EP1751979A1 - Vorrichtung und verfahren zum senden/empfangen eines stereoskopischen digitalen 3d-ausstrahlungssignals durch verwendung von zusätzlichen stereoskopischen 3d-videodaten - Google Patents

Vorrichtung und verfahren zum senden/empfangen eines stereoskopischen digitalen 3d-ausstrahlungssignals durch verwendung von zusätzlichen stereoskopischen 3d-videodaten

Info

Publication number
EP1751979A1
EP1751979A1 EP04808260A EP04808260A EP1751979A1 EP 1751979 A1 EP1751979 A1 EP 1751979A1 EP 04808260 A EP04808260 A EP 04808260A EP 04808260 A EP04808260 A EP 04808260A EP 1751979 A1 EP1751979 A1 EP 1751979A1
Authority
EP
European Patent Office
Prior art keywords
video
additional data
information
stereoscopic
psi
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP04808260A
Other languages
English (en)
French (fr)
Other versions
EP1751979A4 (de
Inventor
Suk-Hee Cho
Byung-Jun Bae
Kug-Jin Yun
Chung-Hyun Ahn
Soo-In Lee
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Electronics and Telecommunications Research Institute ETRI
Original Assignee
Electronics and Telecommunications Research Institute ETRI
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Electronics and Telecommunications Research Institute ETRI filed Critical Electronics and Telecommunications Research Institute ETRI
Publication of EP1751979A1 publication Critical patent/EP1751979A1/de
Publication of EP1751979A4 publication Critical patent/EP1751979A4/de
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • H04N19/597—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using predictive coding specially adapted for multi-view video sequence encoding
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/08—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N13/00—Stereoscopic video systems; Multi-view video systems; Details thereof
    • H04N13/10—Processing, recording or transmission of stereoscopic or multi-view image signals
    • H04N13/106—Processing image signals
    • H04N13/172—Processing image signals image signals comprising non-image signal components, e.g. headers or format information
    • H04N13/178—Metadata, e.g. disparity information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N13/00—Stereoscopic video systems; Multi-view video systems; Details thereof
    • H04N13/10—Processing, recording or transmission of stereoscopic or multi-view image signals
    • H04N13/194—Transmission of image signals
    • 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
    • H04N21/235—Processing of additional data, e.g. scrambling of additional data or processing content descriptors
    • 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
    • H04N21/23614—Multiplexing of additional data and video streams
    • 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
    • H04N21/2365—Multiplexing of several video streams
    • 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
    • H04N21/238—Interfacing the downstream path of the transmission network, e.g. adapting the transmission rate of a video stream to network bandwidth; Processing of multiplex streams
    • H04N21/2389—Multiplex stream processing, e.g. multiplex stream encrypting
    • 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
    • H04N21/4348—Demultiplexing of additional data and video streams
    • 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
    • H04N21/435—Processing of additional data, e.g. decrypting of additional data, reconstructing software from modules extracted from the transport stream

Definitions

  • the present invention relates to an apparatus and method for transmitting/receiving a three-dimensional (3D) stereoscopic digital broadcast signal by using 3D stereoscopic video additional data; and, more particularly, to a 3D stereoscopic digital broadcast transmitting/ receiving apparatus and method that is compatible with a two- dimensional (2D) digital broadcasting system by defining and processing 3D stereoscopic video additional data as an additional stream added to a 2D video transport stream, which is different from a conventional method that provides a 3D stereoscopic digital broadcasting system by using a video of another viewpoint.
  • the 3D stereoscopic video additional data include a video of another viewpoint, disparity information and depth information.
  • a digital broadcasting using Moving Picture Experts Group (MPEG) technology can transmit high-definition programs in the same bandwidth of a conventional analog broadcasting and transmit a plurality of standard-definition programs in one channel.
  • the digital broadcasting can provide diverse application services, e.g., data broadcasting, interactive broadcasting and the like.
  • MPEG-2 transport streams (TSs) generated from service providers should be multiplexed into one channel.
  • PID packet identifier
  • Data required to generate a 3D stereoscopic video are a video of two viewpoints, a video of one viewpoint and disparity information, or a video of one viewpoint and depth information. Disclosure of Invention Technical Problem
  • an object of the present invention to provide an apparatus and method for transmitting/ receiving three-dimensional (3D) stereoscopic digital broadcast by using 3D stereoscopic video additional data.
