DE4435833A1 - Information channel data encoding, transmission, storage and decoding e.g. for HDTV signal - Google Patents
Information channel data encoding, transmission, storage and decoding e.g. for HDTV signalInfo
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- DE4435833A1 DE4435833A1 DE4435833A DE4435833A DE4435833A1 DE 4435833 A1 DE4435833 A1 DE 4435833A1 DE 4435833 A DE4435833 A DE 4435833A DE 4435833 A DE4435833 A DE 4435833A DE 4435833 A1 DE4435833 A1 DE 4435833A1
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- 239000011159 matrix material Substances 0.000 claims abstract description 5
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- 238000012937 correction Methods 0.000 description 3
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- 230000037431 insertion Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 230000011664 signaling Effects 0.000 description 1
Classifications
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- 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
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/10—Digital recording or reproducing
- G11B20/18—Error detection or correction; Testing, e.g. of drop-outs
- G11B20/1833—Error detection or correction; Testing, e.g. of drop-outs by adding special lists or symbols to the coded information
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M13/00—Coding, decoding or code conversion, for error detection or error correction; Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes
- H03M13/35—Unequal or adaptive error protection, e.g. by providing a different level of protection according to significance of source information or by adapting the coding according to the change of transmission channel characteristics
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0078—Avoidance of errors by organising the transmitted data in a format specifically designed to deal with errors, e.g. location
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/02—Channels characterised by the type of signal
- H04L5/06—Channels characterised by the type of signal the signals being represented by different frequencies
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- 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
- H04N21/2362—Generation or processing of Service Information [SI]
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- 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
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- 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
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- 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
- H04N21/4345—Extraction or processing of SI, e.g. extracting service information from an MPEG stream
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- 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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/24—Systems for the transmission of television signals using pulse code modulation
- H04N7/52—Systems for transmission of a pulse code modulated video signal with one or more other pulse code modulated signals, e.g. an audio signal or a synchronizing signal
- H04N7/54—Systems for transmission of a pulse code modulated video signal with one or more other pulse code modulated signals, e.g. an audio signal or a synchronizing signal the signals being synchronous
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/24—Systems for the transmission of television signals using pulse code modulation
- H04N7/52—Systems for transmission of a pulse code modulated video signal with one or more other pulse code modulated signals, e.g. an audio signal or a synchronizing signal
- H04N7/54—Systems for transmission of a pulse code modulated video signal with one or more other pulse code modulated signals, e.g. an audio signal or a synchronizing signal the signals being synchronous
- H04N7/56—Synchronising systems therefor
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
- H04H20/18—Arrangements for synchronising broadcast or distribution via plural systems
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- 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]
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Multimedia (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- Probability & Statistics with Applications (AREA)
- Theoretical Computer Science (AREA)
- Time-Division Multiplex Systems (AREA)
- Television Systems (AREA)
Abstract
Description
Die Erfindung betrifft ein Verfahren zur Codierung, Übertragung Speicherung und/oder Decodierung eines Informationskanals in Synchrondaten von Transportpaketen.The invention relates to a method for coding, transmission Storage and / or decoding of an information channel in Synchronized data of transport packages.
Aktuell wird die Definition eines digitalen, terrestrischen MDTV-Übertragungssystems im Rahmen des HDTV-T Projektes auf eu ropäischer Ebene angestrebt. Dies wird beispielsweise beschrie ben in: "Digitale terrestrische HDTV-Übertragung, Probleme und Lösungs wege"; D.Mepper, Fernseh- und Kinotechnik, Nr.2/1993 und in "Digitale terrestrische Fernsehübertragung"; D. Westerkamp, Fernseh- und Kinotechnik, Nr.5/1993.Currently the definition of a digital, terrestrial MDTV transmission system as part of the HDTV-T project on eu aspired to the European level. This is described, for example ben in: "Digital terrestrial HDTV transmission, problems and solutions wege "; D.Mepper, television and cinema technology, No. 2/1993 and in "Digital terrestrial television broadcasting"; D. Westerkamp, TV and cinema technology, No. 5/1993.
