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]
  • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
  • H04N21/41—Structure of client; Structure of client peripherals
  • H04N21/414—Specialised client platforms, e.g. receiver in car or embedded in a mobile appliance
  • H04N21/41422—Specialised client platforms, e.g. receiver in car or embedded in a mobile appliance located in transportation means, e.g. personal vehicle
• • 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
  • H04N21/41—Structure of client; Structure of client peripherals
  • H04N21/426—Internal components of the client ; Characteristics thereof
• • 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
  • H04N21/4402—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 reformatting operations of video signals for household redistribution, storage or real-time display
  • H04N21/440209—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 reformatting operations of video signals for household redistribution, storage or real-time display for formatting on an optical medium, e.g. DVD
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
  • H04N11/00—Colour television systems
  • H04N11/06—Transmission systems characterised by the manner in which the individual colour picture signal components are combined
  • H04N11/20—Conversion of the manner in which the individual colour picture signal components are combined, e.g. conversion of colour television standards

Definitions

• the invention is based on a method for converting a digital compressed video and / or audio transport stream, in particular according to the MPEG-2 standard, as used, for example, in a digital broadcasting system.
• MPEG transcoders are known for converting MPEG transport streams, which disassemble, process and reassemble the MPEG transport stream in another form, for example after modification of control bits or a conversion of the bit rate.
• EP 11 04 198 AI describes such an MPEG transcoder.
• DE 199 08 488 AI discloses a method in which the packets of the desired program are selected from a DVD / MPEG transport stream via the PIDs.
• claims 1 or 5 show a method / device with which it is possible to generate a digital, compressed video and / or audio transport stream, in particular an MPEG-2 transport stream, such as is used, for example, in digital
• DVD Broadcasting systems
• DMB Broadcasting systems
• a terminal device that only has a basic functionality, for example a networked MPEG display, which was originally only used to play back DVD data was designed over a local network ' .
• program-accompanying, in particular program-specific, information or other data describing the content of the transport stream e.g. easily convert DVB service information into a DVD-compatible MPEG-2 program stream.
• the information accompanying the program some of which are known as "private streams" and part of an MPEG-2
• Transport stream or MPEG-2 program stream can differ greatly in their structure.
• DVB compatibility can be achieved here in any case.
• MOST Multimedia buses in motor vehicles
• DMB digital broadcasting systems
• the invention makes it possible to provide the MOST MPEG displays only with the required basic functionality (here DVD-compatible MPEG-2 program stream decoding) and to implement further functionalities in the signal source.
• the format of the MPEG2 program stream resulting from the conversion according to the invention corresponds completely to a program stream output by a networked DVD player.
• DVD playback device DVD player
• the actual source is then only signaled in a higher-level protocol by the identifiers of the individual connected in the network
• the advantage of the method according to the invention lies in particular in the fact that expanding a networked DVD player to transport stream-based content (digital broadcasting) would only mean additional effort on the source side (receiving module), but not on the sink side (MPEG display) , Since there will generally be more sinks (displays) than signal sources (receiver modules) in such a networked system, there is significant potential for cost reduction.
• the program-accompanying information for example MPEG-PSI and DVG-SI, which are part of the received MPEG-2 transport stream, processed in such a way that they can be embedded in the resulting MPEG-2 program stream in a DVD-compatible manner, eg as subpictures. If necessary, the audio and / or video data must also be converted into a format corresponding to the DVD specifications.
• FIG. 1 shows a block diagram of a device for converting an MPEG-2 transport stream
• FIG. 2 shows a block diagram of a menu generator '
• 3 shows a bus with connected devices.
• the method according to the invention is used to convert the digitally compressed video and / or audio transport data stream, in particular according to the MPEG-2 standard, into a DVD-compatible program stream. Both video and / or audio data and program-accompanying, in particular program-describing, data can be converted.
• the conversion is carried out on the basis of the MP ⁇ G-2 system specification by breaking down the MPEG-2 transport stream into individual audio and video PES streams (Packetised Elementary Streams), according to FIG. 1 by means of multiplexer 1, and their subsequent multiplexing using multiplexer 2 into one valid MPEG-2 program stream.
• the audio data contained in the MPEG-2 transport stream can differ in sampling rate, word length and compression algorithm from that of a DVD-typical program stream. Therefore, an additional adaptation stage - format converter 3 - for audio data may be necessary here before the formation of the program stream.
• This audio data like the video data, is processed at the PES packet level.
