WO2007037618A1 - Appareil pour transmettre et pour recevoir une diffusion multimedia numerique pour un service video de haute qualite - Google Patents

Appareil pour transmettre et pour recevoir une diffusion multimedia numerique pour un service video de haute qualite Download PDF

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Publication number
WO2007037618A1
WO2007037618A1 PCT/KR2006/003845 KR2006003845W WO2007037618A1 WO 2007037618 A1 WO2007037618 A1 WO 2007037618A1 KR 2006003845 W KR2006003845 W KR 2006003845W WO 2007037618 A1 WO2007037618 A1 WO 2007037618A1
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WIPO (PCT)
Prior art keywords
stream
enhancement layer
base layer
symbol
transport stream
Prior art date
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PCT/KR2006/003845
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English (en)
Inventor
Jong-Soo Lim
Hyun Lee
Gwang-Soon Lee
Soo-In Lee
Chieteuk Ahn
Original Assignee
Electronics And Telecommunications Research Institute
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.)
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Publication date
Priority claimed from KR1020060065109A external-priority patent/KR100721539B1/ko
Application filed by Electronics And Telecommunications Research Institute filed Critical Electronics And Telecommunications Research Institute
Priority to EP06798928A priority Critical patent/EP1938596A4/fr
Publication of WO2007037618A1 publication Critical patent/WO2007037618A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H60/00—Arrangements for broadcast applications with a direct linking to broadcast information or broadcast space-time; Broadcast-related systems
    • H04H60/02—Arrangements for generating broadcast information; Arrangements for generating broadcast-related information with a direct linking to broadcast information or to broadcast space-time; Arrangements for simultaneous generation of broadcast information and broadcast-related information
    • H04H60/07—Arrangements for generating broadcast information; Arrangements for generating broadcast-related information with a direct linking to broadcast information or to broadcast space-time; Arrangements for simultaneous generation of broadcast information and broadcast-related information characterised by processes or methods for the generation
    • 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
    • H04N21/234—Processing of video elementary streams, e.g. splicing of video streams or manipulating encoded video stream scene graphs
    • H04N21/2343—Processing of video elementary streams, e.g. splicing of video streams or manipulating encoded video stream scene graphs involving reformatting operations of video signals for distribution or compliance with end-user requests or end-user device requirements
    • H04N21/234327—Processing of video elementary streams, e.g. splicing of video streams or manipulating encoded video stream scene graphs involving reformatting operations of video signals for distribution or compliance with end-user requests or end-user device requirements by decomposing into layers, e.g. base layer and one or more enhancement layers
    • 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
    • H04N21/2383—Channel coding or modulation of digital bit-stream, e.g. QPSK modulation
    • 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
    • H04N21/438—Interfacing the downstream path of the transmission network originating from a server, e.g. retrieving encoded video stream packets from an IP network
    • H04N21/4382—Demodulation or channel decoding, e.g. QPSK demodulation
    • 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
    • H04N21/45—Management operations performed by the client for facilitating the reception of or the interaction with the content or administrating data related to the end-user or to the client device itself, e.g. learning user preferences for recommending movies, resolving scheduling conflicts
    • H04N21/462—Content or additional data management, e.g. creating a master electronic program guide from data received from the Internet and a Head-end, controlling the complexity of a video stream by scaling the resolution or bit-rate based on the client capabilities
    • H04N21/4621—Controlling the complexity of the content stream or additional data, e.g. lowering the resolution or bit-rate of the video stream for a mobile client with a small screen
    • 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]
    • H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client 
    • H04N21/61—Network physical structure; Signal processing
    • H04N21/6106—Network physical structure; Signal processing specially adapted to the downstream path of the transmission network
    • H04N21/6131—Network physical structure; Signal processing specially adapted to the downstream path of the transmission network involving transmission via a mobile phone network
    • 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]
    • H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client 
    • H04N21/63—Control signaling related to video distribution between client, server and network components; Network processes for video distribution between server and clients or between remote clients, e.g. transmitting basic layer and enhancement layers over different transmission paths, setting up a peer-to-peer communication via Internet between remote STB's; Communication protocols; Addressing
    • H04N21/631—Multimode Transmission, e.g. transmitting basic layers and enhancement layers of the content over different transmission paths or transmitting with different error corrections, different keys or with different transmission protocols
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H2201/00—Aspects of broadcast communication
    • H04H2201/10—Aspects of broadcast communication characterised by the type of broadcast system
    • H04H2201/20—Aspects of broadcast communication characterised by the type of broadcast system digital audio broadcasting [DAB]