Dieses Übertragungssystem umfaßt eine digitale Fehlererkennung und Korrektur. Dadurch bedingt wird am Rand des Versorgungsge bietes ein abrupter Abbruch des Empfangssignals stattfinden, so bald die Korrekturkapazität der Fehlererkennung überschritten wird. Aus diesem Grund wird ein hierarchisches System ange strebt, welches aus drei verschiedenen Ebenen des Fehlerschutzes besteht. Im Randbereich des Versorgungsgebietes wird auf diese Weise eine sogenannte "graceful degradation" der Bildqualität erreicht. Ein Empfänger benötigt aber für die Rekonstruktion der digitalen Fernsehsignale eine Information über die Aufteilung dieser Signale auf die drei verschiedenen Ebenen. Diese Informa tion kann in einem separaten Datenkanal übertragen werden.This transmission system includes digital error detection and correction. This is due to the edge of the supply area offers an abrupt termination of the received signal, so soon the correction capacity of the error detection was exceeded becomes. For this reason, a hierarchical system is used aspires to be from three different levels of error protection consists. In the border area of the supply area is on this A so-called "graceful degradation" of the image quality reached. However, a receiver needs for the reconstruction of the digital television signals information about the division of these signals to the three different levels. This informa tion can be transmitted in a separate data channel.
Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren zur Übertragung von Zusatz-Information in einem digitalen Fernsehsi gnal anzugeben, bei dem kein separater Datenkanal erforderlich ist. Diese Aufgabe wird durch das in Anspruch 1 angegebene Ver fahren gelöst.The invention has for its object a method for Transmission of additional information in a digital television si gnal to specify, in which no separate data channel is required is. This object is achieved by the ver specified in claim 1 drive solved.
Eine unterschiedliche Kapazität der Fehlerkorrektur in den drei Übertragungsebenen läßt sich durch eine unterschiedliche Redun danz der jeweils beteiligten Faltungscodes erzielen. Daraus re sultiert eine unterschiedliche Kapazität und Datenrate in den drei einzelnen Übertragungsebenen. Ein entsprechendes System ist in Fig. 1 dargestellt. MPEG2-Transport-Daten TD werden einem Transport-Splitter TSP zugeführt. Dieser stellt drei Daten-Layer L1, L2 und L3 (z. B. mit unterschiedlicher Auflösung) zur Verfü gung.A different capacity of error correction in the three transmission levels can be achieved by a different redundancy of the convolutional codes involved. This results in a different capacity and data rate in the three individual transmission levels. A corresponding system is shown in Fig. 1. MPEG2 transport data TD are fed to a transport splitter TSP. This provides three data layers L1, L2 and L3 (e.g. with different resolutions).
L1 wird über einen Reed-Solomon-Coder RS1, einen Interleaver IL1 und Faltungscoder FC1A und FC1B einem Symbol-Mapper SM zuge führt, der ein gemeinsames 64MR-QAM-Ausgangssignal zur Übertra gung abgibt. Das Ausgangssignal von IL1 wird in zwei Datenströme aufgespalten, von denen eine erste Gruppe von Bits den ersten Faltungs-Coder FC1A für eine erste Datenrate r=r1 und eine zweite Gruppe von Bits den zweiten Faltungs-Coder FC1B für eine zweite Datenrate r=r2 passiert.L1 is via a Reed-Solomon encoder RS1, an interleaver IL1 and convolutional encoders FC1A and FC1B are assigned to a symbol mapper SM which leads a common 64MR-QAM output signal for transmission delivery. The output signal from IL1 is divided into two data streams split, of which a first group of bits the first Convolutional encoder FC1A for a first data rate r = r1 and one second group of bits the second convolutional encoder FC1B for one second data rate r = r2 happens.
Entsprechendes gilt für L2, RS2, IL2, FC2A (r=r3), FC2B (r=r4) und für L3, RS3, IL3, FC3A (r=r5), FC3B (r=r6).The same applies to L2, RS2, IL2, FC2A (r = r3), FC2B (r = r4) and for L3, RS3, IL3, FC3A (r = r5), FC3B (r = r6).