• the information accompanying the program or describing the program (MPEG-PSI, DVB-SI) in the transport stream is separated by means of the multiplexer 3 and converted in such a way that it can also be multiplexed into the resulting program stream using multiplexer 2 in accordance with the DVD specification.
• MPEG-2 transport streams also contain additional information describing the program.
• An example of such program-describing information is the EPG (Electronic program guide) in DVB transmissions.
• This data originally transmitted in the transport stream must be able to be visualized or processed in a DVD-compatible manner in the display unit in the terminal. This is only possible in a DVD compliant way if it is as
• Presentation Control Information or "Sub-pictures” are multiplexed into the corresponding MPEG-2 program stream.
• this data is converted into a DVD-compatible data stream by a so-called menu generator 4. If program-descriptive information is to be displayed at the user's request, the Menu generator 4 from these DVD-compatible menus and feeds them with the program stream into the network or system.
• the menu generator 4 is also for part of the
• the control of the modules required for the conversion - menu generator 4 and multiplexer 3 - is carried out on the basis of user input (user control information 8) via the control unit 5 and device-specific
• the permitted user inputs are part of the interactions permitted for DVD playback.
• the control unit 5 controls the assemblies 1, 2, 3, 4, 9 and 10.
• a separate signaling channel for controlling the menu generator 4 is advantageously provided from at least one DVD-compatible terminal.
• the menu generator 4 generates two DVD-compatible bit streams 6 and 7, namely a bit stream 6 consisting of bit maps according to the MPEG-2 standard and a further bit stream 7 for playback control, in particular for generating selection menus for the
• FIG. 1 shows yet another multiplexer 9 on the input side, which is provided in particular to separate overhead information, e.g. for the interaction with the multiplexer 2.
• the structure of the menu generator 4 is shown in FIG. 2.
• This menu generator 4 has the task of converting the program-accompanying information contained in an MPEG-2 transport stream into DVD-compatible sub-pictures.
• This is the MPEG-PSI (Program Specific Information), which are present in every MPEG-2 transport stream and around system-specific information of the transport stream source such as DVB-SI (DVB-System Information) or EPG (Electronic Program Guide), which are only used in certain systems and are partly optional.
• MPEG-PSI Program Specific Information
• DVB-SI DVD-System Information
• EPG Electronic Program Guide
• the sub-pictures on a DVD always consist of 16-color bitmaps. These bitmaps must be compressed and packed in sub-picture units.
• the sub-picture units consist of a header and a display control sequence table. This table describes changes in the appearance of the bitmap during the display, e.g. Color and contrast.
• DVD-compliant presentation control information can also be generated. These include, among other things, the highlight information, with which individual parts of the overall picture can be deposited with different colors. This makes it possible to select menus, e.g. for the selection of a specific language or a specific program.
• the highlight information generated is transmitted in a different stream - Private Stream 7 - than the sub-pictures - Private Stream 6.
• the bitmap generator 10 uses the program-accompanying information of the MPEG-2 transport stream, which it receives from the multiplexer 3, to generate bitmaps that are compatible with the MPEG-2 transport stream
• bitmap generator 10 can Generate compatible highlight information (Private Stream 7).
• the RUN length encoder 12 compresses the bitmap in accordance with the DVD specification.
• the sub-picture packer 13 uses the compressed bitmap and the header and a display control sequence table to produce a DVD-compatible sub-picture unit. This is fed into the program stream multiplexer 2 via the private stream 6.
• FIG. 3 shows a bus 14 which is suitable for transmitting multimedia information.
• a digital compressed video and / or audio transport data stream for example an MPEG-2 transport data stream, is supplied from a signal source 16.
• the terminals 15 connected to the bus 14 should at least partially only have a basic functionality, e.g. for receiving DVD compatible MPEG-2 program streams. So that a conversion to a DVD-compatible format is not necessary for each of the terminals 15 connected to the bus, there is a device 17 according to the invention between the signal source 16 and the bus 14, the function and structure of which has been previously discussed.
• a bus it is of course also possible to provide a branched network for supplying the terminals 15.

Landscapes

• Engineering & Computer Science (AREA)
• Multimedia (AREA)
• Signal Processing (AREA)
• Television Signal Processing For Recording (AREA)
• Signal Processing For Digital Recording And Reproducing (AREA)
• Compression Or Coding Systems Of Tv Signals (AREA)
• Time-Division Multiplex Systems (AREA)

Applications Claiming Priority (3)

Publications (1)

Family

ID=7699462

Family Applications (1)

Country Status (5)

Families Citing this family (8)

Family Cites Families (7)

• 2001
  • 2001-09-18 DE DE10146036A patent/DE10146036B4/de not_active Expired - Fee Related
• 2002
  • 2002-07-10 EP EP02762220A patent/EP1433328A1/de not_active Ceased
  • 2002-07-10 US US10/489,995 patent/US20050036757A1/en not_active Abandoned
  • 2002-07-10 JP JP2003531741A patent/JP4210595B2/ja not_active Expired - Fee Related
  • 2002-07-10 WO PCT/DE2002/002571 patent/WO2003028378A1/de not_active Application Discontinuation

Non-Patent Citations (1)

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