Definitions

  • the present invention relates to a Digital Multimedia Broadcasting (DMB) transmitting/receiving apparatus for a high-quality video service; and, more particularly, to a DMB transmitting/receiving apparatus that can provide a high-quality video service or an additional service while maintaining inverse compatibility with a conventional DMB system.
  • DMB Digital Multimedia Broadcasting
  • FIG. 1 is a block view illustrating a conventional digital multimedia broadcasting
  • the conventional DMB transmitting apparatus includes a
  • Moving Picture Experts Group 4 MPEG-4
  • MPEG-4 audio encoder 113 MPEG-4 system encoder 120
  • MPEG-2 transport stream TS
  • RS Reed-Solomon
  • DVB Digital Audio Broadcasting
  • the MPEG-4 video encoder 111 and the MPEG-4 audio encoder 113 encode video and audio sources.
  • the MPEG- 4 system encoder 120 objectizes and synchronizes media streams, and the MPEG-2 TS multiplexer 130 multiplexes the media streams.
  • the RS encoder 140 is used as an external encoder for additional error correction encoding
  • the convolutional interleaver 150 is used as an external interleaver to remove temporal correlation between adjacent byte units in data stream.
  • the DAB transmitter 160 receives streams outputted from the convolutional interleaver 150 through a stream mode channel, converts the streams into digital broadcasting signals, and outputs the digital broadcasting signals.
  • Fig. 2 is a block view describing a digital audio broadcasting (DAB) transmitter of DAB
  • Fig. 1 The drawing shows a structure of a Eureka-147 DAB system, which is a European DAB system.
  • the DAB transmitter 160 used in the conventional DMB transmitting apparatus includes an energy dispersal scrambler 161, a convolutional encoder 162, a time interleaver 163, a symbol mapper 164, a frequency interleaver 165, a differential modulator 166, an Inverse Fast Fourier Transform (IFFT) 167, and a guard interval inserter 168.
  • an energy dispersal scrambler 161 a convolutional encoder 162
  • a time interleaver 163 a symbol mapper 164
  • a frequency interleaver 165 includes a differential modulator 166, an Inverse Fast Fourier Transform (IFFT) 167, and a guard interval inserter 168.
  • IFFT Inverse Fast Fourier Transform
  • MPEG-encoded audio data stream or general data stream inputted to the DAB transmitter 160 are inputted to the energy dispersal scrambler 161 to disperse energy of radio frequency (RF) transmitting signals, and inputted to the convolutional encoder 162 to be convolution-encoded into different encoding rates according to Unequal Error Protection (UEP) or Equal Error Protection (EEP) profile.
  • RF radio frequency
  • Each sub-channel data temporally interleaved in the time interleaver 163 with respect to a section of 16 logic frames is multiplexed in a main service multiplexer (MSM) to thereby form a common interleaved frame (CIF).
  • MSM main service multiplexer
  • CIF common interleaved frame
  • each logic frame since each logic frame includes 24ms information in a time domain, it has an interleaving depth of a total of 384ms.
  • QPSK symbol mapping is performed by forming a sync channel, a fast information channel (FIC), and a main service channel (MSC) for transmitting valid data to compose a 24ms-long DAB transmitting frame in the symbol mapper 164, and frequency interleaving is performed in the frequency interleaver 165 to minimize the influence regarding frequency selective fading.
  • FIC fast information channel
  • MSC main service channel
  • the differential demodulator 166 generates a phase reference signal and disposes the phase reference signal in a second symbol of a transmission frame, and performs a differential modulation onto an orthogonal frequency division multiplexing (OFDM) symbol that constitutes a fast information channel (FIC) and a main service channel (MSC) based on the transmission frame.
  • OFDM orthogonal frequency division multiplexing
  • the OFDM symbols that form the transmission frame go through zero-padding for 2N Inverse Fast Fourier Transform (IFFT) and the zero-padded OFDM symbols of the transmission frame are converted into time domain signals through an IFFT in the IFFT unit 167.
  • IFFT Inverse Fast Fourier Transform
  • the guard interval inserter 168 inserts data disposed in about a fourth of a valid symbol section in the rear part, which is called a guard interval, into a place before the valid symbols to remove inter-symbol interference (ISI).
  • ISI inter-symbol interference
  • the available transmission rate is 1.152Mbps when a convolutional encoding having a 1/2 rate encoding rate is applied.
  • a transmission rate of 576 kbps is assigned to each service.
  • the conventional DMB transmitting apparatus has a limitation in providing a high-quality service, even though a highly efficient source encoding is applied and a transmission rate of 776kbps is provided. [17]
  • DMB Multimedia Broadcasting