Erfolgt nun am Sender eine Aufteilung des Datenstromes in die drei genannten Übertragungsebenen, muß diese Aufteilung am Emp fänger wieder rückgängig gemacht werden. Zusätzlich kann noch das Einfügen von Stopfdaten notwendig werden, um die Bandbreite des zu versendenden Signals an die Bandbreite des Übertragungs kanals anzupassen. Diese Stopfdaten müssen auf der Empfangsseite wieder aus dem Datenstrom entfernt werden. Es ist also eine ex akte Rekonstruktion des Senderdatenstromes am Empfänger notwen dig.The data stream is now divided into two at the transmitter three mentioned transmission levels, this division on Emp catcher can be undone. In addition, can the insertion of justification data will be necessary to the bandwidth of the signal to be sent to the bandwidth of the transmission adjust channel. This darning data must be on the receiving side removed from the data stream. So it's an ex Actual reconstruction of the transmitter data stream at the receiver is necessary dig.
Diese Notwendigkeit entsteht z. B. durch die Verwendung des MPEG2-Systemmultiplexes als Transport-Layer. Ein Quelldatenstrom gemäß der ISO/MPEG2-System-Spezifikation besteht aus einzelnen Transportpaketen. Innerhalb dieser Transportpakete werden soge nannte Zeitmarken eingestreut. Die Zeitmarken bilden sozusagen Uhrzeiten der Sendertaktes ab. Die Uhrzeiten werden zum Empfän ger übertragen und dienen dort dem Nachregeln des Empfängertak tes. Auf diese Weise wird der Empfängertakt auf den Sendertakt synchronisiert. Falls nun auf dem Übertragungsweg durch die Auf teilung des Datenstromes in die drei genannten Übertragungsebe nen die Reihenfolge der Datenpakete vermischt wird, ist diese Form der Taktsynchronisation nicht mehr so einfach möglich. Statt dessen muß entweder auf der Senderseite eine Vorsortierung der Datenpakete derart erfolgen, daß sich die korrekte Reihen folge auf der Empfängerseite automatisch ergibt, oder die Zeit marken müssen auf der Senderseite an die neue Paketreihenfolge angepaßt werden. Dieser Vorgang wird Re-Stamping genannt und ist nur dann anwendbar, wenn auf der Senderseite bereits die neue Folge der Datenpakete bekannt ist.This need arises, for. B. by using the MPEG2 system multiplexes as transport layers. A source data stream according to the ISO / MPEG2 system specification consists of individual Transport packages. So-called called timestamps interspersed. The time stamps form, so to speak Times of the transmitter clock from. The times become receptions ger transmitted and serve there to readjust the receiver clock tes. In this way the receiver clock is on the transmitter clock synchronized. If now on the transmission path through the up division of the data stream into the three named transmission levels If the order of the data packets is mixed, this is The form of clock synchronization is no longer so easy. Instead, a pre-sorting must be carried out either on the transmitter side of the data packets take place in such a way that the correct rows follow on the receiving end automatically, or the time stamps must be on the transmitter side to the new packet order be adjusted. This process is called and is re-stamping only applicable if the new one is already on the transmitter side Sequence of data packets is known.
Nach den derzeitigen Vorschlägen kann die Übertragung der Infor mation über die Paketreihenfolge in einem zusätzlichen Fast-In formation-Channel erfolgen. Ein solcher Fast-Information-Chan nel, im weiteren FIC genannt, zur Übertragung von Konfigurati onsdaten wurde im DAB-System (Digital-Audio-Broadcast) reali siert, siehe " Radiohören in OD-Qualität"; F. Müller-Römer, Funkschau Nr.16/1992.According to the current proposals, the transfer of the Infor mation about the packet order in an additional fast-in formation channel. Such a fast information chan nel, hereinafter referred to as FIC, for the transfer of configurations ons data was realized in the DAB system (digital audio broadcast) based, see "Radio listening in OD quality"; F. Müller-Römer, Funkschau No. 16/1992.
