Classifications

• • 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
• • 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
  • H04N21/23424—Processing of video elementary streams, e.g. splicing of video streams or manipulating encoded video stream scene graphs involving splicing one content stream with another content stream, e.g. for inserting or substituting an advertisement
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
  • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
  • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
  • H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
  • H04N21/236—Assembling of a multiplex stream, e.g. transport stream, by combining a video stream with other content or additional data, e.g. inserting a URL [Uniform Resource Locator] into a video stream, multiplexing software data into a video stream; Remultiplexing of multiplex streams; Insertion of stuffing bits into the multiplex stream, e.g. to obtain a constant bit-rate; Assembling of a packetised elementary stream
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
  • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
  • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
  • H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
  • H04N21/236—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
  • H04N21/2383—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
  • H04N21/434—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
  • H04N21/4347—Demultiplexing 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]
  • H04N21/40—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
  • H04N21/44—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs
  • H04N21/44016—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs involving splicing one content stream with another content stream, e.g. for substituting a video clip

Definitions

• the present invention relates to an apparatus for splicing a terrestrial DMB video signal, and more particular to an apparatus for splicing a terrestrial DMB video signal to constantly provide an uninterrupted broadcasting service although a program is inserted and transmitted while another program is transmitting in a terrestrial DMB transmitting system.
• An Eureka- 147 based digital audio broadcasting (DAB) transmitting system is developed to process and transmit audio data or small amount of data because an object of the Eureka- 147 based DAB transmitting system is digitalization of analog audio broadcasting.
• DMB terrestrial digital multimedia broadcasting
• ETSI European Telecommunications Standards Institute
• Fig. 1 is a block diagram illustrating the conceptual architecture of the DMB video multiplexer.
• FIG.1 The conceptual architecture of the DMB video multiplexer is shown in Fig.1 includes an IOD generator 101, an OD/BIFS generator 102, an MPEG-4 video encoder 103, an MPEG-4 audio encoder 104, a SL (Sync layer) packetizer 106, an additional data block 105, a section generator 107, a PES (Packetizer Elementary Stream) packetizer 108, a TS (transport stream) multiplexer 109 and an outer-encoder 110. That is stated in the ETSI TS (Technical Specification) 102 428 as follows.
• ETSI TS Technical Specification
• the IOD generator 101 creates IODs that comply with the ISO/IEC 14496-1.
• OD/BIFS generator 102 creates OD/BIFS streams that comply with the ISO/IEC 14496-1.
• the MPEG-4 video encoder 103 generates an encoded bitstream compliant with the ISO/IEC 14496-10.
• the MPEG-4 audio encoder 104 generates an encoded bitstream compliant with the ISO/IEC 14496-3.
• the additional data block 105 is selectively used only when auxiliary information is transported or synchronized interactive services are provided.
• the SL packetizer 106 generates a SL packet stream, compliant with ISO/IEC 14496-1.
• the section generator 107 creates sections compliant with ISO/IEC 13818-1 for the input IOD/OD/BIFS.
• the PES packetizer 108 generates a PES packet stream compliant with ISO/IEC 13818-1 for SL packet Stream.
• the TS multiplexer 109 combines the input sections and PES packet streams into a single MPEG-2 TS complying with ISO/IEC 13818-1.
• the outer-encoder 110 generates RS (Reed-Solomon) encodes for error correction to the packet in the MPEG- 2 TS multiplexed data stream and the RS encoded data stream is convolutional interleaved.
• MSC Mobile Channel
• a terrestrial DMB transmitting system generates an ensemble signal of the Eureka-
• the general digital broadcasting system including the terrestrial DMB transmitting system may not provide an uninterrupted broadcasting service when a current broadcasting digital signal inputted from a first broadcasting signal source is spliced with a new broadcasting digital signal inputted from a second broadcasting signal source while transmitting the current broadcasting digital signal from the first broadcasting source differently from a conventional analog broadcasting system.
• the broadcasting digital signals from the first and the second broadcasting digital signal source are decoded to broadcasting analog signals, the broadcasting analog signals are spliced, the spliced broadcasting analog signal is encoded to a broadcasting digital signal again, and then the encoded digital signal is transmitted. Therefore, high-cost encoding equipment is required to encode and decode the digital broadcasting signals, and an image quality is degraded by the decoding and the encoding process.