  • a source encoder for performing source encoding onto audio signals and video signals into base layer streams and enhancement layer streams, individually; a base layer transmission processor for receiving the base layer streams from the source encoder, performing system encoding, multiplexing encoded base layer streams into transport streams, and outputting base layer transport streams; an enhancement layer transmission processor for receiving the enhancement layer streams from the source encoder, performing system encoding, multiplexing the encoded enhancement layer streams into enhancement layer transport streams, and outputting enhancement layer transport streams; and a layered digital broadcasting transmitter for receiving the base layer transport streams and the enhancement layer transport streams from the base layer transmission processor and the enhancement layer transmission processor, and modulating the base and enhancement layer transport streams into digital broadcasting signals.
  • a source encoder for performing source encoding onto audio signals and video signals into base layer streams and enhancement layer streams, individually
  • a base layer transmission processor for receiving the base layer streams from the source encoder, performing system encoding, multiplexing encoded base layer streams into transport streams, and outputting base layer transport streams
  • DMB transmitting apparatus for an additional data service, which includes: an additional data source encoder for source-encoding additional data and outputting enhancement layer stream; a base layer source encoder for source-encoding audio signals and video signals and outputting base layer stream; a base layer transmission processor for receiving the base layer stream, performing system encoding, multiplexing encoded base layer stream into transport stream, and outputting base layer transport stream; an enhancement layer transmission processor for receiving the enhancement layer stream, performing system encoding, multiplexing encoded enhancement layer stream into media stream, and outputting enhancement layer transport stream; and a layered digital broadcasting transmitter for receiving the base layer transport streams and the enhancement layer transport streams from the base layer transmission processor and the enhancement layer transmission processor, and modulating the base and enhancement layer transport streams into digital broadcasting signals.
  • DMB receiving apparatus for a high-quality video service, which includes: a digital broadcasting receiver for receiving digital broadcasting signals, separating the digital broadcasting signals into base layer stream and enhancement layer stream, outputting the enhancement layer stream, and demodulating the base layer stream through symbol de-mapping and outputting the demodulated base layer stream; a base layer reception processor for performing channel decoding onto the demodulated base layer stream to thereby produce transport stream, de-multiplexing the transport stream, performing system decoding, and outputting base layer audio stream and base layer video stream; an enhancement layer reception processor for receiving the enhancement layer stream, demodulating the enhancement layer stream through symbol de-mapping, performing channel decoding to thereby produce transport stream, de-multiplexing the transport stream, performing system decoding, and outputting enhancement layer audio stream and enhancement layer video stream; and a scalable audio/video decoder for performing scalable decoding onto the base layer audio stream, the base layer video stream, the enhancement layer audio stream, and the enhancement layer video stream.
  • DMB receiving apparatus for an additional data service, which includes: a digital broadcasting receiver for receiving digital broadcasting signals, separating the digital broadcasting signals into base layer stream and enhancement layer stream, outputting the enhancement layer stream, and demodulating the base layer stream through symbol de-mapping and outputting the demodulated base layer stream; a base layer reception processor for performing channel decoding onto the demodulated base layer stream to thereby produce transport stream, de-multiplexing the transport stream, performing system decoding, and outputting base layer audio stream and base layer video stream; an enhancement layer reception processor for receiving the enhancement layer stream, demodulating the enhancement layer stream through symbol de-mapping, performing channel decoding to thereby produce additional data; an audio/video decoder for decoding and outputting the base layer audio stream and the base layer video stream; and an additional data decoder for decoding and outputting the additional data. [26]
  • the present invention provides a high-quality video service and an additional data service while maintaining compatibility with conventional digital multimedia broadcasting networks.
  • the present invention provides a high-quality video service with a higher available transmission rate than conventional DMB systems and simultaneously provides more broadcasting service channels by adding a layered modulation function to a conventional DMB transmitting system.
  • FIG. 1 is a block view illustrating a conventional digital multimedia broadcasting
  • Fig. 2 is a block view describing a digital audio broadcasting (DAB) transmitter of DMB
  • Fig. 1 is a block view showing a DMB transmitting apparatus for a high-quality video service in accordance with an embodiment of the present invention
