KR20160076695A - Apparatus and method for transmitting UHDTV broadcasting signal - Google Patents

Abstract

The present invention relates to an apparatus and a method to transmit a ultra high definition television (UHDTV) broadcasting signal capable of efficiently performing a UHDTV broadcasting service by separating three UHDTV broadcasting services into spare bandwidth of two terrestrial channels and transmitting the separated three UHDTV broadcasting services over the spare bandwidth and making a broadcasting receiver easily synchronize and demodulate broadcasting data separately transmitted over different channels by adding PSI/PSIP information to the UHD broadcasting data transmitted over the channels. The apparatus comprises: an encoding unit to encode UHD broadcasting data with respect to each of different three broadcasting programs; a data processing unit to separate and allocate the encoded three UHD broadcasting data into two channels and additionally process PSI/PSIP information to synchronize the data when demodulating one UHD broadcasting data among the three UHD broadcasting data transmitted over the channels; and a transmission unit to modulate the three UHD broadcasting data allocated to the two channels and transmit the data over the corresponding channels, respectively.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a UHDTV broadcast signal transmitting apparatus,

The present invention relates to a UHDTV (Ultra High Definition TV) broadcasting signal transmission apparatus and method thereof, and more particularly, to a UHDTV broadcasting signal transmission system in which three UHDTV broadcasting services are distributed over two terrestrial channels in terrestrial transmission of UHDTV broadcasting signals The UHDTV broadcast signal is transmitted by adding the PSI / PSIP information for the UHD broadcast data distributed to each channel, thereby efficiently performing the UHDTV broadcast service and facilitating the restoration of the broadcast data at the broadcast receiver side. Device and method thereof.

Digital broadcasting offers HD and SD multi-channel services globally, but the requirements for 3DTV service and ultra high definition TV (UHDTV) service using new digital broadcasting technology And research and development are actively pursued with the increase.

For example, due to the visual resolution characteristic proportional to the size of the display device, there is a problem in that a large-sized display device of 60 inches or more can not provide sufficient image quality in the HD-level service. For devices, 4K (3840x2160) resolution is required.

The UHDTV broadcasting that responds to this is a next-generation real-time broadcasting technology that realizes ultra-high-definition video (4K / 8K) and multi-channel (more than 10 channels) audio which is 4 times to 16 times clearer than that provided by HDTV (2K) .

Regarding UHDTV broadcasting in Korea, the broadcasting frequency band for transmitting analog TV broadcasting is 54 ~ 806MHz, but digital broadcasting is switched to analog broadcasting due to termination of analog terrestrial broadcasting, so that the broadcasting frequency band is reduced to 54 ~ 698MHz. Therefore, since the idle band of 108 MHz remains in the frequency band used for the existing analog TV broadcasting, there is a discussion about providing the service by transmitting the UHDTV broadcast signal in the idle band.

However, the domestic digital terrestrial transmission system uses 8VSB, the transmission bandwidth is 6MHz, and the data capacity is 19.39Mbps, which is a variable data rate. Even if the latest HEVC (High Efficiency Video Coding) compression technology is used, Therefore, it is difficult to provide UHDTV service.

For example, in order to provide a UHDTV broadcasting service of 4K, a data transmission capacity of a standard 25 Mbps variable data rate is generated, but service is difficult due to the terrestrial transmission bandwidth of 6 MHz.

For UHDTV service, the transmission capacity is 20 ~ 25Mbps variable data rate based on 4K. In the case of DVB-T2, transmission bandwidth is up to 45.6Mbps when applying 256QAM at 6MHz. When the Interval 1/8 is applied, the amount of data that can be transmitted is 33.4 Mbps, so there is an idle transmission bandwidth of approximately 8.4 to 13.4 Mbps per channel.

Therefore, there is a need for R & D to perform UHDTV broadcasting service using the idle bandwidth.

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a UHDTV broadcasting service in which three UHDTV broadcasting services are distributed in an idle bandwidth of two terrestrial channels in terrestrial transmission of a UHDTV broadcasting signal, The UHDTV broadcasting signal transmission apparatus and the method thereof.

Another object of the present invention is to distribute UHDTV broadcasting service to two terrestrial channels by distributing three UHDTV broadcasting services in terrestrial transmission, and to transmit PSI / PSIP information for UHD broadcasting data distributed to each channel The present invention provides a UHDTV broadcast signal transmission apparatus and method that can easily synchronize and recover broadcast data distributed over different channels on a broadcast receiver side.

