandwidth of a transmission signal is 19 Mbps within 6 MHz. Further, in order to provide backward compatibility, it is necessary to provide additional transmission technology and codec technology to provide HD video in the same channel while simultaneously providing UHD video.

Embodiments of the present invention provide a method, apparatus, and system for transmitting / receiving image information for UHD broadcasting service through another channel different from a channel through which image information for HD broadcasting service is transmitted / received, while ensuring backward compatibility to provide.

Embodiments of the present invention also provide a method of using a down scaling technique and an up scaling technique in transmitting / receiving image information for HD broadcasting service and image information for UHD broadcasting service, Device and system.

In addition, embodiments of the present invention provide a method, apparatus, and system for selectively encoding an image corresponding to a UHD image using an inter-picture prediction method.

Embodiments of the present invention also provide a method, an apparatus, and a system that use interpolation in decoding an image corresponding to a UHD image.

A method of transmitting an HD (High Definition) image and an UHD (Ultra High Definition) image according to an exemplary embodiment of the present invention includes downscaling an original UHD image to acquire a first HD image; Obtaining at least one of a second HD image or a half-resolution UHD image by downscaling the original UHD image; Encoding the first HD image; Encoding at least one of the second HD image or the half resolution UHD image; Multiplexing and synchronizing the encoded first HD video to generate a first transport stream; Generating a second transport stream by multiplexing and synchronizing at least any one of the encoded second HD image or the encoded half-resolution UHD image; Transmitting the first transport stream over a first transport channel; And transmitting the second transport stream over a second transport channel that is distinct from the first transport channel.

Wherein the encoding of at least one of the second HD image and the half resolution UHD image comprises encoding at least one of the second HD image or the half resolution UHD image using an inter- And reference encoding the first HD image.

Wherein the step of transmitting the first transport stream over the first transport channel comprises error correction encoding the first transport stream and the second transport stream is transmitted to the second transport stream, The transmitting through the transport channel may include an error correction encoding process of the second transport stream.

A method of transmitting an HD (High Definition) image and an UHD (Ultra High Definition) image according to an exemplary embodiment of the present invention includes downscaling an original UHD (Ultra High Definition) image to acquire a first HD image step; Up scaling the first HD image to obtain an upscaled image; Generating a difference image between the original UHD image and the upscaled image; Obtaining at least one of a second HD image or a UHD image corresponding to the difference image from the difference image; Encoding the first HD image; Encoding at least one of the second HD image or the UHD image; Multiplexing and synchronizing the encoded first HD video to generate a first transport stream; Generating a second transport stream by multiplexing and synchronizing at least one of the encoded second HD image or the encoded UHD image; Transmitting the first transport stream over a first transport channel; And transmitting the second transport stream over a second transport channel that is distinct from the first transport channel.

The step of obtaining at least one of the second HD image and the UHD image from the difference image may include downscaling the difference image to obtain the second HD image.

Wherein the step of transmitting the first transport stream over the first transport channel comprises error correction encoding the first transport stream and the second transport stream is transmitted to the second transport stream, The transmitting through the transport channel may include an error correction encoding process of the second transport stream.

A method of receiving a high definition (HD) image and a high definition (UHD) image according to an exemplary embodiment of the present invention includes receiving a first transport stream through a first transport channel; Receiving a second transport stream over a second transport channel that is distinct from the first transport channel; Demultiplexing and synchronizing the first transport stream; Demultiplexing and synchronizing the second transport stream; Decoding the demultiplexed and synchronized first transport stream to generate a first HD image; Decoding the demultiplexed and synchronized second transport stream to generate a first UHD image; Up scaling the first HD image to obtain an upscaled image; Generating a second UHD image by merging the upscaled image and the first UHD image; And providing the first HD image and the second UHD image.

Wherein the step of decoding the demultiplexed and synchronized second transport stream to generate a first UHD image comprises decoding at least one of a second HD image or a half resolution UHD image by decoding the demultiplexed and synchronized second transport stream ; And upscaling at least one of the second HD image or the half resolution UHD image to generate the first UHD image.

Wherein the step of upscaling at least one of the second HD image or the half resolution UHD image to generate the first UHD image interpolates at least one of the second HD image or the half resolution UHD image Step < / RTI >

The step of merging the upscaled image and the first UHD image to generate the second UHD image may further include interpolating the image obtained by merging the upscaled image and the first UHD image .

Wherein receiving the first transport stream through the first transport channel comprises channel decoding a signal received via the first transport channel to generate the first transport stream, And the step of receiving the second transport stream may include channel decoding the signal received through the second transport channel to generate the second transport stream.

A system for transmitting an HD (High Definition) image and an UHD (Ultra High Definition) image according to an embodiment of the present invention includes a first downscaling unit for downscaling an original UHD image to acquire a first HD image, ; A second downscaling unit for downscaling the original UHD image to acquire at least one of a second HD image and a half-resolution UHD image; A first video encoder for encoding the first HD video; A second image encoder for encoding at least one of the second HD image or the half resolution UHD image; Generates and transmits a first transport stream by multiplexing and synchronizing the encoded first HD image and multiplexes and synchronizes at least one of the encoded second HD image or the encoded half resolution UHD image to generate a second transport stream Multiplexer; And a transmitter for transmitting the first transport stream on a first transport channel and transmitting the second transport stream on a second transport channel differentiated from the first transport channel.