  • Fig. 4 is a block view illustrating an enhancement layer transmission processor of
  • FIG. 3 is a detailed block view describing the enhancement layer transmission processor of Fig. 3;
  • FIG. 6 is a block view illustrating a layered DAB transmitter of Fig. 3;
  • Fig. 7 shows a constellation of a IA Quadrature Phase Shift Keying (QPSK) signal
  • Fig. 8 shows a constellation of a signal having one-bit additional information and symbol-mapped in a 2- ASK modulation method in layered symbol mapping in accordance with an embodiment of the present invention
  • Fig. 9 shows a constellation of a signal having two-bit additional information and symbol-mapped in a QPSK modulation method in layered symbol mapping in accordance with an embodiment of the present invention
  • Fig. 10 is a block view describing a DMB transmitting apparatus for an additional data service in accordance with an embodiment of the present invention
  • Fig. 11 is a block view illustrating a DMB receiving apparatus for a high-quality video service in accordance with an embodiment of the present invention
  • Fig. 12 is a block view describing a DAB receiver of Fig. 11 ;
  • Fig. 13 is a flowchart describing a DMB receiving process for a high-quality video service in accordance with an embodiment of the present invention.
  • FIG. 14 is a block view showing a DMB receiving apparatus for an additional data service in accordance with an embodiment of the present invention.
  • block diagrams of the present invention should be understood to show a conceptual viewpoint of an exemplary circuit that embodies the principles of the present invention.
  • all the flowcharts, state conversion diagrams, pseudo codes and the like can be expressed substantially in a computer-readable media, and whether or not a computer or a processor is described distinctively, they should be understood to express various processes operated by a computer or a processor.
  • Functions of various devices illustrated in the drawings including a functional block expressed as a processor or a similar concept can be provided not only by using hardware dedicated to the functions, but also by using hardware capable of running proper software for the functions.
  • a function When a function is provided by a processor, the function may be provided by a single dedicated processor, single shared processor, or a plurality of individual processors, part of which can be shared.
  • FIG. 3 is a block view showing a DMB transmitting apparatus for a high-quality video service in accordance with an embodiment of the present invention.
  • the DMB transmitting apparatus includes a Moving Picture
  • MPEG-4 scalable video encoder 211
  • MPEG-4 scalable audio encoder 213
  • an enhancement layer transmission processor 220 an enhancement layer transmission processor 220
  • a base layer transmission processor 230 a base layer transmission processor 230
  • DAB Digital Audio Broadcasting
  • the MPEG-4 scalable video encoder 211 generates base layer video stream, which is compatible with conventional DMB systems, and enhancement layer video stream for an improved quality out of a video source, and outputs the base layer video stream and the enhancement layer video stream to the base layer transmission processor 230 and the enhancement layer transmission processor 220, respectively.
  • the MPEG-4 scalable audio encoder 213 generates base layer audio stream, which is compatible with conventional DMB systems, and enhancement layer audio stream for an improved quality out of an audio source, and outputs the base layer audio stream and the enhancement layer audio stream to the base layer transmission processor 230 and the enhancement layer transmission processor 220, respectively.
  • the enhancement layer video stream and the enhancement layer audio stream can be generated by using diverse scalable techniques such as time scalability, space scalability, and signal-to-noise ratio (SNR) scalability. Since the scalable techniques are widely known to those skilled in the art to which the present invention pertains, detailed description on them will not be provided herein.
  • a conventional DMB standard document ETSI EN 300 401 may be referred to as a background art of the present invention in connection with the embodiments of the present invention.
  • ETSI EN 300 401 may be referred to as a background art of the present invention in connection with the embodiments of the present invention.
  • the base layer transmission processor 230 processes base layer video stream and base layer audio stream supported by conventional DMB systems.
  • the MPEG-4 system encoder 120 objectizes the base layer video stream and the base layer audio stream, which are transmitted from the MPEG-4 scalable video encoder 211 and the MPEG-4 audio scalable encoder 213, respectively, and synchronizes the base layer video and audio streams with each other.
  • the MPEG-2 TS multiplexer 130 multiplexes the base layer video and audio streams into base layer transport stream, and the RS encoder 140 performs error correction coding onto the base layer transport stream.