According to another aspect of the present invention, there is provided an apparatus for transmitting a UHDTV broadcast signal, the apparatus comprising: an encoding unit for encoding each of UHD broadcast data for three different broadcast programs; PSU information for synchronizing data when restoring one UHD broadcast data divided and allocated to two channels among the three UHD broadcast data by separately allocating the encoded three UHD broadcast data to two channels, A data processing unit for performing an additional process on the data; And a transmitter for modulating the three UHD broadcast data allocated to the two channels and transmitting the modulated UHD broadcast data through the corresponding channel, respectively.

Wherein the data processing unit comprises: a data separator for separating the second UHD broadcast data among the three UHD broadcast data into a set size; And a PSI / PSIP unit for providing PSI / PSIP information for the separated second UHD broadcast data; And PSI / PSIP information for the second UHD broadcast data and data for a part (1/2) of the separated second UHD broadcast data from the PSI / PSIP constructing unit to add n PSIP information for the second UHD broadcast data provided from the PSI / PSIP configuration unit to the remaining UDP broadcast data that is not allocated to the n channel and the third UHD broadcast data among the separated second UHD broadcast data, To the (n + 1) -th channel.

And allocates the separated second UHD broadcast data to the idle bandwidth of the n-channel and the (n + 1) -th channel, respectively.

According to another aspect of the present invention, there is provided a method for transmitting a UHDTV broadcast signal, the method comprising: encoding each UHD broadcast data for three different broadcast programs; The UHD broadcasting data is divided into two channels and allocated to two channels, and the PSI / UHD broadcasting data for synchronizing UHD broadcasting data when restoring UHD broadcasting data separately allocated to two channels among the three UHD broadcasting data, Adding PSIP information; And modulating the three UHD broadcast data allocated to the two channels and transmitting the modulated UHD broadcast data through the corresponding channel, respectively.

Wherein the assigning comprises: separating the second UHD broadcast data among the three UHD broadcast data into a set size; Adding first UHD broadcast data and PSI / PSIP information for a second UHD broadcast data to a part (1/2) of the separated second UHD broadcast data and assigning it to an n channel; And adding PSI / PSIP information for the second UHD broadcast data to remaining broadcast data not allocated to the n channel and the third UHD broadcast data among the separated second UHD broadcast data and allocating to the n + 1 channel .

The separated second UHD broadcast data is allocated to the idle bandwidth of the n-channel and the (n + 1) -th channel.

According to the present invention, three UHDTV broadcasting services are distributed to the two idle bandwidths of the terrestrial channels in the terrestrial transmission of the UHDTV broadcasting signal, thereby efficiently performing the UHDTV broadcasting service.

That is, according to the present invention, in the 4K UHDTV terrestrial broadcasting, since three UHDTV services can be transmitted using two channels, the frequency utilization efficiency can be increased by one-third compared to the basic mode.

According to the present invention, in transmitting terrestrial signals of an HDTV broadcasting signal, three UHDTV broadcasting services are distributed over two terrestrial channels, and PSI / PSIP information for UHD broadcasting data distributed to each channel is added and transmitted Thus, broadcast data distributed and transmitted through different channels on the broadcast receiver side can be easily synchronized and restored.

1 is a block diagram of a UHDTV broadcast signal transmission apparatus according to the present invention;
FIG. 2 is a diagram schematically illustrating a UHD broadcast data format allocated to n channels and n + 1 channels in the data processor shown in FIG. 1; FIG.
3 is a flowchart illustrating a method of transmitting a UHDTV broadcast signal according to the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention and the manner of achieving them will become apparent with reference to the embodiments described in detail below with reference to the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the invention to those skilled in the art. Is provided to fully convey the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims. Like numbers refer to like elements throughout.

In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear. The following terms are defined in consideration of the functions in the embodiments of the present invention, which may vary depending on the intention of the user, the intention or the custom of the operator. Therefore, the definition should be based on the contents throughout this specification.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a UHDTV broadcast signal transmission apparatus and method according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a block diagram of a UHDTV broadcast signal transmission apparatus according to the present invention. FIG. 2 schematically shows a UHD broadcast data format allocated to n channels and n + 1 channels in the data processor shown in FIG. Fig.

1, a UHDTV broadcasting signal transmission apparatus according to the present invention includes a PSI / PSIP server 10, first, second and third encoding units 21, 22 and 23, a data processing unit 30, First and second format conversion units 41 and 42, first and second modulation units 51 and 52, and first and second transmission units 61 and 62.

The data processing unit 30 includes a PSI / PSIP forming unit 31, a data separating unit 32, and a multiplexing unit 33.