• an apparatus for splicing a terrestrial digital multimedia broadcasting (DMB) signal including: a first media data (not outer-encoded DMB video TS) analyzing and correcting unit for analyzing a first media data which is a current broadcasted MPEG transport stream (TS), extracting first splicing information required for splicing, and correcting the first media data to be proper to a MPEG system standard after splicing; a second media data analyzing and correcting unit for analyzing a second media data, which is a MPEG TS to be inserted through splicing, extracting second splicing information required for splicing, and correcting the second media data to be proper to a MPEG system standard after splicing; and a stream multiplexing unit for selecting a stream of the corrected second media data to be inserted through splicing at a time of splicing while transmitting streams of the corrected first media data, and outputting the selected stream.
• a first media data not outer-encoded DMB video
• An apparatus for splicing a terrestrial DMB signal provides an uninterrupted broadcasting service when a terrestrial DMB transmitting system inserts and transmits a local broadcasting program or a commercial program while re-transmitting a central broadcasting program.
• the apparatus for splicing a terrestrial DMB signal according to the present invention does not require expensive encoding equipments and prevents degradation of image quality since the apparatus according to the present invention dose not require to encode digital broadcasting signals to analog broadcasting signals for splicing and to decode the spliced analog broadcasting signal to the digital broadcasting signal for transmitting.
• Fig. 1 is a block diagram illustrating the conceptual architecture of the DMB video multiplexer
• FIG. 2 is a block diagram showing an apparatus for splicing a terrestrial DMB signal in accordance with a preferred embodiment of the present invention.
• An apparatus for splicing a terrestrial DMB broadcasting signal splices a digital ensemble signal or a digital DMB signal in MPEG-2 TS layer in a terrestrial DMB transmitting system using an Eureka- 147 based DAB transmitting scheme.
• FIG. 2 is a block diagram showing an apparatus for splicing a terrestrial DMB signal in accordance with a preferred embodiment of the present invention.
• the apparatus for splicing a terrestrial DMB signal includes ensemble data analyzing units 201, 211 for receiving ensemble data and analyzing the received ensemble data; outer-decoding units 202 and 212 for outer-decoding media data of a sub-channel in order to use the outer-decoded data for splicing in the inputted ensemble data frame; media data analyzing and correcting unit 203, 213 for analyzing outer-decoded MPEG-2 TS media data and correcting the outer-decoded MPEG-2 TS media data to be proper to MPEG-2 and MPEG-4 system standard after splicing; buffers 204, 214 for storing and reading media data; a stream multiplexing unit 205 for selecting one of a current transmitting stream or a new stream to be transmitted and outputting the selected stream; an outer- encoding unit 206 for outer-encoding the spliced media data; an ensemble data composing unit 207 for composing an ensemble data to be suitable to an Eureka
• MPEG-2 TS media data or Eureka- 147 ensemble signal may be used as an input signal.
• an input signal B is spliced and broadcasted while broadcasting an input signal A, where the input signal A denotes media data A or ensemble data A and the input signal B also denotes media data B or ensemble data B.
• the ensemble data analyzing unit 201 or 211 receives ensemble data, analyzes the ensemble data frame, isolates media data of a sub channel to be used for splicing, and outputs the isolated media data to the outer-decoding unit 202 or 212.
• the outer decoding unit 202 or 212 outer-decodes the isolated media data, and outputs outer-decoded media data to the corresponding media data analyzing and correcting unit 203 or 213.
• a convolution de-interleaver scheme or a reed Solomon decoding scheme may be used.
• the media data analyzing and correcting unit 203 or 213 receives media data from an external unit or the outer-decoding unit 202 or 212, analyzes the received media data, extracts predetermined information for splicing, and corrects the media data to be suitable to MPEG-2 and MPEG-4 system standard after splicing. That is, the media data analyzing and correcting unit 203 or 213 manages stream data not to be cut off in a payload unit at a splicing boundary portion, and corrects the media data to have a consistency in program identifier allocation per an elementary stream, time information PCR, OCR, DTS, CTS, and continuity counter between a previous transmitted stream and a new stream.
• the media data analyzing and correcting unit obtains program specific information
• PSI program association table
• PMT program map table
• the PSI includes PID composing information of each ESs such as BIFS, OD, video and audio.
• the media data analyzing and correcting unit corrects the inputted stream to have a consistency.
• the media data analyzing and correcting unit manages TS packets having a same PID according to a payload unit not to be cut off in a payload unit.
• the TS packets may be composed PAT, PMT, BIFS, OD, video ES and audio ES.