  • the apparatus and method is compatible with a two-dimensional (2D) digital broadcast system by defining and processing the 3D stereoscopic video additional data, e.g., a video of another viewpoint, disparity information and/or depth information, as an additional stream synchronized with 2D video transport stream (TS) differently from conventional methods that support a 3D stereoscopic digital broadcasting system by using the video of another viewpoint.
  • a 3D stereoscopic digital broadcast transmitting apparatus using 3D stereoscopic video additional data including: a video acquiring unit for acquiring an original video and 3D stereoscopic video additional data; an audio data acquiring unit for acquiring audio data; an encoding unit for encoding the original video and 3D stereoscopic video additional data transmitted from the video acquiring unit and the audio data transmitted from the audio data acquiring unit; a program specific information (PSI) generating unit for generating PSI for discriminating each information; a packetizing unit for generating packetized elementary stream (PES) by receiving and packetizing elementary streams (ESs) obtained from the encoding in the encoding unit; a transport stream (TS) generating unit for generating transport streams by receiving the PES from the packetizing unit and the PSI from the PSI generating unit; a miltiplexing unit for rmltiplexing the transport streams transmitted from the TS generating unit into one transmission stream; and
  • PSI program specific information
  • a 3D stereoscopic digital broadcast receiving apparatus using 3D stereoscopic video additional data including: a demodulating unit for demodulating a modulated signal by receiving a modulated transport stream; a demultiplexing unit for demiltiplexing the demodulated transport stream by receiving the demodulated transport stream from the demodulating unit and program specific information from a PSI analyzing unit so as to produce transport streams; the PSI analyzing unit for analyzing PSI by receiving a transport stream (TS_PSI) for PSI from the demultiplexing unit and transmitting the analyzed PSI to the demiltiplexing unit; a TS analyzing unit for analyzing the transport streams by receiving the demiltiplexed transport streams from the demultiplexing unit so as to generate PES; a depacketizing unit for depacketizing the PES transmitted from the TS analyzing unit so as to generate elementary streams; a decoding unit for decoding the elementary streams transmitted from the
  • a method for transmitting a 3D stereoscopic digital broadcast by using 3D stereoscopic video additional data including the steps of: a) acquiring an original video, 3D stereoscopic video additional data and audio data; b) encoding the original video, the 3D stereoscopic video additional data and the audio data into a format appropriate for digital transmission to thereby generate elementary streams; c) generating packetized elementary stream by packetizing the elementary streams; d) generating program specific information for discriminating each information, such as the original video, the 3D stereoscopic video additional data, and the audio data; e) generating transport streams based on the packetized elementary streams and the program specific information; f) miltiplexing the transport streams into one transport stream; and g) modulating and transmitting the miltiplexed transport stream.
  • a method for receiving a 3D stereoscopic digital broadcast by using 3D stereoscopic video additional data including the steps of: a) demodulating a modulated signal by receiving a modulated transport stream; b) demultiplexing a transport stream (TS_PSI) for program specific information based on packet identifier (PID); c) analyzing the program specific information based on a transport stream (TS_PSI) for program specific information; d) demiltiplexing a transport stream into transport streams based on the analyzed program specific information; e) generating a packetized elementary stream by analyzing the demiltiplexed transport streams; f) generating elementary streams by depacketizing the PES; g) decoding the depacketized elementary streams; h) generating a 3D stereoscopic video by combining the decoded original video and the decoded 3D stereoscopic video additional data; and i) outputting
  • Fig. 1 is a block diagram illustrating a three-dimensional (3D) stereoscopic digital broadcast transmitting apparatus using 3D stereoscopic video additional data in accordance with an embodiment of the present invention
  • Fig. 2 is a syntax diagram of a packetized elementary stream (PES) in accordance with an embodiment of the present invention
  • Fig. 3 is a diagram describing a 3D stereoscopic video type (3D_video_type) added to discriminate 3D stereoscopic video additional data in accordance with the present invention
  • Fig. 3 is a diagram describing a 3D stereoscopic video type (3D_video_type) added to discriminate 3D stereoscopic video additional data in accordance with the present invention
  • Fig. 4 is a syntax diagram of a transport stream (TS) having Program Association Table (PAT) information in accordance with an embodiment of the present invention
  • Fig. 5 is a syntax diagram of a transport stream having Program Map Table (PMT) information in accordance with an embodiment of the present invention
  • PMT Program Map Table
  • Fig. 6 is a syntax diagram of a transport stream packet in accordance with an embodiment of the present invention
  • Fig. 7 is a block diagram showing a 3D stereoscopic digital broadcast receiving apparatus using 3D stereoscopic video additional data in accordance with an embodiment of the present invention
  • Fig. 7 is a block diagram showing a 3D stereoscopic digital broadcast receiving apparatus using 3D stereoscopic video additional data in accordance with an embodiment of the present invention
  • FIG. 8 is a flowchart describing a 3D stereoscopic digital broadcast transmitting method using 3D stereoscopic video additional data in accordance with an embodiment of the present invention.