  • the convolutional interleaver 150 removes time correlation among adjacent byte units within stream and outputs the result to the layered DAB transmitter 240.
  • the layered DAB transmitter 240 includes a layered symbol mapper for processing both base layer stream and enhancement layer stream in addition to the structure of the above-described conventional DAB transmitter.
  • the layered DAB transmitter 240 will be described in detail with reference to Fig. 6.
  • Fig. 5 is a detailed block view describing the enhancement layer transmission processor 220 of Fig. 3.
  • the enhancement layer transmission processor 220 includes an MPEG-4 system encoder 221, an MPEG-2 TS multiplexer 222, an energy dispersal scrambler 223, a channel encoder 224, and a time interleaver 225.
  • the MPEG-4 system encoder 221 objectizes the enhancement layer video stream and the enhancement layer audio stream, synchronizes the streams, and outputs the synchronized streams to the MPEG-2 TS multiplexer 222.
  • the MPEG-2 TS multiplexer 222 multiplexes the enhancement layer video stream and the enhancement layer audio stream, which are transmitted from the MPEG-4 system encoder 221 into enhancement layer transport stream and outputs the enhancement layer transport stream.
  • the energy dispersal scrambler 223 receives the enhancement layer transport stream and performs energy dispersal of a transmitting signal onto the received enhancement layer transport stream.
  • the energy dispersal may be performed based on a dispersal polynomial expression of the aforementioned standard document ETSI EN 300401.
  • the channel encoder 224 receives the energy dispersed enhancement layer transport stream and encodes a wireless communication channel to have a robust error correction function. Examples of the error correcting channel coding include RS coding, con- volutional coding, Low Density Parity Check (LDPC) coding, turbo coding, and concatenated coding method thereof.
  • the error correcting channel coding is performed by using a Rate Compatible Punctured Code (RCPC) that can provide variable channel coding rates or a structure capable of changing the coding rate of a channel code.
  • RCPC Rate Compatible Punctured Code
  • Fig. 6 is a block view illustrating the layered DAB transmitter 240 of Fig. 3.
  • the layered DAB transmitter 240 includes the layered symbol mapper 241 in addition to the structure of the conventional DAB transmitter, which is described above with reference to Fig. 2.
  • the layered DAB transmitter 240 includes the layered symbol mapper 241 between the differential modulator 166 and the Inverse Fast Fourier Transform (IFFT) unit 167 in addition to the constituent elements of the conventional DAB transmitter, which includes the energy dispersal scrambler 161, the convolutional encoder 162, the time interleaver 163, the symbol mapper 164, the frequency interleaver 165, the differential modulator 166, the IFFT 167, and the guard interval inserter 168.
  • the layered symbol mapper which is newly suggested in the present invention, will be described among the constituent elements of the layered DAB transmitter 240.
  • the conventional constituent elements will not be described herein.
  • L denotes the number of OFDM symbols
  • K denotes the number of multi- carriers
  • z h ,, k is generated in a phase reference symbol generator (not shown).
  • Equation 1 signifies that each carrier is modulated in a ⁇ /4 QPSK modulation method. Therefore,
  • z is any one between
  • Fig. 7 shows a constellation of a IA QPSK signal.
  • OFDM of an enhancement layer transport stream is defined as z e ⁇ , k
  • Z l ,k of the layered symbol mapper 241 can be defined as Equation 2.
  • the layered symbol mapper 241 when the additional information of the enhancement layer is 1 bit and a 2-ASK modulation is used, the layered symbol mapper 241 can be designed as the following Equation 3.
  • Fig. 8 shows a constellation of a signal having one-bit additional information and symbol-mapped in a 2-ASK modulation method in layered symbol mapping in accordance with an embodiment of the present invention.
  • the constellation shown as black dots in Fig. 4 is a constellation for symbol-mapped signals of the base layer, whereas the constellation shown as white dots is a constellation for symbol-mapped signals of the enhancement layer.
  • a layered symbol mapping function is as shown in Table 1 below, when the additional information of the enhancement layer is two bits and QPSK modulation is used.
  • Table 1 A constellation of symbol mapped signals based on the Table 1 is presented in Fig. 9.
  • B denotes information bit corresponding to
  • layered symbol mapping constellations can be extended in a similar method based on the base layer information and the enhancement layer information.
  • the enhancement layer is supposed to be applied to only a channel through which data are actually transmitted, i.e., MSC, in the structure of a DMB frame.
  • MSC data-specific carrier
  • FlC a channel which provide system information.
  • information on layered modulation such as whether layer modulation is used, a modulation method used when layer information is used, encoding rate of a channel encoder, and service information related to an enhancement layer, may be transmitted through the FlC so that a DMB receiving apparatus receives information on the enhancement layer.