• the media data analyzing and correcting unit 203 or 213 corrects TS packets by orderly selecting a TS packet having "1" as a playload_unit_start_indicator from the TS packets and stores the corrected TS packets in a buffer or reads the TS packets by orderly selecting a TS packet having "1" as a playload_unit_start_indicator from the TS packets and corrects the read TS packets.
• the media data analyzing and correcting unit corrects the spliced media data to have a consistency between a continuity_counter value of previous transmitted stream and the same of current transmitting stream. That is, the media data analyzing and correcting unit corrects the continuity_counter value in the TS packets having a same PID to be increased from 0 to 15 repeatedly.
• the media data analyzing and correcting unit analyzes an adaptation_field, and corrects the adaptation_filed to have a consistency when there is a valid program clock reference (PCR). Also, there is information about a time of splicing, the splicing is performed using a splice_countdown value.
• the splice_countdown value denotes the number of TS packets having the same PID remained until the splicing is performed. The splicing is performed on TS packets having a same PID right after a TS packet having "0" as the splice_countdown a value.
• the media data analyzing and correcting unit corrects parameter values in a SL packet header to have a consistency between a previous transmitted stream and a current transmitting stream.
• the parameter values in the SL packet header may be an OCR, a DTS and a CTS.
• the time of splicing may be decided to use a splicing time information in the adaptation_field or a predetermined method set by broadcasting service providers or broadcasting equipments.
• the media data analyzing and correcting unit manages stream data not to be cur off in a payload unit at a boundary portion around the time of splicing and manages the buffer not to be overflowed.
• the stream multiplexing unit 205 substitutes a previous transmitted stream with a new stream inputted from other stream source and outputs the substituted stream by considering the above described conditions.
• a stream stored in the buffer 204 is corrected to be proper to MPEG-2 and MPEG-4 system standards through the media data analyzing and correcting unit 203.
• stream stored in the buffer 214 is corrected to be proper to MPEG-2 and MPEG-4 system standard through the media data analyzing and correcting unit 213, and the corrected media data is used as input data in the stream multiplexing unit 205.
• the video stream must be transmitted from an I screen.
• the I screen of the stream must be stored in the buffer 214 at first before using the steam for broadcasting, and all previous streams are eliminated after starting to store new I screen in the buffer 214.
• a Null packet is eliminated and then the data is stored. Also, if an amount data stored in the buffer 204 is insufficient, a Null packet is generated and outputted to an external device or the outer-encoding unit 206.
• the outer-encoding unit 206 receives the spliced media data from the stream multiplexing unit 205, performs the outer-encoding on the spliced media data and outputs the outer-encoded data to the ensemble data composing unit 207.
• the ensemble data composing unit 207 receives the spliced media data from the outer-encoding unit 206, composing ensemble data to be suitable to the Eureka- 147 standard and outputs the ensemble data. Also, the ensemble data composing unit 207 receives data of other sub channel and fast information channel (FIC) information excepting the spliced media data from the ensemble data analyzing unit 201 or 211, and composing ensemble data with the media data from the outer-encoding unit 206.
• FIC fast information channel
• the ensemble data composing unit 207 uses the buffer 208 storing FIC information and sub-channel data to compose the ensemble data.
• the ensemble data composing unit 207 manages the buffer not to be overflowed, and composes the ensemble frame to be suitable to the Eureka- 147 standard and outputs the ensemble frame.
• the stream multiplexing unit 205 reads data stored in the buffers 204, 214 or generates Null packets when an amount of data stored in the buffer 208 is insufficient, and outputs one of the read data or the generated Null packet to the outer-encoding unit 206.
• the above described method according to the present invention can be embodied as a program and stored on a computer readable recording medium.
• the computer readable recording medium is any data storage device that can store data which can be thereafter read by the computer system.
• the computer readable recording medium includes a read-only memory (ROM), a random-access memory (RAM), a CD-ROM, a floppy disk, a hard disk and an optical magnetic disk.

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• Engineering & Computer Science (AREA)
• Multimedia (AREA)
• Signal Processing (AREA)
• Business, Economics & Management (AREA)
• Marketing (AREA)
• Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
• Television Systems (AREA)

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• 2004
  • 2004-12-10 KR KR1020040104471A patent/KR100789365B1/ko not_active IP Right Cessation
• 2005
  • 2005-09-28 EP EP05856392A patent/EP1820340A4/de not_active Ceased
  • 2005-09-28 WO PCT/KR2005/003219 patent/WO2006080660A1/en active Application Filing
  • 2005-09-28 CN CN2005800479960A patent/CN101116334B/zh not_active Expired - Fee Related

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