  • Fig. 9 is a flowchart describing a 3D stereoscopic digital broadcast receiving method using 3D stereoscopic video additional data in accordance with an embodiment of the present invention. Best Mode for Carrying Out the Invention
  • Fig. 1 is a block diagram illustrating a three-dimensional (3D) stereoscopic digital broadcast transmitting apparatus using 3D stereoscopic video additional data in accordance with an embodiment of the present invention.
  • the 3D stereoscopic digital broadcast transmitting apparatus of the present invention includes a video acquiring unit 110, an audio acquiring unit 120, an encoding unit 130, a program specific information (PSI) generating unit 140, a packetizing unit 150, a transport stream (TS) generating unit 160, a miltiplexing unit 170 and a modulating unit 18Q
  • the video acquiring unit 110 acquires an original video and 3D stereoscopic video additional data.
  • the audio acquiring unit 120 acquires audio data.
  • the encoding unit 130 receives the original video and 3D stereoscopic video additional data from the video acquiring unit 110 and receives the audio data from the audio acquiring unit 120 and encodes them into a form appropriate for digital transmission.
  • the PSI generating unit 140 generates PSI for identifying data.
  • the packetizing unit 150 generates packetized elementary stream (PES) by receiving elementary streams (ES) obtained from the encoding in the encoding unit 130 and packetizing them.
  • the TS generating unit 160 generates transport streams by receiving PES from the packetizing unit 150 and receiving PSI from the PSI generating unit 14Q
  • the miltiplexing unit 170 receives transport streams from the TS generating unit 160 and miltiplexes them into one transport stream.
  • the modulating unit 180 modulates the transport stream multiplexed in the miltiplexing unit 170
  • the video acquiring unit 110 acquires a monocular video for generating an original video and one or more among a video of another viewpoint, disparity information, and depth information to generate 3D stereoscopic video additional data.
  • the video of one viewpoint for generating an original video, which is acquired through the video acquiring unit 110 is a reference video to be compared with a video of another viewpoint.
  • the video of another viewpoint which is acquired from the video acquiring unit 110 and used for the generation of the 3D stereoscopic video additional data, is a video having a viewpoint or a plurality of viewpoints which is/are different from the viewpoint of the original video.
  • the disparity information which is used to generate the 3D stereoscopic video additional data, is distance information between two locations where the same object is taken from different viewpoints, when the videos of milti- viewpoints or two videos each obtained from one viewpoint and from the other viewpoint are projected into one video.
  • the depth information is far-and-near information that can be figured out by acquiring a video of another viewpoint for the same object in a predetermined distance from the video of another viewpoint.
  • the encoding unit 130 includes a first Moving Picture Experts Group (MPEG)-2 encoder 131, an arbitrary encoder 132, which will be referred to as an X encoder, and a second MPEG-2 encoder 133.
  • the first MPEG-2 encoder 131 receives the original video of a reference viewpoint from the video acquiring unit 110 and encodes the original video based on the MPEG-2 which is the current broadcasting standard.
  • the X encoder 132 encodes the 3D stereoscopic video additional data transmitted from the video acquiring unit 110 efficiently.
  • the second MPEG-2 encoder 133 encodes the audio data transmitted from the audio acquiring unit 120 into a format of the MPEG-2, which is the current broadcasting standard.
  • the PSI generating unit 140 generates PSI for discriminating the original video, the 3D stereoscopic video additional data and the audio data.
  • the PSI generating unit 140 uses a stream type (streamjype) defined in the video and audio of the conventional digital broadcasting without change and newly defines a stream type (streamjype) for 3D stereoscopic video additional data as a value defined as 'reserved' or 'user private' in the PID information of a Program Map Table (PMT) for discriminating transport streams for the compatibility between the 2D digital broadcasting system and the 3D stereoscopic digital broadcasting system.