  • Fig. 10 is a block view describing a DMB transmitting apparatus for an additional data service in accordance with an embodiment of the present invention.
  • An enhancement layer may be used as an additional transmission channel for providing an additional service, other than the aforementioned purpose of providing a high-quality service.
  • an additional video service may be provided by using an additional source encoder for the enhancement layer.
  • the additional video service may be related to the base layer, such as stereoscopic video and multi- viewpoint video, or it may be independent and different service.
  • the DMB transmitting apparatus for providing an additional data service includes an additional data source encoder 115, an enhancement layer transmission processor 220, an MPEG-4 video encoder 111, an MPEG-4 audio encoder 113, a base layer transmission processor 230, and a layered DAB transmitter 240.
  • the base layer reception processor 320 is the same constituent element as a conventional DMB receiver and it includes a convolutional decoder 321, an RS decoder 322, a TS de-multiplexer 323, and an MPEG-4 system decoder 324.
  • the enhancement layer reception processor 330 includes a layered symbol de-mapper 331, a time de- interleaver 332, a channel decoder 333, an energy dispersal de-scrambler 334, a TS demultiplexer 335, and an MPEG-4 system decoder 336.
  • the enhancement layer reception processor 330 decodes base layer signals and enhancement layer signals through a process in reverse to the encoding process in the above-described DMB transmitting apparatus for a high-quality video service.
  • the DAB receiver 310 is a Eureka 147 DAB receiving apparatus including an RF tuner 311, an AD converter 312, an FFT 313, a differential demodulator 314, a frequency de-interleaver 315, a symbol de-mapper 316, a time de- interleaver 317, a convolutional decoder 318, and an energy dispersal de-scrambler 319.
  • the DAB receiver 310 receives broadcasting signals and extracts information for diverse services and data streams through a process in reverse to a process in the above-described DAB transmitter.
  • the frequency de-interleaver 315 of the DAB receiver 310 separates base layer stream and enhancement layer stream.
  • the base layer stream is channel- decoded in the same process as a conventional DMB receiver, and the enhancement layer stream is outputted to the enhancement layer reception processor 330 and channel-decoded through the layered symbol de-mapper 331, the time de-interleaver 332, the channel decoder 333, and the energy dispersal de-scrambler 334.
  • the channel-decoded streams of the two layers are separated into video, audio, and diverse additional information packets in the TS de-multiplexers 323 and 335 and extracted as video and audio streams of the two layers through de-packetization and synchronization between the streams in the MPEG-4 system decoders 324 and 336.
  • the DMB receiving apparatus of the present invention receives broadcasting signals transmitted from a conventional DMB system, it extracts only the base layer stream and provides basic-quality video and audio through the same decoding process of the conventional DMB receiving system.
  • Fig. 13 is a flowchart describing a DMB receiving process for a high-quality video service in accordance with an embodiment of the present invention.
  • a Eureka-147 DAB receiving apparatus receives broadcasting signals.
  • step S 120 diverse multiplexing and service information transmitted through an FIC of a transmission frame are analyzed.
  • step S 130 information related to a broadcasting channel, multiplexing, and other information related to the service are extracted to acquire broadcasting channel information.
  • FIG. 14 is a block view showing a DMB receiving apparatus for an additional data service in accordance with an embodiment of the present invention.
  • the DMB receiving apparatus includes a DAB receiver 310, a base layer receiving processor 320, an enhancement layer receiving processor 330, an MPEG-4 video decoder 410, an MPEG-4 audio decoder 420, and an additional data decoder 430.
  • the DAB receiver 310, the base layer receiving processor 320, and the enhancement layer receiving processor 330 are the same as described above with reference to Figs. 11 and 12. If any, the enhancement layer receiving processor 330 receives enhancement layer stream and finally outputs additional data, and the TS demultiplexer 335 and the MPEG-4 system decoder 336 may not be provided according to the kind of the additional data.
  • the MPEG-4 video decoder 410 and the MPEG-4 audio decoder 420 receives base layer video stream and base layer audio stream, which are outputted from the base layer reception processor, performs decoding onto the base layer video and audio streams, and outputs decoded base layer streams.
  • the additional data decoder 330 receives the additional data from the enhancement layer reception processor 330, performs decoding according to the kind of the additional data, and outputs decoded additional data. [127]
  • the present application contains subject matter related to Korean patent application