A system for transmitting an HD (High Definition) image and an UHD (Ultra High Definition) image according to the present invention is a system for downscaling an original UHD (Ultra High Definition) image to obtain a first HD image 1 down scaling unit; An up-scaling unit for up scaling the first HD image to obtain an up-scaled image; A difference image generation unit for generating a difference image between the original UHD image and the upscaled image; An image generating unit to acquire at least one of a second HD image from the difference image or a UHD image corresponding to the difference image; A first video encoder for encoding the first HD video; A second image encoder for encoding at least one of the second HD image or the UHD image; Generating a first transport stream by multiplexing and synchronizing the encoded first HD images, and generating a second transport stream by multiplexing and synchronizing at least one of the encoded second HD images or the encoded UHD images, Firearm; And a transmitter for transmitting the first transport stream on a first transport channel and transmitting the second transport stream on a second transport channel differentiated from the first transport channel.

The image generator may include a second downscaling unit for downscaling the difference image to acquire the second HD image.

A system for receiving an HD (High Definition) image and an UHD (Ultra High Definition) image according to an embodiment of the present invention receives a first transport stream through a first transport channel, A receiver for receiving a second transport stream over a second transport channel; A demultiplexer for demultiplexing and synchronizing the first transport stream and demultiplexing and synchronizing the second transport stream; A first video decoder for decoding the demultiplexed and synchronized first transport stream to generate a first HD video; A second image decoder for decoding the demultiplexed and synchronized second transport stream to generate a first UHD image; A first upscaling unit for up scaling the first HD image to acquire an upscaled image; A first image generator for generating a second UHD image by merging the upscaled image and the first UHD image; And an image providing unit for providing the first HD image and the second UHD image.

A second image generator for generating at least one of a second HD image or a half resolution UHD image by decoding the demultiplexed and synchronized second transport stream; And a second upscaling unit for upscaling at least one of the second HD image or the half resolution UHD image to generate the first UHD image.

Embodiments of the present invention provide a method, apparatus, and system for transmitting / receiving image information for UHD broadcasting service through another channel different from a channel through which image information for HD broadcasting service is transmitted / received, while ensuring backward compatibility .

Embodiments of the present invention also provide a method of using a down scaling technique and an up scaling technique in transmitting / receiving image information for HD broadcasting service and image information for UHD broadcasting service, Devices and systems.

In addition, embodiments of the present invention can provide a method, an apparatus, and a system for selectively encoding an image corresponding to a UHD image using an inter-picture prediction method.

In addition, embodiments of the present invention can provide a method, an apparatus, and a system using interpolation in a process of decoding an image corresponding to a UHD image.

1 is a block diagram of a system for providing HD and UHD images according to an embodiment of the present invention.
2 is a diagram illustrating a first transmission system for transmitting an HD image and a UHD image according to an embodiment of the present invention.
3 is a diagram illustrating a process of using a downscaling technique in a first transmission system according to an embodiment of the present invention.
4 is a diagram illustrating a second transmission system for transmitting an HD image and a UHD image according to an embodiment of the present invention.
5 is a diagram illustrating a process of using a down-scaling technique and an up-scaling technique in a second transmission system according to an embodiment of the present invention.
6 is a diagram illustrating a receiving system for receiving an HD image and a UHD image according to an embodiment of the present invention.
7 is a diagram illustrating a process of using a down-scaling technique and an up-scaling technique in a reception system corresponding to a first transmission system according to an embodiment of the present invention.
8 is a diagram illustrating a process of using a downscaling technique and an upscaling technique in a reception system corresponding to a second transmission system according to an embodiment of the present invention.
9 is a flowchart illustrating a method of transmitting an HD image and a UHD image in a first transmission system according to an embodiment of the present invention.
10 is a flowchart showing a method of transmitting an HD image and a UHD image in a second transmission system according to an embodiment of the present invention.
11 is a flowchart illustrating a method of receiving an HD image and a UHD image in a receiving system according to an embodiment of the present invention.
12 is a block diagram illustrating a first transmission system in accordance with an embodiment of the present invention.
13 is a block diagram illustrating a second transmission system according to an embodiment of the present invention.
14 is a block diagram illustrating a receiving system in accordance with an embodiment of the present invention.

Hereinafter, embodiments according to the present invention will be described in detail with reference to the accompanying drawings. However, the present invention is not limited to or limited by the embodiments. In addition, the same reference numerals shown in the drawings denote the same members.

1 is a block diagram of a system for providing HD and UHD images according to an embodiment of the present invention.

Referring to FIG. 1, a system for providing an HD image and a UHD image includes a transmission system and a reception system.

Here, the transmission system includes a video encoder 120 for encoding images obtained from an original UHD (Ultra High Definition) image 110, a multiplexer 130 for multiplexing and synchronizing each of the encoded images to generate a plurality of transport streams And a transmission unit 140 for appropriately distributing the plurality of transport streams and transmitting the transport streams through different channels. At this time, the image encoder 120 includes a downscaling unit for down scaling, which is a process of reducing the resolution of the original UHD image 110, so that a high definition (HD) image or half And an upscaling unit that acquires a half-resolution UHD image and encodes the half-resolution UHD image and increases the resolution of the downscaled image. The up-scaling unit 120 scales up the original UHD image 110 and the up- A difference image between the images can be generated and encoded. In addition, the image encoder 120 may selectively encode the downscaled image by using an inter-picture prediction method.

In addition, the transmission unit 140 may include an error correction encoder and a modulator that perform error correction coding processing on each of a plurality of transport streams.

The receiving system includes a receiver 150 for receiving a plurality of transport streams through different channels, a demultiplexer 160 for demultiplexing and synchronizing each of the plurality of transport streams, and a demultiplexer 160 for demultiplexing and synchronizing a plurality of transport streams, And an image decoder 170 for generating a reconstructed HD image 181 and a reconstructed UHD image 182 by decoding. The receiving system may further include an image providing unit for providing a restored HD image 181 and a restored UHD image 182.