  • stream type streamjype
  • PMT Program Map Table
  • the packetizing unit 150 includes a first packetizer 151, a second packetizer 152 and a third packetizer 153.
  • the first packetizer 151 generates packetized elementary stream (PES_Ori) for the original video by packetizing an elementary stream (ES_Ori) for the original video, which is transmitted from the encoding unit 13Q
  • the second packetizer 152 generates PES (PES_3D) for 3D stereoscopic video additional data by packetizing an ES (ES_Ori) for the 3D stereoscopic video additional data, which is transmitted from the encoding unit 13Q
  • the third packetizer 153 generates PES (PES_Au) for audio data by packetizing an ES (ES_Au) for the audio data, which is transmitted from the encoding unit 13Q
  • the packetizing unit 150 fiirther performs a fiinction of additionally defining an input field for the type of 3D stereoscopic video additional data in a header of ES (ES_3D) for 3D stereoscopic video additional data to discriminate a video of another viewpoint, disparity information and depth information, when a new input field is needed in connection with the 3D stereoscopic video additional data.
  • ES_3D ES-3D
  • the TS generating unit 160 includes a first TS generator 161, a second TS generator 162, a third TS generator 163 and a fourth TS generator 164.
  • the first TS generator 161 generates a transport stream (TS_Ori) for the original image by receiving a PES (PES_Ori) for the original image from the packetizing unit 150.
  • PES PES_Ori
  • the second TS generator 162 generates a transport stream packet (TS_3D) for a 3D stereoscopic video additional data by receiving a PES (PES_3D) for the 3D stereoscopic video additional data from the packetizing unit 150
  • the third TS generator 163 generates a transport stream packet (TS_Au) for audio data by receiving a PES (PES_Au) for the audio data from the packetizing unit 150
  • the fourth TS generator 164 generates a transport stream packet (TS_PSI) for PSI by receiving a PSI from the PSI generating unit 14Q
  • the miltiplexing unit 170 adds Program Clock Reference (PCR) to a transport stream (TS_Ori) for the original video to use it for the detection of system time in the last process of miltiplexing.
  • PCR Program Clock Reference
  • TS_Ori transport stream
  • Fig. 2 is a syntax diagram of a packetized elementary stream in accordance with an embodiment of the present invention.
  • the PES generated in the packetizing unit 150 of Fig. 1 follows the structure of MPEG-2 system standard (International Organization for Standardization (ISO)/International Electrotechnical Committee (IEC) 13818-1) and it is defined in the header of a PES when there is a new input field required in connection with 3D stereoscopic video additional data.
  • ISO International Organization for Standardization
  • IEC International Electrotechnical Committee
  • an input field for the type of 3D stereoscopic video additional data is defined additionally to discriminate the 3D stereoscopic video additional data, e.g., video of another viewpoint, disparity information, and depth information.
  • FIG. 3 is a diagram describing an architecture for discriminating information of 3D stereoscopic video in the header of a PES in accordance with the present invention.
  • an information type for discriminating the kind of 3D stereoscopic video additional data is added by utilizing a PES extension field data space in the header of the conventional PES of Fig. 2, when a PES is generated in the packetizing unit 150 of Fig. 1.
  • a 2-bit 3D stereoscopic video additional data type (3D_video_type) can be defined additionally by using PES extension field data.
  • Table 1 presents the types of 3D stereoscopic video additional data.
  • a value indicating a 3D stereoscopic video additional data type should be defined in the PES extension field data in advance.
  • a value "00” signifies disparity information and a value “10” stands for a video of another viewpoint, while a value “11” denotes 'reserved.'
  • the PSI generating unit 140 generates PSI including four tables: Program Association Table (PAT), Program Map Table (PMT), Network Information Table (NIT) and Conditional Access Table (CAT).
  • the PSI is inserted to a payload of a TS packet and transmitted repeatedly within a predetermined time period for initialization in a receiver.
  • the above-mentioned tables are discriminated by different PID values and one TS packet carries only one kind of table.
  • Table 2 shows definitions for PID values of PSI. [47] Table 2 PID of PSI and description
  • a PID value of a section "0x00010 ⁇ OxlFFE" can be established arbitrarily and used, and the value and meaning of the established PID should be defined in the program map table in advance. Accordingly, the program map table establishes a PID of a transport stream and defines descriptions with respect to 3D stereoscopic video additional data additionally as well as establishing the PID of a transport stream used in the conventional digital broadcasting and defining description.