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  • Signal Processing (AREA)
  • Multimedia (AREA)
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  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)

Abstract

L'invention concerne un appareil d'émission/réception de diffusion multimédia numérique (DMB). Cet appareil DMB destiné à un service vidéo de haute qualité comprend: un codeur source pour décoder des signaux audio et vidéo de codage source pour obtenir des flux de couche de base et des flux de couche d'amélioration, individuellement: un processeur de transmission de couche de base pour recevoir les flux de couche de base provenant du codeur source, pour effectuer un codage du système, pour multiplexer des flux de couche de base codés pour obtenir des flux de transport, et pour produire des flux de transport de couche de base; un processeur de transmission de couche d'amélioration pour recevoir les flux de couche d'amélioration provenant du codeur source, pour effectuer un codage de système, pour multiplexer les flux de couche d'amélioration codés pour obtenir des flux de transport de couche d'amélioration, et pour produire des flux de transport de couche d'amélioration; et un émetteur de diffusion numérique en couches pour recevoir les flux de transport de couche de base et les flux de transport de couche d'amélioration provenant du processeur de transmission de couche de base et du processeur de transmission de couche d'amélioration, et pour moduler les flux de transport de couche de base et les flux de transport de couche d'amélioration pour obtenir des signaux de diffusion numériques.
PCT/KR2006/003845 2005-09-27 2006-09-27 Appareil pour transmettre et pour recevoir une diffusion multimedia numerique pour un service video de haute qualite WO2007037618A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP06798928A EP1938596A4 (fr) 2005-09-27 2006-09-27 Appareil pour transmettre et pour recevoir une diffusion multimedia numerique pour un service video de haute qualite

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
KR10-2005-0090067 2005-09-27
KR20050090067 2005-09-27
KR10-2006-0065109 2006-07-11
KR1020060065109A KR100721539B1 (ko) 2005-09-27 2006-07-11 고품질 비디오 서비스를 위한 디지털 멀티미디어 방송송/수신 장치

Publications (1)

Publication Number Publication Date
WO2007037618A1 true WO2007037618A1 (fr) 2007-04-05

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PCT/KR2006/003845 WO2007037618A1 (fr) 2005-09-27 2006-09-27 Appareil pour transmettre et pour recevoir une diffusion multimedia numerique pour un service video de haute qualite

Country Status (2)