Für diesen Kanal soll ein separates Symbol innerhalb des OFDM- Multiplex reserviert werden. Der FIC benötigt jedoch einen eige nen Fehlerschutz, ein eigenes Modulationsschema und einen eige nen Parser. Hierfür ist zusätzlicher Aufwand im Sender und Emp fänger notwendig. Es ist jedoch ein Verfahren wünschenswert, welches keine zusätzliche Datenrate kostet und möglichst auf ein Re-Stamping verzichtet.For this channel, a separate symbol within the OFDM Multiplex reserved. However, the FIC needs its own error protection, its own modulation scheme and its own a parser. This requires additional effort in the transmitter and emp catcher necessary. However, a method is desirable which does not cost an additional data rate and if possible on one No re-stamping.
In den Transportpaketen ist ein Synchronisations-Byte enthalten. Erfindungsgemäß wird nun der FIC durch einen Informationskanal an Stelle der Synchronisations-Bytes der Transportpakete er setzt. Das Synchronisations-Byte kann für diesen Zweck verwendet werden, weil in allen zur Zeit diskutierten Systemen zur Über tragung von HDTV-Signalen über Kabel, Satellit oder terrestri sche Strecken die Erkennung des Transportpaket-Anfangs nicht auf dem Synchronisations-Byte im Transportpaket beruht, sondern auf einem zusätzlichen Mechanismus. A synchronization byte is included in the transport packets. According to the invention, the FIC is now through an information channel instead of the synchronization bytes of the transport packets puts. The synchronization byte can be used for this purpose become, because in all currently discussed systems for over transmission of HDTV signals via cable, satellite or terrestri The detection of the beginning of the transport package does not stretch out based on the synchronization byte in the transport package, but on an additional mechanism.
Die Anwendung der Erfindung beschränkt sich nicht auf die digi tale Signalübertragung. Vielmehr kann die Codierung und Speiche rung von Paketnummern in den Synchrondaten von Transportpaketen besonders vorteilhaft in der digitalen Aufzeichnungstechnik an gewendet werden.The application of the invention is not limited to digi tale signal transmission. Rather, the coding and spoke Packet numbers in the synchronous data of transport packets particularly advantageous in digital recording technology be turned.
Die Transportpakete können ISO/IEC13818-Transportpakete sein.The transport packages can be ISO / IEC13818 transport packages.
Im Prinzip besteht dient das erfindungsgemäße Verfahren zur Co dierung, Übertragung Speicherung und/oder Decodierung eines In formationskanals, wobei Informations-Bits in Synchrondaten von Datenpaketen angeordnet sind und wobei die Informations-Bits zur Ermittlung einer senderseitig zu verwendenden Reihenfolge von Datenpaketen, die verschiedenen Layern zugeordnet sind, dienen können.In principle, the method according to the invention is used for co dation, transmission, storage and / or decoding of an formation channel, with information bits in synchronous data from Data packets are arranged and the information bits for Determination of an order to be used by the sender Data packets that are assigned to different layers are used can.
Vorteilhafte Weiterbildungen des erfindungsgemäßen Verfahrens ergeben sich aus den zugehörigen abhängigen Ansprüchen.Advantageous further developments of the method according to the invention result from the associated dependent claims.
Anhand der Zeichnungen sind Ausführungs-Beispiele der Erfindung beschrieben. Diese zeigen in:Exemplary embodiments of the invention are shown in the drawings described. These show in:
Fig. 1 Teil eines Coders für ein HDTV-Übertragungssystem; FIG. 1 is part of a coder for a HDTV transmission system;
Fig. 2 Matrix von Transportpaketen; Fig. 2 matrix of transport packages;
Fig. 3 Details eines Transportpaketes. Fig. 3 details of a transport package.