  • the PID "0x0000” denotes a Program Association Table (PAT); the PID “0x0001,” Conditional Access Table (CAT); the PID “0x0002,” a TS Description Table; the section “0x0003 ⁇ OxOOOF,” 'reserved'; the section “0x00010 ⁇ OxlFFE,” an arbitrary PID that can be established arbitrarily; and the PID "OxlFFF,” a null packet.
  • PAT Program Association Table
  • CAT Conditional Access Table
  • CAT Conditional Access Table
  • FIG. 4 is a syntax diagram of a TS having PAT information in accordance with an embodiment of the present invention.
  • the transport stream having PAT information follows the MPEG-2 System Standard (ISO/IEC 13818-1). It defines information on a program, e.g., a program number and a PID, which indicates what programs a transport stream is formed of in the PAT. That is, it includes a network ID (network_PID) for each program number (Program_number 0, 1, 2,..., i) and a PID (program_map_PID) for a Program Map Table.
  • network_PID network_PID
  • program_map_PID program_map_PID
  • 3D stereoscopic video additional data have one program number and has a PID (program_map_PID) for one program map table.
  • Fig. 5 is a syntax diagram of a TS having PMT information in accordance with an embodiment of the present invention.
  • the TS having PMT information follows a structure of the MPEG-2 System Standard (ISO/IEC 13818-1), and the PMT includes contents and PID for an elementary stream included in one program. That is, it includes a stream type (streamjype) of each information for a program, an elementary PID (elementary J°ID) of a transport stream, the length (ES nfo Jength) of elementary stream information, and a descriptor.
  • the original video, 3D stereoscopic video additional data and audio data are required.
  • the elementary PID (elementary J°ID) and the stream type (streamjype) for each information are included to discriminate each information.
  • the elementary PID denotes a PID value of a transport stream including program elements
  • the stream type denotes the kinds of program elements included in a packet having the PID value of the elementary PID.
  • Table 3 presents an allocation table of stream types standardized currently.
  • MPEG-2 video is defined as "0x02” and MPEG-2 audio is defined as "0x04" to discriminate a stream type (streamjype).
  • stream type for 3D stereoscopic video additional data
  • the 3D stereoscopic video additional data are defined as "0x02" just as 2D video, two video streams come to exist in one program and, thus, an error occurs in the conventional 2D digital receiver.
  • a 3D stereoscopic video additional data stream is defined newly with respect to one of the values defined as reserved or user private in the current standard.
  • Fig. 6 is a syntax diagram of a transport stream packet in accordance with an embodiment of the present invention.
  • packetized elementary streams PESs are generated in the form of a transport (TS) stream packet having a fixed length of 188 bytes and the PES is largely divided into two parts: a TS packet header and a TS packet payload.
  • the TS packet header includes a synchronization byte and a TS packet identifier (PID) which discriminates TS packets.
  • the TS packet payload includes packetized elementary stream for videos, i.e., PES JDri and PES_3D, PES for audio data (PES_Au) and PSI.
  • the packetized elementary streams (PES JDri, PES_3D, and PES_Au) are generated as TS packets based on the constitution of a transport stream of the MPEG-2 System Standard (ISO/IEC 13818-1) illustrated in Fig. 6. Therefore, the TS generating unit 160 of Fig. 1 receives packetized elementary stream (PES JDri) for the original video, packetized elementary stream (PES_3D) for 3D stereoscopic video additional data, and packetized elementary stream (PES_Au) for audio data and generates TS packets by referring to PID values defined in the program map table.
  • PID values defined in the program map table
  • Each TS packet is multiplexed into a single transport stream in the miltiplexing unit 170 of Fig. 1 and modulated into a transmittable form in the modulating unit 18Q
  • PCR program clock reference
  • TS JDri transport stream
  • Fig. 7 is a 3D stereoscopic digital broadcast receiving apparatus using 3D stereoscopic video additional data in accordance with an embodiment of the present invention.
  • the 3D stereoscopic digital broadcast receiving apparatus using 3D stereoscopic video additional data includes a demodulating unit 710, a demiltiplexing unit 720, a PSI analyzing unit 730, a TS analyzing unit 740, a depacketizing unit 750, a decoding unit 760, a video combining unit 770, and an outputting unit 78Q [68]
  • the demodulating unit 710 receives a modulated transport stream and demodulates the modulated signal.