Country Link
EP (1) EP1938596A4 (fr)
WO (1) WO2007037618A1 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2100450A1 (fr) * 2006-12-06 2009-09-16 Electronics and Telecommunications Research Institute Appareil et procédé pour service de diffusion multimédia numérique
EP2145478A1 (fr) * 2007-05-02 2010-01-20 Electronics and Telecommunications Research Institute Appareil pour codage de canal pour couche d'amélioration d'un émetteur de radiodiffusion multimédia numérique, système émetteur de radiodiffusion multimédia numérique, système récepteur de radiodiffusion multimédia numérique et expansion-mise en forme de
EP2181534A1 (fr) * 2007-07-19 2010-05-05 Electronics and Telecommunications Research Institute Procédé et dispositif de modulation hiérarchique
EP2316225A2 (fr) * 2008-08-14 2011-05-04 Electronics and Telecommunications Research Institute Appareil d'émission et de réception de diffusion multimédia numérique et procédé correspondant
EP2346192A1 (fr) * 2009-11-30 2011-07-20 Electronics and Telecommunications Research Institute Appareil et procédé de réception de signal
CN103079073A (zh) * 2013-01-16 2013-05-01 南京邮电大学 正交频分多址接入系统中面向可伸缩视频的资源分配方法
EP2345242A4 (fr) * 2008-10-07 2015-08-05 Korea Electronics Telecomm Procede d'emission et de réception et dispositif de fourniture de services de diffusion à acces conditionnel
EP2160896A4 (fr) * 2007-06-20 2017-01-18 Electronics and Telecommunications Research Institute Procédé et appareil de transmission de signaux de radiodiffusion numérique, et procédé et appareil de réception de signaux de radiodiffusion numérique

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US6510177B1 (en) * 2000-03-24 2003-01-21 Microsoft Corporation System and method for layered video coding enhancement
WO2005020576A1 (fr) * 2003-08-20 2005-03-03 Electronics And Telecommunications Research Institute Systeme et procede de radiodiffusion multimedia numerique

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CA2226489C (fr) * 1992-03-26 2001-07-24 Matsushita Electric Industrial Co., Ltd. Systeme de communication

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US6510177B1 (en) * 2000-03-24 2003-01-21 Microsoft Corporation System and method for layered video coding enhancement
US20020080887A1 (en) * 2000-10-20 2002-06-27 Young-Ho Jeong In-band adjacent-channel digital audio broadcasting system
WO2005020576A1 (fr) * 2003-08-20 2005-03-03 Electronics And Telecommunications Research Institute Systeme et procede de radiodiffusion multimedia numerique

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See also references of EP1938596A4 *

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2100450A1 (fr) * 2006-12-06 2009-09-16 Electronics and Telecommunications Research Institute Appareil et procédé pour service de diffusion multimédia numérique
EP2100450A4 (fr) * 2006-12-06 2012-02-29 Korea Electronics Telecomm Appareil et procédé pour service de diffusion multimédia numérique
EP2145478A1 (fr) * 2007-05-02 2010-01-20 Electronics and Telecommunications Research Institute Appareil pour codage de canal pour couche d'amélioration d'un émetteur de radiodiffusion multimédia numérique, système émetteur de radiodiffusion multimédia numérique, système récepteur de radiodiffusion multimédia numérique et expansion-mise en forme de
EP2145478A4 (fr) * 2007-05-02 2013-05-29 Korea Electronics Telecomm Appareil pour codage de canal pour couche d'amélioration d'un émetteur de radiodiffusion multimédia numérique, système émetteur de radiodiffusion multimédia numérique, système récepteur de radiodiffusion multimédia numérique et expansion-mise en forme de
EP2160896A4 (fr) * 2007-06-20 2017-01-18 Electronics and Telecommunications Research Institute Procédé et appareil de transmission de signaux de radiodiffusion numérique, et procédé et appareil de réception de signaux de radiodiffusion numérique
EP2181534A1 (fr) * 2007-07-19 2010-05-05 Electronics and Telecommunications Research Institute Procédé et dispositif de modulation hiérarchique
EP2181534A4 (fr) * 2007-07-19 2012-03-07 Korea Electronics Telecomm Procédé et dispositif de modulation hiérarchique
EP2316225A2 (fr) * 2008-08-14 2011-05-04 Electronics and Telecommunications Research Institute Appareil d'émission et de réception de diffusion multimédia numérique et procédé correspondant
EP2316225A4 (fr) * 2008-08-14 2012-02-22 Korea Electronics Telecomm Appareil d'émission et de réception de diffusion multimédia numérique et procédé correspondant
EP2345242A4 (fr) * 2008-10-07 2015-08-05 Korea Electronics Telecomm Procede d'emission et de réception et dispositif de fourniture de services de diffusion à acces conditionnel
EP2346192A1 (fr) * 2009-11-30 2011-07-20 Electronics and Telecommunications Research Institute Appareil et procédé de réception de signal
CN103079073A (zh) * 2013-01-16 2013-05-01 南京邮电大学 正交频分多址接入系统中面向可伸缩视频的资源分配方法

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