Here, the video decoder 170 includes an upscaling unit for upscaling, which is a process of increasing the resolution of an image obtained from a plurality of transport streams, so that the upscaled image and the UHD image acquired from a plurality of transport streams are merged Thereby generating a restored UHD image 182. [ At this time, a process of generating the restored UHD image 182 or a process of interpolating the UHD image from the plurality of transport streams may be included.

In addition, the receiver 150 may include a demodulator and an error correction decoder that demodulate and decode signals received through different channels and generate a plurality of transport streams.

The system for providing the HD image and the UHD image according to an embodiment of the present invention includes an encoder for encoding the HD image in the transmission system and a decoder for outputting the HD image in the reception system, have.

2 is a diagram illustrating a first transmission system for transmitting an HD image and a UHD image according to an embodiment of the present invention.

Referring to FIG. 2, the first transmission system includes a downscaling unit 220, a video encoder 230, a multiplexer 240, and a transmission unit 250. The downscaling unit 220 down-scales the original UHD image 210 to obtain a first HD image and downscales the original UHD image 210 to generate a second HD image or And a second downscaling unit 222 for acquiring at least one of half-resolution UHD images. At this time, the downscaling unit 220 may be included in the image encoder 230 and the second downscaling unit 222 may be included in the transmission capacity of the second transmission channel 270 or the efficiency of the second image encoder 232 Accordingly, it is possible to selectively generate the second HD image and the half resolution UHD image. A detailed description thereof will be described with reference to Fig.

The image encoder 230 may also include a first image encoder 231 for encoding the downscaled first HD image and a second image encoder 231 for encoding at least one of the downscaled second HD image or the downscaled half- And a video encoder 232. In this case, the second video encoder 232 may selectively encode at least one of the second HD video or the half-resolution UHD video to the first HD video using the inter picture prediction scheme.

The multiplexer 240 may multiplex and synchronize audio and various additional data of the encoded first HD video to generate a first transport stream and may multiplex audio and / or audio of at least one of the second HD video or half resolution UHD video, Various additional data can be multiplexed and synchronized to generate a second transport stream.

The transmitting unit 250 may transmit the first transport stream through the first transport channel 260 and may transmit the second transport stream to the second transport channel 270 having a smaller capacity than the first transport channel 260 Lt; / RTI > The transmission unit 250 also includes a first error correction encoder 251 for performing error correction coding processing on the first transport stream and a second error correction encoder 252 for performing error correction coding processing on the second transport stream And may include a modulator 253. Here, the first transmission channel 260 and the second transmission channel 270 may correspond to a base layer and an enhancement layer, respectively, in case of hierarchical modulation, and may be different transmission channels in case of a hybrid network. For example, in the case of a hybrid network, the first transmission channel 260 may be a broadcasting network and the second transmission channel 270 may be an IP network.

When the first transmission system uses the Advanced Television System Committee (ATSC) digital television broadcasting transmission method, the first video encoder 231 may correspond to the MPEG-2 video encoder, and the first error correction encoding apparatus may correspond to the TCM . Also, the second image encoder 232 may correspond to the HEVC image encoder, and the second error correction encoder may correspond to the LDPC.

3 is a diagram illustrating a process of using a downscaling technique in a first transmission system according to an embodiment of the present invention.

Referring to FIG. 3, although the 4K original UHD image 310 is assumed to be 6X6 image pixels, the 4K original UHD image 310 may be extended to 3840X2160 image pixels.

If the image input to the first transmission system is a 4K original UHD image 310, the first downscaling unit down-scales the original UHD image 310 by 4: 1, 320). For example, the first downscaling unit may select one of the four image pixels of the original UHD image 310 and downsample (311). More specifically, for example, the first downscaling unit may select 0 out of 0, 1, 10, 11 image pixels, 2 out of 2, 3, 12, 13 image pixels, 4, 5, 14 , 4 out of 15 image pixels may be selected and downsampled (311).

In addition, the downscaled first HD image 320 may be transmitted to the first image encoder 350 and encoded.

The second downscaling unit downsamples (312,313) the original UHD image 310 to 4: 1 or 2: 1 according to the transmission capacity of the second transmission channel or the efficiency of the second image encoder, At least one of the HD image 330 and the half resolution UHD image 340 can be selectively acquired. For example, the second downscaling unit may select one of four image pixels in the diagonal direction of the original UHD image 310, or downsample two images by selecting (312, 313). More specifically, for example, if the second downscaling unit selects one of the four image pixels, 11 of the image pixels of 0, 1, 10, and 11 are selected, and 2, 3, 12, 13, and 15 of the 4, 5, 14, and 15 image pixels are selected and down-sampled by 4: 1 (312) to obtain the second HD image 330. [ On the other hand, when the second downscaling unit selects two of the four image pixels, 1 and 11 among 0, 1, 10, and 11 image pixels are selected, and 2, 3, 12, 3, and 13, and 5 and 15 among the 4, 5, 14, and 15 image pixels are selected and down-sampled by 2: 1 (313) to obtain the half resolution UHD image 340. At this time, the second downscaling unit can select three down-sampling pixels of four image pixels, and the first down-scaling unit and the second down-scaling unit include an anti-aliasing filter, Before performing the sampling process, an anti-aliasing process can be performed.

In addition, the downscaled second HD image 330 or the half-resolution UHD image 340 may be transmitted to the second image encoder 360 and encoded.