  • the demiltiplexing unit 720 receives the demodulated transport stream from the demodulating unit 710 and PSI from the PSI analyzing unit and de- miltiplexes the one miltiplexed transport stream to thereby divide it into transport streams.
  • the PSI analyzing unit 730 receives a transport stream (TS J°SI) for program specific information from the demultiplexing unit 720, analyzes program specific information, and transmits the analyzed result to the demiltiplexing unit 720
  • the TS analyzing unit 740 receives demiltiplexed transport streams from the demultiplexing unit 720, analyzes the transport streams and generates packetized elementary stream.
  • the depacketizing unit 750 receives the packetized elementary streams from the TS analyzing unit 740 and depacketizes them to thereby generate elementary streams.
  • the decoding unit 760 receives the elementary streams from the depacketizing unit 750 and decodes the elementary streams.
  • the video combining unit 770 receives and combines the original video and the 3D stereoscopic video additional data which are decoded in the decoding unit 760 to thereby generate a 3D stereoscopic video.
  • the outputting unit 780 receives a 2D video or 3D stereoscopic video from the video combining unit 770, outputs it based on a display type selected by the user and receives audio data from the decoding unit 760 and outputs the audio data.
  • the demiltiplexing unit 720 receives a demodulated TS from the demodulating unit 710, first separates a transport stream (TS J°SI) for program specific information, and transmits it to the PSI analyzing unit 730; and receives program specific information that can discriminate each information, e.g., PID information, from the PSI analyzing unit 730 and demiltiplexes it into a transport stream (TS JDri) for the original video, a transport stream (TS_3D) for 3D stereoscopic video additional data, and a transport stream (TS_Au) for audio data.
  • TS JDri transport stream
  • TS_3D transport stream
  • TS_Au transport stream
  • the demultiplexing unit 720 receives miltiplexed transport stream, finds a TS packet having PAT information whose PID value in the header of the transport stream is "0x0000" and transmits the TS packet to the PSI analyzing unit 73Q Subsequently, it receives a program number and a program map PID (program nap J°ID) from the PSI analyzing unit 730, finds out a TS packet having PMT information from the TS, and transmits it to the PSI analyzing unit 73Q Then, the demiltiplexing unit 720 receives a stream type (streamjype) of each elementary stream and elementary PID (elementary J°ID) from the PSI analyzing unit 730 and demiltiplexes them into TS for each data (TS JDri, TS_3D or TS_Au).
  • a stream type streamjype
  • elementary PID elementary J°ID
  • the demultiplexing unit 720 recognizes the 3D stereoscopic video additional data as 'reserved' or 'user private' and only the streams for video and audio are processed. Therefore, it is compatible with the conventional 2D digital broadcasting system and, in case of the 3D stereoscopic digital broadcasting system, it recognizes a newly defined stream type (streamjype) and processes video, audio and 3D stereoscopic video additional data.
  • the demiltiplexing unit 720 restores system clocks based on the PCR of the transport stream (TS JDri) for the original video for the clock synchronization of the transmitter of Fig. 1 and the receiver of Fig. 7.
  • the PSI analyzing unit 730 receives transport stream (TS J°SI) for program specific information from the demultiplexing unit 730, analyzes PAT information and PID information of the PMT, and then outputs PSI for discriminating TSs in the demiltiplexing unit 720 to the demiltiplexing unit 720
  • the PSI analyzing unit receives a TS packet having PAT information from the demultiplexing unit 720, analyzes payload information of the TS packet, and transmits the analyzed result to the demiltiplexing unit 720 Then, it receives a TS packet having PMT information from the demultiplexing unit 720, analyzes payload information of the TS packet, and transmits the analyzed result to the demiltiplexing unit 720
  • the TS analyzing unit 740 includes a first TS analyzer 741, a second TS analyzer 742, and a third TS analyzer 743.
  • the first TS analyzer 741 generates packetized elementary stream (PES JDri) for the original video by receiving a transport stream (TS JDri) for the original video from the demultiplexing unit 720 and analyzing it.
  • the second TS analyzer 742 generates packetized elementary stream (PES_3D) for the 3D stereoscopic video additional data by receiving a transport stream (TS_3D) for the 3D stereoscopic video additional data from the demultiplexing unit 720 and analyzing it.
