METHOD AND DEVICE FOR FORMING A COMMON DATASTREAM ACCORDING TO THE ATSC STANDARD

• US 20090175356A1
• Filed: 12/10/2008
• Published: 07/09/2009
• Est. Priority Date: 12/11/2007
• Status: Active Grant

• Current Assignee: Rohde & Schwarz GmbH & Company KG
• Original Assignee: Rohde & Schwarz GmbH & Company KG
• Inventors: Hagemeier, Denis, Goerig, Torsten
• Granted Patent: US 9,800,897 B2
• Time in Patent Office: Days
• US Class Current: 375/240.260
• CPC Class Codes: H04N 19/61 in combination with predictive coding
• CPC Class Codes: H04N 21/235 Processing of additional data, e.g. scrambling of additional data or processing content descriptors
• CPC Class Codes: H04N 21/23608 Remultiplexing multiplex streams, e.g. involving modifying time stamps or remapping the packet identifiers
• CPC Class Codes: H04N 21/23655 Statistical multiplexing, e.g. by controlling the encoder to alter its bitrate to optimize the bandwidth utilization
• CPC Class Codes: H04N 21/2381 Adapting the multiplex stream to a specific network, e.g. an Internet Protocol [IP] network transmission of MPEG streams over ATM H04L12/5601
• CPC Class Codes: H04N 21/2383 Channel coding or modulation of digital bit-stream, e.g. QPSK modulation arrangements for detecting or preventing errors in the information received by adapting the channel coding H04L1/0009; analogue front ends or means for connecting modulators, demodulators or transceivers to a transmission line H04L27/0002
• CPC Class Codes: H04N 21/2665 Gathering content from different sources, e.g. Internet and satellite
• CPC Class Codes: H04N 21/435 Processing of additional data, e.g. decrypting of additional data, reconstructing software from modules extracted from the transport stream

Abstract

A method and a device for forming a common transport datastream from several mobile-digital television signal datastreams and a common stationary-digital television signal datastream. A constant number of data units of respectively-constant size in every successive time interval with constant cycle duration for the transmission of every individual datastream is determined. A data structure is specified for the common datastream with successive sequences in each case of a constant number of data units with respectively-identical positions for data units of the stationary-digital television signal and respectively-identical positions for data units of the mobile-digital television signal. Data units of each of the datastreams of the mobile-digital television signal are transmitted in each case in associated, identical positions of at least one successive sequence, and define the individual positions of the data structure of the common datastream with data units of the respectively associated datastreams.

Claims

1. A method for forming a common transport datastream from a plurality of a mobile-digital television signal datastreams and from a common stationary-digital television signal datastream, comprising:

determining a constant number of data units for each of the plurality of mobile-digital television signal datastreams and the common stationary-digital television signal datastream, each constant number having a constant size in every successive time interval with a constant cycle duration for the transmission of the plurality of mobile-digital television signal datastreams and the common stationary-digital television signal datastream;

determining a data structure for the common transport datastream with successive sequences in each case with a constant number of data units with respectively identical positions for data units of a stationary-digital television signal datastream and identical positions for data units of the mobile-digital television signal datastream, respectively, wherein data units of each of the mobile-digital television signal datastreams are transmitted respectively in associated, identical positions of at least one successive sequence; and

packing individual positions of the data structure of the common transport datastream with data units of the associated plurality of mobile-digital television signal datastreams and common stationary-digital television signal datastream.

2. The method for forming a common datastream according to claim 1, wherein, in respectively-identical positions provided for data units of the mobile-digital television signal datastream and in blocks of successive sequences of data units, in each case, only data units of a single mobile-digital television signal datastream are transmitted.

3. The method for forming a common transport datastream according to claim 2, wherein the number of positions for data units of the mobile-digital television signal datastream per sequence is obtained from the greatest common divisor of the number of data units per time interval determined respectively for each individual datastream.

4. The method for forming a common transport datastream according to claim 3, wherein the number of successive sequences of each block of successive sequences determined for data units respectively of one datastream of the mobile-digital television signal is obtained by dividing the number of data units per time interval determined respectively for each individual datastream by the greatest common divisor of the number of data units per time interval determined respectively for each individual datastream.

5. The method for forming a common transport datastream according to claim 1, wherein data units of several mobile-digital television signal datastreams are transmitted respectively in a given number of respectively identical positions reserved for data units of the mobile-digital television signal datastreams in each sequence of data units and in blocks of successive sequences.

6. The method for forming a common transport datastream according to claim 5, wherein the number of positions for data units of the mobile-digital television signal datastream per sequence is obtained from the greatest common divisor of the individual summed numbers of data units respectively from the plurality of mobile-digital television signal datastreams, which are transmitted in each case simultaneously in at least one sequence.

7. The method for forming a common transport datastream according to claim 6, wherein the number of successive sequences of every block of successive sequences, in which respectively data units of a plurality of mobile-digital television signal datastreams are transmitted simultaneously, is obtained by dividing the individual summed numbers of data units from the plurality of mobile-digital television signal datastreams transmitted in each case simultaneously in at least one sequence by the greatest common divisor of the summed numbers of data units of the mobile-digital television signal datastreams transmitted in each case simultaneously in at least one sequence.

8. The method for forming a common transport datastream according to claim 3, wherein the number of the sequences per time interval is obtained from the sum of the number of successive sequences determined respectively for every block of successive sequences, in which respectively data units of one or more mobile-digital television signal datastreams are transmitted.

9. The method for forming a common transport datastream according to claim 8, wherein the number of positions for data units of the stationary-digital television signal per sequence is obtained by dividing the number of data units of the stationary-digital television signal per time interval by the number of sequences per time interval.