4 is a diagram illustrating a second transmission system for transmitting an HD image and a UHD image according to an embodiment of the present invention.

4, the second transmission system includes a first downscaling unit 411, an upscaling unit 412, a difference image generation unit 413, an image generation unit 420, a video encoder 430, (440) and a transmission unit (450). The first downscaling unit 411 downscales the original UHD image 410 to obtain a first HD image. The upscaling unit 4121 upscales the first HD image to generate an upscaled image Can be obtained. The difference image generation unit 413 can generate a difference image between the original UHD image 410 and the upscaled image.

The image generating unit 420 includes a second downscaling unit 421 for downscaling a difference image between the upscaled image and the original UHD image 410 in the upscaling unit 412 to acquire a second HD image Thereby providing the second HD image to the image encoder 430. [ At this time, if the second downscaling unit 421 is not included, the image generating unit 420 may transmit the UHD image corresponding to the difference image to the image encoder 430 as it is. A detailed description thereof will be described with reference to Fig.

The image encoder 430 includes a first image encoder 431 for encoding the first HD image and a second image encoder 432 for encoding at least one of the second HD image or the UHD image corresponding to the difference image .

The multiplexer 440 multiplexes and synchronizes the audio and various additional data of the encoded first HD video to generate the first transport stream, and at least one of the second HD video or the UHD video corresponding to the difference video The audio and various additional data of the first transport stream can be multiplexed and synchronized to generate the second transport stream.

The transmitter 450 may transmit the first transport stream on the first transport channel 460 and may transmit the second transport stream on the second transport channel 470 having a smaller capacity than the first transport channel 460 Lt; / RTI > The transmitting unit 450 includes a first error correction encoder 451 for performing error correction coding processing on the first transport stream and a second error correction encoder 452 for performing error correction coding processing on the second transport stream And may include a modulator 453.

5 is a diagram illustrating a process of using a down-scaling technique and an up-scaling technique in a second transmission system according to an embodiment of the present invention.

Referring to FIG. 5, although the 4K original UHD image 510 is assumed to be 6X6 image pixels, the 4K original UHD image 510 may be extended to 3840X2160 image pixels.

If the image input to the second transmission system is a 4K original UHD image 510, the first downscaling unit down-scales the original UHD image 510 by 4: 1 to 511, 520). For example, the first downscaling unit may select one of the four image pixels of the original UHD image 510 and downsample (511). More specifically, for example, the first downscaling unit may select 0 out of 0, 1, 10, 11 image pixels, 2 out of 2, 3, 12, 13 image pixels, 4, 5, 14 , 4 out of 15 image pixels may be selected and downsampled (511).

The downscaled first HD image 520 may be transmitted to the first image encoder 560 and encoded and the first HD image 520 may be delivered to the upscaling unit and may be upscaled by 1: ) Upscaled image 530 may be obtained. For example, the upscaling unit may be upscaled by generating new image pixels from the first HD image 520 (521). More specifically, for example, the upscaling unit may upscale (521) by generating new image pixels of.

The difference image generator may generate the difference image 540 by calculating 512 the difference between the original UHD image 510 and the upscaled image 530. For example, the difference image generation unit may remove a plurality of image pixels included in the upscaled image 530 from a plurality of image pixels included in the original UHD image, obtain new image pixels with differences, An image 540 can be generated. At this time, the black pixels included in the difference image 540 may mean pixels having a pixel value of zero.

The difference image 540 may be transmitted (541) to the second image encoder 570 through the image generating unit as it is. At this time, the difference image 540 may be a UHD-level image. On the other hand, the difference image 540 is transferred to the second downscaling unit included in the image generation unit, and the downscaling process 542 is performed, so that the second HD image 550 can be obtained. For example, the second downscaling unit may select one of the four image pixels of the difference image 540 and downsample (542) to 4: 1 to obtain the second HD image 550. For example, the second downscaling unit may select one of the image pixels of the difference image 540, select one of the image pixels of the difference image 540, select one of the image pixels of the difference image 540 and downsample (542) The second HD image 550 can be acquired. At this time, the difference image 540 is down-sampled in the diagonal direction, so that the degree of image quality loss can be minimized.

Also, the UHD image corresponding to the downscaled second HD image 550 or the difference image 540 may be transmitted to the second image encoder 570 and encoded.

6 is a diagram illustrating a receiving system for receiving an HD image and a UHD image according to an embodiment of the present invention.

6, the receiving system includes a receiving unit 610, a demultiplexer 640, a video decoder 650, a first upscaling unit 660, a first image generating unit 670, and an image providing unit 680, . Here, the receiving unit 610 may receive the first transport stream through the first transport channel 620 and may transmit the second transport stream to the second transport channel 630 having a smaller capacity than the first transport channel 620 ). ≪ / RTI > The receiving unit 610 may include a demodulator 611 for channel decoding a signal received through the first transmission channel 620 and the second transmission channel 630 and may perform error correction decoding processing And a second error correction decoder 613 for performing an error correction decoding process on the second transport stream. Here, the first transmission channel 620 and the second transmission channel 630 may correspond to a base layer and an enhancement layer, respectively, in case of hierarchical modulation, and may be different transmission channels in case of a hybrid network. For example, in the case of a hybrid network, the first transmission channel 620 may be a broadcasting network, and the second transmission channel 630 may be an IP network.

Demultiplexer 640 may separate each of the first transport stream and the second transport stream into video and audio streams and synchronize them in time.