  • the third TS analyzer 743 generates packetized elementary stream (PES_Au) for audio data by receiving a transport stream (TS_Au) for the audio data from the demultiplexing unit 720 and analyzing it.
  • the depacketizing unit 750 includes a first depacketizer 751, a second depacketizer 752, and a third depacketizer 753.
  • the first depacketizer 751 generates an elementary stream (ES JDri) for the original video by receiving a packetized elementary stream (PES JDri) for the original video from the TS analyzing unit 740 and depacketizing it.
  • the second depacketizer 752 generates an elementary stream (ES_3D) for 3D stereoscopic video additional data by receiving a packetized elementary stream (PES_3D) for the 3D stereoscopic video additional data from the TS analyzing unit 740 and depacketizing it.
  • the third depacketizer 753 generates an elementary stream (ES_Au) for audio data by receiving a packetized elementary stream (PES_Au) for the audio data from the TS analyzing unit 740 and depacketizing it.
  • the second packetizer 752 of the depacketizing unit 750 fiirther performs a fiinction of discriminating each information by analyzing information on the 3D stereoscopic video additional data type, such as a video of another viewpoint, disparity information and depth information, in the header of the packetized elementary stream (PES_3D) for the 3D stereoscopic video additional data.
  • the 3D stereoscopic video additional data type such as a video of another viewpoint, disparity information and depth information
  • the decoding unit 760 includes a first MPEG-2 decoder 761, an arbitrary decoder 762, and a third MPEG-2 decoder 763.
  • the first MPEG-2 decoder 761 receives an elementary stream (ES JDri) for the original video from the depacketizing unit 750 and decodes it into the format of MPEG-2, which is the current broadcasting standard.
  • the arbitrary decoder 762 receives an elementary stream (ES_3D) for 3D stereoscopic video additional data from the depacketizing unit 750 and decodes it efficiently.
  • the third MPEG-2 decoder 763 receives an elementary stream (ES_Au) for audio data from the depacketizing unit750 and decodes it into the format of MPEG-2, which is the current broadcasting standard.
  • the decoding unit 760 performs synchronization based on a PCR to synchronize the decoded elementary stream (ES JDri) for the original video, the decoded elementary stream (ES_3D) for the 3D stereoscopic video additional data, and the decoded elementary stream (ES_Au) for the audio data which are transmitted from the depacketizing unit 750
  • the video combining unit 770 generates a 3D stereoscopic video by receiving the original video and 3D stereoscopic video additional data that are decoded in the decoding unit 760 and performing synchronization. Then, it outputs a 2D video of the original video for 2D display and a 3D stereoscopic video for 3D display to the video display unit 781.
  • the video combining unit 770 synchronizes the original video and the 3D stereoscopic video additional data for generating a 3D stereoscopic video based on the PCR, which is a system clock, and Presentation Time Stamp (PTS) in a PES.
  • PCR which is a system clock, and Presentation Time Stamp (PTS) in a PES.
  • the original video of the 2D video is a video of one viewpoint which becomes a reference to be compared with a video of another viewpoint.
  • the 3D stereoscopic video additional data of the 3D stereoscopic video includes a video of another viewpoint which is different from the viewpoint of the original video or it includes a video of multi- viewpoints which has a plurality of viewpoints, and/or disparity information or depth information.
  • the video combining unit 770 generates a 3D stereoscopic video by applying an appropriate 3D stereoscopic video generating algorithm according to the type of the 3D stereoscopic video additional data, i.e., a video of another viewpoint, disparity information and/or depth information.
  • the outputting unit 780 includes a video displayer 781 for displaying a 2D video or a 3D stereoscopic video that are inputted from the video combining unit 770 and an audio data player 782 for outputting audio data inputted from the decoding unit 760.
  • the outputting unit 780 outputs different information according to the display type selected by the user. If the user selects a 2D display type, it outputs a 2D video through the video displayer 781. If the user selects a 3D display type, it outputs a 3D stereoscopic video through the video displayer 781.
  • FIG. 8 is a flowchart describing a 3D stereoscopic digital broadcast transmitting method using 3D stereoscopic video additional data in accordance with an embodiment of the present invention.
  • step S810 the original video and 3D stereoscopic video additional data are acquired in the video acquiring unit 110 and, at step S820, audio data are acquired in the audio acquiring unit 120
  • step S840 elementary streams are generated in the encoding unit 130 by encoding the original video and the 3D stereoscopic video additional data acquired in the video acquiring unit 110 and the audio data acquired in the audio acquiring unit 120
  • the acquired original video and the 3D stereoscopic video additional data are discriminated.
