KR20150047864A

KR20150047864A - Transmitting and receiving method and apparatus for providing high-definition digital broadcasting

Info

Publication number: KR20150047864A
Application number: KR1020130127883A
Authority: KR
Inventors: 윤국진; 정원식; 이광순; 허남호; 심주섭
Original assignee: 한국전자통신연구원
Priority date: 2013-10-25
Filing date: 2013-10-25
Publication date: 2015-05-06

Abstract

The present invention relates to transmission and reception methods and an apparatus thereof for providing a high-definition digital broadcast, and more specifically to a high-definition broadcast service method using the 3D broadcast system based on the existing dual stream. According to the present invention, a viewer can receive more improved high-definition DTV service through the service of a digital broadcast, having the definition more than two times higher than that of the current DTV broadcast service, without separate change of the 3DTV broadcast system based on dual stream.

Description

METHOD AND APPARATUS FOR PROVIDING HIGH-QUALITY DIGITAL BROADCASTING

The present invention relates to a high-quality DTV broadcasting service method using a conventional dual stream based 3D broadcasting system.

The following drawings are schematic diagrams of the currently established ATSC A104 (standard for service compatible terrestrial 3D broadcasting service) and a 3D broadcasting system.

The ATSC standard, which serves bi-stable 3D images using a reference video encoder and an additional video encoder, switches to a separate encoder when the 2D image is served, or encodes the same image as the reference image to the additional image encoder Indicating that the additional data is not 3D, and displays it to the viewer

If the additional image encoder is stopped without switching to another encoder, a screen flicker may occur when switching from 3D to 2D, or reception may not be possible depending on the receiver.

In addition, according to the existing DTV broadcasting system, a 30 frame image per second is encoded in the first encoder and the second encoder, thereby displaying the conventional DTV receiver at 30 fps. However, it is possible to display 60Hz or 120Hz through various image signal processing in the DTV receiver, but the original signal itself has a limit of 30Hz.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems and to provide a DTV broadcasting of a higher picture quality by directly using a dual stream system for 3D broadcasting.

Transmitting and receiving method and apparatus for providing high-definition digital broadcasting

A dual stream based 3DTV broadcasting system can provide a digital broadcasting service that has twice the image quality of the current DTV broadcasting service without any modification, thereby enabling viewers to receive a further improved high-definition DTV service.

The drawings are illustrative of the concept of the present invention.

In the 3D mode, the reference image is encoded by the first encoder, the additional image is encoded by the second encoder, and in the 2D mode, the odd (even) frame of the high definition image frame (ex, 60 fps) (Odd) frame is encoded by the second encoder so that the 3DTV currently being sold operates like a 3D mode. If the shutter glass is not worn or the polarizing glass is not worn, The image quality can be watched.

In addition, while maintaining the encoder applied in dual stream based 3DTV broadcasting, it provides high quality DTV broadcasting service to viewers in 2D broadcasting.

The present invention is applied not only to an independent dual encoder applied to provide a 3DTV service but also to an encoder such as MVC (Multi-View Coding).

In an embodiment, when 3D broadcasting is applied using MVC, the left and right images are encoded into 50i or 60i, and odd (even) and even (odd) By inputting, 3DTV can watch video with twice the image quality than existing DTV.

The following tables are a partial excerpt from ATSC A104 and ISO / IEC 13818-1: 2013.

4.6.1 PSI
4.6.1.1 stream_type
The base view of SCHC service shall be signaled using stream_type value 0x02 and the additional
view of SCHC service shall be signaled using stream_type value 0x23 as defined in [9].
4.6.1.2 Program and Program Element Descriptors
The Stereoscopic_program_info_descriptor () and Stereoscopic_video_info_descriptor () as specified in [9]
shall be used in signaling of SCHC program. ATSCA / 104: 2012 3D-TV Terrestrial Broadcasting, Part 2 26 December 2012
10
4.6.1.2.1 Stereoscopic_program_info_descriptor
Stereoscopic_program_info_descriptor () as specified in [9]
program_info_length field in the PMT to signal the existence of an SCHC program. For SCHC
service, the stereoscopic_service_type shall be set to '011'.
The stereoscopic_service_type can be set to '001' to indicate that the base view and the
additional view video elementary streams of the SCHC program are carried the same video.
4.6.1.2.2 Stereoscopic_video_info_descriptor
Stereoscopic_video_info_descriptor () as specified in [9]
ES_info_length field in the PMT to identify the view component of an SCHC program; ie, the base
view video stream and the additional view video stream.
The values of horizontal_upsampling_factor and vertical_upsampling_factor shall be used to signal the
up-sampling factor of the additional view video.