Also, the video decoder 650 includes a first video decoder 651 for decoding the first transport stream demultiplexed and synchronized to generate a first HD video, a second video decoder 651 for decoding the demultiplexed and synchronized second transport stream, And a second image decoder 652 for generating a UHD image. Here, the second video decoder 652 includes a second video generator 653 for decoding at least one of the second HD video and the half-resolution UHD video by decoding the demultiplexed and synchronized second transport stream, And a second upscaling unit 654 for upscaling at least one of an image and a half resolution UHD image to generate a first UHD image, thereby generating a first UHD image from the demultiplexed and synchronized second transport stream . At this time, the second up-scaling unit 654 may interpolate at least one of the second HD image or the half-resolution UHD image to generate the first UHD image. On the other hand, the second image decoder 652 does not include the second image generator 653 and the second upscaling unit 654, and directly generates the first UHD image from the demultiplexed and synchronized second transport stream You may.

The first upscaling unit 660 may upscale the first HD image to obtain an upscaled image, and the first image generating unit 670 may upscale the first HD image from the first upscaling unit 660, The second UHD image can be generated by merging the image and the first UHD image. In this case, the first image generating unit 670 may generate a second UHD image by interpolating an image obtained by merging the upscaled image and the first UHD image.

Also, the image providing unit 680 may provide the generated first HD image and the second UHD image. In this case, the first HD image may be the restored HD image received from the transmission system, and the second UHD image may be the restored UHD image received from the transmission system.

When the receiving system uses the ATSC digital television broadcasting transmission scheme, the first video decoder 651 may correspond to the MPEG-2 video decoder, and the first error correction decoder may correspond to the TCM. Also, the second video decoder 652 may correspond to an HEVC image decoder, and the second error correction decoder may correspond to an LDPC decoder.

7 is a diagram illustrating a process of using a down-scaling technique and an up-scaling technique in a reception system corresponding to a first transmission system according to an embodiment of the present invention.

Referring to FIG. 7A, the upscaled image is up-sampled from the first HD image 710 generated from the first image decoder through a first up-scaling unit to 1: 4 and upscaled (711) And the first UHD image can be obtained 721 by upsampling and upscaling from the second HD image 720 generated from the second image decoder to 1: 4 through the second upscaling unit.

(a), the first image generator merges the upscaled image and the first UHD image (712) to obtain the reconstructed image (730), and interpolates the reconstructed image (730) using the interpolation filter The first UHD image 731, and the second UHD image 740, respectively.

7 (b), the up-scaled image is up-sampled up-scaled from the first HD image 750 generated from the first image decoder through the first up-scaling unit to 1: 4 751), and the first UHD image may be obtained (761) by upsampling 1: 2 upscaled from the half resolution UHD image 760 generated from the second image decoder through the second upscaling unit .

(b), the first image generator merges the upscaled image and the first UHD image (752) to obtain the reconstructed image (770), and interpolates the reconstructed image (770) using the interpolation filter A first UHD image 771, and a second UHD image 780. [ Accordingly, the second UHD image 780 generated according to the case (b) may have a better image quality than the second UHD image 740 generated according to the case (a).

8 is a diagram illustrating a process of using a downscaling technique and an upscaling technique in a reception system corresponding to a second transmission system according to an embodiment of the present invention.

Referring to FIG. 8, the upscaled image 830 is up-sampled from the first HD image 810 generated from the first image decoder through the first up-scaling unit 1: 4 and upscaled (811) , And the first UHD image 840 may be obtained 821 by upsampling and upscaling from the second HD image 820 generated from the second video decoder through the second upscaling unit 1: 4. At this time, the second up-scaling unit may generate the first UHD image 840 by interpolating the second HD image 820 only in the horizontal or vertical direction.

The first image generating unit may generate the second UHD image 860 by merging the upscaled image 830 and the first UHD image 840 (850).

9 is a flowchart illustrating a method of transmitting an HD image and a UHD image in a first transmission system according to an embodiment of the present invention.

Referring to FIG. 9, the first transmission system downscales the original UHD image to obtain a first HD image (910).

Also, the first transmission system downscales the original UHD image to obtain at least one of a second HD image or a half-resolution UHD image (step 920).

Also, the first transmission system encodes the first HD video (930).

Also, the first transmission system encodes at least one of the second HD image or the half resolution UHD image (940). At this time, the encoding of at least one of the second HD image and the half resolution UHD image may include encoding at least one of the second HD image and the half resolution UHD image using an inter-picture prediction method And performing reference encoding on the HD image.

Further, the first transmission system multiplexes and synchronizes the encoded first HD image to generate a first transport stream (950).

Further, the first transmission system multiplexes and synchronizes at least one of the encoded second HD image or the encoded half-resolution UHD image to generate a second transport stream (960).

Also, the first transmission system transmits the first transport stream on the first transport channel (970). In this case, the process of transmitting the first transport stream through the first transport channel may include an error correction encoding process of the first transport stream.

In addition, the first transmission system transmits the second transport stream through a second transport channel different from the first transport channel (980). In this case, the process of transmitting the second transport stream through the second transport channel may include an error correction encoding process of the second transport stream.

10 is a flowchart showing a method of transmitting an HD image and a UHD image in a second transmission system according to an embodiment of the present invention.

Referring to FIG. 10, the second transmission system downscales an original Ultra High Definition (UHD) image to acquire a first HD image (1005).

Also, the second transmission system up scales the first HD image to obtain an upscaled image (1010).

Also, the second transmission system generates a difference image between the original UHD image and the upscaled image (1015).

In addition, the second transmission system obtains at least one of the second HD image or the UHD image corresponding to the difference image from the difference image (1020). At this time, the process of acquiring the second HD image from the difference image or the UHD image corresponding to the difference image may include a process of downscaling the difference image to acquire the second HD image.