  • the original video are encoded by using an MPEG-2 encoder, which is a current broadcasting standard and, at step S842, the 3D stereoscopic video additional data are encoded by using an arbitrary encoder for efficient encoding to thereby generate transport streams.
  • the audio data acquired in the audio acquiring unit 120 are encoded by using the MPEG-2, which is the current broadcasting standard, to thereby generate elementary streams for the audio data.
  • step S850 program specific information is generated in the PIS generating unit 140, to discriminate the original video, 3D stereoscopic video additional data, and audio data.
  • step S860 packetized elementary streams are generated in the packetizing unit 150 by packetizing the elementary streams generated from the encoding process.
  • transport streams are generated in the TS generating unit 160 based on the above-generated program specific information and the above- generated packetized elementary streams.
  • step S880 the above-generated transport streams are multiplexed into one transport stream in the miltiplexing unit 170
  • the miltiplexed transport stream is modulated in the modulating unit 180 and transmitted.
  • FIG. 9 is a flowchart describing a 3D stereoscopic digital broadcast receiving method using 3D stereoscopic video additional data in accordance with an embodiment of the present invention.
  • step S 10 the modulated transport stream is received and demodulated in the demodulating unit 71Q
  • the transport stream (TS J°SI) for program specific information is demiltiplexed in the demiltiplexing unit 720 based on PID.
  • the PSI analyzing unit 730 analyzes program specific information based on the transport stream (TS J°SI) for program specific information.
  • the demiltiplexing unit 720 discriminates the transport streams based on the above analyzed program specific information and demiltiplexes them into transport streams.
  • the TS analyzing unit 740 analyzes the transport streams to thereby generate packetized elementary stream.
  • the depacketizing unit 750 depacketizes the above generated packetized elementary streams and generates elementary streams.
  • step S970 the decoding unit 760 decodes the depacketized elementary streams.
  • the first MPEG-2 decoder 761 decodes the elementary stream (ES JDri) for the original video into MPEG-2, which is the current broadcasting standard and, at step S972, the arbitrary decoder 762 decodes the ES for the 3D stereoscopic video additional data efficiently.
  • the second MPEG-2 decoder 761 decodes the elementary stream (ES_Au) for audio data into MPEG-2, which is the current broadcasting standard.
  • step S980 if a video display mode is inputted from the user and 3D is selected, the video combining unit 770 generates 3D stereoscopic video additional data by combining the decoded original video and the 3D stereoscopic video additional data. Otherwise, if 2D is selected, it bypasses original video.
  • the outputting unit 780 outputs a 2D video or 3D video according to the selection of the user along with audio data.
  • the method of the present invention can be embodied as a program and stored in a computer-readable recording medium such as CD-ROM, RAM, ROM, floppy disks, hard disks, magnetooptical disks and the like. Since the process can be easily implemented by those of ordinary skill in the art, it will not be described any firther herein.
  • the present invention can secure compatibility with a 2D digital broadcasting system by defining and processing the 3D stereoscopic video additional data, such as a video of another viewpoint, disparity information or depth information as a transport stream synchronized with a 2D transport stream, which is different from the conventional method that supports only a 3D digital broadcasting system using a video of another viewpoint.
  • the 3D stereoscopic digital broadcast receiver of the present invention can be embodied in a simple manner.

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Library & Information Science (AREA)
  • Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
  • Compression Or Coding Systems Of Tv Signals (AREA)
EP04808260A 2004-05-21 2004-11-30 Vorrichtung und verfahren zum senden/empfangen eines stereoskopischen digitalen 3d-ausstrahlungssignals durch verwendung von zusätzlichen stereoskopischen 3d-videodaten Withdrawn EP1751979A4 (de)

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KR1020040036566A KR100585966B1 (ko) 2004-05-21 2004-05-21 3차원 입체 영상 부가 데이터를 이용한 3차원 입체 디지털방송 송/수신 장치 및 그 방법
PCT/KR2004/003129 WO2005114998A1 (en) 2004-05-21 2004-11-30 Apparatus and method for transmitting/receiving 3d stereoscopic digital broadcast signal by using 3d stereoscopic video additional data

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EP1751979A4 EP1751979A4 (de) 2009-12-23

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