Im Byte-Interleaver werden mehrere Transportpakete mit Synchro nisations-Byte SB, Paketkopf PH, Nutzdaten UD und Fehlerschutz EC horizontal in eine Matrix mit den Zeilen 21-28 gemäß Fig. 2 eingelesen und vertikal wieder ausgelesen. Auf diese Weise ent steht ein byte-weise verschachtelter Datenstrom. Da die Länge der Transportpakete inklusive Fehlerschutz konstant ist, sind auf diese Weise die Anfangspositionen der Transportpakete be kannt. Wenn nicht alle Bits im Synchronisations-Byte SB des Transportpaketes zum Beispiel für die Signalisierung der Paket reihenfolge oder ähnlicher Daten verwendet werden, können die übrigen Bits weiterhin für die Verbesserung der Synchronisation verwendet werden.In the byte interleaver, several transport packets with synchronization byte SB, packet header PH, user data UD and error protection EC are read horizontally into a matrix with lines 21-28 according to FIG. 2 and read out again vertically. This creates a byte-wise nested data stream. Since the length of the transport packages including error protection is constant, the starting positions of the transport packages are known in this way. If not all bits in the synchronization byte SB of the transport packet are used, for example, for signaling the packet sequence or similar data, the remaining bits can continue to be used for improving the synchronization.
Statt einer Matrix kann auch eine andere Datenstruktur verwendet werden.Another data structure can also be used instead of a matrix become.
Ein solcher Mechanismus kann nun erfindungsgemäß als eigenstän diger Informationskanal zur Übertragung anderer wichtiger Konfi gurationsdaten verwendet werden. Dieser Kanal könnte ebenfalls die Funktionalität des FIC integrieren.Such a mechanism can now be used according to the invention as a stand-alone Information channel for the transmission of other important confi gurationsdaten be used. This channel could also integrate the functionality of the FIC.
Ein Transportpaket, wie es zur Zeit für den MPEG2-Systemmulti plex vorgeschlagen wird, besteht aus 188 Byte. Wie in Fig. 3 dargestellt, ist das erste Byte ein Synchronisations-Byte SB. Anschließend folgen drei weitere Byte, die den Kopf PH des Transportpaketes bilden, und 184 Nutzbyte uD, die eigentlichen Datenbyte. Ein Teil der Bits oder alle Bits des Synchronisati ons-Bytes SB werden während der Übertragung als Informationska nal genutzt.A transport package, as is currently proposed for the MPEG2 system multiplex, consists of 188 bytes. As shown in Fig. 3, the first byte is a synchronization byte SB. This is followed by three further bytes, which form the header PH of the transport packet, and 184 useful bytes uD, the actual data bytes. Some or all of the bits of the synchronization byte SB are used as an information channel during transmission.
In diesem Kanal kann z. B. die Reihenfolge der Transportpakete, wie sie für die hierarchische HDTV-Übertragung benötigt wird, übertragen werden.In this channel z. B. the order of the transport packages, as it is required for the hierarchical HDTV transmission, be transmitted.
Dieser Kanal kann ebenfalls andere Konfigurations-Informationen, wie sie derzeit für den "Fast-Information-Channel" diskutiert werden, übertragen.This channel can also have other configuration information, as they are currently discussing for the "Fast Information Channel" are transferred.
Die nicht benötigten Bits im Synchronisations-Byte können für eine verbesserte Synchronisation des Empfängers verwendet wer den.The bits in the synchronization byte that are not required can be used for an improved synchronization of the receiver used who the.
Am Empfänger kann die Information ausgewertet werden und an schließend wieder durch das korrekte Synchronisations-Byte er setzt werden.The information can be evaluated and sent to the recipient then again by the correct synchronization byte be set.
Die Informations-Bits können zur Codierung, Übertragung, Speicherung und/oder Decodierung einer Reihenfolge von Datenpa keten und/oder Taktinformationen verwendet werden.The information bits can be used for coding, transmission, Storage and / or decoding of an order of data pairs keten and / or clock information are used.