Also, the second transmission system encodes the first HD video (1025).

Also, the second transmission system encodes at least one of the second HD image or the UHD image (1030).

In addition, the second transmission system multiplexes and synchronizes the encoded first HD video to generate a first transport stream (1035).

In addition, the second transmission system multiplexes and synchronizes at least one of the encoded second HD image or the encoded UHD image to generate a second transport stream (1040).

In addition, the second transmission system transmits the first transport stream through the first transport channel (1045). In this case, the process of transmitting the first transport stream through the first transport channel may include an error correction encoding process of the first transport stream.

In addition, the second transmission system transmits the second transport stream through a second transport channel different from the first transport channel (1050). In this case, the process of transmitting the second transport stream through the second transport channel may include an error correction encoding process of the second transport stream.

11 is a flowchart illustrating a method of receiving an HD image and a UHD image in a receiving system according to an embodiment of the present invention.

Referring to FIG. 11, the receiving system receives a first transport stream on a first transport channel (1110). In this case, the process of receiving the first transport stream through the first transport channel may include a process of channel decoding the signal received through the first transport channel to generate the first transport stream.

In addition, the receiving system receives the second transport stream through a second transport channel that is distinct from the first transport channel (1120). In this case, the step of receiving the second transport stream through the second transport channel may include the step of channel decoding the signal received through the second transport channel to generate the second transport stream.

In addition, the receiving system demultiplexes and synchronizes the first transport stream (1130).

The receiving system also demultiplexes and synchronizes the second transport stream (1140).

Also, the receiving system decodes the demultiplexed and synchronized first transport stream to generate a first HD image (1150).

In addition, the receiving system decodes the demultiplexed and synchronized second transport stream to generate a first UHD image (1160). At this time, the process of decoding the demultiplexed and synchronized second transport stream to generate the first UHD image may include decoding at least one of the second HD image or the half resolution UHD image by decoding the demultiplexed and synchronized second transport stream, And generating a first UHD image by upscaling at least one of the second HD image and the half resolution UHD image. Here, the process of upscaling at least one of the second HD image or the half resolution UHD image to generate the first UHD image may include interpolating at least one of the second HD image or the half resolution UHD image .

The receiving system also upscales the first HD image to obtain an upscaled image (1170).

Also, the receiving system merges the upscaled image and the first UHD image to generate a second UHD image (1180). At this time, the process of merging the upscaled image and the first UHD image to generate the second UHD image may further include a step of interpolating the image obtained by merging the upscaled image and the first UHD image .

Also, the receiving system provides a first HD image and a second UHD image (1190).

12 is a block diagram illustrating a first transmission system in accordance with an embodiment of the present invention.

12, the first transmission system includes a first downscaling unit 1210, a second downscaling unit 1220, a first image encoder 1230, a second image encoder 1240, a multiplexer 1250, And a transmission unit 1260.

The first downscaling unit 1210 down scales the original UHD image to obtain a first HD image.

The second downscaling unit 1220 downscales the original UHD image to obtain at least one of a second HD image or a half-resolution UHD image.

The first image encoder 1230 encodes the first HD image.

The second image encoder 1240 encodes at least one of the second HD image or the half resolution UHD image.

The multiplexer 1250 multiplexes and synchronizes the encoded first HD video to generate a first transport stream and multiplexes and synchronizes at least one of the encoded second HD video or the encoded half resolution UHD video to generate a second transmission And generates a stream.

The transmitter 1260 transmits the first transport stream on the first transport channel and transmits the second transport stream on the second transport channel different from the first transport channel.

13 is a block diagram illustrating a second transmission system according to an embodiment of the present invention.

13, the second transmission system includes a first downscaling unit 1310, an upscaling unit 1320, a difference image generation unit 1330, an image generation unit 1340, a first image encoder 1350, A second image encoder 1360, a multiplexer 1370, and a transmission unit 1380. [

The first downscaling unit 1310 downscales the original Ultra High Definition (UHD) image to obtain the first HD image.

The upscaling unit 1320 up scales the first HD image to obtain an upscaled image.

The difference image generation unit 1330 generates a difference image between the original UHD image and the upscaled image.

The image generating unit 1340 acquires at least one of the second HD image or the UHD image corresponding to the difference image from the difference image.

The image generating unit 1340 may include a second downscaling unit 1341 for downscaling the difference image to obtain a second HD image.

The first image encoder 1350 encodes the first HD image.

The second image encoder 1360 encodes at least one of the second HD image or the UHD image.

The multiplexer 1370 multiplexes and synchronizes the encoded first HD image to generate a first transport stream, and multiplexes and synchronizes at least one of the encoded second HD image or the encoded UHD image to generate a second transport stream .

The transmitting unit 1380 transmits the first transport stream through the first transport channel and transmits the second transport stream through the second transport channel different from the first transport channel.

14 is a block diagram illustrating a receiving system in accordance with an embodiment of the present invention.

14, the receiving system includes a receiving unit 1410, a demultiplexer 1420, a first video decoder 1430, a second video decoder 1440, a first upscaling unit 1450, (1460) and an image providing unit (1470).

The receiver 1410 receives the first transport stream through the first transport channel and receives the second transport stream through the second transport channel different from the first transport channel.

Demultiplexer 1420 demultiplexes and synchronizes the first transport stream and demultiplexes and synchronizes the second transport stream.

The first video decoder 1430 decodes the demultiplexed and synchronized first transport stream to generate a first HD video.

The second video decoder 1440 decodes the demultiplexed and synchronized second transport stream to generate a first UHD image.