The PSI / PSIP server 10 provides PSI / PSIP information to a plurality of UHD broadcast data to the PSI / PSIP configuration unit 31 of the data processing unit 30. [

The first, second, and third encoding units 21, 22, and 23 respectively receive different UHD broadcast data and encode each UHD broadcast data, respectively. Here, each input UHD broadcast data includes, for example, audio and video data as UHD broadcast data for broadcast programs of different broadcast stations.

That is, the first encoding unit 21 encodes the first UHD broadcast data to be input to the multiplexing unit 33 of the data processing unit 30, and the second encoding unit 22 encodes the second UHD broadcast data, And the third encoding unit 23 encodes the third UHD broadcast data and inputs the third UHD broadcast data to the multiplexing unit 33 of the data processing unit 30. [

When the PSI / PSIP configuration unit 31 of the data processing unit 30 separates and transmits one UHD broadcast data through two channels, the PSI / PSIP configuration unit 31 of the data processing unit 30 transmits the UHD broadcast data (second UHD broadcast data in FIG. 1) / PSIP information and provides it to the multiplexing unit 33. In the case where the PSI / PSIP information is separated through two channels and UHD broadcast data is transmitted, when the receiver receives the corresponding UHD data through each channel, the PSI / PSIP information acquires the synchronization of the UHD broadcast data included in the received channel And information for tracking the sub data.

The data separating unit 32 of the data processing unit 30 separates the second UHD broadcast data into frame units so that the second UHD broadcast data encoded by the second encoding unit 22 can be separated and transmitted through two channels (Approximately 1/2 size) and provides it to the multiplexing unit 33.

The multiplexing unit 33 of the data processing unit 33 multiplexes all of the encoded first UHD broadcast data provided from the first encoding unit 21 and a part of the second UHD broadcast data separated through the data separation unit 32 Approximately 1/2) of data is allocated to n-channel terrestrial waves as shown in Fig. 2 (a). Here, when the first UHD broadcast data + the second UHD broadcast data (1/2) is allocated to the n-channel, the multiplexer 33 separates the data on the n-channel and the (n + 1) PSIP information for the second UHD broadcast data provided from the PSI / PSIP configuration unit 31 for securing synchronization with the transmitted second UHD broadcast data, and then transmits the UHD broadcast data to the first format And provides a part of the separated second UHD broadcast data to idle data of n-channel terrestrial channels.

The multiplexing unit 33 of the data processing unit 30 multiplexes the remaining portion of the second UHD broadcast data separated by the data separating unit 32 And the entire encoded third UHD broadcast data is allocated to the terrestrial wave n + 1 channel as shown in FIG. 2 (b). Here, when the second UHD broadcast data (1/2) + the third UHD broadcast data is allocated to the (n + 1) th channel, the multiplexing unit 33 separates n and PSIP information for the second UHD broadcast data provided from the PSI / PSIP configuration unit 31 for securing synchronization with the second UHD broadcast data transmitted through the UHD broadcast data, 1 format converter 41, and allocates a part of the separated second UHD broadcast data to idle data of n-channel terrestrial channels.

That is, the UHD broadcasting data format allocated to the two terrestrial broadcast channels by the multiplexer 33 of the data processing unit 30 is shown in FIGS. 2A and 2B.

Generally, DVB-T2 has maximum transmission rate of 45.6Mbps when using 256QAM at transmission bandwidth of 6MHz. However, considering the actual broadcasting environment, when the code rate is 2/3 and guard interval is 1/8, the data capacity that can be transmitted is 33.4Mbps. There is an idle transmission bandwidth of ~ 13.4 Mbps. Therefore, the UHD broadcast data can be separated using the idle transmission bandwidth and transmitted through two channels as described above.

The first format converting unit 41 converts the UHD broadcasting data format of the n channel provided from the multiplexing unit 33 of the data processing unit 30 to the broadcast receiver And converts it into a transmission format. That is, header information and other additional information are added to the data format as shown in FIG. 2 (a), converted into a transmission data format, and then supplied to the first modulator 51.

The second format converting unit 42 converts the UHD broadcasting data format for the (n + 1) -th channel, which is provided as shown in FIG. 2 (b), from the multiplexing unit 33 of the data processing unit 30, Into a transmission format for transmission to a broadcast receiver. That is, other additional information such as header information is added to the data format as shown in FIG. 2 (b), converted into a transmission data format, and then supplied to the second modulator 52. Here, the first and second format conversion units 41 and 42 may be gateways for the respective channels.