10. The method for forming a common transport datastream according to claim 1, wherein the data units of every sequence are arranged in each case in an identical number of data packets with a respectively constant number of data units.

11. The method for forming a common transport datastream according to claim 10, wherein the data units of the mobile-digital television signal are transmitted in each case in successive positions in the sequences of data units.

12. The method for forming a common transport datastream according to claim 10, wherein positions with data units of the mobile-digital television signal are arranged within the sequences of data units intermittently relative to positions with data units of the stationary-digital television signal.

13. The method for forming a common transport datastream according to claim 1, wherein in each case, a constant number of sequences with data units of a single mobile-digital television signal datastream are combined to form a first subordinate combination of data units.

14. The method for forming a common transport datastream according to claim 1, wherein in each case a constant number of data units, which are stored in respectively identical positions for data units of at least one of the stationary and mobile-digital television signal datastreams successively within a sequence of data units and in successive sequences of data units, are combined to form a second subordinate combination of data units.

15. The method for forming a common transport datastream according to claim 13, wherein a plurality of first or second subordinate combinations of data units are combined in each case to form a first or second superordinate combination of data units.

16. A device for forming a common transport datastream from a plurality of mobile-digital television signal datastreams and a common stationary-digital television signal datastream, comprising:

a plurality of stationary-digital television coding units configured generate a plurality of stationary-digital television signal datastreams from respective stationary-digital television channels;

a plurality of mobile-digital television coding units configured to generate a plurality of mobile-digital television signal datastreams from respective mobile-digital television channels;

a first multiplexer configured to generate the common stationary-digital television signal datastream from the plurality of stationary-digital television signal datastreams; and

a second multiplexer in communication with the first multiplexer and the plurality of stationary-digital television coding units and the plurality of mobile-digital television coding units and configured to generate the common transport datastream from the plurality of mobile-digital television signal datastreams and the common stationary-digital television signal datastream,

wherein one of the plurality of mobile-digital television coding units operates as a superordinate master unit and is connected to the other mobile-digital television coding units operating as subordinate slave units,

wherein a data structure for the common transport datastream is formed with successive sequences in each case of a constant number of data units with respectively identical positions for data units of the stationary-digital television signal datastream and identical positions for data units of the respective mobile-digital television signal datastream, and

wherein data units of each mobile-digital television signal datastream are transmitted respectively in associated, identical positions from at least one successive sequence.

17. The device for forming a common datastream according to claim 16, wherein, in respectively-identical positions provided for data units of the mobile-digital television signal datastream and in blocks of successive sequences of data units, in each case, only data units of a single mobile-digital television signal datastream are transmitted.

18. The device for forming a common transport datastream according to claim 17, wherein the number of positions for data units of the mobile-digital television signal datastream per sequence is obtained from the greatest common divisor of the number of data units per time interval determined respectively for each individual datastream.

19. The device for forming a common transport datastream according to claim 18, wherein the number of successive sequences of each block of successive sequences determined for data units respectively of one datastream of the mobile-digital television signal is obtained by dividing the number of data units per time interval determined respectively for each individual datastream by the greatest common divisor of the number of data units per time interval determined respectively for each individual datastream.

20. The device for forming a common transport datastream according to claim 16, wherein data units of several mobile-digital television signal datastreams are transmitted respectively in a given number of respectively identical positions reserved for data units of the mobile-digital television signal datastreams in each sequence of data units and in blocks of successive sequences.

21. The device for forming a common transport datastream according to claim 20, wherein the number of positions for data units of the mobile-digital television signal datastream per sequence is obtained from the greatest common divisor of the individual summed numbers of data units respectively from the plurality of mobile-digital television signal datastreams, which are transmitted in each case simultaneously in at least one sequence.

22. The device for forming a common transport datastream according to claim 21, wherein the number of successive sequences of every block of successive sequences, in which respectively data units of a plurality of mobile-digital television signal datastreams are transmitted simultaneously, is obtained by dividing the individual summed numbers of data units from the plurality of mobile-digital television signal datastreams transmitted in each case simultaneously in at least one sequence by the greatest common divisor of the summed numbers of data units of the mobile-digital television signal datastreams transmitted in each case simultaneously in at least one sequence.

23. The device for forming a common transport datastream according to claim 18, wherein the number of the sequences per time interval is obtained from the sum of the number of successive sequences determined respectively for every block of successive sequences, in which respectively data units of one or more mobile-digital television signal datastreams are transmitted.

24. The device for forming a common transport datastream according to claim 23, wherein the number of positions for data units of the stationary-digital television signal per sequence is obtained by dividing the number of data units of the stationary-digital television signal per time interval by the number of sequences per time interval.

25. The device for forming a common transport datastream according to claim 16, wherein the data units of every sequence are arranged in each case in an identical number of data packets with a respectively constant number of data units.

26. The method for forming a common transport datastream according to claim 25, wherein the data units of the mobile-digital television signal are transmitted in each case in successive positions in the sequences of data units.

27. The device for forming a common transport datastream according to claim 25, wherein positions with data units of the mobile-digital television signal are arranged within the sequences of data units intermittently relative to positions with data units of the stationary-digital television signal.

28. The device for forming a common transport datastream according to claim 16, wherein in each case, a constant number of sequences with data units of a single mobile-digital television signal datastream are combined to form a first subordinate combination of data units.

29. The device for forming a common transport datastream according to claim 16, wherein in each case a constant number of data units, which are stored in respectively identical positions for data units of at least one of the stationary and mobile-digital television signal datastreams successively within a sequence of data units and in successive sequences of data units, are combined to form a second subordinate combination of data units.

30. The device for forming a common transport datastream according to claim 28, wherein a plurality of first or second subordinate combinations of data units are combined in each case to form a first or second superordinate combination of data units.