The second video decoder 14440 includes a second video generator 1441 for generating at least one of a second HD video or a half resolution UHD video by decoding the demultiplexed and synchronized second transport stream, And a second up-scaling unit 1442 for up-scaling at least one of an image and a half-resolution UHD image to generate a first UHD image.

The first up-scaling unit 1450 up scales the first HD image to obtain an up-scaled image.

The first image generator 1460 merges the upscaled image and the first UHD image to generate a second UHD image.

The video data providing unit 1470 provides the first HD video and the second UHD video.

The apparatus described above may be implemented as a hardware component, a software component, and / or a combination of hardware components and software components. For example, the apparatus and components described in the embodiments may be implemented within a computer system, such as, for example, a processor, a controller, an arithmetic logic unit (ALU), a digital signal processor, a microcomputer, a field programmable array (FPA) A programmable logic unit (PLU), a microprocessor, or any other device capable of executing and responding to instructions. The processing device may execute an operating system (OS) and one or more software applications running on the operating system. The processing device may also access, store, manipulate, process, and generate data in response to execution of the software. For ease of understanding, the processing apparatus may be described as being used singly, but those skilled in the art will recognize that the processing apparatus may have a plurality of processing elements and / As shown in FIG. For example, the processing unit may comprise a plurality of processors or one processor and one controller. Other processing configurations are also possible, such as a parallel processor.

The software may include a computer program, code, instructions, or a combination of one or more of the foregoing, and may be configured to configure the processing device to operate as desired or to process it collectively or collectively Device can be commanded. The software and / or data may be in the form of any type of machine, component, physical device, virtual equipment, computer storage media, or device , Or may be permanently or temporarily embodied in a transmitted signal wave. The software may be distributed over a networked computer system and stored or executed in a distributed manner. The software and data may be stored on one or more computer readable recording media.

The method according to an embodiment may be implemented in the form of a program command that can be executed through various computer means and recorded in a computer-readable medium. The computer-readable medium may include program instructions, data files, data structures, and the like, alone or in combination. The program instructions to be recorded on the medium may be those specially designed and configured for the embodiments or may be available to those skilled in the art of computer software. Examples of computer-readable media include magnetic media such as hard disks, floppy disks and magnetic tape; optical media such as CD-ROMs and DVDs; magnetic media such as floppy disks; Magneto-optical media, and hardware devices specifically configured to store and execute program instructions such as ROM, RAM, flash memory, and the like. Examples of program instructions include machine language code such as those produced by a compiler, as well as high-level language code that can be executed by a computer using an interpreter or the like. The hardware devices described above may be configured to operate as one or more software modules to perform the operations of the embodiments, and vice versa.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. For example, it is to be understood that the techniques described may be performed in a different order than the described methods, and / or that components of the described systems, structures, devices, circuits, Lt; / RTI > or equivalents, even if it is replaced or replaced.

Therefore, other implementations, other embodiments, and equivalents to the claims are also within the scope of the following claims.

Claims (16)