Value Description 0x00 ITU-T | ISO / IEC Reserved 0x01 ISO / IEC 11172-2 Video 0x02 Rec. ITU-T H.262 | ISO / IEC 13818-2 Video or ISO / IEC 11172-2 constrained parameter video stream (see note 1) 0x03 ISO / IEC 11172-3 Audio 0x04 ISO / IEC 13818-3 Audio 0x05 Rec. ITU-T H.222.0 | ISO / IEC 13818-1 private_sections 0x06 Rec. ITU-T H.222.0 | ISO / IEC 13818-1 PES packets containing private data 0x07 ISO / IEC 13522 MHEG 0x08 Rec. ITU-T H.222.0 | ISO / IEC 13818-1 Annex A DSM-CC 0x09 Rec. ITU-T H.222.1 0x0A ISO / IEC 13818-6 type A 0x0B ISO / IEC 13818-6 type B 0x0C ISO / IEC 13818-6 type C 0x0D ISO / IEC 13818-6 type D 0x0E Rec. ITU-T H.222.0 | ISO / IEC 13818-1 auxiliary 0x0F ISO / IEC 13818-7 Audio with ADTS transport syntax 0x10 ISO / IEC 14496-2 Visual 0x11 ISO / IEC 14496-3 Audio with the LATM transport syntax as defined in ISO / IEC 14496-3 0x12 ISO / IEC 14496-1 SL-packetized stream or FlexMux stream carried in PES packets 0x13 ISO / IEC 14496-1 SL-packetized stream or FlexMux stream carried in ISO / IEC 14496_sections 0x14 ISO / IEC 13818-6 Synchronized Download Protocol 0x15 Metadata carried in PES packets 0x16 Metadata carried in metadata_sections 0x17 Metadata carried in ISO / IEC 13818-6 Data Carousel 0x18 Metadata carried in ISO / IEC 13818-6 Object Carousel 0x19 Metadata carried in ISO / IEC 13818-6 Synchronized Download Protocol 0x1A IPMP stream (defined in ISO / IEC 13818-11, MPEG-2 IPMP) 0x1B AVC video stream conforming to one or more profiles defined in Annex A of Rec. ITU-T H.264 | ISO / IEC 14496-10 or AVC video sub-bitstream as defined in 2.1.78 or MVC base view sub-bitstream as defined in 2.1.85 or AVC video sub-bitstream of MVC as defined in 2.1.88 0x1C ISO / IEC 14496-3 Audio, without using any additional transport syntax, such as DST, ALS and SLS 0x1D ISO / IEC 14496-17 Text 0x1E Auxiliary video stream as defined in ISO / IEC 23002-3 0x1F SVC video sub-bitstream of an AVC video stream conforming to one or more profiles defined in Annex G of Rec. ITU-T H.264 | ISO / IEC 14496-10 0x20 MVC video sub-bitstream of an AVC video stream conforming to one or more profiles defined in Annex H of Rec. ITU-T H.264 | ISO / IEC 14496-10 0x21 Video stream conforming to one or more profiles as defined in Rec. ITU-T T.800 | ISO / IEC 15444-1 0x22 Additional view Rec. ITU-T H.262 | ISO / IEC 13818-2 video stream for service-compatible stereoscopic 3D services (see note 2 and 3) 0x23 Additional view Rec. ITU-T H.264 | ISO / IEC 14496-10 video stream conforming to one or more profiles defined in Annex A for service-compatible stereoscopic 3D services (see note 2 and 3) 0x24-0x7E Rec . ITU -T H.222.0 | ISO / IEC 13818-1 Reserved 0x7F IPMP stream 0x80-0xFF User Private

Syntax No . of bits Format Stereoscopic_program_info_descriptor () {
descriptor_tag
descriptor_length
reserved
stereoscopic_service_type
}
8
8
5
3
uimsbf
uimsbf
bslbf
bslbf

Syntax No . of bits Format Stereoscopic_video_info_descriptor () {
descriptor_tag
descriptor_length
reserved
base_video_flag
if (base_video_flag) {
reserved
leftview_flag
} else {
reserved
usable_as_2D
horizontal_upsampling_factor
vertical_upsampling_factor
}

}
8
8
7
One

7
One

7
One
4
4
uimsbf
uimsbf
bslbf
bslbf

bslbf
bslbf

bslbf
bslbf
bslbf
bslbf

In the ATSC A104 standard, the stream type is defined as 0x02 (MPEG-2) for the reference image and 0x23 (MPEG-4 AVC / H.264) for the additional image in accordance with ISO / IEC 13818-1: 2013, and the stereoscopic_program_info_descriptor And stereoscopic_video_info_descriptor are used to identify 3D related information. At this time, in the case of the high-definition DTV of the present invention, the high-definition DTV is broadcasted using the first and second encoders of the drawing without changing the existing ATSC A104 standard, and the receiver receives the stream transmitted in the conventional 3D scheme, The service can be played back. In other words, the high-definition DTV is broadcasted without changing the first and second encoders or otherwise, and the receiver decodes the two streams encoded by the first and second encoders so that the viewer can view the high-definition DTV.