The first modulator 51 modulates the UHD broadcast data format-converted by the first format converter 41, i.e., the n-channel UHD broadcast data including the first UHD broadcast data and a part of the second UHD broadcast data, 1 transfer unit 61. [0050] Here, the UHD broadcast data for the n-channel includes PSI / PSIP information for the second UHD broadcast data.

The second modulator 52 modulates the UHD broadcast data formatted by the second format converter 32, that is, the rest of the second UHD broadcast data and the n + 1 channel UHD broadcast data including the third UHD broadcast data And provides the modulated data to the second transmission unit 52. Here, UHD broadcast data for the (n + 1) -th channel includes PSI / PSIP information for the second UHD broadcast data.

The first and second transmitting units 61 and 62 transmit the modulated UHD broadcasting data for the n-channel and the (n + 1) -th channel, which are modulated by the first and second modulating units 51 and 52, will be.

In summary, the UHDTV broadcast signal transmission apparatus according to the present invention transmits first UHD broadcast data among UHD broadcast data for three different broadcast programs through terrestrial n channels, 2) is allocated to the n-channel idle bandwidth and then transmitted. At this time, the UHD broadcast data transmitted through the n channel includes PSI / PSIP information for ensuring synchronization with the second UHD broadcast data transmitted through the (n + 1) th channel when restoring the second UHD broadcast data at the broadcast receiver side do.

The third UHD broadcast data is transmitted through the terrestrial n + 1 channel, and the remaining data (1/2) excluding the data transmitted through the n channel among the second UHD broadcast data is transmitted to the (n + 1) Respectively. Similarly, the UHD broadcast data transmitted through the (n + 1) -th channel as described above includes PSI for securing synchronization with the second UHD broadcast data transmitted through the n channel when restoring the second UHD broadcast data at the broadcast receiver side / PSIP information.

Hereinafter, a UHDTV broadcast signal transmission method according to the present invention, which corresponds to the operation of the UHDTV broadcast signal transmission apparatus according to the present invention, will be described step by step with reference to FIG.

3 is a flowchart illustrating a method of transmitting a UHDTV broadcast signal according to the present invention.

3, when first, second, and third UHD broadcast data for three different broadcast programs are input (S301), the first, second, third, and UHD broadcast data are encoded And outputs the encoded first, second and third UHD broadcast data, respectively (S302). Here, each input UHD broadcast data is, for example, UHD broadcast data for a broadcast program of a different broadcast station.

Next, in order to transmit the encoded first, second, and third UHD broadcast data through two channels, first, the second UHD broadcast data is divided into frames of approximately 1/2 size (S303).

Next, all the encoded first UHD broadcast data and a part of the separated second UHD broadcast data (approximately 1/2) are allocated to n-channel terrestrial channels as shown in FIG. 2A. Here, a part of the separated second UHD broadcast data is allocated to idle data of n-channel terrestrial channels.

2 (b), the rest of the separated second UHD broadcast data and the third UHD broadcast data encoded in the third encoding unit 23 are divided into terrestrial waves n + 1 channel (S304). Here, a part of the separated second UHD broadcast data is allocated to idle data of n-channel terrestrial channels.

When the UHD broadcasting data is allocated to the n-channel and the (n + 1) -th channel as described above, the second UHD broadcasting data is separately transmitted through the n-channel and the (n + PSI / PSIP information for the broadcast data is added to the second UHD broadcast data of the n-channel and the (n + 1) -th channel (S305).

That is, the UHD broadcast data format allocated to the three UHD broadcast data and the two terrestrial broadcast channels includes PSI / PSIP information for the second UHD broadcast data as shown in FIGS. 2A and 2B.

In step S305, the UHD broadcasting data format (first UHD broadcasting data + PSI / PSIP information for the second UHD broadcasting data + second UHD broadcasting data (1/2) for the n channel allocated as shown in FIG. ) To the transmission format for transmission to the broadcast receiver through the actual n channel (S304). That is, other additional information such as header information is added to the data format as shown in FIG. 2A and converted into a transmission data format.

In step S305, the UHD broadcasting data format (PSI / PSIP information for the second UHD broadcasting data + the second UHD broadcasting data (1/2) +) for the n + 1 channel allocated as shown in FIG. 3 UHD broadcast data) to a transmission format for transmission to the broadcast receiver through the actual n + 1 channel (S306). That is, other additional information such as header information is added to the data format as shown in FIG. 2 (b) and converted into a transmission data format.