Es ergeben sich folgende Vorteile des erfindungsgemäßen Verfah rens:The advantages of the method according to the invention are as follows rens:
- - Gewinn von Übertragungskapazität durch die Nutzung des Synchronisations-Bytes in den Transportpaketen;- Gain transmission capacity by using the Synchronization bytes in the transport packets;
- - Verzicht auf einen dedizierten "Fast-Information-Channel" möglich. Daraus folgt, daß zusätzliche Hardware für die Be handlung des Fehlerschutzes, der Modulation und des Parsing für den "Fast-Information-Channels" im Sender und Empfänger vermieden werden kann;- No dedicated "Fast Information Channel" possible. It follows that additional hardware for the Be action of error protection, modulation and parsing for the "Fast Information Channels" in the sender and receiver can be avoided;
- - Durch die Unterbringung der Informationen direkt im Trans portpaket wird diese Information gleichzeitig so gut wie das Transportpaket selbst gegen Übertragungsfehler geschützt;- By placing the information directly in the trans portpaket, this information is as good as that at the same time Transport package itself protected against transmission errors;
- - Leichter Zugriff auf die Informationen, da das Synchronisa tions-Byte das erste Byte im Transport-Paket ist. Der Zu griff auf diese Information ist direkt ohne zusätzlichen Aufwand möglich, da eine Verarbeitung des Transportpaket- Kopfes ohnehin erfolgen muß.- Easy access to the information since the Synchronisa tion byte is the first byte in the transport packet. The To Access to this information is direct without additional Effort possible because processing of the transport package Head must be done anyway.
Claims (6)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4435833A DE4435833A1 (en) | 1993-11-23 | 1994-10-07 | Information channel data encoding, transmission, storage and decoding e.g. for HDTV signal |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4339823 | 1993-11-23 | ||
DE4400486 | 1994-01-11 | ||
DE4435833A DE4435833A1 (en) | 1993-11-23 | 1994-10-07 | Information channel data encoding, transmission, storage and decoding e.g. for HDTV signal |
Publications (1)
Publication Number | Publication Date |
---|---|
DE4435833A1 true DE4435833A1 (en) | 1995-05-24 |
Family
ID=25931443
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE4435833A Withdrawn DE4435833A1 (en) | 1993-11-23 | 1994-10-07 | Information channel data encoding, transmission, storage and decoding e.g. for HDTV signal |
Country Status (1)
Country | Link |
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DE (1) | DE4435833A1 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1998010553A2 (en) * | 1996-09-02 | 1998-03-12 | Telia Ab (Publ) | Improvements in, or relating to, control channels for telecommunications transmission systems |
DE19652187A1 (en) * | 1996-12-14 | 1998-06-18 | Asea Brown Boveri | Method for transmitting digitized user data and signaling data over a channel |
EP0802651A3 (en) * | 1996-04-15 | 2000-08-09 | Robert Bosch Gmbh | Error-robust multiplexing method with possible retransmission |
EP0802646A3 (en) * | 1996-04-15 | 2000-08-09 | Robert Bosch Gmbh | Error-robust multiplexing method with header control field |
-
1994
- 1994-10-07 DE DE4435833A patent/DE4435833A1/en not_active Withdrawn
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0802651A3 (en) * | 1996-04-15 | 2000-08-09 | Robert Bosch Gmbh | Error-robust multiplexing method with possible retransmission |
EP0802646A3 (en) * | 1996-04-15 | 2000-08-09 | Robert Bosch Gmbh | Error-robust multiplexing method with header control field |
WO1998010553A2 (en) * | 1996-09-02 | 1998-03-12 | Telia Ab (Publ) | Improvements in, or relating to, control channels for telecommunications transmission systems |
WO1998010553A3 (en) * | 1996-09-02 | 1998-05-07 | Telia Ab | Improvements in, or relating to, control channels for telecommunications transmission systems |
US6538986B2 (en) | 1996-09-02 | 2003-03-25 | Stmicroelectronics N.V. | Data transmission system and method using nQAM constellation with a control channel superimposed on a user data channel |
DE19652187A1 (en) * | 1996-12-14 | 1998-06-18 | Asea Brown Boveri | Method for transmitting digitized user data and signaling data over a channel |
US6307870B1 (en) | 1996-12-14 | 2001-10-23 | Asea Brown Boveri Ag | Process for transmitting digitized payload and signalling data over a channel |
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