A method for transmitting a High Definition (HD) image and an Ultra High Definition (UHD) image,
Acquiring a first HD image by down scaling the original UHD image;
Obtaining at least one of a second HD image or a half-resolution UHD image by downscaling the original UHD image;
Encoding the first HD image;
Encoding at least one of the second HD image or the half resolution UHD image;
Multiplexing and synchronizing the encoded first HD video to generate a first transport stream;
Generating a second transport stream by multiplexing and synchronizing at least any one of the encoded second HD image or the encoded half-resolution UHD image;
Transmitting the first transport stream over a first transport channel; And
Transmitting the second transport stream over a second transport channel differentiated from the first transport channel;
(HD) image and a UHD (Ultra High Definition) The method according to claim 1,
Wherein encoding at least one of the second HD image or the half resolution UHD image comprises:
Encoding the at least one of the second HD image or the half-resolution UHD image with respect to the first HD image using an inter-picture prediction scheme
(HD) image and a UHD (Ultra High Definition) The method according to claim 1,
Wherein the transmitting the first transport stream over the first transport channel comprises:
A step of error correction coding the first transport stream
Lt; / RTI >
And transmitting the second transport stream over the second transport channel that is distinct from the first transport channel
A step of error correction coding the second transport stream
(HD) image and a UHD (Ultra High Definition) A method for transmitting a High Definition (HD) image and an Ultra High Definition (UHD) image,
Acquiring a first HD image by down scaling an original Ultra High Definition (UHD) image;
Up scaling the first HD image to obtain an upscaled image;
Generating a difference image between the original UHD image and the upscaled image;
Obtaining at least one of a second HD image or a UHD image corresponding to the difference image from the difference image;
Encoding the first HD image;
Encoding at least one of the second HD image or the UHD image;
Multiplexing and synchronizing the encoded first HD video to generate a first transport stream;
Generating a second transport stream by multiplexing and synchronizing at least one of the encoded second HD image or the encoded UHD image;
Transmitting the first transport stream over a first transport channel; And
Transmitting the second transport stream over a second transport channel differentiated from the first transport channel;
(HD) image and a UHD (Ultra High Definition) 5. The method of claim 4,
The step of acquiring at least one of the second HD image or the UHD image from the difference image
Downscaling the difference image to obtain the second HD image
(HD) image and a UHD (Ultra High Definition) 5. The method of claim 4,
Wherein the transmitting the first transport stream over the first transport channel comprises:
A step of error correction coding the first transport stream
Lt; / RTI >
And transmitting the second transport stream over the second transport channel that is distinct from the first transport channel
A step of error correction coding the second transport stream
(HD) image and a UHD (Ultra High Definition) A method for receiving a High Definition (HD) image and an Ultra High Definition (UHD) image,
Receiving a first transport stream over a first transport channel;
Receiving a second transport stream over a second transport channel that is distinct from the first transport channel;
Demultiplexing and synchronizing the first transport stream;
Demultiplexing and synchronizing the second transport stream;
Decoding the demultiplexed and synchronized first transport stream to generate a first HD image;
Decoding the demultiplexed and synchronized second transport stream to generate a first UHD image;
Up scaling the first HD image to obtain an upscaled image;
Generating a second UHD image by merging the upscaled image and the first UHD image; And
Providing the first HD image and the second UHD image
(HD) image and a UHD (Ultra High Definition) image. 8. The method of claim 7,
The step of decoding the demultiplexed and synchronized second transport stream to generate a first UHD image
Generating at least one of a second HD image or a half resolution UHD image by decoding the demultiplexed and synchronized second transport stream; And
Scaling at least one of the second HD image or the half resolution UHD image to generate the first UHD image
(HD) image and a UHD (Ultra High Definition) 9. The method of claim 8,
The step of upscaling at least one of the second HD image or the half resolution UHD image to generate the first UHD image
Interpolating at least one of the second HD image or the half resolution UHD image
(HD) image and a UHD (Ultra High Definition) 8. The method of claim 7,
The step of merging the upscaled image and the first UHD image to generate the second UHD image
Interpolating an image obtained by merging the upscaled image and the first UHD image,
(HD) image and a UHD (Ultra High Definition) 8. The method of claim 7,
Wherein the receiving the first transport stream over the first transport channel comprises:
Generating a first transport stream by channel decoding a signal received through the first transport channel;
Lt; / RTI >
Wherein receiving the second transport stream over the second transport channel comprises:
Generating a second transport stream by channel decoding a signal received via the second transport channel;
(HD) image and a UHD (Ultra High Definition) A system for transmitting an HD (High Definition) image and an UHD (Ultra High Definition) image,
A first downscaling unit for downscaling the original UHD image to acquire a first HD image;
A second downscaling unit for downscaling the original UHD image to acquire at least one of a second HD image and a half-resolution UHD image;
A first video encoder for encoding the first HD video;
A second image encoder for encoding at least one of the second HD image or the half resolution UHD image;
Generates and transmits a first transport stream by multiplexing and synchronizing the encoded first HD image and multiplexes and synchronizes at least one of the encoded second HD image or the encoded half resolution UHD image to generate a second transport stream Multiplexer; And
And a transmission unit for transmitting the first transport stream on a first transport channel and the second transport stream on a second transport channel differentiated from the first transport channel,
(High Definition) image and UHD (Ultra High Definition) image including the image data. A system for transmitting an HD (High Definition) image and an UHD (Ultra High Definition) image,
A first downscaling unit for downscaling an original Ultra High Definition (UHD) image to acquire a first HD image;
An up-scaling unit for up scaling the first HD image to obtain an up-scaled image;
A difference image generation unit for generating a difference image between the original UHD image and the upscaled image;
An image generating unit to acquire at least one of a second HD image from the difference image or a UHD image corresponding to the difference image;
A first video encoder for encoding the first HD video;
A second image encoder for encoding at least one of the second HD image or the UHD image;
Generating a first transport stream by multiplexing and synchronizing the encoded first HD images, and generating a second transport stream by multiplexing and synchronizing at least one of the encoded second HD images or the encoded UHD images, Firearm; And
And a transmission unit for transmitting the first transport stream on a first transport channel and the second transport stream on a second transport channel differentiated from the first transport channel,
(High Definition) image and UHD (Ultra High Definition) image including the image data. 14. The method of claim 13,
The image generation unit
A second downscaling unit for downscaling the difference image to obtain the second HD image,
(High Definition) image and UHD (Ultra High Definition) image including the image data. 1. A system for receiving an HD (High Definition) image and an UHD (Ultra High Definition) image,
A receiver for receiving a first transport stream on a first transport channel and a second transport stream on a second transport channel differentiated from the first transport channel;
A demultiplexer for demultiplexing and synchronizing the first transport stream and demultiplexing and synchronizing the second transport stream;
A first video decoder for decoding the demultiplexed and synchronized first transport stream to generate a first HD video;
A second image decoder for decoding the demultiplexed and synchronized second transport stream to generate a first UHD image;
A first upscaling unit for up scaling the first HD image to acquire an upscaled image;
A first image generator for generating a second UHD image by merging the upscaled image and the first UHD image; And
The first HD image and the second UHD image,
(High Definition) image and UHD (Ultra High Definition) image including the image data. 16. The method of claim 15,
The second video decoder
A second image generator for generating at least one of a second HD image or a half resolution UHD image by decoding the demultiplexed and synchronized second transport stream; And
A second upscaling unit for upscaling at least one of the second HD image and the half resolution UHD image to generate the first UHD image,
(HD) image and UHD (Ultra High Definition)
KR1020130102430A 2013-01-25 2013-08-28 Method and system for providing high definition broadcasting service and ultra high definition broadcasting service KR20140095948A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016129891A1 (en) * 2015-02-11 2016-08-18 엘지전자 주식회사 Method and device for transmitting and receiving broadcast signal

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016129891A1 (en) * 2015-02-11 2016-08-18 엘지전자 주식회사 Method and device for transmitting and receiving broadcast signal
US10594978B2 (en) 2015-02-11 2020-03-17 Lg Electronics Inc. Method and device for transmitting and receiving broadcast signal

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