In step S306, the UHD broadcasting data including the first UHD broadcasting data and a part of the second UHD broadcasting data is modulated, and the format-converted UHD broadcasting data, that is, the second UHD broadcasting data, And modulates the UHD broadcast data including the remaining part of the data and the third UHD broadcast data (S307).

The UHD broadcast data allocated to the n channel and the (n + 1) channel are transmitted to the broadcast receiver through the antenna using the frequency bandwidth for each channel (S308).

The UHDTV broadcasting signal transmission method according to the present invention as described above can be summarized as follows. First, the first UHD broadcasting data among the UHD broadcasting data for three different broadcasting programs is transmitted through terrestrial n channels, The data of a part (1/2) of the broadcast data is allocated to the idle bandwidth of the n channel and transmitted. At this time, the UHD broadcast data transmitted through the n channel includes PSI / PSIP information for ensuring synchronization with the second UHD broadcast data transmitted through the (n + 1) th channel when restoring the second UHD broadcast data at the broadcast receiver side do.

The third UHD broadcast data is transmitted through the terrestrial n + 1 channel, and the remaining data (1/2) excluding the data transmitted through the n channel among the second UHD broadcast data is transmitted to the (n + 1) Respectively. Similarly, the UHD broadcast data transmitted through the (n + 1) -th channel as described above includes PSI for securing synchronization with the second UHD broadcast data transmitted through the n channel when restoring the second UHD broadcast data at the broadcast receiver side / PSIP information.

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, but, on the contrary, And various alternatives, modifications, and alterations can be made within the scope.

Therefore, the embodiments described in the present invention and the accompanying drawings are intended to illustrate rather than limit the technical spirit of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments and accompanying drawings . The scope of protection of the present invention should be construed according to the claims, and all technical ideas within the scope of equivalents should be interpreted as being included in the scope of the present invention.

10: PSI / PSIP server
21, 22, 23: the first,
30:
31: PSI / PSIP component
32:
41, 42: First and second format conversion units
51, 52: first and second modulation sections
61, 62: first and second transmission units

Claims (6)

A UHDTV broadcast signal transmission apparatus comprising:
An encoding unit for encoding each UHD broadcast data of three different input broadcast programs;
PSU information for synchronizing data when restoring one UHD broadcast data divided and allocated to two channels among the three UHD broadcast data by separately allocating the encoded three UHD broadcast data to two channels, A data processing unit for performing an additional process on the data; And
A transmitter for modulating three UHD broadcast data allocated to the two channels and transmitting the modulated UHD broadcast data through a corresponding channel;
And a UHDTV broadcast signal transmission device.
The method according to claim 1,
Wherein the data processing unit comprises:
A data separator for separating the second UHD broadcast data among the three UHD broadcast data into a predetermined size; And
A PSI / PSIP unit for providing PSI / PSIP information for the separated second UHD broadcast data; And
PSIP information for the second UHD broadcast data and the second UHD broadcast data provided from the PSI / PSIP forming unit to the data for a part (1/2) of the separated second UHD broadcast data, PSIP information for the second UHD broadcast data provided from the PSI / PSIP constructing unit to the remaining broadcast data not allocated to the n channel and the third UHD broadcast data among the separated second UHD broadcast data, And further allocates to the n + 1 channel.
3. The method of claim 2,
And allocates the separated second UHD broadcast data to the idle bandwidth of the n-channel and the (n + 1) -th channel, respectively.
A method for transmitting a UHDTV broadcast signal,
Encoding each of the UHD broadcast data for the three different input broadcast programs;
The UHD broadcasting data is divided into two channels and allocated to two channels, and the PSI / UHD broadcasting data for synchronizing UHD broadcasting data when restoring UHD broadcasting data separately allocated to two channels among the three UHD broadcasting data, Adding PSIP information; And
Modulating three UHD broadcast data allocated to the two channels and transmitting the UHD broadcast data through a corresponding channel;
And transmitting the UHDTV broadcast signal.
5. The method of claim 4,
Wherein the assigning comprises:
Separating the second UHD broadcast data among the three UHD broadcast data into a set size;
Adding first UHD broadcast data and PSI / PSIP information for a second UHD broadcast data to a part (1/2) of the separated second UHD broadcast data and assigning it to an n channel; And
Adding the PSI / PSIP information for the second UHD broadcast data to the remaining UDP broadcast data not allocated to the n channel and the third UHD broadcast data among the separated second UHD broadcast data to allocate to the n + 1 channel The UHDTV broadcast signal transmission method.
6. The method of claim 5,
Wherein the separated second UHD broadcast data is assigned an idle bandwidth of the n channel and the n + 1 channel, respectively.

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